Patent ID: 7650099

Claim:
An image forming apparatus comprising: a unit that can be positioned at a first position and a second position with respect to a main body of the apparatus; a belt which is arranged to be placed in a pressurized state or a pressure-released state; a support member in contact with an internal surface of said belt; a tension member which moves said support member, which movement puts said belt in the pressurized state; and a restriction member for restricting a movement of said support member, wherein said unit is stored in the main body in the first position and is extracted from the main body in the second position; and said support member is released from the restriction of said restriction member and subject to movement by said tension member when said unit is moved from the first position to the second position, and said support member is maintained on release from the restriction of said restriction member even if said unit is moved from the second position to the first position.