Improvements in Printing Machines for Printing on One Side only of Continuous Paper or Tissue.
Реферат: 13,250. Prebay, E. June 26. Cylinder machines with plane printing-surfaces; feeding-apparatus for webs delivery apparatus; set-off, preventing.-Relates to cylinder machines for printing continuous webs of paper or tissue, the cylinder having pneumatic gripping-devices. Fig. 1 shows a machine in side elevation, in which c is the impression cylinder to which the web f is fed from a roll a over guides 16, 17, 18, 19, 20, 21, and after printing the web passes from the cylinder over guides e, 22, 23, 24, 25, 26, 27 to a winding-up roller d. A loop of the paper f contains a tension bar or roller b. The cylinder is provided with two pneumatic grippers g and 28, Fig. 3, one or the other of which is always gripping or holding the paper. The grippers are connected through pipes k, 30 and the hollow ends j of the shaft i by pipes l, 31 with an air-exhausting arrangement. Valves m, 32 in the pipes are operated by cams n, 33 so that the grippers are put in action to secure the paper at the point 1 and to release it at the point 2, where it leaves the cylinder. A bar h presses the paper on to the suction gripper-bar g. The winding-roller d is driven by a band o passing round a pulley p, geared to the cylinder c, and over suitable guides to and around a friction pulley on the shaft of the roller d. The roll a is driven at variable speed, by a band s and grooved cone pulleys, from the roller d. A blotting or set-off web may be wound up with the printed web, from a roller. The web roll a is mounted in an arm x pivoted at y so that it may be moved down, as shown in dotted lines, by gearing 3, 4, z, for removing and replacing the roll. The framing is so lengthened and arranged that the operator may have access to the roll a &c. in the space between it and the inking-apparatus 10. The machine may be used for printing two or more colours on the web of paper or tissue, and the web is provided with marginal perforations for engaging with registering-pins on the cylinder c to obtain correct register. When thin tissue is being printed the register perforations are in a stronger web which supports the tissue in its passage through the machine. The register pins are adjustable by screws &c.
Improvements in or relating to a machine for cutting toothed wheels
Номер патента: GB1126472A. Автор: . Владелец: Centre Electronique Horloger SA. Дата публикации: 1968-09-05.