Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1987-05-28
1988-06-14
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Separator and conveyor
271110, 271120, 271121, 271127, B65H 352
Patent
active
047507268
ABSTRACT:
In a sheet feeding system for a copier, for the sequential separation and feeding of individual sheets from a stack of sheets by an impact type sheet feeder, there is provided a plural mode stack repositioning system for automatically repositioning the top sheet of the stack of sheets into an optimum feeding position relative to the impact sheet feeder, which optimum feeding position is closely adjacent to, but slightly spaced below, a maximum limit position of the top of the stack. This stack repositioning system further provides a retard repositioning mode in which the stack of sheets is automatically lowered into a retard position after each sheet feed has been initiated, which retard position is substantially below the optimum feeding position, in response to a sheet feeding sensor detecting a sheet being successfully fed from the stack by the impact sheet feeder and acquired by a take-away feeding system. Fixed position frictional sheet retard members are positioned to frictionally engage the next underlying sheet of the stack in this retard position to resist double sheet feeding. These retard members are not in the sheet feeding path in the optimum or initial sheet feeding position of the stack. There are also provided arrangements for arcuately deflecting the sheets being fed out to and by the take-away feeding system to provide increased normal force against the retard members in the retard position of the stack.
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Schacher Richard A,.
Xerox Corporation
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