PAIR OF MOTOR VEHICLE TYRES

A pair of motor vehicle tyres includes a front tyre and a rear tyre to be mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle, each tyre of the pair having a tread band extending around an axis of rotation. The tread band of the front tyre includes a central annular portion straddling an equatorial plane and two annular shoulder portions disposed on axially opposite sides of the central annular portion. The central annular portion includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane in such a way as to form a concavity directed toward the equatorial plane. Each shoulder portion includes a plurality of second grooves isolated from the first grooves and extending substantially transversally so as to form an average inclination with the equatorial plane greater than 90°. The tread band of the rear tyre includes instead a module which is replicated along a direction of circumferential development of the tyre, the module including: at least one first pair of first grooves inclined in opposite directions with respect to the equatorial plane of the tyre; each first groove of the first pair extending along a portion of the tread band between the equatorial plane and a respective shoulder and forming an average inclination less than 60° with the equatorial plane. 118-. (canceled)19. A pair of motor vehicle tyres , comprising a front tyre and a rear tyre capable of being mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle , each tyre of the pair having a tread band extending around an axis of rotation and having a tread pattern such as to define overall a void to rubber ratio less than 10% , and locally , in an annular central sub-portion straddling a respective equatorial plane of each tyre of the pair , a void to rubber ratio substantially equal to zero , wherein:the tread pattern of the tread band of the front tyre comprises a central annular ...

METHOD AND APPARATUS FOR MANUFACTURING TYRES

A green tyre is built on a rigid toroidal support externally having a forming surface of a conformation corresponding to the inner conformation of the tyre. The built tyre is removed from the rigid toroidal support and engaged on an expandable toroidal support comprising a bladder. The green tyre engaged on the expandable toroidal support is introduced into a vulcanization mould and submitted to a vulcanization cycle. 145-. (canceled)46. An apparatus for manufacturing tyres , comprising:at least one rigid toroidal support externally having a forming surface of a conformation corresponding to an inner conformation of a built green tyre;devices for building a green tyre on the rigid toroidal support;at least one expandable toroidal support comprising at least one bladder;devices for removing a built green tyre from the rigid toroidal support;devices for engaging the built green tyre on the expandable toroidal support;devices for introducing the built green tyre engaged on the expandable toroidal support into a vulcanisation mould; anddevices for curing the tyre enclosed in the vulcanisation mould.47. The apparatus as claimed in claim 46 , wherein the rigid toroidal support is made up of a plurality of removably-engaged circumferential sectors disposed in mutual circumferential alignment relationship.48. The apparatus as claimed in claim 46 , wherein said forming surface is substantially exempt from concavities or undercuts.49. The apparatus as claimed in claim 46 , wherein the rigid toroidal support has bead seats axially spaced apart by a distance greater than 95% of the maximum axial distance measurable between axially opposite portions of the forming surface in parallel with a geometric axis of the toroidal support itself.50. The apparatus is claimed in claim 46 , wherein said bladder has a main portion in the form of a layer made of elastomeric material substantially devoid of reinforcing inserts.51. The apparatus as claimed in claim 46 , wherein the expandable ...

Method and apparatus for manufacturing pneumatic tyres

A green pneumatic tyre is built on a rigid toroidal support externally having a forming surface of a conformation corresponding to the inner shape of a tyre. The green tyre engaged on the expandable toroidal support is introduced into a vulcanisation mould and submitted to a vulcanisation cycle. During vulcanisation, axial moving apart of side portions of the toroidal support is caused so as to press the beads and sidewalls of the tyre against the vulcanisation mould.

MOTORCYCLE TYRE AND PAIR OF MOTORCYCLE TYRES

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre. 130-. (canceled)31. A motorcycle tyre comprising a tread band comprising a central portion and two shoulder portions arranged at axially opposite sides of the central portion , wherein:the central portion comprises a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of an equatorial plane of said tyre, wherein each groove of said first plurality of grooves has a substantially curvilinear course thereby forming a concavity;the central portion comprises a sub-portion substantially free of grooves placed astride an equatorial plane of said tyre;each of said shoulder portions comprises a second plurality of grooves arranged obliquely relative to the equatorial plane of said tyre; andsaid second plurality of grooves comprises a set of groove pairs, wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of said first plurality of grooves.32. The tyre according to claim 31 , wherein at least one extension of each groove pair of said second plurality of grooves intersects the groove of said first plurality of grooves at a portion spaced apart from the ends of the groove of said first plurality of grooves.33. The tyre according ...

MOTORCYCLE TYRE AND PAIR OF MOTORCYCLE TYRES

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre. 130-. (canceled)31. A motorcycle tyre comprising a tread band comprising a central portion and two shoulder portions arranged at axially opposite sides of the central portion , wherein:the central portion comprises a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of an equatorial plane of said tyre, wherein each groove of said first plurality of grooves has a substantially curvilinear course thereby forming a concavity;the central portion comprises a sub-portion substantially free of grooves placed astride an equatorial plane of said tyre;each of said shoulder portions comprises a second plurality of grooves arranged obliquely relative to the equatorial plane of said tyre;the concavity of the grooves of said first plurality of grooves is directed according to a direction opposite to the equatorial plane of said tyre; andthe second plurality of grooves comprises a set of groove pairs, wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of said first plurality of grooves.32. The tyre according to claim 31 , wherein at least one extension of each groove pair of said second plurality of grooves intersects a groove of ...

TYRE FOR MOTORCYCLES

A tyre for motorcycles, having a tread band includes a central annular portion, two lateral annular portions and two shoulder annular portions. The axial extension of these portions is not greater than 25%, 35%, and 20% of the axial development of the tread band, respectively. The tread band includes a module repeated along the circumference of the tyre in which at least two substantially longitudinal grooves, mainly extending in the lateral annular portions, include, moving axially away from the equatorial plane of the tyre, at least three substantially straight and substantially consecutive segments, wherein the first segment forms an angle with respect to the equatorial plane greater than 150°; and the second segment has a length measured along its extension smaller than the length of the first segment. 122-. (canceled)23. A tyre for motorcycles , having a tread band comprising a central annular portion symmetrically located astride an equatorial plane; two lateral annular portions located on axially opposite sides with respect to the central annular portion; and two shoulder annular portions located on axially opposite sides with respect to the lateral annular portions ,the central annular portion having an axial extension not greater than 25% of an axial development of the tread band;each shoulder annular portion having an axial extension not greater than 20% of the axial development of the tread band;each lateral annular portion having an axial extension not greater than 35% of the axial development of the tread band;the tread band comprising a plurality of grooves adapted to define a tread pattern, the grooves of the tread pattern altogether defining a void-to-rubber ratio lower than 8% on said tread band; at least two substantially longitudinal grooves oppositely inclined with respect to the equatorial plane of the tyre, wherein:', 'the first substantially longitudinal grooves mainly extend in the lateral annular portions and comprise, moving axially away ...

MOTORCYCLE TYRE

It is described a motorcycle tyre () intended to be fitted to a wheel of a motorcycle of the “supersport” segment, comprising an equatorial plane and a tread band extending in axial direction with a given axial development, wherein the tread band comprises a first annular portion made of a first elastomeric material, having a first dynamic shear storage modulus measured at 70° C., and at least one second annular portion made of a second elastomeric material, having a second dynamic shear storage modulus measured at 70° C., different form said first dynamic shear storage modulus measured at 70° C. 123-. (canceled)24. A motorcycle tyre comprising an equatorial plane (X-X) and a tread band having an axial development , wherein:the tread band comprises at least one first annular portion made of a first elastomeric material having a first dynamic shear storage modulus measured at 70° C., and at least one second annular portion made of a second elastomeric material having a second dynamic shear storage modulus measured at 70° C. different from the first dynamic shear storage modulus;the at least one first annular portion is located in a tread band region at a distance from the equatorial plane (X-X) equal to at least 25% of the axial development;the at least one second annular portion is adjacent and axially proximal to the at least one first annular portion and defines a first interface dividing the at least one first annular portion from the at least one second annular portion in the axial direction;the tread band further comprises a plurality of grooves and a void-to-rubber ratio at the first interface which increases along the axial development from the at least one first annular portion to the at least one second annular portion;the void-to-rubber ratio at the first interface is greater than or equal to 3% and less than or equal to 15%.25. The motorcycle tyre according to claim 24 , wherein the void-to rubber ratio at the first interface is greater than or equal to 3 ...

