Patent ID: 9195175
Filing Date: 2015-11-24
Classification: G03G

Abstract:
1. A transfer device in which an outer circumferential surface of an endless belt moving along a predetermined loop-like path of movement is disposed so as to face a plurality of image bearing members including one image bearing member for monochrome and one or more image bearing members for color that bear developer images of mutually different hues and are aligned with each other, the transfer device comprising: the endless belt; a plurality of transfer members that are disposed so as to be opposed to the respective plurality of image bearing members across the endless belt on respective downstream sides of the plurality of image bearing members in a direction of movement of the endless belt and that sequentially transfer developer images borne by the respective plurality of image bearing members onto the endless belt; and a transfer member moving mechanism that moves the plurality of transfer members between pressing positions to cause the endless belt to be pressed against the respective plurality of image bearing members and separate positions to cause the endless belt to be separate from the respective plurality of image bearing members, the transfer member moving mechanism arranging a transfer member for monochrome corresponding to the image bearing member for monochrome and transfer members for color corresponding to the image bearing members for color at the respective pressing positions in full-color image forming, and arranging the transfer member for monochrome at the pressing position and the transfer members for color at the separate positions in monochromatic image forming, wherein the transfer member moving mechanism is configured to move the transfer member for monochrome so that the pressing position is on a downstream side from the separate position in the direction of movement of the endless belt, and causes a second pressing position of the transfer member for monochrome in monochromatic image forming to be different from a first pressing position of the transfer member for monochrome in full-color image forming so that an amount of pressing of the endless belt by the transfer member for monochrome becomes greater in monochromatic image forming than in full-color image forming.