Image forming apparatus and image forming method

Details Image forming apparatus and image forming method Image forming apparatus and image forming method

2007-04-17

2009-12-15

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of transfer

C399S299000, C399S302000

Reexamination Certificate

active

07634207

ABSTRACT:
The present invention provides an image forming apparatus. The image forming apparatus includes plural image carriers, an endless intermediate transfer belt, plural first transfer members and a second transfer member. The image forming apparatus starts application of the transfer bias sequentially from the first transfer members disposed upstream and continues to apply the transfer bias to two or more of the first transfer members until the recording medium enters a transfer position where the toner images are transferred by the second transfer member.

REFERENCES:
patent: 2004/0190919 (2004-09-01), Iwasaki et al.
patent: 2006/0067729 (2006-03-01), Ikeda et al.
patent: 2006/0127115 (2006-06-01), Iwasaki et al.
patent: 2006/0210326 (2006-09-01), Takehara et al.
patent: 2001-154561 (2001-06-01), None
patent: 2005-17864 (2005-01-01), None
patent: 2005-107118 (2005-04-01), None
patent: 2005-148198 (2005-06-01), None

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