Tyre for motorcycles

A tyre for motorcycles includes a carcass structure, a belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt structure. The belt structure is of the zero degree type and includes at least one reinforcing cord including a core made of non metal material, and a plurality of metal wires substantially parallel to one another and helically wound around the core with a predetermined winding pitch. The metal wires are in such a number as to not completely surround the core. In particular, the metal wires are arranged around the core so that, in any cross-section of the reinforcing cord, they are located at just an angular portion of an ideal circumference that circumscribes the core. 116-. (canceled)18. The tyre according to claim 17 , wherein said angular portion is defined by an angle between about 40° and about 270°.19. The tyre according to claim 17 , wherein a diameter of said core claim 17 , a diameter of said metal wires and the winding pitch of said metal wires are selected so that the metal wires are inclined with respect to said substantially circumferential direction by an angle between 10° and 40°.20. The tyre according to claim 17 , wherein the plurality of metal wires comprises between two and eight metal wires.21. The tyre according to claim 17 , wherein the plurality of metal wires comprises five metal wires.22. The tyre according to claim 17 , wherein a diameter of said metal wires is between about 0.12 mm and about 0.35 mm.23. The tyre according to claim 17 , wherein said metal wires are in a condition of substantially mutual contact.24. The tyre according to claim 17 , wherein said at least one reinforcing cord has a diameter between about 0.5 mm and about 2.5 mm.25. The tyre according to claim 17 , wherein said winding pitch is between about 3 mm and about 16 mm.26. The tyre according to claim 17 , wherein said at least one reinforcing ...

TYRE FOR MOTORCYCLES

Tyre for motorcycles, having a tread band includes a central annular portion symmetrically located astride an equatorial plane and two shoulder annular portions located on axially opposite sides with respect to the central annular portion. The tread band has a void-to-rubber ratio not greater than 25%. The central annular portion has an axial extension not greater than 65% of the axial development of the tread band and the central portion has at least one module circumferentially repeated. Each shoulder portion has an axial extension not greater than 40% of the axial development of the tread band and the module includes at least one pair of first grooves with substantially circumferential course, at least partially located on opposite sides with respect to the equatorial plane. The central annular portion has a void-to-rubber ratio not smaller than 10% and the module includes a plurality of second grooves located substantially transversally with respect to the equatorial plane. The substantially transverse second grooves define in each module together with said first grooves at least two tread band solid portions. The second grooves have at least one end spaced away from the adjacent first groove by a distance so as to form a substantially continuous tread portion adapted to connect at least two tread band solid portions. 128-. (canceled)29. A tyre for motorcycles , having a tread band comprising a central annular portion symmetrically located astride an equatorial plane and two shoulder annular portions located on axially opposite sides with respect to the central annular portion ,the tread band having a void-to-rubber ratio not greater than 25%;the central annular portion having an axial extension not greater than 65% of the axial development of the tread band and said central portion having at least one module circumferentially repeated;each shoulder portion having an axial extension not greater than 40% of the axial development of the tread band; and the central ...

TYRE FOR BICYCLE WHEELS

The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre () for bicycle wheels comprising:—a carcass structure (); and—a tread band () arranged in a radially outer position with respect to said carcass structure (); characterised in that said tread band () is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer () is interposed between said carcass structure () and said tread band (), said protective layer () comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres. 120-. (canceled)21. A tyre for bicycle wheels comprising:a carcass structure;a tread band arranged in a radially outer position with respect to the carcass structure with a vulcanized elastomeric material, wherein the vulcanized elastomeric material comprises, before vulcanization, a vulcanizable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions; and a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°;', 'a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20° or', 'a non-woven fabric with randomly oriented textile fibres., 'at least one protective layer interposed between the carcass structure and the tread band, wherein the protective layer comprises22. The tyre according to claim ...

PROCESS AND APPARATUS FOR BUILDING TYRES

A carcass ply is applied around an outer surface of a building drum according to an application diameter larger than the fitting diameter of a tyre. Coaxially engaged around each of the end flaps is an annular anchoring structure defining the fitting diameter. A pair of sidewalls is manufactured by laying of a continuous elongated element in the form of approached coils on the carcass sleeve. An outer sleeve, including at least one belt structure possibly associated with a tread band, is coaxially centered around the carcass sleeve. Through axial approaching of two halves forming the building drum, the carcass sleeve is shaped into a toroidal configuration to determine application of same against a radially internal surface of the outer sleeve. 1. An apparatus for building a tyre , comprising:a building drum comprising two axially approachable halves and having an outer circumferential surface defining an application diameter;devices for applying at least one carcass ply having axially opposite end flaps around an outer circumferential surface of the building drum;devices for engaging an annular anchoring structure with a fitting diameter smaller than said application diameter coaxially around each of the end flaps of said at least one carcass ply, so as to make a carcass sleeve;devices for forming at least one pair of sidewalls around the carcass sleeve, by laying of at least one first continuous elongated element in the form of approached coils;at least one pair of auxiliary support members, each having at least one circumferential rest surface extending in a continuation of the outer circumferential surface of the building drum to support at least the axially opposite end flaps of said at least one carcass ply, being removably engaged with the building drum, and being in axially approached relationship with a respective half of the building drum,wherein each auxiliary support member is removably engaged with the building drum at least at a connecting member ...

TYRE FOR BICYCLE WHEELS

The present invention refers to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of having high resistance to the penetration of foreign bodies, simultaneously ensuring optimal handling performances. In particular the present invention regards a tyre for bicycle wheels comprising: a carcass structure; and —a tread band arranged in radially outer position with respect to the carcass structure; wherein said tread band is made by means of vulcanisation of a cross-linkable elastomeric composition comprising a reinforcement system constituted by modified silicate fibres of nanometric size and fibrillated polymer fibres of micrometric size. 1100. A tyre () for bicycle wheels comprising:{'b': '2', 'a carcass structure (); and'}{'b': 7', '2, 'a tread band () arranged in radially outer position with respect to said carcass structure ();'}{'b': '7', 'wherein said tread band () is made by means of vulcanisation of a cross-linkable elastomeric composition comprising a reinforcement system comprising modified silicate fibres of nanometric size and fibrillated polymer fibres of micrometric size.'}2100. The tyre () according to claim 1 , characterised in that said modified silicate fibres have a diameter lower than 500 nm and a length lower than 10 μm.3100. The tyre () according to claim 1 , characterised in that said modified silicate fibres show an aspect ratio between the length and the diameter of at least 2:1.4100. The tyre () according to claim 1 , characterised in that said modified silicate fibres derive from silicate fibres selected from the group which consists of sepiolite fibres claim 1 , palygorskite or attapulgite fibres claim 1 , halloysite fibres claim 1 , wollastonite fibres claim 1 , possibly organically modified claim 1 , and mixtures thereof.5100. The tyre () according to claim 4 , characterised in that said modified silicate fibres derive from silicate fibres selected from the group which consists of sepiolite fibres ...

PROCESS FOR MANUFACTURING A TYRE AND TOROIDAL SUPPORT FOR CARRYING OUT SAID PROCESS

A process for manufacturing a tyre by the steps of producing and assembling the tyre structural elements on a toroidal support to form a green tyre, and the step of precuring at least an inner surface of the green tyre by heating the toroidal support. The radially inner surface of the toroidal support is provided with a plurality of protruding elements to reduce the time required for the outer surface of the toroidal support to reach a temperature which is suitable for ensuring a uniform and homogeneous precuring of the inner surface of the green tyre, preferably of the inner surface and the bead regions of the green tyre. 147-. (canceled)48. A toroidal support for manufacturing a green tyre thereupon , the support comprising a plurality of circumferential sectors defining an outer surface of the toroidal support , said outer surface having a shape which substantially matches the shape of an inner surface of said green tyre , wherein at least a portion of a radially inner surface of the toroidal support is provided with a plurality of protruding elements.49. The toroidal support according to claim 48 , wherein the protruding elements are in the form of elongated ribs.50. The toroidal support according to claim 48 , wherein the protruding elements define a honeycomb structure.51. The toroidal support according to claim 48 , wherein the protruding elements protrude inwardly the toroidal support.52. The toroidal support according to claim 48 , wherein the protruding elements are obtained in a thickness of the toroidal support.53. The toroidal support according to claim 48 , wherein the protruding elements are produced separately from the toroidal support and successively coupled to the radially inner surface thereof.54. The toroidal support according to claim 53 , wherein the coupling of the protruding elements to the toroidal support is performed by welding.55. The toroidal support according to claim 48 , wherein the protruding elements are distributed on the radially ...

