Electrophotography – Image formation – Charging
Patent
1995-09-21
1997-01-21
Royer, William J.
Electrophotography
Image formation
Charging
361221, 399297, G03G 1502
Patent
active
055963951
ABSTRACT:
An image forming apparatus having a single driving source to move a charging roller and a transfer roller to be in contact with and separated from a photoreceptor to place the charging member and the transfer member in various states in relation to the photoreceptor as the image forming apparatus demands. The single driving source includes first and second cams having a common axis of rotation. One cam is used to move the charging member and the other cam is used to drive the transfer member. The control system is provided with a device for recognizing the current positions of the charging member and the transfer member in relation to the photoreceptor and a device for prescribing future positions of the charging member and the transfer member in relation to the photoreceptor after having been driven. The apparatus further includes a controller which operates the driving source until the charging member and the transfer member come to a state prescribed as the state to reach after from the current position.
REFERENCES:
patent: 5051783 (1991-09-01), Sato
patent: 5227851 (1993-07-01), Yoshida et al.
patent: 5415966 (1995-05-01), Matsuura
patent: 5420676 (1995-05-01), Arcaro
Itoh Fumihito
Sawamura Tadahide
Tawada Takaaki
Ricoh & Company, Ltd.
Royer William J.
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