Patent ID: 7796927
Filing Date: 2010-09-14
Classification: G03G

Abstract:
1. A color image forming apparatus comprising: a first development device which develops an electrostatic image on a first image bearing member with toner of color other than black so as to form a toner image and collects toner on the first image bearing member; an image receiving member to which the toner image is transferred; a first transfer member which forms a nip portion for nipping the image receiving member with the first image bearing member and transfers the toner image on the first image bearing member electrostatically to the image receiving member; a second development device which develops an electrostatic image on a second image bearing member with black toner so as to form a toner image and collects the toner on the second image bearing member; and a second transfer member which forms a nip portion for nipping the image receiving member with the second image bearing member and transfers the toner image on the second image bearing member electrostatically to the image receiving member, wherein a first contact position where the first transfer member is contacting the image receiving member is on a downstream side relative to a position of a center of rotation of the first image bearing member in a moving direction of the image receiving member, wherein a second contact position where the second transfer member is contacting the image receiving member is on a downstream side relative to a position of a center of rotation of the second image bearing member in a moving direction of the image receiving member, and wherein a distance along the path of the image receiving member between a center of rotation of the second image bearing member and the second contact position is larger than a distance along the path of the image receiving member between a center of rotation of the first image bearing member and the first contact position.