Tyre for motorcyle wheels

A motorcycle tyre intended to be fitted to the rear wheel of a motorcycle. The motorcycle tyre has a tread pattern with a high void-to-rubber ratio that provides a suitable draining. The tread pattern has pairs of primary grooves to carry out the draining function of the tyre, and arranged substantially according to the stress lines of the tyres to reduce the probability of triggering uneven wear. Also included are secondary grooves having a reduced dimension, in terms of both extension and width, arranged between the primary grooves to increase the grip of the tyre to the ground. Orientation of the secondary grooves increases stabilizing features against drift forces acting on the tyre, particularly in low or very low friction conditions.

MOTORCYCLES TYRE

Motorcycles tyre including a carcass structure, a zero-degree belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt structure. The belt structure includes at least one hybrid reinforcing cord that has an elongation greater than 4% when subjected to a load equal to about 50 N and a tangent modulus with a monotonic progression as the elongation increases for elongations comprised between 4% and at least 9%. 1. A motorcycles tyre , comprising a carcass structure , a zero-degree belt structure arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the zero-degree belt structure , wherein the zero-degree belt structure comprises at least one hybrid reinforcing cord having an elongation greater than 4% when subjected to a load equal to about 50 N and a tangent modulus with a monotonic progression as the elongation increases for elongations comprised between 4% and at least 9%.2. The motorcycles tyre according to claim 1 , wherein said carcass structure is a radial carcass structure.3. The motorcycles tyre according to claim 2 , wherein claim 2 , when said at least one hybrid reinforcing cord is subjected to a load comprised between about 10 N and about 50 N claim 2 , said elongation is comprised between about 1% and about 7%.4. The motorcycles tyre according to wherein claim 3 , when said at least one hybrid reinforcing cord is subjected to a load equal to about 20 N claim 3 , said elongation is greater than 2%.5. The motorcycles tyre according to claim 4 , wherein claim 4 , when said at least one hybrid reinforcing cord is subjected to loads comprised between about 50 N and about 130 N claim 4 , said elongation is comprised between about 5.5% and about 10.5%.6. The motorcycles tyre according to claim 5 , wherein claim 5 , when said at least one hybrid reinforcing ...

Motorcycles tyre

Motorcycles tyre, comprising: a radial carcass structure ( 2 ); a belt structure ( 6 ) applied in radially outer position with respect to the radial carcass structure ( 2 ); a tread band ( 8 ) applied in radially outer position with respect to the belt structure ( 6 ). The tyre ( 1 ) has a curvature ratio (f/C) greater than or equal to about 0.25. The tread band ( 8 ) comprises: a plurality of blocks ( 14 ) mutually spaced so as to define a tread pattern with a void/solid ratio (1-Sb/St) comprised between about 25% and about 50%; transverse grooves ( 11 ) placed in succession along the circumferential extension of the tyre ( 1 ) and each substantially extending over the entire axial width of the tread band ( 8 ). Each transverse groove ( 11 ) substantially extends along an axial direction. Two successive transverse grooves ( 11 ) circumferentially delimit an assembly ( 12 ) of blocks ( 14 ) placed in succession over the entire axial width of the tread band ( 8 ). Circumferential grooves ( 13 ) delimit the blocks ( 14 ) of an assembly ( 12 ). A ratio between a circumferential length (LI) of the blocks ( 14 ) and a width (L 2 ) of the transverse grooves ( 11 ) is equal to or greater than about 2.

TYRE FOR BICYCLE WHEELS

A tyre for bicycle wheels, having a carcass structure, a belt layer arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt layer. The carcass structure has a carcass ply engaged with a pair of annular anchoring structures and including a plurality of reinforcing cords. The cords are inclined, with respect to an equatorial plane of the tyre, at a first angle between about 65° and about 90°. The belt layer has a reinforcing cord wound onto the carcass structure according to a winding direction oriented, with respect to the equatorial plane, at a second angle between about 0° and about 30°. 1. A tyre for bicycle wheels , comprising:a carcass structure;at least one belt layer arranged in a radially outer position with respect to the carcass structure;a tread band arranged in a radially outer position with respect to the belt layer;wherein the carcass structure comprises at least one carcass ply engaged, at axially opposite end edges thereof, with a pair of annular anchoring structures and including a plurality of reinforcing cords inclined, with respect to an equatorial plane of the tyre, at a first angle comprised between about 65° and about 90°, inclusive;wherein said at least one belt layer comprises at least one reinforcing cord wound on the carcass structure according to a winding direction oriented, with respect to said equatorial plane, at a second angle comprised between about 0° and about 30°, inclusive.2. The tyre according to claim 1 , wherein said at least one reinforcing cord of said at least one belt layer is wound in a spiral on the carcass structure according to said winding direction.3. The tyre according to claim 1 , wherein said at least one belt layer comprises a plurality of parallel reinforcing cords claim 1 , each reinforcing cord being wound on the carcass structure according to said winding direction.4. The tyre according to claim 1 , wherein ...

TYRE FOR MOTORCYLE WHEELS

A tyre that can be fitted to the front of a motorcycle. The tyre has a high void-to-rubber ratio and includes grooves located asymmetrically across the equatorial plane of the tyre, arranged substantially orthogonally to the equatorial plane of the tyre at the equatorial plane itself. According to one aspect, the grooves are close to one another in the circumferential direction of the tyre to increase their number in a footprint area of the tyre. 119.-. (canceled)20. A motorcycle tyre , comprising:an equatorial plane; anda tread band comprising a plurality of grooves that define a tread pattern, the tread pattern comprising a module repeated along a direction of circumferential development of the tyre, the module comprising at least two first grooves oppositely inclined relative to the equatorial plane; the plurality of grooves of the tread band overall provide a void-to-rubber ratio greater than or equal to 9%;', 'said at least two first grooves have a length, measured along their extension, equal to or greater than 30% of the width of the tread band;', 'said at least two first grooves have a first inclination angle relative to the equatorial plane that decreases, at least partially, monotonically, for said at least two first grooves moving away from the equatorial plane;', 'said at least two first grooves comprise a first segment located across the equatorial plane, the first segment having first segment inclination angles, relative to the equatorial plane, in a range between 50° and 90°,', 'said at least two first grooves comprise a second segment consecutively located relative to the first segment, and', 'a distance between two circumferentially consecutive first grooves at the equatorial plane is equal to or smaller than 2% of the circumferential development., 'wherein21. The motorcycle tyre according to claim 20 , wherein:the first segment is located within an annular portion of the tread band identified by ends of said first grooves that are closer to the ...

PROCESS AND PLANT FOR BUILDING TYRES FOR VEHICLE WHEELS

A plant for building tyres of at least two different models for vehicle wheels, includes at least a tyre building line, which in turn, includes: a plurality of work stations arranged according to a sequential series, each work station being adapted for building at least one structural component of each tyre and assembling at least one elementary component; at least one handling device for the tyres being processed on the respective forming supports associated to each work station; and at least one transfer device adapted for transferring the tyre being processed on its forming support from any first work station of the sequential series to any other second work station not adjacent thereto of the sequential series, so that the tyre being processed on its forming support only passes in the first and second work stations. 151-. (canceled)52. A method for selecting work stations in a tyre building line for different models of tyres , wherein the building line comprises carcass structure building work stations and belt building work stations , and each work station is adapted for building at least one structural component of the different models of tyres , the method comprising:selecting a first belt building work station of the belt building work stations based on a first model of tyre;selecting a second belt building work station of the belt building work stations based on a second model of tyre different from the first model of tyre;transferring and releasing, by a robotized arm, a first forming support holding the first model of tyre from a first carcass structure building work station to the first belt building work stations, wherein the transfer and release of the first forming support occurs at the same time as the building of a second carcass structure of the second model of tyre held by a second forming support in a second carcass structure building work station;transferring and releasing, by the robotized arm, the second forming support holding the second ...

