Transfer belt unit and image forming apparatus using the same

Details Transfer belt unit and image forming apparatus using the same Transfer belt unit and image forming apparatus using the same

2005-03-08

2005-03-08

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Transfer

C399S101000, C399S121000

Reexamination Certificate

active

06865361

ABSTRACT:
A transfer belt unit and image forming apparatus that achieves the reduction in size and cost of a transfer belt unit and can prevent fluctuation of the cleaning performance. The unit has a transfer belt, a plurality of rollers around which the transfer belt is laid with certain tension, wherein at least one of the rollers is a tension roller for tensioning to the transfer belt; frames supporting the plurality of rollers; tensioning mechanisms which are disposed on the side faces of the frames to bias the tension roller in a belt tensioning direction; a cleaning mechanism in contact with the transfer belt at a position opposing the tension roller; rotation preventing members which prevent the rotational torque form being transmitted to the cleaning mechanism; and position restricting members which restrict the relative position between the cleaning mechanism and the tension roller.

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