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

1995-08-01

Bollinger, David H.

Sheet feeding or delivering

Feeding

Multiple supplies

271162, B65H 344

Patent

active

054374430

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 cassette presence detection device for detecting the presence and absence of a cassette on the sheet feed unit and for outputting a signal indicating either the presence or the absence of the cassette; a power switch for starting and stopping the cut sheet feeder; and a mode establishment device. A cassette feed mode involving the cassette for minority sheet feed is established if the detection signal from the cassette presence detection device indicates the presence of the cassette when the power switch is turned on, and a table feed mode involving the sheet feed table for majority sheet feed is established if the detection signal from the cassette presence detection device indicates the absence of the cassette.

REFERENCES:
patent: 4332375 (1982-06-01), Tsubo
patent: 5138373 (1992-08-01), Hoyer

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