PROCESS AND PLANT FOR BUILDING TYRES

A plant for building tyres, includes: a shaping work station configured for receiving a carcass sleeve; at least one radially expandable/contractible toroidal forming drum engageable in the shaping work station; at least one work station configured for building at least one component of a crown structure on a radially external surface of a tyre being processed, defined starting from the carcass sleeve that is shaped and coupled to the forming drum; transfer devices configured for moving said forming drum along a closed-loop completion path and arranging it in proximity to the work station in order to obtain a green tyre, the closed-loop completion path being extended from an initial work station to a final work station coinciding with the shaping work station; and a pick-up device configured for picking up said green tyre decoupled from the respective forming drum. 137-. (canceled)38. A process for building tyres comprising:arranging a carcass sleeve in a shaping work station;toroidally shaping said carcass sleeve and coupling said carcass sleeve to a radially expandable/contractible toroidal forming drum defining a tyre being processed;moving said forming drum along a closed-loop completion path having an initial work station and a final work station coinciding with said shaping work station;building, along said closed-loop completion path, each component of a corresponding crown structure of the tyre being processed in a radially external position with respect to the aforesaid tyre being processed, thereby obtaining a green tyre;decoupling said green tyre from said forming drum; andpicking up said green tyre.39. The process for building tyres as claimed in claim 38 , wherein decoupling said green tyre from said forming drum occurs in said shaping work station claim 38 , at the end of the closed-loop completion path completed by said forming drum.40. The process for building tyres as claimed in claim 38 , wherein picking up said green tyre occurs in said shaping ...

Method and Apparatus for Manufacturing Tyres

A green tyre is built on a rigid toroidal support externally having a forming surface of a conformation corresponding to an inner conformation of the tyre. The built tyre is removed from the rigid toroidal support and engaged on an expandable toroidal support which includes a bladder. The green tyre engaged on the expandable toroidal support is introduced into a vulcanisation mould and submitted to a vulcanisation cycle.

Tyre for motor vehicles

Method and apparatus for manufacturing pneumatic tyres

A green pneumatic tyre is built on a rigid toroidal support externally having a forming surface of a conformation corresponding to the inner shape of a tyre. The green tyre engaged on the expandable toroidal support is introduced into a vulcanisation mould and submitted to a vulcanisation cycle. During vulcanisation, axial moving apart of side portions of the toroidal support is caused so as to press the beads and sidewalls of the tyre against the vulcanisation mould.

Tyre for two -wheeled vehicle and process for manufacturing the same

Method and apparatus for manufacturing pneumatic tyres

A green tyre (50) disposed on a toroidal support (10) is introduced into a vulcanisation mould (102). The mould (102) is closed through axial approaching of a pair of sidewall plates (130a, 130b) acting against the sidewalls (51) of the tyre (50). Circumferential sectors (140) set to operate against the tyre tread band (52) are maintained spaced apart from the tread band itself during admission of a working fluid designed to press the tyre (50) against the toroidal support (10). Subsequently, said sectors are centripetally approached for penetration into the tread band (52) concurrently with a step of full moulding and vulcanisation of the tyre (50) carried out through admission of steam under pressure into the tyre itself.

Tyre for bicycle wheels

Tyre for two -wheeled vehicle and process for manufacturing the same

Belt structure (2) for two-wheeled vehicle made by means of strip-like segments or elements (15) each comprising parallel cords embedded in an elastomeric layer, sequentially laid along the circumferential extension of a toroidal support (3) so as to form a reinforcing layer (2) having a continuous circumferential extension around a geometric rotation axis (X-X) of said toroidal support (3), wherein - each strip-like element (15) is laid in a laying trajectory (T) defining, at each point, a laying angle (α); - at each point of the laying trajectory (T) a laying gap (Δg) is formed between adjacent strip-like elements (5); - said laying trajectory (T) is formed starting from preselected laying angles on the shoulder (αsp) and on the crown (αc) of the tyre; - the laying gap (Δg) between adjacent strip-like elements (5) varies along at least one length of said laying trajectory (T) between crown and shoulder so as to cause variation of said laying angle (α) and obtain said preselected angles on the shoulder (αsp) and on the crown (αc).

Motorcycle tyre

A motorcycle tire includes: a tread band with a tread pattern including, in a zone symmetrically arranged on either side of the equatorial plane, a first module repeatedly duplicated in a direction of circumferential extension of the tire. The module has at least two first longitudinal grooves inclined in an oppositely arranged manner relative to the equatorial plane; and at least two substantially transverse grooves designed to intersect the two longitudinal grooves so as to define at least one block. The zone has a width in the axial direction of between 20% and 65% of the width of the tread band and a solids/voids ratio equal to at least 0.20. The tread pattern also has at least one substantially transverse continuous portion which extends over the entire width of the tread band delimiting at least one end of the module in the circumferential direction.

tire and process to manufacture a tire

pneu, e, processo para fabricar um pneu é descrita uma estrutura de correia (2) para veículo de duas rodas feita por meio de segmentos ou elementos (15) tipo tira, cada qual compreendendo cordões paralelos embutidos em uma camada elastomérica, sequencialmente dispostos ao longo da extensão circunferencial de um suporte toroidal (3), de maneira a formar uma camada de reforço (2) com uma extensão circunferencial contínua em torno de um eixo geométrico de rotação (x-x') do dito suporte toroidal (3), em que: cada elemento tipo tira (15) é disposto em uma trajetória de assentamento (t) definindo, em cada ponto, um ângulo de assentamento (a); em cada ponto da trajetória de assentamento (t) uma folga de assentamento (?g) é formada entre elementos tipo tira adjacentes (5); a dita trajetória de assentamento (t) é formada a começar pelos ângulos de assentamento pré-selecionados no ressalto (asp) e na coroa (ac) do pneu; a folga de assentamento (?g) entre elementos tipo tira adjacentes (5) varia ao longo de pelo menos um comprimento da dita trajetória de assentamento (t) entre a coroa e o ressalto de maneira a causar uma variação do dito ângulo de assentamento (a) e obter os ditos ângulos préselecionados no ressalto (asp) e na coroa (ac). tire, and a process for making a tire describes a belt structure (2) for a two-wheel vehicle made by means of strip-like segments or elements (15), each comprising parallel strands embedded in an elastomeric layer, sequentially arranged to the along the circumferential extension of a toroidal support (3), so as to form a reinforcement layer (2) with a continuous circumferential extension around a geometric axis of rotation (x-x ') of said toroidal support (3), where: each strip-like element (15) is arranged in a laying path (t) defining, at each point, a laying angle (a); at each point of the laying path (t) a laying gap (? g) is formed between adjacent strip-like elements (5); said seating path (t) is formed starting with the pre- ...

Method and apparatus for manufacturing pneumatic tyres

A green pneumatic tyre (2) is built on a rigid toroidal support (10) externally having a forming surface (10a) of a conformation corresponding to the inner shape of the tyre (2). The green tyre (2) engaged on the expandable toroidal support (10) is introduced into a vulcanisation mould (29) and submitted to a vulcanisation cycle. During vulcanisation, axial moving apart of side portions (19) of the toroidal support (10) is caused so as to press the beads (5) and sidewalls (8) of the tyre (2) against the vulcanisation mould (29).

Process and apparatus for building tyres

Motorcycle tire

SELF-WEARING VEHICLE AIR TIRE AND METHOD FOR THE PRODUCTION THEREOF

METHOD FOR PRODUCING AIR TIRES AND TORUM CORE FOR IMPLEMENTING THE PROCESS

Motorcycles tyre

MOTORCYCLE TIRE

pneu de motocicleta. é descrito um pneu, particularmente um pneu destinado a ser encaixado para o pneu frontal de uma motocicleta, tendo uma razão elevada de vácuo para borracha e compreendendo sulcos que são localizados assimetricamente através do plano equatorial e são arranjados substancialmente ortogonalmente ao plano equatorial do pneu no plano equatorial em si, e especialmente próximo um ao outro na direção circunferencial, de maneira tal a aumentar seu número na área de superfície de apoio das rodas. motorcycle tire. described is a tyre, particularly a tire intended to be fitted to the front tire of a motorcycle, having a high vacuum to rubber ratio and comprising grooves which are asymmetrically located across the equatorial plane and are arranged substantially orthogonally to the equatorial plane of the tire at the equatorial plane itself, and especially close to each other in the circumferential direction, in such a way as to increase their number in the support surface area of the wheels.

