Patent ID: 11953848
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The belt unit according to claim 1,
wherein
the belt unit is an intermediate transfer unit, the intermediate transfer unit comprising:
as the belt, an intermediate transfer belt on which toner images formed on image carriers are sequentially laid one on another; and
as the stretching rollers,
a driving roller that is arranged in contact with an inner circumferential surface of the intermediate transfer belt and that drives the intermediate transfer belt to rotate,
a tension roller that rotates following the intermediate transfer belt and that applies a predetermined tensional force to the intermediate transfer belt,
a plurality of primary transfer rollers that are pressed against the image carriers via the intermediate transfer belt, and
backup rollers that are arranged between the driving roller and the primary transfer rollers and between the tension roller and the primary transfer rollers.