СПОСОБ ХРАНЕНИЯ (МЕТ)АКРИЛАТА

Изобретение относится к способу хранения (мет)акрилата в резервуаре из менее дорогого и очень универсального материала без потери стабильности сохраняемого (мет)акрилата. Более конкретно, настоящее изобретение относится к способу хранения алкилового эфира акриловой или метакриловой кислоты в резервуаре при циркуляции или перемешивании при температуре от 15 до 50°С, включающему подачу газовой смеси, полученной смешиванием негорючего инертного газа с молекулярным кислородом, в резервуар, где концентрация молекулярного кислорода в газовой смеси составляет от 2 до 10 об.%; резервуар изготовлен из углеродистой стали и оборудован трубой впуска газа и трубой выпуска газа; газ имеет концентрацию воды 100 объемных частей на миллион (об. ч./млн) или меньше; и алкиловый эфир акриловой или метакриловой кислоты имеет концентрацию (мет)акриловой кислоты 30 массовых частей на миллион (мас. ч./млн) или меньше. 1 з.п. ф-лы.

УСТРОЙСТВО ДЛЯ ИЗМЕНЕНИЯ НАПРАВЛЕНИЯ ДВИЖЕНИЯ ЛИСТОВОГО МАТЕРИАЛА

... 1. Транспортное устройство (10; 10') для транспортировки плоского прямоугольного листового материала (BN), прежде всего, листообразных ценных документов, например банкнот, содержащее по меньшей мере один распределитель (12; 108; 113; 125а, 125b) или по меньшей мере два распределителя, установленный(-ых) с возможностью возвратно-поступательного движения между двумя положениями для перемещения подаваемых листов листового материала (BN) выборочно или попеременно по меньшей мере в двух положениях (11a, 11b) отвода, и по меньшей мере одно отводящее устройство (13а, 13b), выполненное с возможностью удаления листов (BN) из положений (11a, 11b) отвода в соответствующих им направлениях (В) отвода. ! 2. Устройство по п.1, выполненное таким образом, что по меньшей мере одно из направлений (В) отвода и направление (А) подачи являются разными. ! 3. Устройство по п.2, выполненное таким образом, что по меньшей мере одно из направлений (В) отвода проходит под углом 90° к направлению (А) подачи. ! 4. Устройство ...

Устройство для захвата из пачек листовых заготовок и их подачи к исполнительным механизмам

Устройство для разбора штабеля листовогоМАТЕРиАлА

Автоматическая линия для облицовки древесностружечных плит

Verfahren und Vorrichtung für einen externen Medienspeicher

Bogenförderapparat

Kopiergerät mit einer automatischen Vorlagenzuführeinrichtung

Material mit niedriger Oberflächenenergie

Druckmechanismus für einen automatischen Bankschalter

WALZENZUFUEHRUNGSEINRICHTUNG

Arrangement for removal of sheets from cutting device, comprises table with tipping segment

A platform (6) is positioned between a sheet cutting device (100) and a storage unit (101). The platform (6) is made of metal or is earthed in order to avoid an electrostatic effect. The sheets are guided across a flexible insert (27) first to a segment (22) of the platform (6) which can be tilted around a horizontal axle (21) and from there to several transversally positioned conveyor shafts (7) located on top of the table (6). Small paper sections fall through the gap between the cutting device (100) and the tilting area (22) and are collected underneath.

FRIKTIONSANTRIEB FUER MINDESTENS ZWEI FRIKTIONSWALZEN

Bogentransportvorrichtung

Aufzeichnungssystem

GERAET ZUR AUTOMATISCHEN DOKUMENTVERARBEITUNG

Papierförderungsgerät und Druckgerät

Achslager und Filmtransportvorrichtung

Wälzlager mit einem Innenring, einem Außenring, zahlreichen Rollkörpern und einem ringförmigen Kugelkäfig, welcher durch Spritzgießen aus einer faserförmiges Füllmaterial enthaltenden Harzzusammensetzung mit ETFE (Ethylen-Tetrafluorethylen Copolymer) als Hauptbestandteil geformt wird, wobei die Führungsform in dem vorgenannten Kugelkäfig eine Lagerringführung ist und der besagte Innenring und Außenring in deren Umlaufebene sowie in der Rollebene der vorgenannten Rollkörper auf einer Gesamtoberfläche von 1 m2 mehr als 1,0 g aber weniger als 10 g Schmiermittel aufgetragen wird.

APPARATUS FOR ADVANCING PHOTOGRAPHIC PRINT PAPER

ARTIKELDRUCKSYSTEM

Verfahren und Gerät zur Bestimmung der Druckstellung und Drucker.

Gleitend gelagerte Transportanordnung in einem thermografischen Laserbelichter

Vorrichtung zum Ausrichten flacher Gegenstände, insbesondere von Faltschachtelzuschnitten

Die Erfindung betrifft eine Vorrichtung zum Ausrichten von flachen Gegenständen. Die Vorrichtung weist mehrere Bearbeitungsstationen auf, wobei die Bearbeitungsstationen modular aufgebaut sind und jeweils unabhängige Förderelemente zum Transport der Zuschnitte aufweisen. Die Bearbeitungsstationen sind einzeln oder als Verbund relativ zu den übrigen Bearbeitungsstationen quer nach rechts oder links verstellbar angeordnet.

Verfahren zur Staubeseitigung von Kopierblättern

Conveying device for bookbinding machine, has bearing balls in receptacle holes whose axes are inclined at angle to respective verticals of conveying planes

The conveying device includes an endless conveyor belt (3), and a ball strip (6) with bearing balls (7). The bearing balls are retained in receptacle holes (8) in the ball strip in conveying sections (1a,1b) with a conveying plane (E) that is at an angle (beta) to the horizontal (H). The hole axes of the receptacles are inclined at an angle (alpha) to the vertical (S) of the respective conveying plane.

VORRICHTUNG ZUM STAPELN FLACHER GEGENSTAENDE

VORRICHTUNG ZUM FOERDERN EINZELNER BLAETTER

VORRICHTUNG ZUM ZUFUEHREN UND AUSRICHTEN VON EINZELBLAETTERN

Vorrichtung zum Transportieren von Papierblättern

Bilderzeugungsvorrichtung

FALTMASCHINE MIT EINER PAPIEREINZUGSVORRICHTUNG

Verfahren und Vorrichtung zur Korrektur der Lageabweichung eines Transportgutes

Zur Korrektur der Lage eines Transportgutes (12) in einer Transporteinrichtung (10) wird die Abweichung des Transportgutes (12) von seiner Soll-Lage erfasst. Sofern sich aus dieser Abweichung ergibt, dass eine Korrektur erforderlich ist, wird aus einer Mehrzahl vorhandener Korrekturprofile (P1, P2, P3) ein geeignetes Korrekturprofil Pi gewählt und die Korrektur durchgeführt.

Automatische Foerdervorrichtung fuer Datenkarten

Vorrichtung zum Transport von flachen Gegenständen

Die Erfindung geht aus von einer Vorrichtung (2) zum Transport von flachen Gegenständen mit zwei Transportsträngen (6, 8) und einem zwischen den Transportsträngen (6, 8) angeordneten Beschleunigungsmittel (10) mit einem Klemmhalterpaar zum klemmenden, bewegten Halten der Gegenstände in ihren gegenüberliegenden Flachseiten. Um unterschiedlich dicke Gegenstände schonend beschleunigen zu können, wird vorgeschlagen, dass zumindest ein Klemmhalter (20) des Klemmhalterpaar seine Segmenteinheit (22) mi 32, 34) zum Klemmen unterschiedlich dicker Gegenstände (4) umfasst.

Skew Correcting device and image forming apparatus

Apparatus and method for receiving a sheet from a first direction and feeding the sheet in a second direction

PAPER FEEDING DEVICE FOR A COPYING MACHINE PRINTING MACHINE OR THE LIKE

... 1372265 Feeding sheets FUJI SHASHIN KOKI KK 21 Dec 1971 [21 Dec 1970] 59514/71 Heading B8R A sheet separating device, e.g. in a copying or printing machine, comprises a container 30 for receiving a pile of sheets e and having an abutment 30 1 for engaging one edge of the pile, a resilient means, e.g. a blade 29, for engaging the top surface of the topmost sheet of the pile and a roller 31 for engaging said surface and being rotatable in one sense, e.g. opposite to arrow g, to buckle to topmost sheet against the abutment 30 1 and free the sheet from the resilient means, and in the opposite sense g to feed the sheet over the resilient means, e.g. to a movable front register stop and pinch rollers (not shown). The container may be spring urged towards the roller. The drive to the roller may be via a solenoid operated gear-box and magnetic clutch arrangement.

DOCUMENT FEED APPARATUS

... 1472555 Stripping sheets INTERNATIONAL BUSINESS MACHINES CORP 18 Nov 1974 [26 Dec 1973] 49749/74 Heading B8R Sheets being removed from a platen 10 by a belt transport 17 are stripped from the belt by a plurality of rollers 41 which make rubbing contact with the belt and move in the opposite peripheral direction at the point of engagement. A sheet is fed to the platen upon lowering of stops 15 and passes into the nip between spring 28 and the belt 17. The sheet is fed by the belt up to front register stops 29, engagement of the sheet by the belt being ensured by spaced pressure rollers 32 acting on the inside of the belt. After a copying operation a solenoid lowers the stops 29 and the sheet is removed from the platen by the belt and is stripped from the belt by rollers 41. The stripped sheet passes into the nip between the rollers and a resiliently biased plate 46 where the sheet activates a lever 49 so causing a member 491 to operate a switch 51. The switch operates the solenoid ...

Sheet Feeding Apparatus

... 1,156,960. Feeding sheets. INTERNATIONAL BUSINESS MACHINES CORP. 26 July, 1967 [27 July, 1966], No. 34210/67. Heading B8R. Sheet feeding apparatus includes two coacting freely rotatable balls A and B, first drive means 13, for rotating the balls so that a sheet introduced between them is moved in a first direction, second drive means 14, for rotating the balls so that the sheet is moved in a second direction and means for coupling the balls selectively to the first or second drive means. As shown, a sheet 7 is inserted between sets of balls A and B, whilst balls B are being driven by rollers 13, and is thereby pulled downwards until it abuts the channel 40. Spring 31 which pulls the assembly holding the balls A and B against rollers 13 exerts a pull such that the balls slip on the sheet as soon as it abuts channel 40. A relay may then be energized (manually or automatically) which pulls the ball-holding assembly away from rollers 13 and causes balls A to contact driving belt 14 fed over ...

A card or ticket transport apparatus

AUTOMATIC WEAR COMPENSATING MECHANISM

... 1376859 Feeding sheets RCA CORPORATION 18 April 1973 [20 April 1972] 18750/73 Heading B8R Double feed is prevented by a reversely rotating roller 15 having a urethane surface 16 which is maintained at a fixed distance from a feed drum 18 greater than the thickness of one sheet but less than that of two. The roller is mounted in a bracket 27 mounted for limited vertical movement on a fixed base 29, and the bracket and roller are urged towards the drum by springs or by the tension of an O-ring belt 19. Pivoted to the bracket at 26 is a rigid assembly comprising arms 25A, 25B respectively carrying a wear-sensing roller 23 engaging the surface 16 and a roller 21 engaging the drum 21. The roller 21 thus limits the movement of the bracket and roller 15 towards the drum, and as the diameter of the roller 15 decreases due to wear, the roller 23 moves inwards to allow the roller 21 to use and permit movement of the roller 15 towards the drum to maintain its distance therefrom constant.

Improvements in or relating to sheet feeding mechanism

... 678,157. Feeding sheets. FORD, R. M., and FORD, Ltd., F. R. May 31, 1949 [May 31, 1948], No. 14599/48. Class 100 (i). [Also in Group XXIV] A sheet-feeding device particularly for rotary mirrorscript duplicators, is constructed with one or more friction separating rollers 50 mounted in a casing 54, Fig. 3, provided with a handle 68 by means of which the rollers may be lifted out of their normal position resting on a pile of sheets 12. The sheets are carried by a table 38 mounted on a frame which is fitted with rollers 16 moving in vertical guides, and the table is raised as the sheets are fed by a lever 17, 19 which is rotated slowlv in a clockwise direction by a cam 70 which is advanced intermittently by a cam 26 on a shaft 79 and lever- and-link mechanism 28, 30, 31 controlling pawl-and-ratchet mechanism 32, 33 geared by reduction gearing 35, 36 to a gear 37 which drives the cam 20 through a freewheel device. The rubber friction rollers 50 are carried by a shaft 51, Fig. 5, mounted in ...

Mail-handler device

A mail-handler device for mounting adjacent to a mail-receiving slot 5 comprises sensing means eg contacts 14, 15 or flaps 6,8 for responding to the insertion of an item of mail through the slot from one side thereof, and conveying means eg rollers (10) for engaging the inserted item of mail and controlled by the sensing means so as to convey the inserted item of mail wholly through the mail- receiving slot. ...

DRAG CLUTCH DOCUMENT FEEDER MECHANISM

A DOCUMENT CONVEYOR SYSTEM

A transport path

FRICTION ROLLER PAIR

Controlling movement of glass sheet

An apparatus for synchronizing the movement of glass sheets through a furnace includes a stop for holding the sheets at the entrance to the furnace. An actuator is responsive to a synchronizing signal for moving the stop and releasing the sheet into the furnace. A reference point sensor detects a reference point associated with a rotating conveyor roller adjacent the entrance to the furnace when the reference point is in a predetermined spatial relationship to the glass sheet which is being held at the entrance. Thus, each glass sheet enters the furnace and engages the conveyor rollers in the same position such that any roller corrugation pattern is reproduced in the same position on each glass sheet. When two such glass sheets are laminated together to form a windshield, the roller corrugation patterns can be matched to reduce the optical distortion produced by the corrugation.

ROTARY PRINTING PRESS SHEET FEEDING SYSTEM

Sheets 3 are fed individually from a stack 1 and transported to a printing unit of the rotary printing press, by a feed roller 19 driven by a cyclically variable gear arrangement comprising two cooperating rolling bodies 29, 30 which are non-cylindrical with respect to their axes of rotation, one of the rolling bodies 29 being coupled to the press drive, and the other rolling body 30 being connected to an output shaft F11 on which is mounted the cyclically driven feed roller. ...

Apparatus for changing the direction of conveyed paper

An apparatus for changing the direction of conveying paper in which paper is stopped by the operation of driving roller pairs in conjunction with idle roller pairs. The respective driving and idle roller pairs are urged against one another by the operation of a solenoid or the like. In order to move the paper, a clutch is engaged to rotatably operate the driving pairs.

Sheet feed device for image forming equipment

Printing method and printing apparatus

JAM CLEARING DEVICE

Origanal conveying device for a copying machine

A plurality of discrete length paper recirculation paths are connectable in series in accordance with the detected length of an original document, so that the shortest possible recirculation path length is selected to maximize copying speed.

APPARATUS FOR HANDLING THIN SHEETS OF MATERIAL

A banknote acceptor feeder device

OPENING ENVELOPE FLAPS IN LETTER FEED APPARATUS

Improvements in or relating to devices for feeding sheets to machines

... 590,119. Feeding sheets. BOBST ET FILS, SOC. ANON., J. April 12, 1945, No. 9187. Convention date, June 26,1944. [Class 100 (i)] Sheets are fed to machines by means of a roller 4, which is driven intermittently in a counterclockwise direction or is oscillated, and with roller 4 co-operates a number of freely mounted rollers 7 mounted in lever arms 11, 12 on an ocsillating shaft 10 which moves the rollers 7 into and out of contact with the roller 4. The sheets pass from the rollers 4, 7 to a freely mounted roller 24 with which co-acts a number of rollers 25 mounted on lever arms 28 and pressed into contact with roller 24 by means of springs 26. The arms 12 are adjustable axially along the shaft 10 and are locked in position by screwed blocks engaging a longitudinal groove in shaft 10, and the arms 11 are pressed by springs 14 into positions controlled by the engagement of extensions of the. arms with screws 16, which can be adjusted to ensure that all the rollers 7 come into action simultaneously ...

PAPER FEED APPARATUS

SHEET FEEDING MACHINES

A DEVICE FOR FEEDING DOCUMENTS

Improvements in or relating to Compressible Rollers for Sheet Material Handling Apparatus and the like

... 1,190,318. Rollers; feeding sheets. D. O'RIODAIN. 13 Aug., 1968 [18 Aug., 1967], No. 38723/68. Heading B8R. [Also in Division F2] A composite compressible roller, for use in a machine handling sheets of polystyrene ceiling or wall tiles, comprises a cylinder 3 of foamed polyurethane surrounding and fast with an internal hollow steel shaft 2 which is supported on and rotatable with a coaxial solid steel centre shaft 1, the composite roller having a diameter which is approximately three times the diameter of the internal hollow shaft 2. The foamed polyurethane has a density of 40 kilograms per cubic metre, a degree of compression equal to 25% of the uncompressed thickness of the material under an applied pressure of 18À3 pounds per square inch, and a tensile strength of 25 pounds per square inch. The density may be such that an applied pressure in the range of 15 to 30 pounds per square inch will achieve a compressibility of 25%. Power driven pairs of such rollers 10, 11 are used in a machine ...

AN OFFICE MACHINE PAPER GUIDE AND TRANSPORT DEVICE

FEEDING SHEETS INTO A COPIER

Improvements in feed mechanism for printing and like machines

... 166,453. Waite, F., and Waite & Saville, Ltd. July 23, 1920. Dropping-roller and like sheet feeds; sheet carriers and separators.-Sheet-feeding mechanism of the kind in which the: sheets are separated by a pneumatic separator and are fed by tapes or bands carried by oscillating arms which canse the sheets to be gripped between the tapes and fixed bowls or pulleys, is .constructed so that the tapes 3 pass over pulleys 2 which are supported by adjustable brackets 12 carried by a cross-bar 10 mounted on a pair of oscillating arms 9 on a shaft 6. To ensure accurate feeding of the sheets, the pulleys 2 are constructed so that the tapes 3 pass over portions a of the pulley which are separate from the portions b which engage the fixed bowls or rollers 5 frictionally when the arms 3 are raised after the separation of a sheet by a suction separator. To mount the pulleys 2, they are formed with recesses c, d which receive a projection g on a pin 14, and a boss 12a on the bracket 12 respectively.