Method and apparatus for manufacturing pneumatic tyres

A green tyre (50) disposed on a toroidal support (10) is introduced into a vulcanisation mould (102). The mould (102) is closed through axial approaching of a pair of sidewall plates (130a, 130b) acting against the sidewalls (51) of the tyre (50). Circumferential sectors (140) set to operate against the tyre tread band (52) are maintained spaced apart from the tread band itself during admission of a working fluid designed to press the tyre (50) against the toroidal support (10). Subsequently, said sectors are centripetally approached for penetration into the tread band (52) concurrently with a step of full moulding and vulcanisation of the tyre (50) carried out through admission of steam under pressure into the tyre itself.

motor vehicle tire

PNEU PARA VEICULO A MOTOR. Pneu para veículo a motor adaptado para ser montado sobre as rodas traseiras de um veiculo a motor, compreendendo uma banda de rodagem que possui padrão de banda de rodagem, compreendendo um módulo que é repetido ao longo da extensão circunferencial do pneu. O módulo tem: pelo menos um primeiro par de primeiras ranhuras (12, 13) inclinadas em direções opostas com relação a um plano equatorial X-X do pneu e estendendo-se a partir do plano equatorial X-X em direção a um ressalto respectivo; pelo menos um segundo par de segundas ranhuras (15, 16) inclinadas em direções opostas com relação ao plano equatorial X-x estendendo-se a partir do plano equatorial X-X em direção a um respectivo ressalto; a primeira e a segunda (15, 16) ranhuras só escalonadas entre si na direção circunferencial de uma forma que mantenha uma distância substancialmente constante menor que metade do passo, no plano equatorial X-X entre a primeira (12, 13) ou segunda (15,16) ranhura e a adjacente na direção circunferencial. MOTOR VEHICLE TIRE. Motor vehicle tire adapted to be mounted on the rear wheels of a motor vehicle, comprising a tread that has a tread pattern, comprising a module that is repeated along the circumferential extension of the tire. The module has: at least a first pair of first grooves (12, 13) inclined in opposite directions with respect to an equatorial plane X-X of the tire and extending from the equatorial plane X-X towards a respective shoulder; at least a second pair of second grooves (15, 16) inclined in opposite directions with respect to the equatorial plane X-x extending from the equatorial plane X-X towards a respective shoulder; the first and the second (15, 16) grooves only staggered with each other in the circumferential direction in a way that maintains a substantially constant distance less than half the step, in the XX equatorial plane between the first (12, 13) or second (15, 16) groove and adjacent in the circumferential direction.

PROCESS FOR PRODUCING TIRE, ASSEMBLY TO ASSEMBLY AT LEAST A PORTION OF A HOUSING FRAME, AND TIRE CONSTRUCTION LINE

Tyre for two-wheeled vehicle and process for manufacturing the same

Within the tyre manufacture, a belt structure (2) is made by means of strip-like segments or elements (15) each comprising parallel cords embedded in an elastomeric layer, sequentially laid along the circumferential extension of a toroidal support (3), in such a manner that: -each strip-like element (15) is laid in a laying trajectory (T) defining, at each point, a laying angle (α); - at each point of the laying trajectory (T) a laying gap (Δg) is formed between adjacent strip-like elements (5); - said laying trajectory (T) is formed starting from preselected laying angles on the shoulder (αsp) and on the crown (αc) of the tyre; - the laying gap (Δg) between adjacent strip-like elements (5) varies along at least one section of said laying trajectory (T) between crown and shoulder so as to cause variation of said laying angle (α) and obtain said preselected angles on the shoulder (a,,,, ) and on the crown (αe).

Tyre for motorcycle wheels

Pneumatic tire

MOTORCYCLE TIRE.

pneu de motocicleta (100), compreendendo: - uma estrutura de carcaça compreendendo pelo menos duas lonas de carcaça radialmente sobrepostas, compreendendo uma pluralidade de elementos de reforço paralelos uns aos outros e sendo mutuamente cruzados; - uma banda de rodagem (8) radialmente sobreposta às lonas de carcaça, compreendendo uma pluralidade de sulcos (18,19,27) e apresentando uma razão vazio/sólido > 4%; - os primeiros e segundos sulcos de um primeiro e um segundo par sendo arranjados de modo a formar uma porção (porções) anular(es) central(is) através do plano equatorial apresentando uma razão vazio/sólido < 0,1%; - o primeiro par de primeiros sulcos (18) sendo arranjado circunferencialmente alternado ao segundo par de segundos sulcos (19); - o primeiro (18) e o segundo sulcos (19) se estendem axialmente na direção oposta ao plano equatorial por pelo menos 20% da largura l da banda de rodagem (8); - pelo menos um primeiro segmento (20,23) de cada primeiro (18) ou segundo (19) sulco sendo arranjado ao longo de uma direção que corresponde substancialmente à direção de um elemento de reforço de uma das primeira e segunda lonas de carcaça.

Method and apparatus for molding and curing a tyre for vehicle wheels

Motor vehicle tyre

A motor vehicle tyre (100), particularly for front wheels of motor vehicles, has a tread (8) extending around an axis of rotation (Z) and comprising a central annular portion (A) which straddles an equatorial plane (X-X) and two annular shoulder portions (B) arranged on axially opposite sides of the central annular portion (A). The tread band (8) has a void-to-rubber ratio of less than 10% and the central annular portion (A) has an axial extension less than 40% of the axial development of the tread band (8) and comprises at least a pair of first grooves (20) extending substantially longitudinally on opposite sides of the equatorial plane (X-X). Each shoulder portion (B) has an axial extension less than 35% of the axial development of the tread band and comprises a plurality of second grooves extending substantially transversally forming an average angle with the equatorial plane (X-X) of more than 90°. The central annular portion (A) has a void-to-rubber ratio more than 0.15 and the first grooves (20) comprise at least one first segment (22) and at least one second segment (23) which is inclined with respect to said first segment (22) so as to form a concavity directed towards the equatorial plane X-X. The first segment (22) of each first groove (20) is shorter than the second segment (23) and precedes the second segment (23) in the tyre rolling direction.

Tyre for bicycle wheels

A tyre for bicycle wheels, having a carcass structure, a belt layer arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt layer. The carcass structure has a carcass ply engaged with a pair of annular anchoring structures and including a plurality of reinforcing cords. The cords are inclined, with respect to an equatorial plane of the tyre, at a first angle between about 65° and about 90°. The belt layer has a reinforcing cord wound onto the carcass structure according to a winding direction oriented, with respect to the equatorial plane, at a second angle between about 0° and about 30°.

Motorcycle tyre and pair of motorcycle tyres

A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre.

Process for manufacturing a tyre and toroidal support for carrying out said process

A process for manufacturing a tire by the steps of producing and assembling the tire structural elements on a toroidal support to form a green tire, and the step of precuring at least an inner surface of the green tire by heating the toroidal support. The radially inner surface of the toroidal support is provided with a plurality of protruding elements to reduce the time required for the outer surface of the toroidal support to reach a temperature which is suitable for ensuring a uniform and homogeneous precuring of the inner surface of the green tire, preferably of the inner surface and the bead regions of the green tire.

