Recirculating document feeder

Sheet feeding or delivering – Delivering to stack and feeding therefrom – With sheet sensor for selective location

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Details

271 5, 271 35, 271186, 271902, B65H 522

Patent

active

050694367

ABSTRACT:
A recirculating document feeder for use with an electrostatographic apparatus for producing precollated or post-collated simplex or duplex copies from simplex or duplex original documents with a transport arrangement which simplifies operational control over the feeder and reduces the potential of damage to the original document sheets. The document feeder comprises a hopper for holding a stack of original document sheets. A transport mechanism is provided for respectively transporting an original document sheet along a path in which such sheet is removed in one direction from the stack hopper and delivered in such direction to an exposure station; or a path in which such sheet is removed in a direction opposite to the one direction from the stack hopper, turned over, and delivered to the exposure station. The transport mechanism is selectively controlled to carry out delivery of document sheets depending upon whether the original documents in the stack hopper are simplex or duplex. Further, an original document sheet is selectively clamped to a transport mechanism at the exposure station for recirculation or passed directly back to the hopper to respectively carry out pre-collation or post-collation copying.

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