Transfer belt device and image forming apparatus provided...

Details Transfer belt device and image forming apparatus provided... Transfer belt device and image forming apparatus provided...

2011-05-03

2011-05-03

Brase, Sandra L (Department: 2884)

Electrophotography

Image formation

Transfer

C399S302000

Reexamination Certificate

active

07937031

ABSTRACT:
An transfer belt device includes a roller support supporting transfer rollers, a cam driving shaft having a cam, the cam having capability of swinging the roller support to move the transfer rollers toward and apart from color photosensitive drums to thereby switch a transfer belt and the color photosensitive drums between a state where the transfer belt is in contact with the color photosensitive drums and a state where the transfer belt is out of contact with the color photosensitive drums, a tension roller kept in contact with a surface of the transfer belt to exert tension on the transfer belt, and a pivotal axis on which the tension roller is swingably supported, the pivotal axis being common with the cam driving shaft.

REFERENCES:
patent: 5765082 (1998-06-01), Numazu et al.
patent: 6029023 (2000-02-01), Munemori et al.
patent: 6061542 (2000-05-01), Minami et al.
patent: 7561840 (2009-07-01), Morimoto et al.
patent: 7664444 (2010-02-01), Mochizuki
patent: 7672605 (2010-03-01), Kayahara et al.
patent: 1864107 (2006-11-01), None
patent: 2002-99132 (2002-04-01), None

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