Cut sheet feeder for image forming apparatus

Details Cut sheet feeder for image forming apparatus Cut sheet feeder for image forming apparatus

1994-03-15

1995-07-25

Bollinger, David H.

Sheet feeding or delivering

Feeding

Multiple supplies

271152, 271157, 271 909, 271 911, B65H 344

Patent

active

054355362

ABSTRACT:
A cut sheet feeder for use with an image forming apparatus, is formed of: a sheet feed mechanism for picking up stacked cut sheets one at a time from a single sheet feed position and for feeding each sheet to an image recording portion; a sheet feed unit which is vertically movable relative to the sheet feed mechanism and to which a cassette containing cut sheets may be attached in a detachable manner; a sheet feed table which is vertically movable within the sheet feed unit and which carries a large number of cut sheets; a plurality of detectors for detecting the positions of the sheet feed unit, the sheet feed table and the cut sheets relative to the sheet feed position; and a sheet overload detector. The overload is detected by the detectors with respect to the relative position between the sheet feed unit and the sheet feed table with reference to the sheet feed position. A mode controller controls the vertical movement of the sheet feed unit and the sheet feed table and stops the vertical movement when the detection signal from the sheet overload detector is admitted.

REFERENCES:
patent: 4332375 (1982-06-01), Tsubo
patent: 4660820 (1987-04-01), Shino et al.

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