DEVICE TO THE REPEATING ONE WOULD DRIVE PAST A COPYING COLLECTING MAIN AT AN OPTICAL SCANNING MECHANISM

VORRICHTUNG ZUM REPETIERENDEN VORBEIFUEHREN EINER KOPIERVORLAGE AN EINER OPTISCHEN ABTAST- EINRICHTUNG

PROCEDURE FOR THE SEPARATION OF A PRINTING MEDIA SHEET FROM A SHEET PILE

TRANSPORTEINRICHTUNG ZUR UEBERFUEHRUNG VON BOGEN ZWISCHEN ZWEI DRUCKWERKEN IENER KOMBINIERTEN DRUCKMASCHINE

TRANSPORT EQUIPMENT FOR THE TRANSFER OF SHEET BETWEEN TWO PRINTING ELEMENTS IENER COMBINED PRINTER

AUTOMATIC PAPER FEEDING DEVICE

RECORDING DEVICE

ORIENTATION AND PINCHROLL FROM FLEXIBLE MATERIAL.

BALL EDITION IN A PROMOTION DEVICE FOR PAPER SHEET.

TRANSITION REGION FUER MICROFILM CARDS.

SHEET FEEDING DEVICE

DEVICE FOR SUPPLYING FLATTENING MATERIALS

PROCEDURE FOR STEERING A SHEET TRANSPORTING EQUIPMENT AND A PROCEDURE FOR STEERING A RECORDING DEVICE

DEVICE FOR FORMING A SHEET STREAM OF ITSELF SHED-WELL-BEHAVED PARTIAL COVERING SHEET

CREASE ROLLER STORAGE

DEVICE FOR ISOLATING PIECES OF LAUNDRY

DEVICE FOR THE PROCESSING OF SECURITY-SIMILAR ARTICLES

PINCHROLLS, COMPRESSOR RODS AND TRANSPORT SYSTEM FOR FLAT MERCHANDISE

DEVICE FOR THE PROMOTION OF FLATTENING THES SUBJECT OF MEANS OF A SYNCHRONIZATION SYSTEM

SHEET PROMOTION APPARATUS

COMPOSITION FOR THE PRODUCTION OF CONDUCTIVITY AND NICHTKLEBRIGKEIT, THIS USING COLOR AND SCOOTERS

Paper Sheet Feeding Unit

A paper sheet feeding unit includes: a plurality of feed rollers; a plurality of gate rollers respectively disposed opposite to the plurality of feed rollers in a one-to-one relationship; a biasing member that biases the plurality of gate rollers individually in a direction of the plurality of feed rollers; and a supporting member that supports the plurality of gate rollers and the biasing member. 43a 41 37a 42 r 32a 1M\ f 36a z 23a 35a ...

Slit sheet tensioning device

An expansion device includes an unexpanded slit sheet roil that is wound on a paper core that is longer than the width of the silt sheet paper roil, The paper core is placed onto a rod member. An adjustable downward pressure is exerted on the paper core and the paper core exerts pressure on the rod member. As the paper is pulled, the downward pressure creates the friction required to enable the unexpanded slit sheet to be unwind and fed while simultaneously expanding.

BANKNOTE CONVEYOR

Feeder for feeding document to document imaging system and method for feeding documents

A method and apparatus for processing documents are provided. The apparatus includes a feeder for receiving a packet of a plurality of documents and separating the documents to serially feed the documents to a scanner. A retard adjacent the feeder is operable in first and second positions. In the first position the retard forms a nip with the feeder so that the retard is operable to impede the progress of one or more documents in the packet while the feeder feeds one of the documents in the packet. In the second position, the retard is spaced apart from the feeder to form a gap between the feeder and the retard. The system further includes a sensor for detecting a characteristic of the documents in a packet indicative of whether the number of documents in the packet exceeds a predetermined threshold. A drive mechanism automatically drives the retard pad between the first and second positions in response to the detected characteristic.

CONVEYING SHEETS BETWEEN TWO PRINTING UNITS

Device for conveying flat objects with a synchronization system

Sheet conveying apparatus and image forming apparatus

A sheet conveying apparatus includes a conveying portion which conveys a sheet, a lever which is pushed by the sheet conveyed by the conveying portion, and moves from a standby position, a detecting portion which generates a signal corresponding to a position of the lever, and generates a first signal when the lever moves in a first moving area from the standby position to a predetermined position and generates a second signal when the lever moves in a second moving area beyond the predetermined position, and a biasing portion which does not apply to the lever a biasing force when the lever is in the first moving area, and applies to the lever a biasing force opposite in a direction in which the lever is pushed by the sheet and moves when the lever is in the second moving area.

Image forming device

An image forming device, comprising: a sheet-like medium accommodation unit; a supply member that carries a sheet-like medium; a pair of separation members that separate the sheet-like medium one by one; an image formation unit; a carrying path; a re-carrying unit to move inversely the sheet-like medium whose top face has been subjected to printing; a moving mechanism to move the supply member close to or away from the sheet-like medium and to move the pair of separation members close to or away from each other so that a path for the inversely carried sheet-like medium is formed; and a control unit to control the moving mechanism such that, when back-face printing is performed, the supply member is in a state of being moved away from the sheet-like medium and the pair of separation members are in a state of being moved away from each other.

Image recording apparatus

An image recording apparatus including: (a) a recording portion for recording image on a top face of a sheet; (b) a supplying roller which is to be in contact with a bottom face of the sheet held in a tray and which is configured to supply the sheet toward a curved conveyance path; (c) a drive roller which is to be in contact with the top face of the sheet and which is configured to convey the sheet supplied from the supplying roller; and (d) a controlling portion which is configured, upon receipt of a command requesting start of conveyance of the sheet, to cause the supplying roller to be rotated without causing the drive roller to be rotated, and is configured, upon judgment that a leading end portion of the sheet has reached a flat surface extending away from the drive roller toward the recording portion, to cause the drive roller to be rotated.

Sheet feeding device

A sheet feeding device includes a first roller configured to feed a sheet in a first direction along a first feed path, a second roller arranged on a downstream side of the first roller and configured to feed the sheet in the first direction along the first feed path, a sheet detection unit arranged between the first roller and the second roller. A rotation amount of the second roller from detection of the leading end of the sheet by the sheet detection unit to arrival of the sheet at a predetermined position on the downstream side is compensated based on the rotation speed of the first roller within a first period, which is a period from start of feeding of the sheet as the first roller is started to be driven to the detection of the leading end of the sheet by the sheet detection unit.

Sheet transport apparatus

A sheet transport apparatus for transporting a sheet along a transport path has a sheet transport mechanism having a plurality of transport rollers that transports a sheet, and a jam clearing mechanism to remove a sheet which causes a transport failure and is jammed on the transport path. The jam clearing mechanism has a coupling member coupled to a transport roller, a jam clearing dial that transfers a rotation force to the transport roller via the coupling member, and a switching device for switching so that the coupling member separates from the transport roller in transporting a sheet, while being coupled to the transport roller in clearing a jam.

Transmission device for scanner

A transmission device for a scanner includes a driving member, two worms, two rollers, and two worm wheels. The driving member is disposed on a housing base, and includes a main body and an output shaft. The output shaft has two ends disposed respectively at two opposite sides of the main body. The worms are connected respectively and fixedly to the two ends of the output shaft. The rollers are disposed rotatably on the housing base. The worm wheels are connected respectively and fixedly to the rollers, and mesh respectively with the worms.

Sheet conveying device

A sheet conveying device includes a cover member made of resin and partially defining a conveying path, a roller member rotatably disposed on the cover member and configured to convey a sheet along the conveying path, an urging member disposed between the cover member and a rotary shaft of the roller member and urging the roller member toward the conveying path while one end of the urging member contacts the rotary shaft, and a plate member made of metal and disposed between the cover member and the urging member. The plate member includes a first segment extending along the cover member and contacting the other end of the urging member, a second segment extending from an edge of the first segment in a direction toward the conveying path, and a third segment extending from an edge of the second segment in a direction different from the second segment extending direction.

Sheet conveying apparatus and image forming apparatus

A sheet conveying apparatus includes a conveying roller which conveys a sheet, a cylindrical motor which drives the conveying roller, an outer diameter of the motor being approximately equal to or smaller than an outer diameter of the conveying roller, and a supporting portion which supports the motor such that a rotational center of the motor is arranged coaxially with a rotational center of a rotational shaft of the conveying roller the motor is positioned within a maximum sheet that can be conveyed by the conveying roller in a width direction perpendicular to the sheet conveying direction.

Image forming system, image forming method, and non-transitory computer readable medium

An image forming system includes an image forming unit, a feeding unit, a side edge reversal unit, a leading edge reversal unit, and a control unit, wherein, when there is a request for image formation on a bundle of sheets including a special sheet having a special part at an edge so that the edge is not straight and there is a request for image formation on both surfaces of the special sheet, the control unit controls the feeding unit, the image forming unit, the side edge reversal unit, the image forming unit to transport the special sheet having the image of the preceding page formed thereon to the downstream side after the front and back of the sheet are reversed by the leading edge reversal unit.

Pickup arm

A pickup arm for print media arranged to engage a roller.

Conveying apparatus and image forming apparatus

A conveying apparatus includes a first pair of rollers having a drive roller and a pinch roller driven by the drive roller, a second pair of rollers provided downstream of the first pair of rollers, and an arm member supporting the drive roller and adapted to be swingable such that a force for pressing the drive roller against the pinch roller increases as a conveyance resistance of the sheet increases. The force for pressing the drive roller against the pinch roller decreases if driven by the moving sheet. The conveying speed of the second pair of rollers is set to be higher than the conveying speed of the drive roller so as to cause the drive roller to be driven by the sheet in the case where a skew of the sheet has been corrected and the sheet having the skew corrected is conveyed by the second pair of rollers.

Conveying apparatus and recording apparatus

A conveying apparatus including a conveying path with a curved path through which a sheet is passed, a main conveying roller provided downstream of the conveying path in a conveying direction of the sheet, the roller being rotated in a first direction to perform a conveying operation of conveying the sheet in the conveying direction and being rotated in a second direction opposite to the first direction to perform an skew correcting operation of forming a loop of the sheet, and an auxiliary guide member which supports the sheet using an inner side of a curvature of the conveying path and which is tilted toward the conveying direction side during the conveying operation when subjected to a force of the sheet which is stronger than during the skew correcting operation.

Image forming apparatus and rotation control method for motor driving rotation of timing rollers

An image forming apparatus having a transport device including a pair of timing rollers, operable to cause a leading edge of a recording sheet to abut a nip portion of the non-rotating timing rollers, and then initiate rotation to transport the sheet toward a transfer position, the transport device comprising: a motor transmitting rotational force to the timing rollers via a power transmission mechanism such that the timing rollers rotate; and a control unit controlling motor rotation, wherein the control unit activates the motor, causes the timing rollers to transport a first recording sheet at a first speed, and stops the motor once transportation is complete, and when a second recording sheet is to be subsequently transported at a different second speed, the control unit causes the timing rollers to execute an idle rotation at the second speed or at another speed, and then stopping, before beginning second sheet transportation.

Sheet feeder and image forming apparatus

In a sheet feeder comprising a pair of sheet feeding units and an image forming apparatus comprising the sheet feeder according to the present invention, a feed roller of a first sheet feeding unit of the pair of sheet feeding units is driven to rotate when a driving source of the first sheet feeding unit rotates in the forward direction, and a conveying roller of a second sheet feeding unit of the pair of sheet feeding units is driven to rotate when the driving source of the first sheet feeding unit rotates in the backward direction.

Image Reader and Sheet Feeding Device

An image reader may include a shaft, a roller, a guide, and a first side plate comprising a frame portion having a first frame portion, a pair of second frame portions, and a third frame portion connecting with the pair of second frame portions and a first hole surrounded by the frame portion. A first bearing member may be fitted in the first hole and include a bearing portion contacting the first frame portion. The first bearing member may be configured such that an end of the shaft is rotatably held. An engaged portion may extend from the bearing portion and include an engagement portion engaged with the first side plate. The image reader may further include a second side plate, a second bearing member disposed at the second side plate and configured such that the opposite side of the shaft is rotatably held, and a reading unit. 1. An image reader comprising:a shaft;a roller mounted on the shaft, the roller being configured to rotate on the shaft and feed a sheet;a guide having an opening at which the roller is disposed;a first side plate disposed on one side of the guide in an axial direction of the shaft, wherein the first side plate comprises a frame portion and a first hole, wherein the frame portion comprises a first frame portion, a pair of second frame portions and a third frame portion, wherein the pair of second frame portions extends from the first frame portion in an extending direction perpendicular to the axial direction, wherein the third frame portion connects with the pair of second frame portions, wherein the first hole is surrounded by the frame portion, and wherein the one side of the shaft is inserted into the first hole;a first bearing member fitted in the first hole, wherein the first bearing member comprises a bearing portion and an engaged portion, wherein the bearing portion contacts the first frame portion and is configured such that an end of the shaft is rotatably held, wherein the engaged portion extends in the extending direction from ...

SHEET FEEDING DEVICE

A sheet feeding device includes a separation roller, a first conveyance roller arranged on a downstream side of the separation roller and conveys the sheet separated by the separation roller, a second conveyance roller further conveys the sheet conveyed by the first conveyance roller, wherein the separation roller and the first conveyance roller are driven exclusively of each other by a first motor, and a control unit controls such that, when a trailing edge of a sheet passes through the separation roller while the sheet is being conveyed by the first conveyance roller and the second conveyance roller, the first motor makes a conveyance speed of the first conveyance roller higher than the conveyance speed thereof before the trailing edge of the sheet passes through the separation roller, and that, when the trailing edge of the sheet passes through the first conveyance roller, the first motor drives the separation roller. 1. A sheet feeding device comprising:a feeding tray configured to stack thereon a plurality of sheets to be fed;a separation roller configured to separate the plurality of sheets stacked on the feeding tray one by one;a first conveyance roller arranged on a downstream side of the separation roller in a sheet conveyance direction and configured to convey a sheet separated by the separation roller;a first motor configured to drive the separation roller and the first conveyance roller independently of each other;a second conveyance roller configured to be driven by a second motor different from the first motor, arranged on the downstream side of the first conveyance roller, and configured to further convey the sheet conveyed by the first conveyance roller; anda control unit configured to control the first motor such that, when a trailing edge of the sheet passes through the separation roller while the sheet is being conveyed by the first conveyance roller and the second conveyance roller, the first motor makes a conveyance speed of the first conveyance ...

Transported material transporting device and image processing apparatus

A transported material transporting device including: a power transmission switching mechanism configured to switch the transmission of the power between the intermediate gear and the cam drive gear between a transmitted state and a blocked state; a detection lever provided in the reversing path and configured to detect the presence or absence of the material to be transported which enters the reversing path; and a blocked-state locking mechanism configured to lock the blocked state of the power transmission switching mechanism when the discharging roller is in the released state, wherein the locked state of the blocked-state locking mechanism is released and the power transmission switching mechanism is switched from the blocked state to the transmitted state upon detection of the position of the trailing end of the material to be transported entering the reversing path by the detection lever.

MEDIUM FEEDING DEVICE AND RECORDING APPARATUS

A medium feeding device includes a first feeding unit feeds the medium to be fed to a downstream side of a feeding direction. A second feeding unit then feeds the medium to a upstream side and a downstream side on the basis of a feeding direction of the first feeding unit. A friction member is positioned opposite to the first feeding unit. A displacement member converts between a first state in which the displacement member protrudes upwardly in a stacked direction with respect to the friction member and a second state in which the displacement member retracts downwardly. The displacement member is set as the second state when one remaining sheet of the medium is fed to the downstream side by the first feeding unit, and the displacement member is set as the first state when a trailing end of the one remaining sheet passes through the friction member. 1. A medium feeding device comprising:a placing plane on which a medium to be fed is placed;a first feeding unit which feeds the medium to be fed which is placed on the placing plane to a downstream side of a feeding direction;a second feeding unit which feeds the medium fed by the first feeding unit to a upstream side and a downstream side of the feeding direction on the basis of a feeding direction of the first feeding unit;a friction member which is installed at a position of the placing plane which is opposite to the first feeding unit; anda displacement member which is able to be converted between a first state in which the displacement member protrudes upwardly in a stacked direction of the medium to be fed with respect to the friction member and a second state in which the displacement member retracts downwardly in the stacked direction with respect to the friction member,wherein the displacement member is set as the second state when one remaining sheet of medium to be fed placed on the placing plane is fed to the downstream side of the feeding direction by the first feeding unit, andthe displacement member is ...

IMAGE FORMING APPARATUS

To simplify control of a sheet feeing/conveying system while preventing a step-out phenomenon, saving power, and reducing cost, provided is an image forming apparatus which detects a load angle of a motor (M) associated with conveying of an n-th sheet (P) (where n is a natural number equal to or larger than 1). In accordance with the detected load angle, current values for motors (M and M) associated with conveying of the n-th sheet (P), a current value for a motor (M) associated with feeding of sheets (P) following the n-th sheet, and a current value for a motor (M) associated with conveying of the sheets (P) following the n-th sheet are set. Such control is executed when power is turned ON or the like. 1. An image forming apparatus for forming an image on a sheet material comprising:a conveying unit having a plurality of conveying paths, configured to convey the sheet material;a plurality of first motors configured to drive a plurality of first rollers, each of which is disposed on a respective conveying path of the plurality of conveying paths;a second motor configured to drive a second roller disposed downstream of a merging point of the plurality of conveying paths;a detection unit configured to detect a load angle of the second motor; and{'b': '1', 'a setting unit configured to set, in accordance with the load angle of the second motor detected by the detection unit at a time of conveying, an n-th sheet material, where n is a natural number equal to or larger than , current values for the plurality of first motors and the second motor at a time of conveying sheet material following the n-th sheet material.'}2. An image forming apparatus according to claim 1 , further comprising a third motor configured to drive a third roller disposed downstream of the second roller claim 1 ,wherein, in accordance with the load angle of the second motor detected by the detection unit at the time of conveying the n-th sheet material, the setting unit sets a current value for ...

