GB1090202A - Improvements in or relating to sheet feeding mechanisms - Google Patents

Abstract

1,090,202. Feeding Sheets. GESTETNER Ltd. Feb. 10, 1966 [Feb. 16, 1965], No. 6643/65. Heading B6B. Sheets are separated from the top of a pile 3 and fed to a duplicating or other machine by a reciprocating friction member 1 associated with a presser member 4, the latter being raised and lowered in synchronism with the movements of the separator 1 to engage and hold the rest of the sheets on the pile during the separation of the top sheet, and being readily removable from the separator structure. The separator 1 is carried by a mounting 2 for movement to the left in the lowered position to feed a sheet, and a raised position during a return stroke, by conventional means including two cams. The presser member 4 carries a back stop 14 for engaging the rear of the stack 3, and two rubber pads 15, one on each side of the stop 14, and is connected rotatably at 13 to the end of an arm 5 on a rod 6 which is axially slidable in a bracket 7. The bracket 7 is mounted on the mounting 2 for vertical movement thereon by means of rollers and guides 8, 9, and can be raised and lowered by a cam 10 on a driveshaft 11 which may control the movements of the separator 1. Thus, the presser member 4 and stop 14 can be adjusted relatively to the separator, and is raised and lowered in synchronism with the separator. A front stop 16 on the front plate 19 of the stack holder is pivotal by cam means to allow the top sheet to be separated. The assembly of presser 4, 14, 5, 6, 7, 8, 10 and 12 is duplicated on the other side of the stack 3, and each assembly is readily removable as a unit from the machine. In a modification (Figs. 2-6), the presser member (20) is adjustably secured on the lower limb (21) of a cranked support rod (22) carried by a block (23) which is slidably mounted on two parallel rods (24), but can be locked in position by a lever (26) and cam (27). The presser (20) has a back stop (30) for the stack (3) and a rubber pad (31) to engage the rear edge of the sheet below the uppermost sheet. The rods (24) are received in recesses in a block (33) which is guided for vertical movement by studs (35) on the machine frame (34) engaging grooves (36) in the block. A pin (38) on a camoperated lever (39) projects through a further groove (37) in the block (33), and this pin is engaged by the bottom edge of a plate (45) which is mounted for vertical adjustment on the block (33); thus the position of the plate (45) determines the vertical height of the presser (20), and the raising and lowering of the pin (38) causes raising and lowering of the block (33) and presser (20). The parts of this modification can also be removed as a unit from the machine.