Primary transfer device and image forming apparatus having...

Details Primary transfer device and image forming apparatus having... Primary transfer device and image forming apparatus having...

2009-09-11

2011-10-25

Chen, Sophia S (Department: 2852)

Electrophotography

Control of electrophotography process

Responsive to copy media characteristic

C399S066000, C399S302000

Reexamination Certificate

active

08045869

ABSTRACT:
A primary transfer device includes a primary transfer roll that is capable of being engaged with and disengaged from an intermediate transfer member to which a developer image is primarily transferred; and a setting-changing unit that changes a setting of pressure of the primary transfer roll to the intermediate transfer member in accordance with kind of a recording medium to which the developer image is secondarily transferred, wherein the setting-changing unit has an irregular medium transfer mode for a case where the recording medium to which the developer image is a recording medium having irregularities formed on a surface thereof, and an ordinary transfer mode for a case where the recording medium is a recording medium other than the recording medium having the irregularities, wherein a pressure set in the irregular medium transfer mode is smaller than that set in the ordinary transfer mode.

REFERENCES:
patent: 2008/0285989 (2008-11-01), Yagi
patent: 2010/0080589 (2010-04-01), Yoshioka
patent: 10-020685 (1998-01-01), None
patent: 2006-018096 (2006-01-01), None
patent: 2007-033938 (2007-02-01), None
patent: 2007-127889 (2007-05-01), None
U.S. Appl. No. 12/414,813 entitled “Transfer Device and Image Forming Apparatus.” Inventor: Tomoaki Yoshioka; Filed: Mar. 31, 2009; Confirmation No. 1633.

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