Patent ID: 7389069

Claim:
An image forming apparatus comprising: a unit including at least two rotary members; and an apparatus main body configured to detachably mount the unit, the apparatus main body including a first rotational drive source, drive rotary members corresponding to the at least two rotary members and engaging with the at least two rotary members, directly or indirectly, to rotate the at least two rotary members, respectively, and a drive force transmission mechanism transmitting a drive force of the first rotation drive source to the drive rotary members, wherein the unit includes another rotary member between two rotary members of the at least two rotary members, and wherein the apparatus main body includes a second rotational drive source integrally mounted to said unit having said at least two rotary units independent from the first rotational drive source, and a second drive rotary member driven by the second rotation drive source and engaging with the second rotary member to rotate the second rotary member.