High developing voltage supply apparatus

Details High developing voltage supply apparatus High developing voltage supply apparatus

2007-12-11

2007-12-11

Grainger, Quana (Department: 2852)

Electrophotography

Image formation

Development

C399S228000, C399S285000

Reexamination Certificate

active

10600468

ABSTRACT:
A high developing voltage supply apparatus includes solenoid power switches, and a high developing voltage driver selectively outputting a solenoid driving signal to close one of the solenoid power switches to electrically close a corresponding mechanical contact, applying a high developing voltage to one of color development rollers corresponding to the mechanical contact closed and Kased on an image to be printed. A high developing voltage supply supplies the high developing voltage to developing roll shafts of the other color development rollers to stabilize potentials of the developing roll shafts, or, in the alternative, the high developing voltage supply apparatus may include a voltage supply supplying a self-biased voltage to the other color development rollers using the high developing voltage formed with a DC voltage VDCand an AC voltage VACsuperimposed.

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Chinese Office Action issued May 12, 2006 in Chinese Patent Application No. 03126397.6 which corresponds to U.S. Appl. No. 10/600,468.

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