IMAGE FORMING APPARATUS

To simplify control of a sheet feeding/conveying system while preventing a step-out phenomenon and saving power, provided is an image forming apparatus which detects a load angle of a first motor (M) for conveying an n-th sheet (P) (where n is a natural number equal to or larger than 1). In accordance with the detected load angle, a current value for the first motor (M) for conveying sheets (P) following the n-th sheet and a current value for a second motor (M) for conveying the n-th and subsequent sheets (P) are set. Such control is executed when power is turned ON or the like. 1. An image forming apparatus , comprising:a first motor configured to drive a first roller disposed in a conveying path,a second motor configured to drive a second roller disposed downstream of the first roller in the conveying path,a control unit configured to control driving of the first motor and the second motor; anda detection unit configured to detect a load angle of the first motor,wherein the control unit sets a current value for the first motor for conveying an n-th sheet material, where n is a natural number greater than or equal to 1, to a predetermined current value, and sets, in accordance with the load angle of the first motor detected by the detection unit in conveyance of the n-th sheet material, a current value for the first motor for conveying sheet materials following the n-th sheet material and a current value for the second motor for conveying the n-th sheet material and subsequent sheet materials.2. An image forming apparatus according to claim 1 , wherein the control unit sets a current value for the first motor for conveying sheet materials up to an m-th sheet material claim 1 , where m is a natural number such that m>n claim 1 , to the predetermined current value claim 1 , in place of the current value for the first motor for conveying the n-th sheet material claim 1 , in accordance with the load angle of the first motor detected by the detection unit in conveyance ...

MULTI-FUNCTION PERIPHERAL

A multi-function peripheral having an automatic document feeding device (ADF) suited for being configured in a body of an apparatus is provided. The apparatus has a first and second power sources to drive the ADF to transmit a paper in or out of the body. The ADF includes a limiting structure, a swinging member and a blocking member. The first and second power sources drive the limiting structure and the swinging member to swing respectively. The blocking member has a first end connected to the swinging member and a second end extending toward the limiting structure. When the limiting structure is at a second position and the swinging member swings toward a third position, the second end is trapped into the limiting space. When the limiting structure moves toward a first position and the swinging member swings toward the third position, the second end escapes from the limiting space. 1. A multi-function peripheral , comprising:a body, having a paper inlet and a paper outlet, a paper is adapted to be transmitted into the body via the paper inlet and transmitted out of the body via the paper outlet;a motor, disposed in the body;an electromagnetic valve, disposed in the body; a limiting structure, pivoted to the body and connected to the electromagnetic valve, the electromagnetic valve driving the limiting structure to move between a first position and a second position, the limiting structure having a limiting space;', 'a swinging member, pivoted to the body;', 'a gear set, disposed on the swinging member and connected to the motor, the motor driving the gear set so as to drive the swinging member to move between a third position and a fourth position;', 'a blocking member, having a first end and a second end opposing thereto, the first end connected to the swinging member so that the blocking member moves along with the swinging member, the second end extending from the swinging member to the limiting structure, wherein a moving path of the second end and a moving ...

SHEET THICKNESS DETECTING DEVICE, FEEDING DEVICE, AND IMAGE FORMING APPARATUS

A sheet thickness detecting device for detecting a thickness of a sheet includes a fixed roller rotatably supported by a shaft so that the fixed roller faces the sheet; a movable roller rotatably provided so that the movable roller and the fixed roller sandwich and feed the sheet, and configured to be displaced in accordance with the thickness of the sandwiched sheet; a swing member rotatably supporting the movable roller and including a shaft so that the swing member is swung around the shaft, wherein the swing member further includes a detection target part formed in a manner that a distance between the detection target part and the shaft is greater than that between a position where the movable roller is supported by the swing member and the shaft; and a detecting unit detecting the displacement amount of the detection target part of the swing member. 1. A sheet thickness detecting device for detecting a thickness of a sheet passing through a conveying path , comprising:a fixed roller rotatably supported by a shaft so that the fixed roller faces one side of the sheet passing through the conveying path;a movable roller rotatably provided so that the movable roller and the fixed roller sandwich and feed the sheet, and configured to be displaced in accordance with the thickness of the sandwiched sheet;a swing member configured to rotatably support the movable roller and including a shaft so that the swing member is swung around the shaft, wherein the swing member further includes a detection target part formed in a manner that a distance between the detection target part and the shaft is greater than a distance between a position where the movable roller is supported by the swing member and the shaft; anda detecting unit configured to detect the displacement amount of the detection target part of the swing member.2. The sheet thickness detecting device according to claim 1 , further comprising:a shaft roller including the shaft disposed on the upstream side of a ...

Sheet Feed Timing

An apparatus may be configured to: upon feeding a sheet by a roller, wait for a sheet waiting interval before feeding a next sheet by the roller, determine, using a sensor downstream from the roller in a sheet feeding path, a sensed sheet interval between at least two of the fed sheets; determine whether the sensed sheet interval is equal to or greater than a reference value; and in response to determining that the sensed sheet interval is equal to or greater than the reference value, reduce the sheet feed waiting interval for subsequent feeding of at least one sheet. 1. An apparatus , configured to:upon feeding a sheet by a roller, wait for a sheet feed waiting interval before feeding a next sheet by the roller;determine, using a sensor downstream from the roller in a sheet feeding path, a sensed sheet interval between at least two of the fed sheets;determine whether the sensed sheet interval is equal to or greater than a reference value; andin response to determining that the sensed sheet interval is equal to or greater than the reference value, reduce the sheet feed waiting interval for subsequent feeding of at least one sheet.2. The apparatus according to claim 1 , wherein the apparatus is configured to reset the sheet feed waiting interval to an initial value after the subsequent feeding of at least one sheet is finished.3. The apparatus of claim 1 , further configured to:determine the sensed sheet interval using a plurality of sensed intervals between successive fed sheets.4. The apparatus according to claim 3 , further configured to determine the sensed sheet interval based on the plurality of sensed sheet intervals after discarding a maximum and a minimum sheet interval.5. The apparatus according to claim 3 , further configured to determine the sensed sheet interval claim 3 , every time the sensor detects a second sheet following a first sheet.6. The apparatus according to claim 3 , wherein the apparatus is configured to reset the sheet feed waiting interval ...

AUTO DOCUMENT FEEDER AND A DOCUMENT READER WITH THE AUTO DOCUMENT FEEDER

An auto document feeder includes a lead path, a first reverse path, a second reverse path, and a both surfaces eject path. The lead path guides a document from a left side to a right side of a read position. The first and second reverse paths are connected to the lead path, and reverse the document to guide the document from the right side to the left side of the read position. A both surfaces eject path is connected to the first and second reverse paths and guides the document whose image information of a second surface has been read to eject further to the right side than the read position. A shared curve path shared by the lead path and the both surfaces eject path includes a portion between the read position and a portion in which a lead curve path protrudes the most. 1. An auto document feeder comprising:a lead path arranged to guide a document supplied from a first side of a read position to a second side thereof so as to read a first surface of the document;a reverse path connected to the lead path and arranged to reverse the document whose image information of the first surface has been read, and to guide the document from the second side of the read position to the first side thereof so as to read a second surface of the document; andan eject path connected to the reverse path and arranged to guide the document whose image information of the second surface has been read, so as to eject the document further to the second side than the read position; wherein a first reverse path arranged to guide the document when a length of the document is relatively short; and', 'a second reverse path arranged to guide the document when the length of the document is relatively long;, 'the reverse path includesthe first reverse path includes a first mid-reverse path, which protrudes to the second side and is arranged further to the second side than the read position; andthe second reverse path includes a second mid-reverse path, which protrudes to the second side beyond the ...

SHEET FEEDING UNIT AND IMAGE FORMING APPARATUS

A feeding roller, a drive motor configured to drive the feeding roller, a control unit configured to perform one rotation control on the feeding roller, a sheet feeding path curved immediately after the feeding roller, a conveying roller pair provided in the sheet feeding path, and being set to a sheet conveyance speed higher than that of the feeding roller so as to eliminate a loop formed when a sheet passes through the sheet feeding path during one rotation control of the feeding roller; and a ratchet mechanism configured to stop the driving force from the drive motor and cause the feeding roller to be rotated by the sheet conveyed by the conveying roller pair when the feeding roller is pulled by the sheet being conveyed by the conveying roller pair in the course of the one rotation control of the feeding roller are provided. 1. A sheet feeding unit comprising:a feeding roller configured to feed a sheet;a drive motor configured to drive the feeding roller;a driving force transmission mechanism configured to transmit a driving force from the drive motor to the feeding roller;a one rotation control mechanism configured to control the rotation of the feeding roller;a curved sheet feeding path downstream of the feeding roller in the sheet feeding direction;a conveying roller provided in the sheet feeding path set to a sheet conveyance speed greater than that of the feeding roller to eliminate a loop formed when the sheet fed by the feeding roller is passing through the sheet feeding path during the one rotation control of the feeding roller, and configured to receive the sheet fed from the feeding roller and conveying the received sheet; anda one-way rotation control mechanism configured to stop the driving force and cause the feeding roller to be rotated by the sheet conveyed by the conveying roller when the feeding roller is pulled by the sheet being conveyed by the conveying roller in the course of the one rotation control of the feeding roller.2. The sheet feeding ...

IMAGE FORMING APPARATUS

A supporting portion is provided to project from an upper surface of a side regulating member which is provided in a sheet feeding cassette which is detachably attached to a color laser beam printer body, and which regulates a position of a sheet in a width direction orthogonal to a sheet feeding direction, and this supporting portion regulates downward deformation of a conveyance guiding member which is positioned above the sheet feeding cassette and which forms a sheet conveying path R which guides the sheet. 1. An image forming apparatus comprising;a sheet storage portion which is detachably attached to an apparatus body;a guiding member which is positioned above the sheet storage portion attached to the apparatus body and which forms a sheet conveying path which guides a sheet; anda regulating portion which is provided in the sheet storage portion, and which regulates a position of the sheet in a width direction orthogonal to a sheet feeding direction, and abuts on the guiding member and regulates downward deformation of the guiding member.2. The image forming apparatus according to claim 1 , wherein the regulating portion abuts on a bottom surface of the guiding member when the sheet storage portion is attached to the apparatus body.3. The image forming apparatus according to claim 1 , wherein the regulating portion abuts on a bottom surface of the guiding member when the guiding member deforms downward a predetermined amount.4. The image forming apparatus according to claim 1 , wherein a convex portion which abuts on the regulating portion and extends in the width direction is provided on a bottom surface of the guiding member.5. The image forming apparatus according to claim 1 , wherein a convex portion which abuts on the regulating portion is provided in a center portion of a bottom surface of the guiding member in the width direction.6. The image forming apparatus according to claim 1 , wherein the regulating portion includes a regulating member which ...

IMAGE RECORDING DEVICE

A first frame includes a pair of first roller-receiving portions which rotatably supports a convey roller. A second frame is attached to the first frame and includes an extending portion which extends beyond one of the first roller-receiving portions toward one side of the convey roller in its axial direction. A third frame includes a base portion, and a first side wall and a second side wall which are opposite to each other. The first and second side walls are attached to the extending portion so as to he perpendicular to the axial direction of the convey roller. The first side wall is disposed more toward the one side of the convey roller in the axial direction than the second side wall and includes a portion which receives a shaft of a motor for the convey roller, and a second roller-receiving portion which rotatably supports the convey roller. 1. An image recording device comprising:a motor;a convey roller to which a driving force is transmitted from the motor and which is configured to convey a sheet in a conveying direction;a recording unit disposed downstream of the convey roller in the conveying direction and configured to record an image on the sheet;a first frame comprising a pair of first roller-receiving portions which rotatably supports the convey roller;a second frame attached to the first frame and comprising an extending portion which extends beyond one of the pair of the first roller-receiving portions toward one side of the convey roller in an axial direction of the convey roller; anda third frame attached to the extending portion of the second frame and comprising a base portion, a first side wall continuing from the base portion, and a second side wall continuing from the base portion and opposite to the first side wall,wherein the first side wall and the second side wall are attached to the extending portion of the second frame such that the first side wall and the second side wall are perpendicular to the axial direction of the convey roller, ...

MEDIUM CONVEYING APPARATUS, IMAGE FORMING APPARATUS, AND MEDIUM CONVEYING SYSTEM

A medium conveying apparatus includes a conveying unit including two rotating members for conveying a medium therebetween, a driving unit configured to drive a rotation of at least one of the rotating members, a parameter calculating unit configured to calculate a parameter of the driving unit, and a medium detecting unit configured to detect the medium conveyed by the rotating members by comparing the parameter calculated by the parameter calculating unit when the medium is conveyed by the rotating members and a reference parameter calculated by the parameter calculating unit when the medium is not conveyed by the rotating members. 1. A medium conveying apparatus comprising:a conveying unit including two rotating members for conveying a medium therebetween;a driving unit configured to drive a rotation of at least one of the rotating members;a parameter calculating unit configured to calculate a parameter of the driving unit; anda medium detecting unit configured to detect the medium conveyed by the rotating members by comparing the parameter calculated by the parameter calculating unit when the medium is conveyed by the rotating members and a reference parameter calculated by the parameter calculating unit when the medium is not conveyed by the rotating members.2. The medium conveying apparatus as claimed in claim 1 ,wherein the parameter calculated by the parameter calculating unit includes a torque of the driving unit,wherein the reference parameter calculated by the parameter calculating unit includes a reference torque.3. The medium conveying apparatus as claimed in claim 2 , further comprising:a time estimating unit configured to estimate when the medium passes an area between the rotating members; anda conveying status detecting unit configured to determine a conveying status of the medium;wherein the conveying status detecting unit is configured to determine that the conveying status is a failure when the medium detecting unit does not detect the medium at ...

PILLOW BLOCK FOR FEED ROLLER, AND FEEDING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE PROCESSING APPARATUS USING THE PILLOW BLOCK

A pillow block supporting a feed roller includes a pillow block main body; a wedge body adjusting a height position of the pillow block main body; and a bracket adjustably installing the pillow block main body in a sheet feeding direction on a mounting surface. Further, the pillow block main body includes a reception part to support the feed roller, a concave part though which the wedge body is inserted, and the bracket is temporarily fixed to the mounting surface. Further, the wedge body pushes up the height position of the pillow block main body upon being inserted into the concave part to determine the position of the reception part so that the reception part supports the feed roller from below. 1. A pillow block to be installed to fit with a feed roller , which feeds a recording medium , to support the feed roller , the pillow block comprising:a pillow block main body;a wedge body configured to adjust a height position of the pillow block main body; anda bracket configured to adjustably install the pillow block main body in a recording medium feeding direction on a mounting surface on which the pillow block is to be mounted,wherein the pillow block main body includes a reception part that is disposed on an upper part of the pillow block main body and is open on an upper side thereof so as to support the feed roller,wherein the pillow block main body further includes a concave part, so that the wedge body is inserted into the concave part,wherein the bracket is configured to be temporarily fixed to the mounting surface in a manner such that the position of the bracket in the recording medium feeding direction is adjustable, andwherein the wedge body is configured to push up the height position of the pillow block main body upon being inserted into the concave part to determine the position of the reception part so that the reception part supports the feed roller from below.2. The pillow block according to claim 1 ,wherein the concave part includes an inclined ...

INFORMATION RECORDING DEVICE

Provided is an information recording device in which jam processing operation can be easily performed with simple operation when a recording medium such as a card is jammed in a conveyance passage. A card storing section and a medium conveyance passage for conveying a card to an image forming section are arranged in a housing at upper and lower sides and a passage open-close member for removing a card jammed at the image forming section is arranged therebetween. Then, electronic information recording means is incorporated in the passage open-close member and a medium conveyance path which conveys a card toward the electronic information recording means is arranged on a medium introduction passage for feeding a card from the card storing section to the medium conveyance passage. According to the above, a card jammed at the image forming section or the information recording section can be easily removed to the outside of the device by opening the card storing section. 1. An information recording device which records electronic information and image information on a recording medium , comprising:a housing;a medium storing section which stores a recording medium;an information recording section which records electronic information on a recording medium;an image forming section which forms image information on a recording medium;a medium introduction passage which introduces a recording medium from the medium storing section toward the information recording section;a medium conveyance passage which conveys the recording medium conveyed from the medium introduction passage to the image forming section; anda passage open-close member which is arranged at the medium conveyance passage for removing a recording medium jammed at the image forming section,wherein the medium storing section, the passage open-close member, and the image forming section are arranged in the housing in this order, andthe information recording section includes electronic information recording means ...

Sheet Conveying Device

A sheet conveying device includes: a main body; a cover; a first roller; and a second roller. The main body defines a conveying passage along which a sheet is conveyed. The cover is supported to the main body and movable between a closed position in which the cover covers the main body from above and an open position in which the cover is moved upward from the main body so as to be spaced away from the main body. The first roller is rotatably supported to the cover and configured to discharge the sheet from the conveying passage to an outside of the main body. The second roller is rotatably supported to the main body and disposed in confrontation with the first roller while interposing the conveying passage between the first roller and the second roller when the cover is at the closed position.

Image Forming Apparatus

An image forming apparatus includes a main body, a recording sheet receiving portion configured to receive a recording sheet, an image forming portion configured to form an image on the recording sheet, a particular feed roller configured to feed the recording sheet toward the image forming portion, and a holding frame configured to rotatably support the particular feed roller such that the particular feed roller is exposed toward the recording sheet receiving portion. The holding frame has a roller receiving portion configured to receive the particular feed roller therein and a replacement opening for exposing the particular feed roller toward an opposite side of the holding frame relative to the recording sheet receiving portion. The particular feed roller is configured to be attached to and removed from the holding frame via the replacement opening on the opposite side of the holding frame relative to the recording sheet receiving portion. 1. An image forming apparatus comprising:a main body;a recording sheet receiving portion configured to receive a recording sheet;an image forming portion disposed in the main body and configured to form an image on the recording sheet;a particular feed roller configured to rotate in contact with the recording sheet received on the recording sheet receiving portion to feed the recording sheet toward the image forming portion; anda holding frame configured to rotatably support the particular feed roller such that the particular feed roller is exposed toward the recording sheet receiving portion,wherein the holding frame has a roller receiving portion configured to receive the particular feed roller therein and a replacement opening for exposing the particular feed roller toward an opposite side of the holding frame relative to the recording sheet receiving portion, andwherein the particular feed roller is configured to be attached to and removed from the holding frame via the replacement opening on the opposite side of the ...

