Patent ID: 7657203
Filing Date: 2010-02-02
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image carrier that a plurality of toner images of differing colors are formed on a surface of the image carrier; an intermediate transfer belt positioned opposite the image carrier; an engaging/disengaging member capable of moving into and out of contact with the intermediate transfer belt; and a drive load fluctuation correction unit that corrects the drive load fluctuation of the intermediate transfer belt in accordance with the movement of a cleaning member into and out of contact with the intermediate transfer belt, wherein the toner images formed on the image carrier being primarily transferred onto an intermediate transfer belt in a superimposed condition, and being collectively secondarily transferred from the intermediate transfer belt onto a transfer material, the toner images of two of the colours set to be approximately identical in screen angle being consecutively transferred in a superimposed condition onto the intermediate transfer belt, while the toner images of two of the colours set to be approximately identical in screen angle are being superimposed onto the intermediate transfer belt, the engaging/disengaging member is prohibited to move into or out of contact with the intermediate transfer belt, the engaging/disengaging member corresponds to the cleaning member that cleans the surface of the intermediate transfer belt, and the drive load fluctuation correction unit includes a load application unit that corrects the drive load fluctuation of the intermediate transfer belt by applying a drive load to the intermediate transfer belt in response to the movement of the cleaning member into and out of contact with the intermediate transfer belt.