| 摘要 |
<p>1,163,399. Cutting-out labels. PRINTING MACHINERY CO. 3 April, 1968 [14 April, 1967], No. 15994/68. Heading B4B. In a die cutting machine for labels, similar to that described in Specification 1,098,098, i.e. having a frame including a table 5, an anvil 3 attached to a plunger 4 which is mounted for reciprocation in a column 2 of the machine, a die being supported above the table for cutting a stack of labels located on the anvil, and a pusher means for pushing a stack of labels from a loading position to the cutting position on the anvil, the pusher means includes a pusher finger 6 which is carried in a member 7 secured to the piston 8 of a double-acting pneumatic cylinder 9, the arrangement being such that after the completion of a pushing stroke, the finger 6 is retracted below the surface of the table 5 and retained there during the return stroke, the finger being projected above the surface of the table at the end of the return stroke. The finger abuts switches 33, 34 at the end and beginning of the return stroke, the switches energizing solenoids (35, 36), Fig. 6 (not shown), which actuate the valve (37) to cause the finger to be raised and lowered respectively. The cylinder 9 is carried on a member 12 which is reciprocated by means of a link 16 connected to a bell-crank lever 17 which is pivoted to the follower 19 of a cam 20 mounted on the main shaft 21 of the machine. The link 16 carries at its free end a freely rotatable pinion (30), Fig. 2 (not shown), which operates between a rack 31 mounted on the machine and a rack (32) mounted on the member 12 so that the member 12 is caused to move at twice the speed of the axis of the pinion (30). The main motor M of the machine is connected to pinion 26 through a variable speed drive VSD. Safety switches 40, 41 are provided which are operable by the finger 6 to prevent operation of the machine in either direction in the event of improper functioning of the projecting or retracting machine.</p> |
