Image forming apparatus having a developing/cleaning device

Details Image forming apparatus having a developing/cleaning device Image forming apparatus having a developing/cleaning device

1998-11-03

2000-05-16

Chen, Sophia S.

Electrophotography

Control of electrophotography process

Control of charging

399 53, 399149, 399175, G03G 1500

Patent

active

060648376

ABSTRACT:
An image forming apparatus includes an image bearing member for bearing an image. A charging device is supplied with a voltage. The charging device includes a magnetic brush contactable to the image bearing member to electrically charge the image bearing member. A developing device develops, at a developing position, an electrostatic image formed on the image bearing member using a charging operation of the charging device, with toner having the same polarity as a charging polarity of the charging device, into a toner image. The developing device is capable of removing residual toner from the image bearing member. The developing device stops its developing operation if an area of the image bearing member, which has been charged by the charging device when the charging device is being supplied with an oscillating voltage in the form of superimposed AC and DC voltages, is still at the developing position.

REFERENCES:
patent: 5282007 (1994-01-01), Oshiumi
patent: 5541717 (1996-07-01), Saito et al.
patent: 5659852 (1997-08-01), Chigono et al.
patent: 5822659 (1998-10-01), Ishiyama
patent: 5845172 (1998-12-01), Saito et al.
patent: 5864736 (1999-01-01), Shimada et al.

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