Image forming apparatus, transfer unit thereof, and method...

Details Image forming apparatus, transfer unit thereof, and method... Image forming apparatus, transfer unit thereof, and method...

2011-01-25

2011-01-25

Porta, David P (Department: 2884)

Electrophotography

Image formation

Transfer

C399S302000

Reexamination Certificate

active

07877048

ABSTRACT:
An image forming apparatus according to the present invention includes a first photoconductive member used during monochrome printing; a plurality of second photoconductive members used together with the first photoconductive member during full-color printing and arranged in parallel to the first photoconductive member; a transfer belt that forms a loop-like moving path; a first transfer roller and a plurality of second transfer rollers provided on an inner peripheral side of the transfer belt; and a link member that shifts, during the full-color printing, the second transfer rollers to positions where the second transfer rollers are brought into press contact with the respective second photoconductive members via the transfer belt and shifts, during the monochrome printing, the second transfer rollers to positions where respective separations between an inner peripheral surface of the transfer belt and the respective second transfer rollers are substantially identical.

REFERENCES:
patent: 6963715 (2005-11-01), Kanekura et al.
patent: 2002/0044799 (2002-04-01), Sasamoto et al.
patent: 2007/0116496 (2007-05-01), Morimoto et al.
patent: 11-338220 (1999-12-01), None
patent: 2004-163795 (2004-06-01), None
patent: 2005-062642 (2005-03-01), None

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