IMAGE RECORDING APPARATUS

An image recording apparatus, including: a drive source foratable forwardly and reversely; a first roller rotatable in a first direction by the forward rotation of the drive source to convey a conveyed medium and rotatable in a second direction reverse to the first direction by the reverse rotation of the drive source; a recording device; a second roller; a first power transmitter which transmits a first-direction driving power to the second roller and not to transmit a second-direction driving power to the second roller, wherein the first-direction driving power is a rotational driving power of the first roller rotating in the first direction, and the second-direction driving power is a rotational driving power of the first roller rotating in the second direction; and a second power transmitter which transmits the second-direction driving power to the second roller and not to transmit the first-direction driving power to the second roller. 1. An image recording apparatus , comprising:a drive source configured to perform forward rotation and reverse rotation;a first roller rotatable in a first direction by the forward rotation of the drive source to convey a conveyed medium in a conveying direction, the first roller being rotatable in a second direction by the reverse rotation of the drive source, the second direction being reverse to the first direction;a recording device disposed downstream of the first roller in the conveying direction and configured to record an image on the conveyed medium;a second roller disposed downstream of the recording device in the conveying direction;a first power transmitter configured to transmit a first-direction driving power to the second roller and not to transmit a second-direction driving power to the second roller, wherein the first-direction driving power is a rotational driving power of the first roller rotating in the first direction, and the second-direction driving power is a rotational driving power of the first roller ...

CONVEYOR DEVICE

A conveyor device includes: a first conveyor having a first roller; a second conveyor having a second roller and disposed downstream of the first conveyor; and a storage storing first information and second information in which a velocity or a deceleration of the first and second rollers is less in the second information than in the first information. A controller executes: a first rotation processing in which, when a state in which a sheet is nipped by the first conveyor is kept during a next conveyance in intermittent conveyance, a first roller and a second roller are rotated according to the first information in the next conveyance; and a second rotation processing in which, when the state is not kept in the next conveyance, the first drive roller and the second drive roller are rotated according to the second information in the next conveyance. 1. A conveyor device , comprising:a drive source configured to produce: a first rotational driving power by a forward rotation of the drive source; and a second rotational driving power by a reverse rotation of the drive source;a first conveyor comprising a first drive roller and a first driven roller;a second conveyor disposed downstream of the first conveyor in a conveying direction, the second conveyor comprising a second drive roller and a second driven roller;a first power transmitter configured to transmit the first rotational driving power and the second rotational driving power to the first drive roller, the first power transmitter being configured to have the first conveyor convey the sheet in the conveying direction while nipping the sheet when the first rotational power is transmitted to the first drive roller, the first power transmitter being configured to have the first conveyor convey the sheet in a direction opposite the conveying direction when the second rotational power is transmitted to the first drive roller;a second power transmitter configured to transmit the first rotational driving power to the ...

CONTROL METHOD OF FEEDER AND IMAGE FORMING SYSTEM

When conveying an envelope, a posture of the envelope is corrected by hitting a closed portion of the envelope, which is opposite side of an opened portion of the envelope, against a nip portion between upper and lower rollers of the pre-registration rollers and the envelope is then conveyed with the envelope being nipped by the upper and lower rollers of the pre-registration, rollers. The upper and lower rollers of the pre-registration rollers nip the envelope to remove air from the envelope. When setting an envelope mode to control a conveying speed of the envelope based on a coverage rate of an image to be formed on the envelope, the conveying speed of the envelope is controlled by adjusting a rotation speed of the registration rollers based on the coverage rate of the set envelope mode. 1. A control method of a feeder including:a feeding portion which stores a sheet, of paper containing an envelope with a predetermined size and feeds the stored sheet of paper, the envelope containing an opened portion and a closed portion; anda pair of registration rollers containing an upper roller and a lower roller, each roller having a longitudinal length longer than a width of the fed sheet of paper, the registration rollers correcting a posture of the sheet of paper fed from the feeding portion to convey the sheet of paper toward a downstream side along a sheet-conveying direction,wherein, when conveying the envelope, the posture of the envelope is corrected by hitting the closed portion of the envelope, which is opposite side of the opened portion of the envelope, against a nip portion between the upper and lower rollers of the registration rollers and the envelope is then conveyed with the envelope being nipped by the upper and lower rollers of the registration rollers, the method comprising:a setting step of setting an envelope mode to control a conveying speed of the envelope based on a coverage rate of an image to be formed on the envelope; anda control step of ...

Sheet conveying device, sheet feed device and image forming apparatus having the same

A sheet sender 21 A includes a lift plate 21 P, a feed roller 21 B and a registration roller 23 . A biasing spring 21 S applies an upward force onto the lift plate 21 P. The lift plate 21 P is moved upward by eccentric cams 60 which are arranged at axial ends of the feed roller 21 B and rotationally driven by arm protrusions 211 which have come in contact with the eccentric cams 60 . A rotational driving force is transmitted to a feed gear 220 and a registration gear 231 from a main gear 70 to rotate the feed roller 21 B and the registration roller 23 . A gear of the main gear 70 that engages with the feed gear 220 is idly rotatable within a predetermined angle with respect to a gear that engages with the registration roller 23.

FEED ASSEMBLY AND IMAGE FORMING APPARATUS INCORPORATING FEED ASSEMBLY

A feed assembly configured to feed a sheet, including: a feed roller configured to convey the sheet; a support element configured to rotatably and detachably support the feed roller; a base including a guide surface configured to guide the sheet; a frictional element configured to generate a frictional force on the sheet guided by the guide surface; and an elastic member provided between the frictional element and the base; wherein a recess is defined in the guide surface to accommodate the frictional element; and the elastic member causes the frictional element to project from the guide surface when the feed roller is detached from the support element. 1. A feed assembly configured to feed a sheet , comprising:a feed roller configured to feed the sheet;a support element configured to support the feed roller detachably and rotatably;a base including a guide surface configured to guide the sheet; anda frictional element configured to apply a frictional force on the sheet guided by the guide surface; (i) a frictional piece configured to press the sheet against the feed roller,', '(ii) a main plate configured to support the frictional piece,', '(iii) an elastic member configured to bias the main plate toward the feed roller,', '(iv) a side plate configured to support the main plate rotatably, and', '(v) a backup plate configured to support the elastic member, wherein, 'wherein the frictional element includesthe guide surface is provided with a recess in which the frictional element is stored; andthe elastic member rotates the main plate with respect to the side plate so that the main plate protrudes from the guide surface and places the main plate in a position where the main plate is detachable from the base when the feed roller is removed from the support element.2. The feed assembly according to claim 1 , further comprising:a lift plate situated in an upstream side of the frictional element so as to push a leading edge of the sheet toward the feed roller; and ...

CYLINDRICAL SHAFT, TRANSPORT ROLLER, TRANSPORT UNIT, AND PRINTING APPARATUS

A cylindrical shaft is provided of which a pair of ends are formed in a cylindrical shape by a press work so as to form a joining portion therebetween. Here, the joining portion includes: a central linear section which is provided on a center portion in an axis direction of the cylindrical shaft and is formed in a linear shape to be parallel to the axis direction of the cylindrical shaft; and a folded section which includes a plurality of intersections which are provided on both ends of the center portion and are disposed so as to be extended in a direction perpendicular to the axis direction of the cylindrical shaft, and a connection linear section which connects ends of a pair of the adjacent intersections. In addition, the connection linear section is constituted by a first linear section which connects ends on one side of the pair of the intersections and a second linear section which connects ends on the other side of the pair of the intersections and formed shorter than the first linear section. In addition, a distance between the pair of the ends of the center portion is longer than a distance between the pair of the ends of the second linear section. 1. A printing apparatus comprising:a transport roller that includes a cylindrical shaft having a joint, the joint extending between one axial end of the cylindrical shaft and an opposite axial end of the cylindrical shaft; anda driven roller that nips a recording medium together with the transport roller and transports the recording medium together with the transport roller; anda recording unit for recording on the recording medium, a first joint extending along an axial direction in which the cylindrical shaft extends;', 'a projecting portion provided on one axial end side or an opposite axial end side than the first joint and extends in a direction cross-wise to the first joint,, 'wherein the joint further compriseswherein a spacing of the joint in the first joint is wider than a maximum spacing of the joint ...

SHEET TRANSPORT DEVICE AND IMAGE FORMING APPARATUS

A sheet transport device includes a shaft member that extends in an axial direction orthogonal to a sheet transport direction, and a roller that includes plural components which are assembled together so as to surround the shaft member. The components have a shape such that a joint between the components is formed on an outer peripheral surface of the roller which is formed by assembling the components together. The joint extends from one end to another end of the outer peripheral surface in the axial direction while bending or curving at least at a portion in the middle thereof. 1. A sheet transport device comprising:a shaft member that extends in an axial direction orthogonal to a sheet transport direction; anda roller that includes a plurality of components which are assembled together so as to surround the shaft member;wherein the components have a shape such that a joint between the components is formed on an outer peripheral surface of the roller which is formed by assembling the components together, the joint extending from one end to another end of the outer peripheral surface in the axial direction while bending or curving at least at a portion in the middle thereof.2. The sheet transport device according to claim 1 , wherein the joint has a shape that extends in the axial direction from the one end of the outer peripheral surface in the axial direction claim 1 , then extends in a circumferential direction of the outer peripheral surface claim 1 , and then extends in the axial direction to the other end.3. The sheet transport device according to claim 1 , wherein the roller is locked against rotation with respect to the shaft member.4. The sheet transport device according to claim 3 ,wherein, in the shaft member, recesses corresponding to the components and partial flat portions corresponding to the components are formed at an attachment position for the roller;wherein the components include protrusions to be inserted into the respective recesses, and flat ...

Printing medium conveying device and image forming apparatus

The present device includes a conveying path, a contact member coming in contact with the front of a printing medium to stop the conveyance of the medium, a hold member holding the front of the medium having contacted with the contact member, a first conveying unit conveying the medium so as to abut the contact member to form slack on the medium between itself and the hold member holding the medium, and a second conveying unit being provided nearer to the hold member than the first conveying unit in the conveying direction and conveying the medium so as to abut the contact member to form the slack. The second conveying unit is movable so that a part thereof existing on the side where the slack is formed on the medium in the conveying path is moved to the outside of the conveying path.

Multi-function peripheral with linking set

A multi-function peripheral having an automatic document feeding device (ADF) suited for being configured in a body of an apparatus is provided. The apparatus has a first and second power sources to drive the ADF to transmit a paper in or out of the body. The ADF includes a limiting structure, a swinging member and a blocking member. The first and second power sources drive the limiting structure and the swinging member to swing respectively. The blocking member has a first end connected to the swinging member and a second end extending toward the limiting structure. When the limiting structure is at a second position and the swinging member swings toward a third position, the second end is trapped into the limiting space. When the limiting structure moves toward a first position and the swinging member swings toward the third position, the second end escapes from the limiting space.

SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS PROVIDED WITH SAME

A sheet conveying apparatus includes a casing with an internal space, a sheet placing portion, a sheet feeding unit, a driving unit, an opening/closing cover and a drive switching unit. A sheet is to be placed on the sheet placing portion. The sheet feeding unit includes a sheet feeding member. The driving unit is arranged in the internal space and coupled to a rotational drive system of the sheet feeding member and transmits a rotational drive force to the sheet feeding member. The opening/closing cover is openably and closably arranged on the casing to cover a opening formed in the casing. The drive switching unit uncouples the driving unit and the sheet feeding member in association with a switching movement of the opening/closing cover from a closed state to the open state. The sheet feeding unit is mountable into and removable from the internal space through the opening. 1. A sheet conveying apparatus , comprising:a casing with an internal space;a sheet placing portion which is arranged in the internal space and on which a sheet is to be placed;a sheet feeding unit which is arranged in the internal space to face the sheet and includes a sheet feeding member having a rotational drive system for conveying the sheet in a predetermined direction by being driven and rotated;a driving unit which is arranged in the internal space and coupled to the rotational drive system of the sheet feeding member and transmits a rotational drive force to the sheet feeding member;an opening which is formed in the casing and exposes the sheet feeding unit to the outside of the casing;an opening/closing cover which is openably and closably arranged on the casing to cover the opening and exposes the sheet feeding unit in an open state; anda drive switching unit which uncouples the driving unit and the sheet feeding member in association with a switching movement of the opening/closing cover from a closed state to the open state;wherein the sheet feeding unit is mountable into and ...

SHEET CONVEYING DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS

A sheet conveying device includes a pair of upstream sheet conveying rollers, a pair of downstream sheet conveying rollers, and a gate unit including multiple striking faces disposed adjacent to the pair of downstream sheet conveying rollers. The gate unit is enabled to enter and evacuate from a sheet conveyance path. A skew correction control mechanism is provided to correct skew by bringing the gate unit into the sheet conveyance path to cause the striking faces to collide with a leading end of the sheet with the skew while rotating the pair of upstream sheet conveying rollers. One or more rollers are included in one of the pair of upstream sheet conveying rollers and are disposed in the vicinity of a widthwise center of the sheet conveyance path. A width of one or more rollers is smaller than a widthwise interval between the multiple striking faces. 1. A sheet conveying device comprising:a sheet conveying guide disposed in a sheet conveyance path to guide a sheet;a pair of upstream sheet conveying rollers disposed upstream of the sheet conveying guide in a sheet conveyance direction in the sheet conveyance path;a pair of downstream sheet conveying rollers disposed downstream of the pair of upstream side sheet conveying rollers in the sheet conveyance direction;a gate unit located adjacent to the pair of downstream sheet conveying rollers, the gate unit including at least two striking faces divided perpendicular to the sheet conveyance direction, the gate unit enabled to enter and evacuate from the sheet conveyance path, anda skew correction control mechanism to correct skew by bringing the gate unit into the sheet conveyance path to cause the striking face to collide with a leading end of the sheet coming with skew while rotating the pair of upstream sheet conveying rollers,wherein at least one roller included in one of the pair of upstream sheet conveying rollers is disposed in the vicinity of a widthwise center of the sheet conveyance path, the at least one ...

Paper feeding apparatus of printer

A paper feeding apparatus includes a bracket. A first feeding shaft is pivotably mounted on the bracket. A number of first feeding rollers is mounted on the first feeding shaft. The first feeding rollers rotate together with the first feeding shaft to contact a sheet of paper and move the paper forwards. A number of fans are mounted on the first feeding shaft. The fans rotate together with the first feeding shaft to drive air against the paper to prevent it becoming wrapped around one of the rollers.

PAPER DELIVERY DEVICE

A paper delivery device includes a mounting shaft, a paper guide assembly attached to the mounting shaft, a first wheel, a second wheel, and a driving module configured to drive the first wheel and the second wheel to rotate in a first direction or a second direction that is reverse to the first direction. The paper guide assembly includes a first guide module attached to the mounting shaft and a second guide module attached to the mounting shaft. The first wheel abuts the first guide module. The second wheel abuts the second guide module. The first guide module and the second guide module is movable towards each other when the first wheel and the second wheel rotate in the first direction, or movable away from each other when the first wheel and the second wheel rotate in the second direction. 1. A paper delivery device comprising:a mounting shaft;a paper guide assembly comprising at least one first guide unit attached to the mounting shaft, a first elastic member attached to the at least one first guide unit, at least one second guide unit attached to the mounting shaft, and a second elastic member attached to the at least one second guide unit;a first wheel abutting the at least one first guide unit;a second wheel abutting the at least one second guide unit; anda driving module configured to drive the first wheel and the second wheel to rotate in a first direction or a second direction that is opposite to the first direction;wherein the at least one first guide unit and the at least one second guide unit is movable towards each other when the first wheel and the second wheel rotated in the first direction, or movable away from each other when the first wheel and the second wheel rotated in the second direction; the first elastic member and the second elastic member are capable biasing the at least one first guide unit and the at least one second guide unit moving towards each other when released.2. The paper delivery device of claim 1 , wherein each of the first ...

PAPER TRANSMISSION APPARATUS

A paper transmission apparatus includes a paper-in mechanism including a first roller, a paper-out mechanism including a second roller, a gear assembly, and a swing member. The swing member is connected to the first roller to the gear assembly. The first roller is rotatable along a first direction to rotate the swing member, and the swing member is capable of moving the gear assembly to be meshed with the second roller, to accelerate a rotating speed of the second roller being greater than a rotating speed of the first roller. The first roller is rotatable along a second direction opposite to the first direction to rotate the swing arm, and the swing arm is capable of moving the gear assembly to be meshed with the second roller, to decelerate the rotating speed of the second roller being smaller than the rotating speed of the firs roller. 1. A paper transmission apparatus comprising:a paper-in mechanism comprising a first roller;a paper-out mechanism comprising a second roller;a gear assembly meshed with the first roller; anda swing member connecting the first roller to the gear assembly,wherein the first roller is rotatable along a first direction to rotate the swing member, the swing member is configured to move the gear assembly to be meshed with the second roller, to accelerate a rotating speed of the second roller to be greater than a rotating speed of the first roller; the first roller is rotatable along a second direction opposite to the first direction to rotate the swing member, the swing member is configured to move the gear assembly to be meshed with the second roller, and to decelerate the rotating speed of the second roller to be smaller than the rotating speed of the first roller.2. The paper transmission device of claim 1 , wherein the paper-in mechanism comprises a paper-in shaft claim 1 , the first roller is secured to the paper-in shaft rotated with the first roller claim 1 , and the swing member is pivotally secured to the paper-in shaft.3. The ...

Sheet conveyor and image forming apparatus incorporating same

A sheet conveyor incorporated in an image forming apparatus includes an attraction/separation unit including an attraction belt, a first tension roller, and a second tension roller, a support member to support the attraction/separation unit, a roller drive unit to rotate one of the first and second tension rollers, a charging member to uniformly charge a surface of the attraction belt, a mechanism to swing the attraction/separation unit to move the attraction belt reciprocally about the support member between a sheet attraction position and a sheet conveyance position being located farther from the sheet stack than the sheet attraction position, and a pressing member disposed inside a loop of the attraction belt to press the attraction belt at the sheet attraction position toward the sheet stack and separating from the attraction belt at the sheet conveyance position.

