Bottom sheet feeding apparatus

Details Bottom sheet feeding apparatus Bottom sheet feeding apparatus

1977-07-27

1979-05-22

Stoner, Jr., Bruce H.

Sheet feeding or delivering

Feeding

Separator and conveyor

271 31, 271100, 271160, 271165, B65H 106, B65H 308

Patent

active

041555465

ABSTRACT:
Apparatus for feeding sheets one-at-a-time from the bottom of a stack of sheets. The apparatus includes a conventional suction assembly moveable into contact with the bottom sheet in the stack to attach itself to that sheet, and thereafter moveable away from the stack to carry that sheet toward a utilization device. Although such a feeding system is usually effective, it has been found that the suction assembly will not reliably attach itself to the bottom sheet when that sheet is curled, arched or otherwise deformed even if only to a relatively minor extent. To alleviate this deficiency, the present invention provides a hold-down assembly moveable with the suction assembly to press down against the top of the stack to press out any deformations in the sheets while the suction assembly is operating to ensure that it will reliably attach itself to the bottom sheet. The present invention is particularly designed for use in printing systems to transfer a printing plate from a platemaking section to a printing press section of the system although the invention has general application in a variety of other fields.

REFERENCES:
patent: 1388678 (1921-08-01), Weightman et al.
patent: 3424452 (1969-01-01), Jones
patent: 3934868 (1976-01-01), Selak
patent: 4053152 (1977-10-01), Matsumoto

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