Self-supporting tyre for vehicle wheels, and method for manufacturing the same

In a self-supporting tyre, the carcass plies (3a, 3b) are each made through sequential deposition of strip-like lengths circumferentially distributed on a toroidal support (11). Resilient stiffening inserts (16, 20) are interposed between the side portions (13a, 14a) of axially inner lengths (13), axially outer lengths (14) and possible axially intermediate lengths (15). In this way a sort of partly open container is created around at least one of the stiffening inserts (16, 20), the opening degree of which can be regulated depending on requirements, by modifying the solid space/void space ratio determined by the distance existing between the side portions (13a, 14a, 15a) of the strip-like lengths (13, 14, 15) coating each of the axially opposite sides of the stiffening insert itself.

motorcycle tire

PNEU PARA VEÍCULOS A MOTOR Um pneu (1) para motocicletas tem uma banda de rodagem (8) e compreende uma porção anular central (A) e duas porções de ombro anulares (B). A banda de rodagem (8) compreende pelo menos uma primeira ranhura (20) se estendendo de uma porção de ombro anular (B) para a outra porção de ombro anula (B) e tendo um primeiro vértice (V1) na porção anular central (A), e pelo menos um par de segundas ranhuras (22) arranjadas sobre lados opostos em relação ao plano equatorial (X-X), cada ranhura do mencionado pelo menos um par de segundas ranhuras (22) sendo inclinada em relação ao plano equatorial e se estendendo de uma respectiva porção de ombro anular (B) até a porção anular central (A) sem intersectar o plano equatorial (X-X). A distância na direção circunferencial entre uma extremidade axialmente interna (E) de cada ranhura do mencionado pelo menos um par de segundas ranhuras (22) e o primeiro vértice (V1) não é maior do que 3,5% da extensão circunferencial da banda de rodagem (8). TIRE FOR MOTOR VEHICLES A tire (1) for motorcycles has a tread (8) and comprises a central annular portion (A) and two annular shoulder portions (B). The tread band (8) comprises at least a first groove (20) extending from one annular shoulder portion (B) to the other annular shoulder portion (B) and having a first apex (V1) in the central annular portion ( A), and at least one pair of second grooves (22) arranged on opposite sides with respect to the equatorial plane (XX), each groove of said at least one pair of second grooves (22) being inclined with respect to the equatorial plane and if extending from a respective annular shoulder portion (B) to the central annular portion (A) without intersecting the equatorial plane (XX). The distance in the circumferential direction between an axially inner end (E) of each groove of said at least one pair of second grooves (22) and the first vertex (V1) is not greater than 3.5% of the circumferential extension of the band of ...

tire for bicycle wheels, and racing and off-road bicycle wheels.

um pneu (100) para rodas de bicicleta, compreendendo uma estrutura de carcaça (2), pelo menos uma camada de correia (6) arranjada em uma posição radialmente externa em relação à estrutura de carcaça (2) e uma banda de rodagem (7) arranjada em uma posição radialmente externa em relação à camada de correia (6). a estrutura de carcaça (2) compreende pelo menos uma lona de carcaça (3) engatada, nas bordas de extremidades axialmente opostas (3a) da mesma, com um par de estruturas de ancoragem anular (4) e incluindo uma pluralidade de cordoneis de reforço (30) inclinados, com relação a um plano equatorial (x-x) do pneu (100), por um primeiro ângulo compreendido entre cerca de 65° e cerca de 90°, os valores extremos sendo incluídos. dita pelo menos uma camada de correia (6) compreende pelo menos um cordonel de reforço (60) enrolado na estrutura de carcaça (2) de acordo com uma direção de enrolamento orientada, em relação a dito plano equatorial (x-x), em um segundo ângulo compreendido entre cerca de 0° e cerca de 30°, os valores extremos sendo incluídos.

Tyre for bicycle wheels

The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre ( 100 ) for bicycle wheels comprising: —a carcass structure ( 2 ); and —a tread band ( 7 ) arranged in a radially outer position with respect to said carcass structure ( 2 ); characterised in that said tread band ( 7 ) is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer ( 6, 11 ) is interposed between said carcass structure ( 2 ) and said tread band ( 7 ), said protective layer ( 6, 11 ) comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres.

Tyre with improved bead core comprising preformed wires

The present invention relates to a tyre (10) for vehicle wheels, comprising : a carcass comprising at least one carcass ply (11) the ends of which are fastened to a pair of annular reinforcing elements (12), each of said annular reinforcing elements being incorporated in a respestive bead (13) of said tyre and comprising at least one metallic threadlike element (22), a tread band (15) extending circumferentially around said carcass structure, and a belt structure (17) circumferentially located between said carcass structure and said tread band. In accordance with the present invention, said at least one threadlike element (22) is performed. The present invention also concerns an annular reinforcing element (12) comprising at least one preformed threadlike element (22) as well as a method for controlling the behaviour, during use, of a tyre for vehicle wheels in an at least partially deflated condition.

Method and apparatus for manufacturing pneumatic tyres

A green pneumatic tyre is built on a rigid toroidal support externally having a forming surface of a conformation corresponding to the inner shape of a tyre. The green tyre engaged on the expandable toroidal support is introduced into a vulcanisation mould and submitted to a vulcanisation cycle. During vulcanisation, axial moving apart of side portions of the toroidal support is caused so as to press the beads and sidewalls of the tyre against the vulcanisation mould.

Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens

Selbsttragender fahrzeugluftreifen und verfahren zur dessen herstellung

Verfahren und vorrichtung zum formen und härten eines reifens für fahrzeugräder

Verfahren und vorrichtung zur herstellung von reifen

Verfahren zur herstellung eines luftreifens und entsprechende aufbaulinie und montagevorrichtung

Tyre for motorcycle wheels

It is described a motorcycle tyre intended to be fitted to the rear wheel of a motorcycle, having a high void-to-rubber ratio which provides a suitable draining. The tread pattern is provided with pairs of primary grooves having a considerable dimension, which mainly carry out the draining function of the tyre and whose arrangement, substantially according to the stress lines of the tyres, noticeably reduces the probability of triggering uneven wear, to the advantage of the tyre mileage. Moreover, the presence of secondary grooves having a reduced dimension, in terms of both extension and width, suitably arranged, between the primary grooves, increases the grip of the tyre to the ground, whereas their orientation increases its stabilizing features against the drift forces acting on the tyre, particularly in low or very low friction conditions.

?pneu de motocicleta?

é descrito um pneu de motocicleta destinado a ser encaixado na roda traseira de uma motocicleta, com uma alta razão de vácuo para borracha que provê uma drenagem adequada. o padrão da banda de rodagem é provido com pares de ranhuras primárias com uma dimensão considerável, que desempenham principalmente a função de drenagem do pneu e cujo arranjo, substancialmente de acordo com as linhas de tensão dos pneus, reduz visivelmente a probabilidade de provocar desgaste irregular, em benefício da quilometragem do pneu. além disso, a presença de ranhuras secundárias com uma dimensão reduzida, em termos de extensão e largura, arranjados apropriadamente, entre as ranhuras primárias, aumenta a aderência do pneu ao solo, enquanto a sua orientação aumenta as suas características estabilizadoras contra as forças de derrapagem agindo no pneu, particularmente em condições de fricção baixa ou muito baixa.

Verfahren zum bau eines reifenrohlings für fahrzeugräder und durch das verfahren gebauter reifen

Verfahren zur herstellung von luftreifen und torusförmiger kern zur durchführung des verfahrens

Motorradreifen

Reifen für hochleistungs-autos

Motorcycle tyre

Motorcycle tyre (100) comprising a tread band (8) divided into a central zone (L) and two shoulder zones. The central zone (L) extends symmetrically on either side of the equatorial plane (X-X) of the tyre over a width less than or equal to 60% of the lateral extension of the tread band (8) and has in the central zone (L) at least one first module (14) repeatedly duplicated in a direction of circumferential extension of the tyre comprising: at least two longitudinal grooves (18, 19) inclined relative to the equatorial plane (X-X); at least two substantially transverse grooves (15, 16) intersecting the said two longitudinal grooves (18, 19) so as to define at least one block (20). The central zone (L) further has a solids/voids ratio greater than the solids/voids ratio of the shoulder portions. The tread pattern has at least one circumferentially continuous rib (52) situated in an axially outer portion of said shoulder portions.