PAPER PRESSING APPARATUS FOR PRINTING APPARATUS

A paper pressing apparatus for a printing apparatus includes a bracket, a paper pressing member, a first gear, a first rolling arm, a second rolling arm, and a first elastic member. The paper pressing member is lifted up from the bracket to accommodate heavily creased or buckled papers, and then released to press the papers flat as they are drawn into the printer. 1. A paper pressing apparatus for a printing apparatus comprising:a bracket;a paper pressing member movably secured to the bracket;a first gear fixed on the bracket;a first rolling arm connected to the paper pressing member;a second rolling arm movably connected to the first gear and the first rolling arm;a first elastic member connected to the bracket and the paper pressing member; anda resisting portion formed on the first gear, wherein when the first gear rotates along a first direction, the resisting portion resists against the second rolling arm, the second rolling arm moves toward a second direction on the bracket, the second rolling arm drives the first rolling arm and the paper pressing member rotating along a third direction, the first elastic member is elastically deformed, and the paper pressing member is lifted up from the bracket; and when the first gear rotates along the third direction, the resisting portion releases the second rolling arm, the second rolling arm moves toward a fourth direction on the bracket, the first elastic member is elastically returned, the first rolling arm and the paper pressing member rotate along the first direction, and the paper pressing member is lain down on the bracket.2. The paper pressing apparatus of claim 1 , further comprising a second elastic member mounted on the first rolling arm and the second rolling arm; when the resisting portion resists against the second rolling arm claim 1 , the second elastic member is elastically deformed; and when the resisting portion releases the second rolling arm claim 1 , the second elastic member is elastically returned ...

IMAGE FORMING APPARATUS, AND SHEET FEEDING DEVICE

An image forming apparatus includes an image forming section that forms an image on a recording material, and a feeder that feeds the recording material to the image forming section, wherein the feeder includes a recording material accommodating unit that accommodates recording materials, a suction device that sucks air, forming members that are provided with an opening formed close to the recording materials accommodated in the recording material accommodating unit, and form a negative-pressure space, which has negative pressure due to suction by the suction device, together with the recording material facing the opening, partition members that include edge portions formed close to the opening, are formed so as to extend from the edge portions toward the inside of the negative-pressure space, and partition the negative-pressure space into two or more spaces, and feeding members that feed the recording material pulled toward the forming members when the negative-pressure space has negative pressure. 1. An image forming apparatus comprising:an image forming section that forms an image on a recording material; anda feeder that feeds the recording material to the image forming section, a recording material accommodating unit that accommodates recording materials,', 'a suction device that sucks air,', 'forming members that are provided with an opening formed close to the recording materials accommodated in the recording material accommodating unit, and form a negative-pressure space, which has negative pressure due to suction performed by the suction device, together with the recording material positioned at a position facing the opening,', 'partition members that include edge portions formed close to the opening, are formed so as to extend from the edge portions toward the inside of the negative-pressure space, and partition the negative-pressure space into two or more spaces, and', 'feeding members that feed the recording material pulled toward the forming members ...

SHEET CONVEYING APPARATUS

A sheet conveying apparatus includes an intermediate plate () as a sheet receiving member configured to stack a sheet, a feed roller () as a feed rotator configured to feed the sheet stacked on the intermediate plate (), and a separation roller () as a separation member configured to separate the sheet from a sheet bundle stacked on the intermediate plate (). The sheet conveying apparatus further includes a restrict member () as a restrict portion disposed so as to reach a position overlapped in a width direction orthogonal to a sheet conveying direction with the feed roller () as at least one member among the feed roller () and the separation roller () and offset in the width direction from the feed roller (), and restricting a leading end position of the sheet stacked on the intermediate plate (). This arrangement enables to improve sheet conveying performance because the restrict member () can restrict the leading end position of the sheet stacked on the intermediate plate (). 1. A sheet conveying apparatus , comprising:a sheet receiving member on which a sheet is stacked;a feed rotator configured to feed the sheet stacked on the sheet receiving member;a separation member configured to separate the sheet from a sheet bundle stacked on the sheet receiving member; anda restrict portion disposed so as to reach a position where the restrict portion is overlapped in a width direction orthogonal to a sheet conveying direction with at least one member among the feed rotator and the separation member and where the restrict portion is offset in the width direction from the one member, and restricting a leading end position of the sheet stacked on the sheet receiving member.2. The sheet conveying apparatus according to claim 1 ,further comprising a moving portion that moves the sheet receiving member between a feed position where the sheet stacked on the sheet receiving member is bought into contact with the feed rotator and a standby position distant from the feed rotator ...

SHEET TRANSPORT MECHANISM AND IMAGE FORMING APPARATUS HAVING THE SAME

A sheet transport mechanism includes a pair of transport rollers and a roller pressing mechanism. The roller pressing mechanism includes one pair of first levers, one pair of second levers, and an elastic member. The one pair of first levers are supported to swing around a first swing shaft. A rotary shaft of a second roller of the pair of transport rollers is rotatably supported by a bearing aperture formed at substantially a center of the first lever. In addition, the one pair of second levers are supported to swing around the second swing shaft. Both ends of the elastic member are connected to tip ends of the second levers. The end of each second lever rotates around the second swing shaft, and presses the first lever toward the first roller of the pair of transport rollers. 1. A sheet transport mechanism comprising:a pair of transport rollers including a first roller which is rotated by a driving force from a drive source, and a second roller which is pressed against the first roller and driven to be rotated, the pair of transport rollers being configured to nip and transport a recording medium in a nip portion between the first roller and the second roller;a pair of first levers provided at both ends of a rotary shaft of the second roller, each of the pair of first levers having a bearing aperture which rotatably supports the rotary shaft, each of the pair of first levers being configured to swing in directions of contact with and separation from the first roller with a first swing shaft extending in a direction parallel to rotary shafts of the first and second rollers as a rotation center;a pair of second levers arranged to swing in the directions of contact with and separation from the first roller around second swing shafts each provided orthogonal to the associated first swing shaft and a pressing direction of the second roller and lateral to an associated one of the pair of first levers, the pair of second levers being configured to cause the first levers ...

SHEET CONVEYING ROLLER AND IMAGE FORMING APPARATUS

The inventive sheet conveying roller includes a plurality of linear projections () provided on an outer peripheral surface () of a roller body () of an elastic material and each having a generally right-angled triangular cross section which includes a hypotenuse edge () and an adjoining edge () provided on a forward side and on a rearward side, respectively, with respect to a roller body rotation direction, the adjoining edge () aligning with a line () perpendicular to a center axis (L) of the roller body (). The linear projections () are rounded with the hypotenuse edges () and the adjoining edges () thereof connected to each other by curves () as seen in section, and provided integrally with the roller body () to be equidistantly arranged on the outer peripheral surface of the roller body. 1. A sheet conveying roller comprising:a tubular roller body unitarily formed of an elastic material and having a plurality of linear projections circumferentially equidistantly provided on an outer peripheral surface thereof as extending axially of the roller body;wherein the linear projections each have a generally right-angled triangular cross section taken perpendicularly to a center axis of the roller body, the generally right-angled triangular cross section including a hypotenuse edge and an adjoining edge located on a forward side and on a rearward side, respectively, with respect to a circumferential roller body rotation direction, the adjoining edge aligning with a line perpendicular to the center axis of the roller body;wherein a corner defined between the hypotenuse edge and the adjoining edge of each of the linear projections is rounded as seen in section;wherein a corner defined between the hypotenuse edge of one of each two adjacent linear projections and the adjoining edge of the other linear projection is rounded as seen in section.2. The sheet conveying roller according to claim 1 , wherein an open angle defined between each two adjacent linear projections about ...

RECORDING MEDIUM TRANSPORT DEVICE, AND IMAGE FORMING APPARATUS

A recording medium transport device includes a connecting member that connects two transport roller pairs, and a drive switching section that is provided to one of the two transport roller pairs, and switches between a state in which a rotational drive force is transmitted between the two transport roller pairs via the connecting member and a state in which the rotational drive force is not transmitted between the two transport roller pairs. A controller of the recording medium transport device causes the drive switching section to switch from the state in which the rotational drive force is not transmitted between the two transport roller pairs to the state in which the rotational drive force is transmitted between the two transport roller pairs via the connecting member, when the rotational speed of at least one of the transport roller pairs falls outside a predetermined speed range. 1. A recording medium transport device comprising:a transport path along which a recording medium is transported;two transport roller pairs, that are located at different positions on the transport path in a transport direction of the recording medium, and transport the recording medium;two stepping motors, that are provided for each one of the two transport roller pairs respectively, and supply a rotational drive force to the relevant transport roller pairs;a rotational speed detecting section configured to detect a rotational speed of at least one of the two transport roller pairs;a connecting member configured to connect the two transport roller pairs;a drive switching section, that is provided to one of the two transport roller pairs and is configured to switch between a state in which the rotational drive force is transmitted between the two transport roller pairs via the connecting member and a state in which the rotational drive force is not transmitted between the two transport roller pairs; anda controller configured to cause the drive switching section to switch from the ...

PAPER CONVEYING APPARATUS

There are provided a paper conveying apparatus which can drive paper set guides, paper feed rollers, retard rollers, and conveyor rollers by a single motor. The paper conveying apparatus includes a paper set guide for setting paper, a paper feed roller for feeding paper set at the paper set guide, a retard roller arranged facing the paper feed roller, a conveyor roller for further conveying paper fed by the paper feed roller, a motor for generating a drive force for driving the paper set guide, and a transmission mechanism, arranged straddling a transport path of the paper, for transmitting the drive force to the paper feed roller and the retard roller, wherein the conveyor roller is driven by the transmission mechanism. 1. A paper conveying apparatus comprising:a paper set guide for setting paper;a paper feed roller for feeding paper set at the paper set guide;a retard roller arranged facing the paper feed roller;a conveyor roller for further conveying paper fed by the paper feed roller;a motor for generating a drive force for driving the paper set guide; anda transmission mechanism, arranged straddling a transport path of the paper, for transmitting the drive force to the paper feed roller and the retard roller,wherein the conveyor roller is driven by the transmission mechanism.2. The paper conveying apparatus according to claim 1 , wherein a first drive mechanism for driving the paper set guide and the motor are arranged at one side of the paper conveying apparatus with respect to the transport path claim 1 , and a second drive mechanism for driving the paper feed roller and a third drive mechanism for driving the retard roller are arranged at the other side of the paper conveying apparatus.3. The paper conveying apparatus according to claim 1 , whereinthe motor generates a drive force of a forward direction for feeding the paper and a drive force of a reverse direction from the forward direction, andthe conveyor roller is provided with a clutch for transmitting ...

SHEET CONVEYING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SHEET CONVEYING DEVICE

A sheet conveying device includes a sheet conveying path, a first conveying roller pair, a second conveying roller pair and a sheet guiding member. The sheet conveying path conveys a sheet in a first direction, and then, conveys the sheet in a second direction. The first conveying roller pair conveys the sheet in the first direction. The second conveying roller pair is located at a downstream side from the first conveying roller pair to convey the sheet to the second direction from the first direction. The sheet guiding member is located between the first conveying roller pair and second conveying roller pair so as to advance and retreat to the sheet conveying path, and then, in an advance state, to come into contact with a sheet face of the sheet conveyed while being bridged across the first conveying roller pair and second conveying roller pair. 1. A sheet conveying device comprising:a housing;a sheet conveying path arranged in the housing to convey a sheet in a first direction, and then, to convey the sheet in a second direction crossing the first direction;a first conveying roller pair conveying the sheet in the first direction;a second conveying roller pair located at a downstream side in a sheet conveying direction from the first conveying roller pair to convey the sheet to the second direction from the first direction; anda sheet guiding member located between the first conveying roller pair and second conveying roller pair so as to advance and retreat to the sheet conveying path, and then, in an advance state, to come into contact with a sheet face of the sheet conveyed while being bridged across the first conveying roller pair and second conveying roller pair.2. The sheet conveying device according to claim 1 , wherein the sheet guiding member advances to the sheet conveying path when thickness of the sheet conveyed in the sheet conveying path is thinner than a predetermined threshold claim 1 , and the sheet guiding member retreats from the sheet conveying ...

Image Forming Apparatus

An image forming apparatus has an image forming unit, a sheet supplying unit, a register roller, and a paper particle removing unit which includes a paper particle removing roller arranged to face the register roller and configured to collect paper particles on the sheet which is nipped between the register roller and the paper particle removing roller, a paper particle container configured such that the paper particles removed by the paper particle removing roller are accumulated therein, and an auger arranged inside the paper particle container. The paper particle removing roller, the paper particle container and the auger of the paper particle removing unit are configured to move together between a contact position where the paper particle removing roller contacts the register roller and a spaced position where the paper particle removing roller is spaced from the register roller. 1. An image forming apparatus , comprising:an image forming unit configured to form an image on a sheet;a sheet supplying unit configured to supply a sheet to the image forming unit;a register roller arranged on a downstream, in a sheet feeding direction, of the sheet supplying unit and on an upstream, in the sheet feeding direction, of the image forming unit; and a paper particle removing roller arranged to face the register roller and configured to collects paper particles on the sheet which is nipped between the register roller and the paper particle removing roller;', 'a paper particle container configured such that the paper particles removed by the paper particle removing roller is accumulated in the paper particle container; and', 'an auger arranged inside the paper particle container,, 'a paper particle removing unit includeswherein the paper particle removing roller, the paper particle container and the auger included in the paper particle removing unit are configured to be movable together between a contact position where the paper particle removing roller contacts the ...

Paper conveying apparatus, recovery method, and computer-readable, non-transitory medium

There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can improve the user friendliness in the recovery processing when determining that a jam has occurred during conveyance of a paper. The paper conveying apparatus includes a sound signal generator for generating a sound signal, a sound jam detector for determining whether a jam has occurred based on the sound signal, a control module for stopping conveyance of a paper when the sound jam detector determines that the jam has occurred, a paper state detector for detecting a state of the paper, and a recovery processing module for automatically performing a recovery processing which resumes conveyance of the paper in accordance with a content of the detection of the paper state detector after stopping the conveyance of the paper by the control module.

SHEET CONVEYANCE APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveyance apparatus includes a first conveyance roller configured to convey a sheet, a second conveyance roller configured to convey the sheet at a variable speed ranging from a first sheet conveyance speed to a second sheet conveyance speed wherein the first sheet conveyance speed is less than a sheet conveyance speed of the first conveyance roller and the second sheet conveyance speed is greater than the sheet conveyance speed of the first conveyance roller, a driving unit configured to drive the second conveyance roller, and a control unit configured to control the driving unit 1. A sheet conveyance apparatus comprising:a first conveyance roller configured to convey a sheet;a second conveyance roller configured to convey the sheet at a variable speed ranging from a first sheet conveyance speed to a second sheet conveyance speed, wherein the second conveyance roller is arranged downstream of the first conveyance roller in a sheet conveyance direction side by side, wherein the first sheet conveyance speed is less than a sheet conveyance speed of the first conveyance roller and the second sheet conveyance speed is greater than the sheet conveyance speed of the first conveyance roller;a driving unit configured to drive the second conveyance roller; anda control unit configured to control the driving unit, whereinthe control unit controls the driving unit so that the second conveyance roller, in conjunction with the first conveyance roller, conveys a sheet, at the sheet conveyance speed of the second conveyance roller as the first sheet conveyance speed, to generate a loop on the sheet until the second conveyance roller conveys the sheet a predetermined amount, and after the second conveyance roller has conveyed the sheet the predetermined amount, an acceleration is switched while the sheet conveyance speed of the second conveyance roller is increased from the first sheet conveyance speed to the second sheet conveyance speed, and the loop is eliminated while ...

Image Forming Apparatus

An image forming apparatus has a main body having a sheet feed path and an opening. A sheet placing part defined in the main body. The sheet inserted through the opening is placed on the sheet placing part. A supply roller arranged to face the placing part and feeds the sheet placed on the sheet placing part in a sheet feed direction toward the sheet feed path, a frame arranged to face the sheet placing part and configured to support the supply roller, the frame having a protruded part protruded on an opening side with respect to the supply roller. An image forming unit is provided inside the main body. An inclined surface is formed on a side of the protruded part facing the sheet placing part, and the protruded part has an inclined surface facing the sheet placing part and inclined such that a distance between the inclined surface and the sheet placing part becomes gradually smaller toward the supply roller. 1. An image forming apparatus , comprising:a main body having a sheet feed path configured such that a sheet is fed along the sheet feed path and an opening through which an inside and an outside of the main body communicate with each other;a sheet placing part defined in the main body and configured such that the sheet inserted, through the opening, in the main body is placed on the sheet placing part;a supply roller arranged to face the sheet placing part and configured to feed the sheet placed on the sheet placing part in a sheet feed direction toward the sheet feed path;a frame arranged to face the sheet placing part and configured to support the supply roller, the frame having a protruded part which is protruded, in the sheet feed direction, on an opening side with respect to the supply roller; andan image forming unit provided inside the main body and configured to form an image on the sheet,wherein the protruding part comprises an inclined surface facing the sheet placing part and inclined such that a distance between the inclined surface and the sheet ...

TRANSPORT APPARATUS AND RECORDING APPARATUS PROVIDED WITH THE SAME

A transport apparatus includes: a guide surface which extends in a transport direction for transporting a medium and which is configured to guide the medium to be transported; a first roller which is a driving roller for transporting the medium; a second roller which is a driven roller arranged to face the first roller; and a roller support member which rotatably supports the second roller and which is configured to be pivotable about a support shaft perpendicular to an axis of a rotational shaft of the second roller between a first position and a second position. 1. A transport apparatus comprising:a guide surface which extends in a transport direction for transporting a medium and which is configured to guide the medium to be transported;a first roller which is a driving roller for transporting the medium;a second roller which is a driven roller arranged to face the first roller; anda roller support member which rotatably supports the second roller and which is configured to be pivotable about a support shaft perpendicular to an axis of a rotational shaft of the second roller between a first position and a second position,wherein in a state that the roller support member is positioned at the first position, an angle formed by a portion of the guide surface, which is disposed on a downstream side in the transport direction from a point of intersection between the axis of the rotational shaft of the second roller and the guide surface, and the axis of the rotational shaft of the second roller is an acute angle, andwherein in a state that the roller support member is positioned at the second position, the angle approaches a right angle as compared with the state that the roller support member is positioned at the first position.2. The transport apparatus according to claim 1 , further comprising a first urging member which urges the roller support member in a direction in which the second roller is disposed at the first position.3. The transport apparatus according ...

