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

2006-06-06

2006-06-06

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Transfer

C198S806000, C198S840000, C399S165000, C399S302000

Reexamination Certificate

active

07058345

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, and a plurality of rollers around which the transfer belt14is laid with certain tension, wherein at least one of the rollers is a tension roller13for 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 device in contact with the transfer belt at a position opposing the tension roller; rotation preventing members which prevent the rotational torque from being transmitted to the cleaning device; and position restricting members which restrict the relative position between the cleaning device and the tension roller.

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