Patent GB-190311109-A (GB)
Title: Improvements in Printing Machines.
Inventor: LOCK WILLIAM HENRY
Filed: 1903-05-15
Granted: 1904-02-18
Abstract: 11,109. Lock, W. H., and North, T. M. May 15. Rotary machines ; inking - apparatus ; l i t h o - graphic and like printing. -Relates to the inking, tripping, and damping mechanism of lithographic or letterpress rotary machines. Fig. 1 s h o w s a machine having a printing-cylinder 2 and d a n impression cylinder 4. The inking-rollers 9 when in operative position engage the reciprocating distributing-rollers 8 and also the forme 10 and inking-surface 10<a> on the cylinder 2. The rollers 8 are driven by gearing from a wheel on one end of the cylinder 2, and are reciprocated by arms rocked by a cam on the cylinder shaft 3. The rollers 9 are in pairs, each pair being journalled on crutch pins 26 clamped in sockets in pairs of plates 31 pivoted to the framing at 32. The two plates of each pair are geared to each other, so as to move on their pivots in unison, by gear teeth 33. The plates are rocked on their pivots to move the rollers 9 to or from the cylinder 2, by means of sliding cam-bars 37 running on rollers 44, and connected to the frame by studs and slots 38, 39. On each bar 37 are three cam surfaces, each engaging a roller 43 on one plate 31 of each pair. The cam-bars may be operated independently of the cylinder-tripping devices, and are also operated to trip the rollers 9 when the impression cylinder 4 is tripped. The bars may be operated independently by a hand lever 45 on a shaft 46 having arms 50 ergaging the bars. The machine is tripped by a cam 51 on the shaft 3 operating a lever 66 provided with a segmental rack 65 engaging a toothed segment 64 loose on a shaft 57. The shaft 57 is coupled to the segment 64, so as to turn with it, when the trip lever 73 is operated. On the lever 73 is a cam groove 76 engaging a pin on a double pawl 71 pivoted on an arm 72 fixed to the shaft 57. The opposite ends of the pawl 71 are adapted to engage shoulders 69, 70 on the segment. A stop 63 and arms 61, 62 limit the rocking movements of the shaft 57. Arms 56 of the shaft 57 are connected by rods 55 to arms 54, which rotate the eccentric bearings 52 of the cylinder 4, and so move this cylinder out of, or into, printing-contact with the cylinder 2. On the bearings 52 are pivoted double pawls 78, 79, which engage shoulders 84 on the cam bars 37, and operate these bars each time the cylinder is tripped. The pawls 78, 79 are rocked, to operate the bars 38 in opposite directions, by arms 80 of the pawls coming into contact with stop screws 81, 82. The damping-apparatus is carried by two side cheeks 92 pivoted on the ends of a shaft 90, and connected by a transverse bar 92<a> and by a transverse shaft 93. The damping-rollers 99 are journalled in pins fitted in sockets adjustably fixed on the cheeks 92 by bolts 103. Water is applied to a roller 122 in contact with the rollers 99, by a roller 123 in vibrating arms fixed on a shaft 117, from a roller 106 in the water trough. The rollers 106 and 122 are driven by trains of gearing from a wheel 115 in gear with a wheel on the shaft 3. The shaft 117 of the arms carrying the roller 123 is rocked by an arm 129 having a roller 130 engaging a cam 127 combined with a disc 128. The arm 129 is loose on the shaft 117 and is adjustably connected to it, to be moved positively with it in one direction, by a set-screw 202 working through an arm fixed to the shaft and engaging an abutment projecting from the arm 129. The roller 130 is adjustable laterally on the arm 129, and may be set to run on the disc 128 or on different parts of the helicallyshaped cam extension 127, to cause the roller 123 to contact with the roller 106 for a greater or less time, as required. The cheeks 92 are rocked to move the rollers 99 from the cylinder 2 as the inking-surface 10<a> passes them, by a cam 95 engaging a lever 97 bearing on a cam 94 on the shaft 93. The cheeks 92 may be rocked further down, for removal of the rollers 99, by turning the cam 94 by means of a hand-lever 131 on the shaft 93. The weight of the damping-apparatus keeps the cam 94 in contact with the lever 97.