Patent GB-290784-A (GB)
Title: Improvements in rotary printing machines
IPC: B41F33/08
Filed: 1927-03-23
Abstract: 290,784. Timson, A. R. March 23, 1927. Rotary machines; stopping, starting, and tripping arrangements; inking-apparatus.-In a rotary printing -machine, wherein one or more type-cylinders are arranged to be moved into or out of printing-position when the machine is started or stopped, manually-operable mechanism is provided for operating the type cylinder or cylinders and the driving-clutch. Preferably, the inking-rollers are also arranged to be automatically thrown into and out of operative position as the type-cylinder is moved. The machine is provided with two or more complete printing-units adapted to be relatively adjusted round the impression cylinder to vary the position of printing. The machine, which is provided with an impression cylinder 8, and, preferably, a fixed printing-unit A and two adjustable units B, C, is set into motion by a clutch actuated through a link 83, Fig. 1. from a handle 71. The handle 71 is connected to a pivoted arm 68 having a roller 73 engaging in a notch in a disc 30 or in a plate 74 secured thereto so that the disc can be oscillated by movement of the handle. The handle carries a cam arranged to act on pins 82 on spring-pressed bolts 76, 77, the bolts being adapted to enter corresponding notches in the edge of the disc to hold The disc in either extreme position. Movement of the handle 71 first causes the withdrawal of the operative bolt, then swings the disc 30, and finally allows the other bolt to lock the disc in its new position. The disc 30 carries adjustable brackets 3, 5 Figs. 1 and 2, corresponding in number to the printing-units, and each of these brackets has a projection 33 engaging in a slot 32 in an arm 29. The arm carries a bearing for a worm 44 engaging a worm-wheel 43 secured to a shaft 28. Movement of the arm 29 results in the rotation of the shaft 28, but the shaft can be adjusted independently of the arm by actuation of the worm 44. The shaft 28 carries the type-cylinder 1 on an eccentric portion, so that on oscillation of the arm 29 the cylinder is moved into or out of engagement with the impression cylinder 8. A quadrant 64, loosely mounted on the hub of a worm-wheel 65 keyed) to a sleeve 48 on the shaft of the duct roller 3 in the ink trough 2. is adapted to be oscillated from the arm 29 through gear-wheels 62, 60, 61. The hub of the. quadrant carries the bearing of a worm 66 in engagement with the wheel 65 so that oscillation of the quadrant rotates the sleeve 48. A bracket 56, carrying the support 55 of the ink roller 4, is secured to the sleeve 48 and moves the roller 4 out of contact with the typecylinder when the cylinder is oscillated away from the impression cylinder. The position of the roller 4 is independently adjustable relatively to the type-cylinder by operation of the worm 66, and relatively to the duct roller 3 by a screw 58 acting on a spring-pressed block carrying the support 55 and adjustable in the bracket 56. The trough 2, which is provided with a scraper blade 46 contacting with the roller 3, is, in the movable units B, C, rotatable about the shaft of the roller 3 in order that, after the adjustment of the units round the impression cylinder, the trough can be brought to horizontal position. This is effected by attaching the trough at each end to a carriage 49 adapted to turn on a bearing on the sleeve 48, one of the carriages being provided with a wheel in engagement with a worm 52. In the case of the fixed unit A, the parts are mounted in the frame 7 of the machine, but in the movable units, the parts are carried by side members 5 having a dovetail groove engaged by an annular part of a disc 6 and by a locking-strip to enable the units to be adjusted round the disc and to be locked in position. The disc 6 is carried by the frame 7, and its hub forms the support for the shaft of the impression cylinder 8, for a fixed toothed wheel 20, and for the disc 30. A wheel 20 is mounted at each end of the impression cylinder and is engaged by gear wheels 18 on each printing-unit, the gear wheels on each unit being on a common shaft 19 and actuated by worm gearing 22, 23 from a handoperated shaft 24 for the purpose of adjusting the unit relatively to the impression cylinder.