MEDIUM CONVEYING APPARATUS

A medium conveying apparatus includes a medium tray on which a medium is placed, a skew corrector that rotates the medium in such a manner that a part of an end of the medium is aligned with a predetermined line, a rotating member that contacts with the medium, and a conveyor that conveys the medium in a conveying direction, wherein the rotating member is supported rotatably on the medium tray so that, when the medium moves in a direction different from the conveying direction, the rotating member rotates following the medium. 1. A medium conveying apparatus comprising:a medium tray on which a medium is placed;a skew corrector that rotates the medium in such a manner that a part of an end of the medium is aligned with a predetermined line;a rotating member that is contacts with the medium; anda conveyor that conveys the medium in a conveying direction, whereinthe rotating member is supported rotatably on the medium tray so that, when the medium moves in a direction different from the conveying direction, the rotating member rotates following the medium.2. The medium conveying apparatus according to claim 1 , further comprising a separator that separates the medium that is in contact with the medium tray claim 1 , out of a plurality of media placed on the medium tray.3. The medium conveying apparatus according to claim 1 , wherein the rotating member is supported rotatably on the medium tray so as to further rotate in the conveying direction.4. The medium conveying apparatus according to claim 1 , further comprising an other rotating member that contacts with the medium claim 1 , whereinthe other rotating member is supported rotatably on the medium tray so that, when the medium moves in a direction different from the conveying direction, the other rotating member is rotated following the medium. This application is a continuation of International Application No. PCT/JP2019/011923, filed on Mar. 20, 2019, the entire contents of which are incorporated herein by ...

SHEET FEED APPARATUS, AND IMAGE FORMING APPARATUS AND IMAGE READING APPARATUS INCLUDING THE SHEET FEED APPARATUS

In a sheet feed apparatus, sheet feed roller is provided in casing so as to face downstream side of sheet stacking portion in sheet conveying direction, and conveys sheets in sheet conveying direction. Separation pad is provided facing sheet feed roller, forms, with sheet feed roller, nip portion through which sheets pass, and conveys sheets one by one in sheet conveying direction. Holder fixes and supports separation pad. Mount portion mounts holder. An urging member urges separation pad toward sheet feed roller via the holder. Holder is changeable in its posture between a first posture in which separation pad is spaced apart from sheet feed roller so as to release nip portion having been formed therebetween, and a second posture in which nip portion is formed between separation pad and sheet feed roller. Holder includes a contact part that contacts the mount portion in the second posture. 1. A sheet feed apparatus comprising:a casing;a sheet stacking portion provided in the casing, in which sheets are stacked;a sheet conveying path through which the sheets stacked in the sheet stacking portion are conveyed in a predetermined sheet conveying direction;a sheet feed roller provided in the casing so as to face a downstream side of the sheet stacking portion in the sheet conveying direction, and configured to convey the sheets in the sheet conveying direction;a separation pad provided facing the sheet feed roller, and configured to form, with the sheet feed roller, a nip portion through which the sheets pass, and convey the sheets one by one in the sheet conveying direction;a holder configured to fix and support the separation pad;a mount portion provided in the downstream side from the sheet stacking portion in the sheet conveying direction in the casing, to and from which the holder is mountable and removable; andan urging member configured to urge the separation pad toward the sheet feed roller via the holder being in a mounted state where the holder is mounted to ...

IMAGE FORMING APPARATUS

The present invention provides an image forming apparatus that reduces image artifacts caused by the back tension of a separating unit. A control unit decreases the number of rotations (the rotational speed) of a resist roller pair after the leading edge of a sheet reaches a transfer position. 1a feeding member configured to feed a sheet;a separating member configured to form a nip portion with the feeding member and separate sheets one by one at the nip portion;a conveying unit disposed downstream of the feeding member in a sheet feeding direction and configured to convey a sheet;a transfer unit disposed downstream of the conveying unit in the sheet feeding direction and configured to transfer an image formed on an image bearing member onto the sheet while the sheet is being conveyed; anda control unit configured to control the conveying unit,wherein, in a case where a trailing edge of the sheet passes through the nip portion after a leading edge of the sheet reaches the transfer unit, the control unit sets a conveyance speed of the sheet by the conveying unit to a first speed,wherein, before the trailing edge of the sheet passes through the nip portion in a state that a loop of the sheet is formed between the conveying unit and the transfer unit, the control unit sets the conveyance speed of the sheet by the conveying unit to a second speed slower than the first speed, andwherein, according to the trailing edge of the sheet having passed through the nip portion, the conveyance speed of the sheet by the conveying unit is changed to a third speed faster than the second speed.. An image forming apparatus comprising: This application is a continuation of U.S. patent application Ser. No. 16/192,026 filed on Nov. 15, 2018, which is a continuation of U.S. patent application Ser. No. 15/797,804, filed on Oct. 30, 2017, and issued as U.S. Pat. No. 10,155,636 on Dec. 18, 2018, which is a continuation of U.S. patent application Ser. No. 14/764,538, filed on Jul. 29, 2015, ...

IMAGE PROCESSING DEVICES AND SHEET FEEDING DEVICES

An image processing device includes first and second feeding units. The first feeding unit feeds a sheet toward the second feeding unit in a sheet feeding direction via a sheet feeding path. The device further includes an image processing portion. The first feeding unit is in the path upstream of the processing portion and includes a first shaft rotating in the feeding direction. The second feeding unit is in the path downstream of the processing portion, and the first and the second units feed and hold the sheet. The second feeding unit includes a second shaft rotating in the feeding direction. The device includes a first supporting member supporting first and second ends of the first shaft, a second supporting member supporting first and second ends of the second shaft, and a third supporting member supporting one shaft at a predetermined portion which is not either end of either shaft. 1. An image processing device comprising:a conveying mechanism configured to convey a sheet in a conveyance direction along a conveyance path; anda sensor disposed in the conveyance path; a first shaft disposed downstream of the sensor in the conveyance direction and having a first-shaft first supported portion, a first-shaft second supported portion and a first-shaft third supported portion positioned between the first-shaft first supported portion and the first-shaft second supported portion;', 'a second shaft disposed upstream of the sensor in the conveyance direction and having a second-shaft first supported portion and a second-shaft second supported portion;', 'a first-shaft first supporting portion configured to support the first-shaft first supported portion and having a bearing configured to receive the first-shaft first supported portion;', 'a first-shaft second supporting portion configured to support the first-shaft second supported portion and having a bearing configured to receive the first-shaft second supported portion;', 'a first-shaft third supporting portion ...

IMAGE FORMING APPARATUS

An image forming apparatus is configured such that in a case where images are to be formed on a first surface of a preceding sheet, on a first surface of a succeeding sheet fed to the first conveyance path succeeding to the preceding sheet and on a second surface of the preceding sheet, a first conveyance member is stopped without reversing the preceding sheet to a second conveyance path in a case where the image has been formed on the first surface of the preceding sheet and permission of preparing the image to be formed on the first surface of the succeeding sheet is not issued yet, and the first conveyance member restarts conveyance of the preceding sheet to the second conveyance path based on timing when an image forming unit starts preparing the image to be formed on the first surface of the succeeding sheet. 1. An image forming apparatus comprising:a first conveyance path;an image forming unit configured to form an image on a sheet passing through the first conveyance path;a first conveyance member configured to receive the sheet from the first conveyance path and convey the sheet to reverse the sheet;a second conveyance path through which the sheet reversed by the first conveyance member is guided to the first conveyance path;a first driving source configured to drive the first conveyance member; and in a case where images are to be formed on a first surface of a preceding sheet, on a first surface of a succeeding sheet fed to the first conveyance path succeeding to the preceding sheet and on a second surface of the preceding sheet,', 'the controller causes the first conveyance member to stop without reversing the preceding sheet in a direction of heading to the second conveyance path in a case where the image has been formed on the first surface of the preceding sheet and permission of preparing the image to be formed on the first surface of the succeeding sheet is not issued yet, and', 'the controller causes the first conveyance member to restart conveyance ...

SHEET CONVEYING APPARATUS, IMAGE READING APPARATUS, AND IMAGE FORMING APPARATUS

A sheet conveying apparatus includes a sheet conveyance section, a roller pair unit, first and second guides, and a movable guide including an upstream portion extending upstream in the sheet conveying direction with respect to the nip portion and a downstream portion extending downstream in the sheet conveying direction with respect to the nip portion. The roller pair unit nips the sheet, warps the sheet in a case where a leading end of the sheet conveyed by the sheet conveyance section comes into contact with the roller pair unit, and conveys the sheet. The first guide opposes a first side of the sheet and guides the sheet. The second guide opposes a second side of the sheet. The movable guide opposes the first side of the sheet and moves in such a manner that the downstream portion of the movable guide moves closer to or away from the second guide. 1. A sheet conveying apparatus comprising:a sheet conveyance section configured to convey a sheet in a sheet conveying direction;a roller pair unit configured to nip and convey the sheet, and to warp the sheet in a case where a leading end of the sheet conveyed by the sheet conveyance section comes into contact with the roller pair unit;a first guide configured to oppose a first side of the sheet and to guide the sheet;a second guide configured to oppose a second side of the sheet that is opposite to the first side; anda movable guide including an upstream portion extending upstream in the sheet conveying direction with respect to the nip portion and a downstream portion extending downstream in the sheet conveying direction with respect to the nip portion,wherein the movable guide is configured to oppose the first side of the sheet and to be movable in such a manner that, in a case where the movable guide moves, the downstream portion of the movable guide moves closer to or away from the second guide.2. The sheet conveying apparatus according to claim 1 ,wherein, in a case in which the roller pair unit does not convey ...

MEDIUM TRANSPORT APPARATUS AND IMAGE READING APPARATUS

A moving-side roller reliably separates from a stationary-side roller so as to enable appropriate document transport. An image reading apparatus causes a roller support member supporting the moving-side roller to come into contact with the stationary-side roller. A contact state and a separation state can be switched. The image reading apparatus includes an external force providing portion to exert a third external force on the roller support member in a direction for restraining warping that is generated in the roller support member by a first external force that a cam exerts on the roller support member and by a second external force that an urging device exerts on the roller support member. 1. A medium transport apparatus comprising:a medium transport roller pair including a stationary-side roller disposed on a medium transport path along which a medium is transported and a moving-side roller formed so as to be able to come into contact with, or separate from, the stationary-side roller;a roller support member formed so as to support the moving-side roller and be able to assume a first state in which the roller support member causes the moving-side roller to be in contact with the stationary-side roller and a second state in which the roller support member causes the moving-side roller to separate from the stationary-side roller;an urging device urging the roller support member toward the first state;a cam formed so as to engage the roller support member and shift the roller support member from the first state to the second state against an urging force of the urging device; andan external force providing portion to exert, while the roller support member is shifted by the cam to be in the second state, a third external force on the roller support member in a direction for restraining warping that is generated in the roller support member by a first external force that the cam exerts on the roller support member and by a second external force that the urging ...

Image forming apparatus

An image forming apparatus includes an apparatus body, a rotatable first rotary member, a rotatable second rotary member, a casing, a sheet discharge port, an opening and closing member, a duct, and a fan. The casing is provided within the apparatus body and storing the first and second rotary members. The sheet discharge port discharges the recording material that has passed through the nip portion out of the casing. The opening and closing member has the sheet discharge port and opens a conveyance path of the recording material from the nip portion to the sheet discharge port. The fan suctions air from the suction port through the duct. The duct is provided on the opening and closing member and comprises a suction port to suction air from the conveyance path. The suction port is provided on the same side as the first rotary member with respect to the conveyance path.

SHEET CONVEYANCE APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveyance apparatus includes a conveyance unit configured to convey a sheet, a guide member disposed to define a conveyance path, a light-emitting element, a light-receiving element configured to output a detection signal that changes in accordance with an amount of received light, a first light-passing portion disposed to define an optical path from the light-emitting element to the conveyance path, and a second light-passing portion disposed to define an optical path from the conveyance path to the light-receiving element. The light-receiving element is configured such that the detection signal changes in accordance with whether or not a sheet is present in the conveyance path. Reflectance of each of the first light-passing portion and the second light-passing portion to the light emitted from the light-emitting element is higher than reflectance of the guide member to the light emitted from the light-emitting element. 1. A sheet conveyance apparatus comprising:a conveyance unit configured to convey a sheet;a guide member disposed to define a conveyance path through which a sheet is conveyed;a light-emitting element configured to emit light;a light-receiving element configured to output a detection signal that changes in accordance with an amount of received light;a first light-passing portion disposed to define an optical path from the light-emitting element to the conveyance path; anda second light-passing portion disposed to define an optical path from the conveyance path to the light-receiving element,wherein the light-receiving element is configured such that the detection signal changes in accordance with whether or not a sheet is present in the conveyance path, andwherein reflectance of each of the first light-passing portion and the second light-passing portion to the light emitted from the light-emitting element is higher than reflectance of the guide member to the light emitted from the light-emitting element.2. The sheet conveyance apparatus ...

IMAGE FORMING APPARATUS

An image forming apparatus includes a first roller to come into contact with a first side of a recording medium and a second roller and a third roller to come into contact with a second side of the recording medium opposite the first side. Each of the first roller, the second roller, and the third roller includes a plurality of increased diameter portions and a plurality of decreased diameter portions alternately arranged in an axial direction of each of the first roller, the second roller, and the third roller to produce an uneven outer circumferential surface thereof. The increased diameter portions of the first roller overlap the increased diameter portions of each of the second roller and the third roller, respectively, with a clearance therebetween. 1. An image forming apparatus comprising:a first roller to come into contact with a first side of a recording medium that bears an image to convey the recording medium;a second roller disposed opposite the first roller; anda third roller disposed opposite the first roller and aligned with the second roller in a recording medium conveyance direction,the second roller and the third roller to come into contact with a second side of the recording medium opposite the first side thereof to convey the recording medium, a plurality of increased diameter portions, each having an increased diameter; and', 'a plurality of decreased diameter portions, each having a decreased diameter,', 'each of the plurality of increased diameter portions and each of the plurality of decreased diameter portions alternately arranged in an axial direction of each of the first roller, the second roller, and the third roller to produce an uneven outer circumferential surface thereof,, 'each of the first roller, the second roller, and the third roller includingwherein the plurality of increased diameter portions of the second roller is isolated from the plurality of increased diameter portions of the third roller, andwherein the plurality of ...

SHEET CONVEYING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME

A sheet conveying device includes: first, second and third rollers, a conveying member, a frame, a first pressing member, and a force-generating unit. The first and second rollers rotate while nipping the sheet therebetween. The third roller and the conveying member nip the sheet therebetween. The frame is elongated parallel to an axis about which the third roller rotates and supports the third roller. The first pressing member applies a first pressing force to an axial center of the first roller to press the first roller toward the second roller and applies a reaction force of the first pressing force to the frame to press the frame in a direction toward the conveying member. The force-generating unit generates a nipping force for nipping the sheet between the third roller and the conveying member and applies an urging force to the frame in a direction away from the conveying member. 1. A sheet conveying device configured to convey a sheet along a sheet-conveying path , the sheet conveying device comprising:a first roller configured to rotate while contacting the sheet, the first roller rotating about a rotational axis extending in an axial direction and having an axial center region in the axial direction;a second roller disposed in confrontation with the first roller, the second roller being configured to rotate while nipping the sheet in cooperation with the first roller;a third roller disposed spaced apart from the first roller, the third roller rotating about a rotational axis extending in the axial direction and being configured to rotate while contacting the sheet;a conveying member disposed in confrontation with the third roller, the conveying member being configured to nip the sheet in cooperation with the third roller;a frame elongated in the axial direction and supporting the third roller;a first pressing member configured to apply a first pressing force to the axial center region of the first roller to press the first roller toward the second roller, ...

SHEET FEEDING DEVICE, AND IMAGE READING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THIS

In a sheet feeding device, a feeding roller is driven and rotated to feed a sheet in a conveying direction of a sheet conveying path and a drive transmission mechanism transmits rotation drive force generated in a driving portion to the feeding roller. In this mechanism, a drive input gear having an inner space is arranged on a rotation axis supporting the feeding roller rotatably so as to rotate by the rotation drive force. A drive transmission gear arranged between the feeding roller and drive input gear on the rotation axis rotates and becomes slide-movable along the rotation axis between a first position transmitting the rotation drive force to the feeding roller and a second position cutting off the transmission of the rotation drive force to the feeding roller by the rotation drive force from the drive input gear to transmit the rotation drive force to the feeding roller. 1. A sheet feeding device , comprising:a tray portion on which a sheet is placed;a sheet conveying path extending from the tray portion to convey the sheet in a predetermined conveying direction;a feeding roller driving and rotating to feed the sheet in the conveying direction;a driving portion generating rotation drive force used for driving and rotating the feeding roller; anda drive transmission mechanism transmitting the rotation drive force to the feeding roller,wherein the drive transmission mechanism includes:a rotation axis supporting the feeding roller rotatably;a drive input gear formed in a cylinder like shape having an inner space and arranged on the rotation axis so as to rotate around the rotation axis by input of the rotation drive force of the driving portion; anda drive transmission gear arranged between the feeding roller and drive input gear on the rotation axis so as to rotate around the rotation axis and to become capable of slide-moving in an axial direction of the rotation axis between a first position where the rotation drive force is transmitted to the feeding roller ...

SHEET CONVEYING APPARATUS AND IMAGE SCANNING APPARATUS

A sheet conveying apparatus includes first and second drive sources, first and second driving units, each including a respective first or second roller to convey a sheet, an operating unit, and a switching unit to switch a state of the sheet conveying apparatus between a first state in which the first driving unit and the second driving unit are not connected to each other and a second state in which the first driving unit and the second driving unit are connected to each other. A first drive source driving force drives the first driving unit. A second drive source driving force drives the second driving unit. The operating unit rotates when manually operated. In the second state, operating unit rotation is transmitted to the first driving unit to rotate the first roller, and operating unit rotation is transmitted to the second driving unit to rotate the second roller. 1. A sheet conveying apparatus comprising:a first drive source;a first driving unit configured to be driven by a driving force of the first drive source and including a first roller configured to convey a sheet;a second drive source;a second driving unit configured to be driven by a driving force of the second drive source and including a second roller configured to convey the sheet;an operating unit configured to rotate when manually operated; anda switching unit configured to switch a state of the sheet conveying apparatus between a first state in which the first driving unit and the second driving unit are not connected to each other and a second state in which the first driving unit and the second driving unit are connected to each other,wherein, in the second state, rotation of the operating unit is transmitted to the first driving unit to rotate the first roller, and rotation of the operating unit is transmitted to the second driving unit to rotate the second roller.2. The sheet conveying apparatus according to claim 1 ,wherein the switching unit includes a movable gear,wherein, in the first ...

