Patent ID: 11934117
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
an image bearing member configured to bear a toner image;
an intermediate transfer belt configured to contact the image bearing member and to which the toner image is to be transferred from the image bearing member, wherein the intermediate transfer belt is endless and conductive and includes a base layer, a surface layer formed on an outer circumferential surface side of the base layer, and an inner surface layer formed on an inner circumferential surface side of the base layer; and
a contact member configured to contact the intermediate transfer belt from an opposite side of the image bearing member contacting the intermediate transfer belt,
wherein, with respect to a rotation center of the image bearing member and as seen from a rotation shaft direction of the image bearing member, a position at which the contact member and the intermediate transfer belt contact is arranged downstream from the image bearing member in a rotation direction of the intermediate transfer belt,
wherein Rv>Rs1 and Rs2>Rs1, and Rs2/Rv≤40 are satisfied where Rv (Ω) is a volume resistance value of the intermediate transfer belt in a thickness direction, Rs1 (Ω) is a first surface resistance value of the inner surface layer side in a surface direction, and Rs2 (Ω) is a second surface resistance value on the surface layer side in a surface direction, and
wherein the volume resistance value Rv is a value in a range from 2.60×106 (Ω) to 3.51×107 (Ω).