Transfer device and image forming apparatus

Details Transfer device and image forming apparatus Transfer device and image forming apparatus

2011-01-11

2011-01-11

Gray, David M (Department: 2852)

Electrophotography

Image formation

Transfer

C399S071000, C399S099000, C399S314000, C399S317000, C399S345000

Reexamination Certificate

active

07869751

ABSTRACT:
An endless belt is supported by a plurality of rollers. A transfer roller comes in contact with an outer surface of the belt to form a transfer nip. An auxiliary member makes contact with a recording medium on an upstream side of the transfer nip in a movement direction of the belt, to cause the recording medium to be in close contact with the outer surface of the belt. A bias applying unit applies to the auxiliary member a bias for electrostatically transferring a toner adhered to the auxiliary member to the outer surface of the belt.

REFERENCES:
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patent: 2007/0160396 (2007-07-01), Adachi et al.
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patent: 2007/0217832 (2007-09-01), Oyama et al.
patent: 2007/0231023 (2007-10-01), Miyazaki
patent: 2007/0269233 (2007-11-01), Sakashita et al.
patent: 2008/0028967 (2008-02-01), Sakashita et al.
patent: 2008/0050158 (2008-02-01), Hatayama et al.
patent: 2001117375 (2001-04-01), None
patent: 2002-132065 (2002-05-01), None
patent: 4038238 (2007-11-01), None
U.S. Appl. No. 12/135,490, filed Jun. 9, 2008, Miyazaki, et al.

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