Charging device and image forming apparatus

Details Charging device and image forming apparatus Charging device and image forming apparatus

2007-02-27

2007-02-27

Gray, David M. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

Reexamination Certificate

active

10463448

ABSTRACT:
A charging device including: a first charger which charges a member to be charged, the first charger having conducting particles which come into contact with the member to be charged; a second charger which charges the member to be charged in a same polarity as charging polarity of the first charger on an upstream side of the first charger in a moving direction of the member to be charged; and a controller which controls application of a charging voltage to the first charger, in which the controller turns a charging voltage on or off in an area of the member to be charged which is not subjected to charging by the second charger.

REFERENCES:
patent: 4265991 (1981-05-01), Hirai et al.
patent: 5134407 (1992-07-01), Lorenz et al.
patent: 5457522 (1995-10-01), Haneda et al.
patent: 5943533 (1999-08-01), Ogata et al.
patent: 6134407 (2000-10-01), Ishiyama et al.
patent: 60-35059 (1985-08-01), None
patent: 10-307454 (1998-11-01), None
patent: 10-307459 (1998-11-01), None

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