Electrophotography – Image formation – Transfer
Reexamination Certificate
2006-05-30
2006-05-30
Chen, Sophia S. (Department: 2852)
Electrophotography
Image formation
Transfer
C399S302000
Reexamination Certificate
active
07054585
ABSTRACT:
An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.
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Aoyama Yuichi
Miyawaki Katsuaki
Obu Makoto
Sasamoto Tetsurou
Suzuki Minoru
Chen Sophia S.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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