Developing apparatus having stop period during which no AC elect

Details Developing apparatus having stop period during which no AC elect Developing apparatus having stop period during which no AC elect

1997-08-29

1999-01-12

Lee, S.

Electrophotography

Control of electrophotography process

Control of developing

399285, G03G 1506, G03G 1508

Patent

active

058600400

ABSTRACT:
A developing apparatus is so adapted that in performing development upon converting a developer to a developing area opposite to an image carrying member by a developer carrying member with the developer held on the surface of the developer carrying member as well as alternately repeating an exertion period during which an AC electric field is exerted between the developer carrying member and the image carrying member and a stop period during which no AC electric field is exerted, the AC electric field is exerted in such a manner that the directions of the first and last electric field portions of the AC electric field in one exertion period are the same, and the direction of the last electric field portion of the AC electric field in the exertion period and the direction of the first electric field portion of the AC electric field in the subsequent exertion period after an elapse of the stop period are the same.

REFERENCES:
patent: 4611531 (1986-09-01), Hayashi et al.
patent: 4688923 (1987-08-01), Kohyama et al.
patent: 5187523 (1993-02-01), Osawa
patent: 5202731 (1993-04-01), Tanikawa et al.
patent: 5338894 (1994-08-01), Uchiyama et al.
patent: 5463452 (1995-10-01), Inaba et al.
patent: 5610696 (1997-03-01), Kemmochi et al.
patent: 5752140 (1998-05-01), Danzuka et al.

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