Patent ID: 7254358

Claim:
A color image forming apparatus for forming a color image, comprising: (a) a plurality of photoreceptors each for carrying a toner image having a color different from each other; (b) a plurality of developing devices each for forming each of the color toner images on each of the plurality of photoreceptors; (c) a plurality of primary transferring devices each for primary transferring each of the toner images successively onto an intermediate transfer belt; (d) a intermediate transfer belt for carrying a color toner image which has been primary transferred and superimposed; (e) a secondary transferring device for secondary transferring concurrently the color toner image onto a transfer material; (f) a drive roller provided between one of the plurality of primary transferring devices which is arranged on the most downstream side of the intermediate transfer belt in a moving direction thereof and the secondary transferring device, and inside the intermediate transfer belt for driving the intermediate transfer belt; (g) a discharger provided facing the drive roller for discharging the color toner image on the intermediate transfer belt; and (h) a controller for controlling the discharger and a drive of the drive roller, wherein the controller operates the discharger at least from a start time of the primary transferring to a completion of the secondary transferring.