SHEET CONVEYANCE APPARATUS

A sheet conveyance apparatus includes a conveyance roller, a first rotary member forming a first nip portion conveying a sheet in a first conveyance direction, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end, and a second rotary member forming a second nip portion conveying a sheet in a second conveyance direction, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of one end of the second rotary member is positioned at a different position in the second conveyance direction with respect to a center of the other end. 1. A sheet conveyance apparatus conveying a sheet comprising:a conveyance roller;a first rotary member configured to be rotated in contact with the conveyance roller, and forming a first nip portion, conveying a sheet in a first conveyance direction, together with the conveyance roller, a rotation axis of the first rotary member being inclined with respect to a rotation axis of the conveyance roller such that a center of one end of the first rotary member is positioned at a different position in the first conveyance direction with respect to a center of the other end of the first rotary member in a view from a rotation axis direction of the conveyance roller; anda second rotary member configured to be rotated in contact with the conveyance roller, and forming a second nip portion, conveying the sheet in a second conveyance direction, together with the conveyance roller, the second rotary member being provided downstream of the first rotary member in a rotation direction of the conveyance roller, a rotation axis of the second rotary member being inclined with respect to the rotation axis of the conveyance roller such that a center of ...

MEDIA TRANSPORT WITH MEDIA ROLLERS OF DIFFERING DIAMETERS

In one example in accordance with the present disclosure a media transport device is described. The device includes a number of drive rollers coupled to a frame. A number of media rollers are also coupled to the frame. The media rollers are in contact with, and rotated by, the number of drive rollers. Media rollers in a first set have a first diameter and media rollers in a second set have a second diameter that is different from the first diameter. The device also includes a number of pinch rollers coupled to the frame. The pinch rollers are in contact with the number of media rollers to form a number of nips through which media passes along a feed path. 1. A media transport device comprising:a number of drive rollers coupled to a frame; media rollers in a first set have a first diameter; and', 'media rollers in a second set have a second diameter that is different from, 'a number of media rollers coupled to the frame, which media rollers are in contact with, and rotated by, the number of drive rollers, whereinthe first diameter; anda number of pinch rollers coupled to the frame, which pinch rollers are in contact with the number of media rollers to form a number of nips through which media passes along a feed path.2. The device of claim 1 , wherein:the number of media rollers are in a pair-wise grouping with the number of drive rollers; andthe number of pinch rollers are in a pair-wise grouping with the number of media rollers.3. The device of claim 1 , wherein the number of drive rollers comprise a single drive roller that is in contact with claim 1 , and rotates the number of media rollers.4. The device of claim 1 , wherein the media rollers in a direction perpendicular to the feed path alternate between those of the first set and those of the second set to corrugate the media along a media width.5. The device of claim 4 , further comprising a number of retractable guides disposed between adjacent media rollers along the direction perpendicular to the feed path. ...

CORRUGATED PAPERBOARD BOX MAKING MACHINE AND SHEET FEEDING CONTROL APPARATUS

Disclosed is a corrugated paperboard box making machine which comprises a sheet feeding apparatus, a processing apparatus, a folder-gluer, a counter-ejector for stacking the box-structured corrugated paperboard sheets and separating them as a batch, a speed setting unit for setting a sheet feeding speed, and a control apparatus. The control apparatus is operable to execute a sheet feeding control processing of the sheet feeding apparatus such that a sheet feeding operation of feeding one corrugated paperboard sheet is successively repeated a number of times corresponding to the number of the given number of box-structured corrugated paperboard sheets in the batch, and a sheet feeding stop control processing of, when the sheet feeding speed is greater than an allowable speed, the sheet feeding apparatus such that the sheet feeding operation is stopped at least once after execution of the sheet feeding control processing. 1. A corrugated paperboard box making machine comprising:a sheet feeding apparatus for feeding one-by-one corrugated paperboard sheets each having a sheet length specified in accordance with an order;a processing apparatus for subjecting each of the corrugated paperboard sheets fed from the sheet feeding apparatus to a given processing;a folder-gluer for folding and gluing each of corrugated paperboard sheets subjected to the given processing to form a box structure;a counter-ejector for stacking the box-structured corrugated paperboard sheets fed out from the folder-gluer and separating the box-structured corrugated paperboard sheets being stacked, as a batch consisting of a given number of the box-structured corrugated paperboard sheets;a speed setting unit for setting a sheet feeding speed at which corrugated paperboard sheets are fed, in advance of execution of the order; anda control apparatus for controlling at least the sheet feeding apparatus,wherein the control apparatus is operable to execute a sheet feeding control processing of ...

SHEET HANDLING APPARATUS

A sheet handling apparatus includes: a transport path along which a sheet is transported; a first transport member disposed on one side of the transport path; and a second transport member disposed opposed to the first transport member with the transport path interposed therebetween. The first transport member and the second transport member are driven to rotate. The sheet is transported by the first transport member rotating with an outer peripheral surface thereof being in contact with a first face of the sheet, and by the second transport member rotating in a direction opposite to a rotation direction of the first transport member, with an outer peripheral surface thereof being in contact with a second face of the sheet different from the first face. 1. A sheet handling apparatus , comprising:a first transport member having an outer peripheral surface that rotates in a first direction in response to the first transport member being driven; anda second transport member having an outer peripheral surface that rotates in a second direction in response to the second transport member being driven, the second direction being opposite to the first direction, whereinthe second transport member disposed to oppose the first transport member such that a transport path that conveys a sheet is formed between the outer peripheral surface of the first transport member and the outer peripheral surface of the second transport member, andthe outer peripheral surface of the first transport member and the outer peripheral surface of the second member being configured to convey the sheet along the transport path in response to the first transport member and the second transport member being driven while a first face of the sheet remains in contact with the outer peripheral surface of the first transport member, and a second face of the sheet remains in contact with the outer peripheral surface of the second member.2. The sheet handling apparatus according to claim 1 , whereinat least ...

AUXILIARY MEDIA UNIT TRANSPORTER FOR MEDIA PROCESSING DEVICES

A media processing device with a housing includes: a motorized media unit transporter to drive a media unit along a media processing path between an unprocessed media unit source and a processed media unit output; an auxiliary media unit transporter including a roller connected to a converter, and a bias member connected between the converter and the housing. In a first operating mode, the auxiliary transporter receives the media unit from the transporter to drive the roller and the converter; rotation of the converter deforms the bias member from a resting position to a primed position. In a second operating mode initiated upon rotation of the converter to a bias release position, the auxiliary transporter propels the media unit by releasing the bias member from the primed position to drive rotation of the converter and the roller as the bias member returns to the resting position. 1. A media processing device having a housing , the media processing device comprising:a motorized media unit transporter configured to drive a media unit along a media processing path defined within the housing between an unprocessed media unit source and a processed media unit output;an auxiliary media unit transporter including a roller, a converter fixedly connected to the roller, and a bias member connected to the converter; [ receive the media unit from the motorized media unit transporter into engagement with the roller to drive the roller and the converter concurrently; and', 'via rotation of the converter, deform the bias member from a resting position to a primed position; and, '(i) in a first operating mode, 'initiated upon rotation of the converter in the first operating mode to a bias release position, propel the media unit by releasing the bias member from the primed position to drive rotation of the converter and the roller concurrently as the bias member returns to the resting position.', '(ii) in a second operating mode], 'the auxiliary media unit transporter configured ...

IMAGE FORMING APPARATUS AND CONVEYANCE CONTROL METHOD

An image forming apparatus includes: a transfer section that transfers an image onto a sheet; a sheet conveying member that conveys the sheet, the sheet conveying member being provided upstream of the transfer section in a sheet conveyance direction; and a hardware processor that controls displacement of the sheet conveying member so that the sheet is displaced along a width direction of the sheet. The hardware processor sets a displacement speed of the sheet conveying member for the sheet during transfer of the image by the transfer section to be lower than the displacement speed of the sheet conveying member for the sheet before the transfer of the image by the transfer section. 1. An image forming apparatus comprising:a transferrer that transfers an image onto a sheet;a sheet conveyer that conveys the sheet, the sheet conveyer being provided upstream of the transferrer in a sheet conveyance direction; anda hardware processor that controls displacement of the sheet conveyer so that the sheet is displaced along a width direction of the sheet,wherein the hardware processor sets a displacement speed of the sheet conveyer for the sheet during transfer of the image by the transferrer to be lower than the displacement speed of the sheet conveyer for the sheet before the transfer of the image by the transferrer.2. The image forming apparatus according to claim 1 , wherein the hardware processor sets the displacement speed of the sheet conveyer to be lower than a sheet conveyance speed in the transferrer.3. The image forming apparatus according to claim 2 , wherein the hardware processor sets the displacement speed of the sheet conveyer to be higher than a speed of deviation in the width direction of an end in the width direction of the sheet.4. The image forming apparatus according to claim 1 , wherein the hardware processor causes a drive source that transmits a drive force for the displacement to the sheet conveyer to operate at a frequency around a self-excitation ...

SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveying apparatus includes: a first pair of conveying rollers for conveying a sheet; a second pair of conveying rollers against which the leading edge of the sheet conveyed by the first pair of conveying rollers is hit and which conveys the sheet together with the first pair of conveying rollers by rotating after a loop is formed on the sheet; a separating portion for separating the first pair of conveying rollers; a first conveyance path for guiding the sheet; a second conveyance path which is a path different from the first conveyance path and guides the sheet; and a controller which changes a separation timing at which the first pair of conveying rollers is separated after the loop is formed on the sheet, depending on whether the sheet is guided by the first conveyance path or by the second conveyance path. 119-. (canceled)20. An image forming apparatus comprising:a first pair of conveying rollers configured to convey a sheet to a second pair of conveying rollers;the second pair of conveying rollers, which are configured to convey a sheet to a third pair of conveying rollers;the third pair of conveying rollers, which are configured to convey a sheet toward a transfer portion so that a leading edge of the sheet conveyed by the second pair of conveying rollers is abutted against the third pair of conveying rollers for forming a loop on the sheet;an image forming unit configured to form an image;a transfer portion configured to transfer the image to the sheet conveyed by the third pair of conveying rollers;a fixing unit configured to fix the image on the sheet;a separator configured to separate the second pair of conveying rollers; anda controller configured to control a timing for the separator to separate the second pair of conveying rollers after the loop is formed on the sheet based on a length of the sheet.21. The image forming apparatus according to claim 20 , wherein in a case of conveying a first sheet having a first length which is longer than a ...

SHEET CONVEYANCE APPARATUS, IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveyance apparatus includes a cover unit, a base unit, a roller unit configured to be detachable from the cover unit, and comprising a roller configured to convey the sheet along a conveyance path and a holder comprising an arm portion configured to extend in a width direction orthogonal to a sheet conveyance direction, a cam configured to swing the holder by rotating, and a cover member configured to be openable and closable with respect to the cover unit and configured to cover at least a portion of the arm portion against the conveyance path in a closed state, the cover member being opened by being pressed by the arm portion in a case where the roller unit is detached from the cover unit. 1. A sheet conveyance apparatus comprising:a cover unit comprising a first guide;a base unit configured to support the cover unit in an openable and closable manner, and comprising a second guide, the first guide and the second guide forming a conveyance path in a state where the cover unit is closed with respect to the base unit;a roller unit configured to be detachable from the cover unit, and comprising a roller configured to convey the sheet along the conveyance path and a holder configured to rotatably support the roller, the holder comprising an arm portion configured to extend in a width direction orthogonal to a sheet conveyance direction;a cam arranged on an outside of the conveyance path in the width direction and configured to abut against the arm portion, the cam being configured to swing the holder by rotating; anda cover member configured to be openable and closable with respect to the cover unit and configured to cover at least a portion of the arm portion against the conveyance path in a closed state, the cover member being opened by being pressed by the arm portion in a case where the roller unit is detached from the cover unit.2. The sheet conveyance apparatus according to claim 1 , wherein the cover unit comprises an engaged portion claim 1 ,the ...

IMAGE FORMING APPARATUS

An image forming apparatus includes a main body, a feeder, and a relay device. The main body forms an image on a sheet. The feeder feeds the sheet toward the main body. The relay device connects the main body to the feeder. The main body is placed on a placement surface. The feeder is arranged opposite to the main body with the relay device therebetween in a direction along the placement surface. The relay device includes a conveyance unit and a casing which houses the conveyance unit. The conveyance unit conveys the sheet fed from the feeder to the main body and rotates relative to the casing with an axis as a pivot thereof. The axis extends in a cross direction intersecting with the placement surface. 1. An image forming apparatus comprising:a main body configured to form an image on a sheet;a feeder configured to feed the sheet toward the main body; anda relay device connecting the main body to the feeder, whereinthe main body is placed on a placement surface,the feeder is arranged opposite to the main body with the relay device therebetween in a direction along the placement surface,the relay device includes a conveyance unit and a casing which houses the conveyance unit, and conveys the sheet fed from the feeder to the main body, and', 'rotates relative to the casing with an axis as a pivot thereof, the axis extending in a cross direction intersecting with the placement surface., 'the conveyance unit'}2. The image forming apparatus according to claim 1 , whereinthe conveyance unit includes an outward conveyance section configured to convey the sheet out to the main body in an outward conveyance direction, andthe outward conveyance section changes the outward conveyance direction according to a rotational angle by which the conveyance unit is rotated with the axis as a pivot thereof, and conveys the sheet out to the main body.3. The image forming apparatus according to claim 1 , whereinthe casing includes a shaft member extending in a direction along the axis, ...

SHEET CONVEYANCE APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveyance apparatus includes a shaft portion, a roller member, and a guide member. The roller member includes a hole portion with an opening through which the shaft portion is fitted with the hole portion. At least a part of the guide member is located upstream of an end of the shaft portion in an attaching direction of the roller member. The end of the shaft portion is located inside the opening of the hole portion when viewed in the attaching direction in a state where an outer circumferential surface of the roller member is in contact with the guide member at a position upstream of the end of the shaft portion in the attaching direction. 1. A sheet conveyance apparatus comprising:a shaft portion supported by an apparatus body;a roller member comprising an outer circumferential surface to contact the sheet and a hole portion, having an opening, to which the shaft portion is fitted, wherein the roller member is attached to the shaft portion through the opening along an axial line of the shaft portion; anda guide member configured to guide the roller member in an attachment operation of the roller member to the shaft portion,wherein at least a part of the guide member is located upstream of an end of the shaft portion in an attaching direction of the roller member, andwherein the guide member is configured to guide the roller member such that the end of the shaft portion is located inside the opening of the roller member when viewed in the attaching direction in a state where the outer circumferential surface of the roller member is in contact with the guide member at a position upstream of the end of the shaft portion in the attaching direction.2. The sheet conveyance apparatus according to claim 1 ,wherein the guide member is configured to guide the roller member such that a distance between rotation axes of the roller member and the shaft portion is smaller than a difference between a radius of the opening and a radius of the end of the shaft portion in ...

SHEET CONVEYANCE APPARATUS AND IMAGE FORMING APPARATUS

A sheet conveyance apparatus includes a conveyance portion including a rotary member and an opposing member and configured to convey a sheet in a conveyance nip, an abutting member configured to abut a surface of the rotary member, and a support portion, wherein the support portion supports the rotary member between a first position and a second position with respect to the abutting member, wherein when the sheet is not passing through the conveyance nip, the rotary member is positioned at the first position, and when the sheet is passing through the conveyance nip, the rotary member is positioned at the second position which is more separated from the opposing member than the first position by a thickness of the sheet, and wherein the abutting member abuts the rotary member regardless of which of the first position and the second position the rotary member is positioned at. 1. A sheet conveyance apparatus comprising:a conveyance portion comprising a rotary member and an opposing member and configured to convey a sheet in a conveyance nip, the opposing member being configured to oppose the rotary member to form the conveyance nip together with the rotary member;an abutting member configured to abut a surface of the rotary member; anda support portion configured to rotatably support the rotary member,wherein the support portion supports the rotary member such that the rotary member is relatively movable between a first position and a second position with respect to the abutting member,wherein when the sheet is not passing through the conveyance nip, the rotary member is positioned at the first position where the rotary member abuts the opposing member, and when the sheet is passing through the conveyance nip, the rotary member is positioned at the second position which is more separated from the opposing member than the first position by a thickness of the sheet passing through the conveyance nip, andwherein the abutting member abuts the rotary member regardless of ...

MOTOR CONTROLLER, MOTOR DRIVING APPARATUS, MOTOR DRIVING SYSTEM, IMAGE FORMING APPARATUS, AND CONVEYING DEVICE

A motor controller that controls a motor in a first control method based on a first current command value and a second control method based on a second current command value. The motor controller includes an analog-to-digital converter to generate the second current command value based on a reference signal externally input to the motor controller and a current limit generator to generate an upper limit value of the first current command value based on the second current command value. 1. A motor controller to control a motor comprising:a first current command value generator to generate a first current command value;an analog-to-digital converter to generate a second current command value based on a reference signal externally input to the motor controller; anda current limit generator to generate an upper limit value of the first current command value based on the second current command value,wherein the motor controller controls the motor in a first control method based on the first current command value and a second control method based on the second current command value.2. The motor controller according to claim 1 ,wherein the current limit generator generates the upper limit value by either multiplying the second current command value by a prescribed value or adding a prescribed value to the second current command value.3. The motor controller according to claim 1 , further comprising a command value switching unit to transition the second current command value to a first target value step by step and the first current command value to a second target value step by step during a switching period of time when the motor control method is switched from the first control method to the second control method.4. The motor controller according to claim 3 ,wherein the command value switching unit transitions the first current command value and the second current command value with an amplitude of a current supplied to the motor during the switching period equalized ...

