Image forming apparatus provided with transfer and separation device

摘要

An image forming apparatus having: a drum-shaped image carrier; a transfer and separation device which comprises: a conveyor belt for conveying a transfer material; a transfer roller for supporting the conveyor belt; and a nip regulating roller that is disposed downstream of the transfer roller in a conveyance direction of the transfer material; and a transfer region changing section adapted to change a downstream end of the transfer region in a conveyance direction of the transfer material by changing a position of the nip regulating roller; wherein the transfer region changing section sets the nip regulating roller, at a first position at which the conveyor belt is supported such that a direction of separation of the conveyor belt from the image carrier at the downstream end of the transfer region coincides with a tangential direction with respect to the image carrier, or at a second position.