Patent GB-411110-A (GB)
Title: Device for disengaging the inking rollers of printing machines of the platen type
IPC: B41F1/40
Filed: 1932-10-25
Abstract: 411,110. Printing machines. FONDERIES DEBERNY ET PEIGNOT, 18, Rue Ferrus, Paris. Oct. 25, 1932, No. 29871. Convention date, May 3. [Class 100 (ii).] Inking-apparatus.-Relates to disengaging- devices for the inking-rollers of printing- machines having a platen and the inking- rollers actuated by the same mechanism, the roller-carriers being actuated through a connection comprising relatively movable parts which are locked together in the operative position, and when disengaged the connection actuates the carriers until they have moved into the position of rest and leaves them in this position. In the construction shown in Fig. 1, the carriers 11 of the inking-rollers 13 are actuated through a disc 16 which oscillates the platen. A crank 9 secured to the disc 16 oscillates, through a lever 9<1>, a crank 8 and an attached steel disc 3 about a shaft 8<a> supported in the frame of the machine and an arm 10. Loosely pivoted on the shaft 8<a> is a doublearmed lever 7 rigid with a crank 12a which is connected to the roller carriers 11 through a rod 12. The lever 7 carries a pin 7<a> on which is mounted a lever 1 having a finger 1<a> adapted to engage a notch in the disc 3 under the action of a spring 2 attached to the lever 7 and the lever 1. The lever 1 carries a roller 5 adapted to roll over a rigid cam 5<a> concentric with the disc 3, and to co-operate with a plate provided on the lower arm of a lever 4 pivoted to the frame of the machine, the upper arm of this lever being pivoted to a control lever 6. When the inking-rollers are engaged, the plate on the lever 4 is lowered as shown, and the disc 3 carries along in its oscillating movement the levers 1, 7, 12<a>, 12 and the carriers 11. To disengage the inking-rollers the plate on the lever 4 is raised by moving the control lever 6, so that when the roller 5 reaches its lower position it abuts the plate, and swings the lever 1 against the action of the spring 2 to liberate the finger 1<a> from the notch in the disc 3 ; when this occurs the disc 3 no longer actuates the carriers 11. The disengagement takes place when the inking - rollers have reached the position of rest as shown. When the control lever 6 is replaced, the spring 2 forces the finger 1<a> to enter the notch in the disc 3 when the notch comes directly opposite the finger. In the construction shown in Fig. 4, the roller carriers 22 are actuated from the swinging platen by means of a rod 21 and oscillate about the shaft of the crank discs. The platen can be adjusted by means comprising two eccentrics 17 journalled on a shaft 18 rigid with the platen and inside the heads of rods 19 connected to the crank discs. The eccentrics are connected to a lever 20 provided with a hand-lever 30 which can be displaced and set in various positions by a finger and notch arrangement. The rod 21 comprises a bar 23 adapted to slide in a guide 25, but normally retained therein by means of a spring-pin 26 which engages a notch in the bar 23. The rod 21 is mounted on an eccentric on the shaft 18 of the platen. When the carriers 22 are in the position of rest, as shown, they bear upon two stops 28 provided on the frame of the machine, and in this position the platen may be adjusted for pressure by the lever 30 without moving the carriers, since the eccentric of the rod 21 can be adjusted in known manner to compensate for any adjustment of the platen. In order to disengage the inking-rollers the pin 26 is withdrawn from its notch in the bar 23 by means of a hand-lever 27 during the operation of the machine ; if this disengagement occurs during the closing of the platen, then the guide 25 is pushed back and the carriers 22 rise to the position of rest, and when the platen opens the bar 23 will slide within the guide 25, leaving the carriers behind. Re-engagement of the carriers with the platen is effected by raising the lever 27 so that the spring-pin 26 will engage its notch again when it is directly opposite thereto.