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

1995-08-15

Bollinger, David H.

Sheet feeding or delivering

Feeding

Multiple supplies

271157, 271162, B65H 344

Patent

active

054412463

ABSTRACT:
A cut sheet feeder for an image forming apparatus is basically formed of one sheet feed mechanism for picking up stacked cut sheets at a single sheet feed position, a sheet feed unit vertically movable relative to the sheet feed mechanism, a cassette detachably attached to the sheet feed unit and containing the cut sheets, and a sheet feed table vertically movably situated inside said sheet feed unit and carrying a large number of the cut sheets.. The feeder further includes a cassette presence detection device for detecting presence or absence of the cassette on the sheet feed unit, a cover detection device for indicating an opening status of a cover for the sheet feed unit, a mode establishment device for establishing a cassette feed mode or a table feed mode, and a mode control device for controlling the sheet feed unit. The mode control device lowers the sheet feed unit to a predetermined position in case the cassette feed mode is changed to the table feed mode by the mode establishment device while the cover detection device outputs a detection signal indicating a closed status of the cover and the cassette presence detection device outputs a signal indicating the presence of the cassette.

REFERENCES:
patent: 4332375 (1982-06-01), Tsubo
patent: 5335901 (1994-08-01), Nonomura et al.

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