Electrophotography – Control of electrophotography process – Control of charging
Patent
1996-05-28
1998-11-24
Royer, William J.
Electrophotography
Control of electrophotography process
Control of charging
361221, 361225, 399174, 399176, G03G 1502
Patent
active
058420819
ABSTRACT:
A charging method in which the surface of an image bearing device is charged in two steps in contact with the surface of the image bearing device before a latent image is formed on the surface of the image bearing device, the contact charging method includes two steps. First, the surface of the image bearing device is charged with a contact charging device which applies a voltage consisting of an AC component and a DC component superposed on the AC component. Second, the surface of the image bearing device is charged by a contact charging device applied with such a DC voltage as to discharge at least part of a pattern of charge potential variation of which the pitch corresponds to the frequency pitch of the AC component, which is caused in the primary charging operation.
REFERENCES:
patent: 4371252 (1983-02-01), Uchida et al.
patent: 5426488 (1995-06-01), Hayakawa et al.
patent: 5446615 (1995-08-01), Matsumoto et al.
patent: 5483323 (1996-01-01), Matsuda et al.
patent: 5610691 (1997-03-01), Takahashi et al.
Arai Akio
Ishii Yasutomo
Iwasaki Jin
Kaname Yoichi
Katsuno Ryuji
Fuji 'Xerox Co., Ltd.
Royer William J.
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