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摘要

1454221 Feeding and delivering sheets PENNSYLVANIA RESEARCH ASSOCIATES Inc 2 Oct 1974 [18 Oct 1973] 42765/74 Heading B8R Delivering sheets.-Sheets advanced from accelerating wheels 28 in a gapped stream past a photoelectric counter pass each into one of a plurality of pockets formed between blades 34 secured to a wheel 33, the linear speed of the pockets being less than that of the sheets. The sheets are guided below a slotted plate 31 and are stripped from the pockets by a plate portion 38a so as to drop on to a plate 46 secured to a rod 41 pivoted at 42 and urged upwards by a spring 50 with a force adjustable by attaching the spring to a selected one of grooves 41d, 41e, 41f in the rod. The sheets are also pushed downwards on to the plate 46 by succeeding blades. As the stack increases, the plate 46 is lowered by the weight of the sheets. Feeding sheets.-Sheets are separated in turn from the bottom of a pile S in a hopper 14 having a slotted supporting plate 15 and a bent front plate 16 defining a throat 21 by a roller 17 having a friction projection 17b which also jogs the pile. The sheets are then advanced to grooved feed rollers 19 and upper rollers 20 which rotate in the same direction so as to prevent double feed by urging the upper of two sheets backwards. The rollers 20 enter the grooves in the rollers 19 so as to bend and stiffen the sheets. The sheets then pass to the accelerating wheels 28.