Patent ID: 6418294
Filing Date: 2002-07-09
Classification: G03G

Abstract:
A color image forming apparatus comprising:an intermediate transfer belt having a movable surface; a first image forming unit for forming a first toner image of a first color on the intermediate transfer belt at a predetermined image forming pitch; a second image forming unit for forming a second toner image of a second color to superimpose on the first toner image formed on the intermediate transfer belt at the predetermined image forming pitch, the second image forming unit being disposed downstream of the first image forming unit with respect to the surface-moving direction of the intermediate transfer belt; a third image forming unit for forming a third toner image of a third color to superimpose on the first and the second toner images formed on the intermediate transfer belt at the predetermined image forming pitch, the third image forming unit being disposed downstream of the second image forming unit with respect to the surface-moving direction of the intermediate transfer belt; a fourth image forming unit for forming a fourth toner image of a fourth color to superimpose on the first, the second and the third toner images formed on the intermediate transfer belt at the predetermined image forming pitch, the fourth image forming unit being disposed downstream of the third image forming unit with respect to the surface-moving direction of the intermediate transfer belt; and a transfer roller for transferring the superimposed toner images formed on the intermediate transfer belt onto a sheet of paper; wherein the peripheral length of the intermediate transfer belt is a non-integral multiple of the image forming pitch.