MOTOR CONTROL APPARATUS, SHEET CONVEYING APPARATUS, DOCUMENT FEEDING APPARATUS, DOCUMENT READING APPARATUS, AND IMAGE FORMING APPARATUS

According to an aspect of the present invention, a motor control apparatus includes a first driving circuit connected to a motor first phase winding and having H bridge circuit first switching elements, a second driving circuit connected to second phase winding of the motor and having H bridge circuit second switching elements, first and second pulse generators. a detector, an estimator, and a selector. The first pulse generator generates a first PWM signal having a first level signal and a second level signal. The second pulse generator generates a second PWM signal having a first and a second level signal. The selector selects whether to detect a driving current flowing through the first phase winding or to estimate a driving current flowing through the first phase winding. The first pulse generator generates the first PWM signal based on a driving current value output from the detector or the estimator. 1. A motor control apparatus comprising:a first driving circuit configured to include a plurality of first switching elements of an H bridge circuit and to be connected to a winding of a first phase of a motor;a second driving circuit configured to include a plurality of second switching elements of the H bridge circuit and to be connected to a winding of a second phase of the motor;a first pulse generator configured to generate a first pulse width modulation (PWM) signal for controlling an ON operation and an OFF operation of the plurality of first switching elements, wherein the first PWM signal is constituted of a signal at a first level which is one of a high level and a low level and a signal at a second level which is another one of the high level and the low level;a second pulse generator configured to generate a second PWM signal for controlling an ON operation and an OFF operation of the plurality of second switching elements, wherein the second PWM signal is constituted of a signal at the first level and a signal at the second level and has a same cycle ...

Sheet conveying apparatus and image forming apparatus

A sheet conveying apparatus for conveying a sheet includes a conveyance roller, a motor, a phase determiner, and a controller. The phase determiner determines a rotor rotation phase of the motor that drives the conveyance roller to convey the sheet. The controller controls so that a value of a rotor torque current component becomes a target value of the torque current component and controls so that an excitation current component value becomes a target value of the excitation current component, and controls to reduce a deviation between a command phase and the determined rotation phase. The controller controls so that a magnetic flux penetrating through a winding is weaker than a magnetic flux of the rotor, and so that a magnetic flux penetrating through the winding in a second period is stronger than the magnetic flux penetrating through the winding in the first period.

Sheet Feeding Device and Image Forming Device

A sheet feeding device includes: a sheet stacking unit that stacks a bundle of sheets; a pick-up roller that is enabled to move up and down and sends a sheet of the bundle of sheets toward downstream side in a carrying direction; a pair of rollers that is arranged at downstream side in the carrying direction, and when multiple sheets are sent out by the pick-up roller, that separates the first sheet from the second sheet or later; a separation member that is arranged between the pick-up roller and the pair of rollers and that is in contact with a leading end of the sheet and limits the number of the sheet carried to the pair of rollers; and a hardware processor that determines a height position of the pick-up roller corresponding to a type of the sheet and sets the pick-up roller to be at the determined height position. 1. A sheet feeding device , comprising:a sheet stacking unit that is enabled to be lifted and lowered while a bundle of sheets is stacked;a pick-up roller that is in contact with a top surface of the bundle of sheets and is enabled to move up and down in accordance with the lifting and lowering movement of the sheet stacking unit, and that sends a sheet of the bundle of sheets toward downstream side in a carrying direction;a pair of rollers that is arranged at downstream side in the carrying direction of the pick-up roller, and when multiple sheets are sent out by the pick-up roller, that separates the first sheet from the second sheet or later and feeds the first sheet toward downstream side in the carrying direction, and restricts a movement of the second sheet or later;a separation member that is arranged between the pick-up roller and the pair of rollers and that is in contact with a leading end of the sheet that is sent out by the pick-up roller and limits the number of the sheet carried to the pair of rollers; anda hardware processor that determines a height position of the pick-up roller corresponding to a type of the sheet stacked on the ...

Image forming apparatus and sheet feeding apparatus

An image forming apparatus includes an apparatus body including an image forming unit, a unit detachably attached to the apparatus body, a first rotary member provided in the unit, a second rotary member provided in the apparatus body and configured to be coupled with and decoupled from the first rotary member by being moved in a rotation axial direction of the first rotary member, and a restriction member provided in the apparatus body and movable to a first position and a second position. The restriction member includes an engaging portion configured to engage with the second rotary member and is configured to move the second rotary member by the engaging portion so that the second rotary member is decoupled from the first rotary member along with a move of the restriction member from the first position to the second position.

IMAGING FORMING APPARATUS AND METHOD FOR CONTROLLING THE SAME

An image forming apparatus includes a first detector that detects an operation from which input of a start instruction for forming an image is predicted, a second detector that detects a human body, and a controller that controls starting a preparation operation even without input of the start instruction in a case where the operation is detected. The controller controls ending the preparation operation where the start instruction is not input even after a first predetermined time has passed since the start of the preparation operation and the second detector does not detect the human body, and controls continuing the preparation operation in a case where the start instruction is not input even after the first predetermined time has passed since the start of the preparation operation and the second detector detects the human body. 1. An image forming apparatus comprising:an image forming unit configured to form an image on a sheet;an input unit configured to receive an input of a start instruction for forming the image;a first detector configured to detect an operation from which the input of the start instruction is predicted;a second detector configured to detect a human body; anda controller configured to control the image forming unit to start a preparation operation for bringing the image forming unit into a state ready to form the image even without input of the start instruction in a case where the operation is detected by the first detector,wherein the controller controls the image forming unit to end the preparation operation in a case where the start instruction is not input even after a first predetermined time has passed since the start of the preparation operation and the second detector does not detect the human body, and controls the image forming unit to continue the preparation operation in a case where the start instruction is not input even after the first predetermined time has passed since the start of the preparation operation and the second ...

TRANSPORT DEVICE AND IMAGE FORMING APPARATUS

Provided is a transport device including a transport section by which a recording medium is interposed and is transported while rotating, a driving section that drives the transport section, a control section that performs control so that the recording medium enters a predetermined position of the transport section in a rotation direction, a detection section that detects a load of the driving section during a period of time in which the recording medium is transported by the transport section, and a derivation section that derives a thickness of the recording medium based on the load. 1. A transport device comprising:a transport section by which a recording medium is interposed and is transported while rotating;a driving section that drives the transport section;a control section that performs control so that the recording medium enters a predetermined position of the transport section in a rotation direction;a detection section that detects a load of the driving section during a period of time in which the recording medium is transported by the transport section; anda derivation section that derives a thickness of the recording medium based on the load.2. The transport device according to claim 1 ,wherein the detection section detects a peak value of the load of the driving section when the recording medium enters the transport section, andwherein the derivation section derives the thickness of the recording medium based on the peak value.3. The transport device according to claim 1 ,wherein the derivation section derives the thickness of the recording medium based on an amount of integration of the load during the period of time.4. The transport device according to claim 2 ,wherein the derivation section derives the thickness of the recording medium based on the amount of integration during a period that includes a time when the peak value is obtained in the period of time.5. An image forming apparatus comprising:an image forming section that forms an image on a ...

SHEET MATERIAL FEEDING APPARATUS

A sheet material feeding apparatus includes a first roll and a second roll arranged vertically below first roll to feed a sheet material clamped between the first roll and the second roll The sheet material feeding apparatus further includes a first motor provided with a rotatable first motor shaft coupled to the first roll and a second motor provided with a rotatable second motor shaft coupled to the second roll The first motor shaft and the second motor shaft rotate at substantially the same rotation speed to allow the first roll and the second roll to rotate in synchronization with each other. 1. A sheet material feeding apparatus , comprising:a housing;a first roll accommodated in the housing;a second roll accommodated in the housing and arranged vertically below the first roll;a first motor provided with a rotatable first motor shaft coupled to the first roll; anda second motor provided with a rotatable second motor shaft coupled to the second roll,wherein a sheet material is fed while clamped between the first roll and the second roll, andthe first motor shaft and the second motor shaft rotate at substantially the same rotation speed to allow the first roll and the second roll to rotate in synchronization with each other.2. The sheet material feeding apparatus according to claim 1 , whereina difference between a moment of inertia of the first roll and that of the second roll is 0.01% or less.3. The sheet material feeding apparatus according to claim 1 , further comprising:a control device that transmits a control signal to at least one of the first motor and the second motor to rotate the first roll and the second roll in synchronization with each other.4. The sheet material feeding apparatus according to claim 3 , whereinthe control device receives a signal of rotation speed of at least one of the first roll and the second roll to process the received signal of rotation speed.5. The sheet material feeding apparatus according to claim 1 , whereinthe first ...

SHEET TRANSPORT DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING APPARATUS

A sheet transport device includes a transport unit that transports a sheet to a reading position by a first transport roller, a driving unit that switches a rotating direction, a rotating unit that rotates the first transport roller in one direction, the rotating unit including a one-direction gear that directly meshes with a first planet gear when the driving unit rotates in a first direction and meshes with a second planet gear when the driving unit rotates in a second direction, a switch unit that switches between states in which rotation of the one-direction gear is or is not transmitted to the first transport roller, and a displacement-force applying part that applies a force for displacing the first planet gear to mesh with the one-direction gear when the first planet gear touches the switch unit. 1. A sheet transport device comprising:a transport unit that transports a sheet to a reading position by a first transport roller and transports the sheet to the first transport roller by switching back and inverting the sheet by a second transport roller after the sheet passes through the reading position;a single driving unit that switches a rotating direction thereof between first and second directions;a rotating unit that rotates the first transport roller in one direction regardless of the rotating direction of the driving unit, the rotating unit including a sun gear driven by the driving unit, first and second planet gears meshed with the sun gear, and a one-direction gear that directly meshes with the first planet gear when the driving unit rotates in the first direction and meshes with the second planet gear with an intermediate gear being disposed therebetween when the driving unit rotates in the second direction;a switch unit that switches between states in which rotation of the one-direction gear is transmitted and not transmitted to the first transport roller, the switch unit being disposed in one axial end portion of the one-direction gear and having a ...

DRIVING FORCE TRANSMITTING APPARATUS, SHEET CONVEYANCE APPARATUS, AND IMAGE FORMING APPARATUS

A driving force transmitting apparatus includes first and second planetary gear units and switching and urging members. The first planetary gear unit includes a first mesh gear and a first locked gear provided with first locked portions. The second planetary gear unit includes a second locked gear provided with second locked portions, and a second mesh gear meshing with the first mesh gear. The switching member includes first and second locking portions and can move to (i) a first stop position at which the first locking portion stop the first locked gear, and, urged by the urging member, (ii) a second stop position at which the second locking portion stops the second locked gear. An interval between the second locked portions in a rotational direction of the second locked gear is larger than an interval between the first locked portions in a rotational direction of the first locked gear. 1. A driving force transmitting apparatus comprising:a first planetary gear unit including a first locked gear provided with a plurality of first locked portions, and including a first mesh gear;a second planetary gear unit including a second locked gear provided with a plurality of second locked portions, and including a second mesh gear configured to mesh with the first mesh gear;a rotation switching member including a first locking portion and a second locking portion, wherein the rotation switching member is capable of moving to (i) a first stop position at which the first locking portion locks one of the plurality of first locked portions to stop the first locked gear, and (ii) a second stop position at which the second locking portion locks one of the plurality of second locked portions to stop the second locked gear; andan urging member configured to urge the rotation switching member to the second stop position,wherein an interval between the plurality of second locked portions in a rotational direction of the second locked gear is larger than an interval between the ...

Conveyance detection apparatus, conveying apparatus, and recording apparatus

Provided is a control unit of a conveying apparatus, the conveying apparatus including: a conveying unit that conveys recording paper along a conveyance path; and an imaging unit that images the recording paper, wherein the control unit detects conveyance information of the recording paper based on image information of a plurality of different regions in image information of the recording paper P imaged by the imaging unit.

Paper Sheet Conveyance Device

This paper sheet conveyance device () includes an upstream-side roller pair () and a downstream-side roller pair () as well as an upstream-side guide member () and a downstream-side guide member (). The upstream-side guide member is arranged to traverse a tangent () to the upstream-side roller pair extending along a conveyance direction, while the downstream-side guide member is arranged to traverse a tangent () to the downstream-side roller pair extending along the conveyance direction.

ROLLER SUPPORT MECHANISM, SHEET CONVEYING DEVICE INCLUDING ROLLER SUPPORT MECHANISM, IMAGE FORMING APPARATUS

A roller support mechanism includes a pair of support plates, concave groove portions, and sliding bearing portions. The support plates are formed from an elastic material and disposed to face each other. The concave groove portions are formed in the support plates and each include an opening portion, two arc rims, and a straight line rim. The arc rims extend in a groove depth direction of the concave groove portion from opposite ends of the opening portion. The straight line rim extends straightly and connects extention ends of the arc rims. The sliding bearing portions have bearing holes in which a rotation shaft of a roller member is inserted. In a state where the rotation shaft is inserted in the bearing holes, the sliding bearing portions are pressed into the concave groove portions so as to be in close contact with their inner circumferential surfaces and unrotatably attached to them. 1. A roller support mechanism comprising:a pair of support plates formed from an elastic material and disposed to face each other;two concave groove portions which are respectively formed in the pair of support plates and each of which includes an opening portion, two arc rims, and a straight line rim, the two arc rims extending in a groove depth direction of the concave groove portion from opposite ends of the opening portion, the straight line rim extending straightly and connecting extention ends of the two arc rims; andtwo sliding bearing portions respectively having bearing holes in which a rotation shaft of a roller member is inserted, wherein in a state where the rotation shaft is inserted in the bearing holes, the sliding bearing portions are pressed into the concave groove portions so that the sliding bearing portions are in close contact with inner circumferential surfaces of the concave groove portions and are unrotatably attached to the concave groove portions.2. The roller support mechanism according to claim 1 , whereinouter circumferential surfaces of the sliding ...

SHEET TRANSPORT DEVICE AND IMAGE FORMING APPARATUS

A sheet transport device includes a transport unit that transports a sheet, an endless belt that transmits a driving force from a motor to the transport unit, a rotary member that rotates by being pressed by the sheet transported by the transport unit, and a sensor that generates a signal in accordance with rotation of the rotary member. The rotary member is arranged in such a manner that a portion of the rotary member faces an inner peripheral portion of the endless belt. 1. A sheet transport device comprising:a transport unit that transports a sheet;an endless belt that transmits a driving force from a motor to the transport unit;a rotary member that rotates by being pressed by the sheet transported by the transport unit; anda sensor that generates a signal in accordance with rotation of the rotary member,wherein the rotary member is arranged in such a manner that a portion of the rotary member faces an inner peripheral portion of the endless belt.2. The sheet transport device according to claim 1 ,wherein the rotary member includes a shaft extending in an axial direction of the rotary member, andwherein the rotary member is arranged in such a manner that a portion of the shaft faces the inner peripheral portion of the endless belt.3. The sheet transport device according to claim 2 ,wherein the sensor is a photo-interrupter, a contact portion that projects from the shaft in a radial direction and that is brought into contact with the sheet, which is transported, and', 'a light-blocking portion that blocks an optical path of the photo-interrupter, and, 'wherein the rotary member includes'}wherein the contact portion and the light-blocking portion are arranged in such a manner that the endless belt is interposed between the contact portion and the light-blocking portion in the axial direction of the rotary member.4. The sheet transport device according to claim 1 ,wherein the sensor and the motor are arranged in such a manner as to oppose a transport region in which ...

CARD PROCESSING DEVICE

A card processing device may include a print unit and a card inverting unit that inverts front/rear of the card. The print unit may include a thermal head and a card conveyance mechanism. The card inverting unit may include a card holding part, a card drawing and feeding mechanism, and a rotating mechanism that rotates the card holding part. A conveyance path may be provided inside the card holding part. The conveyance path may be linear. The card drawing and feeding mechanism may include two drive rollers, and two pad rollers. A distance between a center of the drive roller and a center of the thermal head may be shorter than a length of the card. The thermal head may print on the card while the card conveyance mechanism conveys the card. The rotating mechanism may rotate the card holding part such that the conveyance path is inclined. 1. A card processing device for use with a card , the card processing device comprising:a print unit that prints on the card; anda card inverting unit that inverts front/rear of the card, whereinthe print unit comprises a thermal head structured to heat an ink ribbon and transfer ink of the ink ribbon to print on the card, and a card conveyance mechanism structured to convey the card,when a conveyance direction of the card conveyed by the card conveyance mechanism is defined as a first direction, a thickness direction of the card conveyed by the card conveyance mechanism is defined as a second direction, a direction orthogonal to the first direction and the second direction is defined as a third direction, one side in the first direction is defined as a fourth direction side, and the other side opposite to the fourth direction side is defined as a fifth direction side,the card inverting unit comprises a card holding part structured to temporarily hold the card therein, a card drawing and feeding mechanism structured to draw the card into the card holding part and feed the card out of the card holding part, and a rotating mechanism ...

IMAGE FORMING APPARATUS, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM

An image forming apparatus forms an image designated by a job on a sheet fed from one of paper feed sources. Detection unit for detecting paper types of sheets respectively fed from the paper feed sources is provided on a conveyance path used in common for the fed sheets, and the detected paper types are held in one-to-one correspondence with the paper feed sources. The apparatus also hold a job-designated paper size and a job-designated paper type or a condition related to setting of a paper type. If the job includes the condition, a paper feed source that satisfies the condition is selected with reference to the paper sizes and the paper types set by the user and/or the paper types detected by the detection unit in one-to-one correspondence with the paper feed sources. 1. An image forming apparatus for forming an image designated by a job on a sheet fed from one of a plurality of paper feed sources , the image forming apparatus comprising:a detection unit that detects paper types of sheets respectively fed from the plurality of paper feed sources when the sheets are conveyed, the detection unit being provided on a conveyance path used in common for the fed sheets;a memory device that stores a set of instructions; and a first holding unit configured to hold paper sizes and paper types that are set by a user in one-to-one correspondence with the plurality of paper feed sources;', 'a second holding unit configured to hold the paper types detected by the detection unit in one-to-one correspondence with the plurality of paper feed sources;', 'a third holding unit configured to hold a paper size designated by the job and a paper type designated by the job or a condition related to setting of a paper type;', 'a first selection unit configured to, when the third holding unit holds the paper size and the paper type designated by the job, select, from among the plurality of paper feed sources, a paper feed source loaded with sheets having the paper size and the paper type ...