Patent ID: 6564021
Filing Date: 2003-05-13
Classification: G03G

Abstract:
An image forming apparatus comprising:a first image bearing member for bearing an image; a second image bearing member for bearing an image; an intermediate transfer member; first transfer means for transferring the image on said first image bearing member to said intermediate transfer member in a first transfer position by voltage applied to said first transfer means; second transfer means for transferring the image on said second image bearing member to said intermediate transfer member in a second transfer position by voltage applied to said second transfer means, wherein, after images of plural colors are sequentially transferred from said first image bearing member and said second image bearing member to said intermediate transfer member in said first transfer position and said second transfer position, said images of plural colors on said intermediate transfer member are transferred to a transfer material; and detecting means for detecting a first image for detection and a second image for detection transferred from said first image bearing member and said second image bearing member to said intermediate transfer member, wherein the voltage applied to said second transfer means when said first image for detection passes through said second transfer position is zero.