Reifen mit einem wulstkern mit vorgeformten drähten

Verfahren und vorrichtung zur herstellung von luftreifen

Tyre for motorcycles

Tyre (100) for motorcycles, having a tread band (8) comprising a central annular portion (A) symmetrically located astride an equatorial plane (X-X); and two shoulder annular portions (B) located on axially opposite sides relative to the central annular portion (A). The central annular portion (A) has an axial extension (M) not greater than 65% of the axial development of the tread band (8). Each shoulder annular portion (B) has axial extension (N) not greater than 45% of the axial development of the tread band (8). The tread band (8) comprises a plurality of grooves and sipes adapted to define a tread pattern. The central annular portion (A) comprises at least two first substantially longitudinal grooves (18, 19), opposed to each other relative to the equatorial plane X-X of the tyre. The tread band (8) comprises a plurality of grooves and sipes adapted to define a tread pattern. The central annular portion (A) comprises at least one first sipe (20) and a second sipe (22), circumferentially consecutive, at least one of which is inclined relative to the equatorial plane X-X of the tyre so as to form an angle a < 60° in absolute value.

Tyre for bicycle wheels

The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre (100) for bicycle wheels comprising: - a carcass structure (2); and - a tread band (7) arranged in a radially outer position with respect to said carcass structure (2);characterised in that said tread band (7) is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer (6, 11) is interposed between said carcass structure (2) and said tread band (7), said protective layer (6, 11) comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres.

Tyre for bicycle wheels

Tyre for scooter and/or maxiscooter

Tyre for motorcycles comprising a tread band on which a tread pattern (10) is formed, the tread pattern (10) comprising a plurality of grooves arranged so as to define on said tread band a void to rubber ratio lower than or equal to about 12%, wherein said tread pattern (10) comprises a pair of first longitudinal grooves (11, 12) arranged on opposite sides of the equatorial plane (X-X), one pair of second substantially longitudinal grooves (13, 14) arranged in an axially outer position with respect to said pair of first substantially longitudinal grooves (11, 12);, and a plurality of first transversal grooves (20, 21) arranged on at least 50% of the lateral extension of portions (15, 16) comprised between said the first and the second substantially longitudinal grooves (11, 12, 13, 14).

Verfahren zur herstellung von luftreifen und torusförmiger kern zur durchführung des verfahrens.

Tyre for bicycle wheels

The present invention relates to a tyre for bicycle wheels comprising a tread band containing an anti-puncture system capable of offering high resistance to the penetration of foreign bodies. In particular, the present invention relates to a tyre (100) for bicycle wheels comprising: - a carcass structure (2); and - a tread band (7) arranged in a radially outer position with respect to said carcass structure (2);characterised in that said tread band (7) is made by vulcanisation of a vulcanisable elastomeric compound comprising fibrillated polymeric fibres of micrometric dimensions, wherein at least one protective layer (6, 11) is interposed between said carcass structure (2) and said tread band (7), said protective layer (6, 11) comprising (i) a plurality of reinforcing cords of textile material oriented with respect to the equatorial plane of the tyre with an angle greater than 30°, (ii) a square fabric with textile fibres of the weft or warp oriented with respect to the equatorial plane of the tyre with an angle greater than 20°, or (iii) a non-woven fabric with randomly oriented textile fibres.

pneu para motocicletas

1 / 1 resumo “pneu para motocicletasâ€� pneu para motocicletas compreendendo uma banda de rodagem em que um padrã£o de banda de rodagem (10) ã© formado, o padrã£o de banda de rodagem (10) compreendendo uma pluralidade de ranhuras arranjadas de forma a definir na dita banda de rodagem uma vazio para razã£o de borracha menor do que ou igual a cerca de 12%, em que o dito padrã£o de banda de rodagem (10) compreende um par de primeiras ranhuras longitudinais (11, 12) arranjadas em lados opostos do plano equatorial (x-x), um par de segundas ranhuras substancialmente longitudinais (13, 14) arranjadas em uma posiã§ã£o externa de maneira axial com relaã§ã£o ao dito par de primeiras ranhuras substancialmente longitudinais (11, 12);, e uma pluralidade de primeiras ranhuras transversais (20, 21) arranjadas em pelo menos 50% da extensã£o lateral das porã§ãµes (15, 16) compreendidas entre as ditas primeiras e as ditas segundas ranhuras substancialmente longitudinais (11, 12, 13, 14).

Verfahren zur herstellung einer gürtelstruktur in einem reifen, insbesondere für motorrad-räder

Motorcycle tyre

It is described a motorcycle tyre (100) intended to be fitted to a wheel of a motorcycle of the “supersport” segment, comprising an equatorial plane and a tread band extending in axial direction with a given axial development, wherein the tread band comprises a first annular portion made of a first elastomeric material, having a first dynamic shear storage modulus measured at 70° C., and at least one second annular portion made of a second elastomeric material, having a second dynamic shear storage modulus measured at 70° C., different form said first dynamic shear storage modulus measured at 70° C.

Tyre for scooter and/or maxiscooter

Tyre for motorcycles comprising a tread band on which a tread pattern (10) is formed, the tread pattern (10) comprising a plurality of grooves arranged so as to define on said tread band a void to rubber ratio lower than or equal to about 12%, wherein said tread pattern (10) comprises a pair of first longitudinal grooves (11, 12) arranged on opposite sides of the equatorial plane (X-X), one pair of second substantially longitudinal grooves (13, 14) arranged in an axially outer position with respect to said pair of first substantially longitudinal grooves (11, 12);, and a plurality of first transversal grooves (20, 21) arranged on at least 50% of the lateral extension of portions (15, 16) comprised between said the first and the second substantially longitudinal grooves (11, 12, 13, 14).

自転車用車輪用のタイヤ

【課題】異物の侵入に対して高い抵抗を提供できる耐パンクシステムを含むトレッドバンドを含む自転車車輪用のタイヤを提供する。【解決手段】カーカス構造体（２）及びカーカス構造体（２）に対して半径方向外側の位置に配置されたトレッドバンド（７）を含み、トレッドバンド（７）はマイクロメートル寸法のフィブリル化ポリマー繊維を含む加硫性エラストマー化合物を加硫することによって作製され、少なくとも１つの保護層（６、１１）はカーカス構造体（２）とトレッドバンド（７）との間に挿入され、保護層（６、１１）は（ｉ）タイヤの赤道面に対して３０°を上回る角度に向けられたテキスタイル材料の複数の補強コード、（ｉｉ）タイヤの赤道面に対して２０°を上回る角度に向けられた、横糸若しくは縦糸のテキスタイル繊維を備える方形織柄ファブリック、又は（ｉｉｉ）ランダムな向きのテキスタイル繊維を備える不織ファブリックを含む。【選択図】図１

processo e aparelho para confeccionar pneus para rodas de veículos

1 / 1 resumo “processo e aparelho para confeccionar pneus para rodas de veãculos” a invenã§ã£o se refere a um processo para confeccionar pneus para rodas de veã­culos, que compreende: enrolar pelo menos um produto semiacabado (19), na forma de uma tira contã­nua cortada no tamanho, circunferencialmente em torno de um tambor de confecã§ã£o (10) para formar uma luva de carcaã§a; conformar a luva de carcaã§a de acordo com uma configuraã§ã£o substancialmente toroidal; encaixar, em torno de cada um de duas zonas terminais axialmente opostas (21) da luva de carcaã§a, uma estrutura de ancoragem anular (4); revirar para cima cada uma das zonas terminais axialmente opostas (21) em torno da respectiva estrutura de ancoragem anular (4). a configuraã§ã£o toroidal da luva de carcaã§a ã© pelo menos parcialmente realizada antes de encaixar as estruturas de ancoragem anulares (4) e ela compreende: dilatar radialmente uma porã§ã£o axialmente central (20) da luva de carcaã§a enquanto as duas zonas terminais axialmente opostas (21) sã£o livres. a invenã§ã£o tambã©m se refere a um aparelho para confeccionar pneus.

Method of forming a belt structure in a tyre, in particular for motorcycle wheels

Formation of a belt structure (2) takes place by laying down, directly on the carcass structure (3) of a tyre being processed (1), a laying layer (16) formed of a continuous strip-like element (16) of elastomer material directly coming from an extrusion die. The strip-like element (16a) has a differentiated thickness at its opposite edges to give rise to circumferential grip recesses (18) on the laying layer (16). Then, on the laying layer (16) a primary belt strip (6) is formed which is obtained by winding up of a continuous bare cord into coils (6a) disposed in axial side by side relationship. A cord of the high starting elongation type is preferably employed and it is wound up substantially in the absence of tensioning. A covering layer (19) made in the same manner as the laying layer (16) can be subsequently laid down on the primary belt strip (6).

