Drive control for sheet-conveying endless belt

Details Drive control for sheet-conveying endless belt Drive control for sheet-conveying endless belt

1995-03-21

1996-06-25

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

271273, 27126501, 27126502, 355208, G03G 1516, B65H 502

Patent

active

055305350

ABSTRACT:
An endless belt which stays separated from a photoreceptor and is made to press the photoreceptor as required is wound around driving and driven rollers with some slack. When a front sheet-end sensor detects a front end of a sheet, the detection signal activates the driving roller to rotate in a forward or sheet conveying direction while the driven roller is kept in the stopped mode. By this rotation, the slack is canceled so that the endless belt presses the photoreceptor, setting up a sheet conveying mode. When a rear sheet-end sensor detects a rear end of the sheet, the driving roller is turned in the reversed direction. By this operation, the endless belt is loosened to separate from the photoreceptor.

REFERENCES:
patent: 4515460 (1985-05-01), Knechtel
patent: 5189470 (1993-02-01), Matsuda et al.
patent: 5216453 (1993-06-01), Itoh
patent: 5294958 (1994-03-01), Isobe et al.
patent: 5435542 (1995-07-01), Van Pham et al.

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