Patent ID: 7697876
Filing Date: 2010-04-13
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an intermediate transfer member adapted to be able to form a color image by superposing and transferring images formed on image carriers; a secondary transfer unit adapted to transfer, onto a printing medium, the color image formed on said intermediate transfer member; a first detection unit adapted to be arranged at a first position and face said intermediate transfer member; a second detection unit adapted to be arranged at a second position upstream of the first position in a conveyance direction of said intermediate transfer member and face said intermediate transfer member; a determination unit adapted to determine whether a result of detecting, by said second detection unit, a first reference image formed on said intermediate transfer member is not larger than a predetermined value; and a control unit adapted to, when said determination unit determines that the result of detecting the first reference image is not larger than the predetermined value, control conveyance of the printing medium to said secondary transfer unit on the basis of the first reference image detected by said first detection unit, and when said determination unit determines that the result of detecting the first reference image is larger than the predetermined value, control conveyance of the printing medium to said secondary transfer unit on the basis of the first reference image detected by said second detection unit.