Patent ID: 9213272
Filing Date: 2015-12-15
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a plurality of image bearing members to bear toner images of different colors on respective surfaces thereof; a plurality of toner image forming devices to form the toner images on the respective surfaces of the plurality of image bearing members; and a transfer unit including an intermediate transfer belt, to transfer the toner images on the respective surfaces of the plurality of image bearing members onto the intermediate transfer belt, the transfer unit including wherein a recessed portion in the holding member includes a first contact surface and a second contact surface, wherein the holding member changes the position of the one of the rollers between a multiple color mode for forming a multiple color image and a single color mode for forming a single color image, wherein in the multiple color mode the first contact surface of the holding member contacts the reference shaft and the intermediate transfer belt contacts the image bearing members, wherein in the single color mode the second contact surface of the holding member contacts the reference shaft and the intermediate transfer belt separates from at least one the image bearing members, wherein the holding member comprises a restriction member and a roller holder to hold the one of the rollers, wherein the restriction member is detachably attachable relative to the roller holder, wherein when the restriction member is detached from the roller holder and the one of the rollers is moved to a first position, the intermediate transfer belt retains slack and is detachable from the transfer unit, and when the restriction member is attached to the roller holder, the holding member contacts the reference shaft to restrict movement of the holding member.