Patent ID: 9581940
Date: 2017-02-28
CPC Classifications: G03G

Claim:
1. A transfer device comprising: a plurality of primary transfer rollers, each of which selectively takes (i) a contact position where an intermediate transfer belt is brought into contact with a corresponding image holding member, and (ii) a separation position where the intermediate transfer belt is separated from the corresponding image holding member; a tension applying roller on which the intermediate transfer belt is wound thereon together with a driving roller and which is urged in a direction receding from the driving roller; and a relaxing member that is attached to a shaft portion of the tension applying roller, is urged by an urging unit in a direction approaching the driving roller, and relaxes an urging force of the tension applying roller in a direction receding from the driving roller when at least four of the plurality of primary transfer rollers are at the separation position, wherein when the at least four primary transfer rollers are at the separation position, tension of the intermediate transfer belt is larger than that generated due to the weight of the at least four primary transfer rollers at the contact position.