Verfahren zur herstellung einer gürtelstruktur in einem reifen, insbesondere für motorrad-räder

輪胎之部分(一)

【物品用途】;本設計係關於一輪胎。;【設計說明】;圖式所揭露之虛線部分，為本案不主張設計之部分。

Motorcycles tyre

Motorcycles tyre, comprising: a radial carcass structure (2); a belt structure (6) applied in radially outer position with respect to the radial carcass structure (2); a tread band (8) applied in radially outer position with respect to the belt structure (6). The tyre (1) has a curvature ratio (f/C) greater than or equal to about 0.25. The tread band (8) comprises: a plurality of blocks (14) mutually spaced so as to define a tread pattern with a void/solid ratio (1 - Sb/St) comprised between about 25% and about 50%; transverse grooves (11) placed in succession along the circumferential extension of the tyre (1) and each substantially extending over the entire axial width of the tread band (8). Each transverse groove (11) substantially extends along an axial direction. Two successive transverse grooves (11) circumferentially delimit an assembly (12) of blocks (14) placed in succession over the entire axial width of the tread band (8). Circumferential grooves (13) delimit the blocks (14) of an assembly (12). A ratio between a circumferential length (LI) of the blocks (14) and a width (L2) of the transverse grooves (11) is equal to or greater than about 2.

Motorcycle tyre

It is described a motorcycle tyre (100) intended to be fitted to a wheel of a motorcycle of the "supersport" segment, comprising an equatorial plane and a tread band extending in axial direction with a given axial development, wherein the tread band comprises a first annular portion made of a first elastomeric material, having a first dynamic shear storage modulus measured at 70°C, and at least one second annular portion made of a second elastomeric material, having a second dynamic shear storage modulus measured at 70°C, different form said first dynamic shear storage modulus measured at 70°C.

pneu para motocicleta.

É descrito um pneu para motocicleta (100) destinado a ser encaixado em uma roda de uma motocicleta do segmento super esporte, compreendendo um plano equatorial e uma banda de rodagem estendendo-se na direção axial com um dado desenvolvimento axial, em que a banda de rodagem compreende uma primeira porção anular feita a partir de um primeiro material elastomérico, tendo um primeiro módulo de armazenamento de cisalhamento dinâmico medido a 70°C, e pelo menos uma segunda porção anular feita a partir de um segundo material elastomérico, tendo um segundo módulo de armazenamento de cisalhamento dinâmico medido a 70°C, diferente do primeiro módulo de armazenamento de cisalhamento dinâmico medido a 70°C.

Tyre for bicycle wheels

The present invention relates to a tyre (100) for bicycle wheels comprising: - a carcass structure (2) comprising at least one carcass ply (3) having ends (3a) turned up around respective bead cores (4a, 4b) to form respective opposite beads (5a, 5b), - a tread band (7) arranged in a radially outside position with respect to said carcass structure (2), and - a layer of vulcanised elastomeric material (8) superimposed, in a radially inside or outside position, to the carcass structure (2), or interposed in the carcass structure (2), said layer of vulcanised elastomeric material (8) axially extending from at least one bead (5a) to the opposite bead (5b), characterised in that said layer of vulcanised elastomeric material (8) is made by vulcanisation of a vulcanisable elastomeric compound comprising micrometre-sized fibrillated polymer fibres.

Motorradreifen

Pneumatico per vetture ad alte prestazioni

Tyres for motor vehicles

A tyre (1) for motor vehicles, having a tread band (8) extending around a rotation axis (Z) and comprising an annular central portion (A) astride of an equatorial plane (X-X) of the tyre, two annular shoulder portions (B) arranged on axially opposite sides with respect to the annular central portion (A) and two annular side portions (C) each arranged between the annular central portion (A) and a respective annular shoulder portion (B), the tread band (8) having at least one module (Ti; T2) replicated along a circumferential direction of the tyre and comprising: at least one plurality of primary grooves inclined with respect to the equatorial plane (X-X) and arranged at least on the annular portions (B), (C); at least one plurality of secondary recesses arranged mainly on the annular central portion (A) and on at least one annular side portion (C); wherein a substantial disappearance of the secondary recesses determines a difference in the empty/solid ratio on the annular central (A) and side (C) portions between a new tyre and a tyre that has travelled at least 2000 km greater than 1.7%.

Tread for a motorcycle tire

Tyre for motorcycles

A tyre for motorcycles, has a tread band and includes an annular central portion and two annular shoulder portions. The tread band includes at least one first groove extending from one annular shoulder portion to the other annular shoulder portion and having a first vertex at the annular central portion, and at least one pair of second grooves arranged on opposite sides with respect to the equatorial plane, each groove of said at least one pair of second grooves being inclined with respect to the equatorial plane and extending from a respective annular shoulder portion up the annular central portion without intersecting the equatorial plane. The distance in the circumferential direction between an axially inner end of each groove of said at least one pair of second grooves and the first vertex is no greater than 3.5% of the circumferential extension of the tread band.

Tyre for motorcycles

A tyre (1) for motor cycles, has a tread band (8) and comprising an annular central portion (A) and two annular shoulder portions (B). The tread band (8) comprises at least one first groove (20) extending from one annular shoulder portion (B) to the other annular shoulder portion (B) and having a first vertex (Vl) at the annular central portion (A), and at least one pair of second grooves (22) arranged on opposite sides with respect to the equatorial plane (X- X), each groove of said at least one pair of second grooves (22) being inclined with respect to the equatorial plane and extending from a respective annular shoulder portion (B) up to the annular central portion (A) without intersecting the equatorial plane (X-X). The distance in the circumferential direction between an axially inner end (E) of each groove of said at least one pair of second grooves (22) and the first vertex (Vl) is no greater than 3.5% of the circumferential extension of the tread band (8).

Pneumatico per vetture ad alte prestazioni

Tread for a motorcycle tire

pneu para rodas de bicicleta

a presente invenção se refere a um pneu para rodas de bicicleta que compreende uma banda de rodagem que contém um sistema antiperfuração capaz de ter alta resistência à penetração de corpos estranhos, assegurando simultaneamente desempenhos ideais de manuseio. em particular, a presente invenção considera um pneu para rodas de bicicleta que compreende: uma estrutura de carcaça; e - uma banda de rodagem arranjada em posição radialmente externa em relação à estrutura de carcaça; em que a dita banda de rodagem é feita por meio da vulcanização de uma composição elastomérica reticulável que compreende um sistema de reforço constituído por fibras de silicato modificadas de tamanho nanométrico e fibras de polímero fibriladas do tamanho micrométrico.

Controlled volume device and method for moulding and vulcanizing a tyre

A device for the moulding and vulcanization, in predetermined conditions of temperature and pressure, of an at least partially green tyre (5) having a defined volume, said device comprising an outer shell and a collapsible inner support (4, 7), in which said device also comprises a movable crown (2) interposed between said inner support and said outer shell, said movable crown forming, with said outer shell, a cavity of controlled volume for the moulding and vulcanization of said tyre, the volume of said cavity adapting to the volume of the tyre it contains, so that said moulding pressure is maintained within a predetermined range of values. The invention also relates to a method of moulding and vulcanization at controlled volume.

Vorrichtung mit gesteuertem volumen und verfahren zum formen und vulkanisieren eines reifens

Apparatus and method for moulding and vulcanizing a tyre in controlled volume conditions

A device for the moulding and vulcanization, in predetermined conditions of temperature and pressure, of an at least partially green tyre (5) having a defined volume, said device comprising an outer shell and a collapsible inner support (4, 7), in which said device also comprises a movable crown (2) interposed between said inner support and said outer shell, said movable crown forming, with said outer shell, a cavity of controlled volume for the moulding and vulcanization of said tyre, the volume of said cavity adapting to the volume of the tyre it contains, so that said moulding pressure is maintained within a predetermined range of values. The invention also relates to a method of moulding and vulcanization at controlled volume.