Image forming apparatus with improved transfer roller

Details Image forming apparatus with improved transfer roller Image forming apparatus with improved transfer roller

2009-04-09

2011-11-15

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S045000, C399S313000

Reexamination Certificate

active

08059980

ABSTRACT:
An image forming apparatus is provided with an image bearing member for transferring an image to a transfer material using a developer, a transfer roller arranged in contact with the circumferential surface of the image bearing member for forming a transfer nip portion, and a displacing drive part for displacing a surface contact position corresponding to a position of the circumferential surface of the image bearing member where the transfer nip portion is formed by the contact of the transfer roller at least to either one of a first position and a second position different from the first position.

REFERENCES:
patent: 7606507 (2009-10-01), Soshiroda
patent: 2010/0215387 (2010-08-01), Ishikawa
patent: 05127458 (1993-05-01), None
patent: 07168465 (1995-07-01), None
patent: 10020615 (1998-01-01), None
patent: 2001005311 (2001-01-01), None
patent: 2001-106374 (2001-04-01), None

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