Patent ID: 7389085

Claim:
An image forming apparatus comprising: a recording material feeding portion for feeding a recording material; an image forming portion for forming an image on the recording material fed by said recording material feeding portion; a discharging portion for discharging the recording material on which an image is formed by said image forming portion; a reverse conveying portion for reversing the front surface and the rear surface of the recording material on which an image is formed by said image forming apparatus, including a first conveying roller pair capable of forward and reversely rotating, a second conveying roller pair placed downstream from said first conveying roller pair, and separation means for mutually separating the second conveying roller pair; a double surface conveying portion for conveying again to said image forming means the recording material having an image formed on one surface and having its front surface and rear surface reversed by said reverse conveying portion for forming images on both surfaces of the recording material; and a control portion for controlling the driving of said first and second conveying roller pairs and the operation of said separation means, wherein if images are formed on both surfaces of the recording material, the recording material is reversed by switching said first conveying roller pair from forward driving to reverse driving and conveyed to said double surface conveying portion, and when the recording material is conveyed to said double surface conveying portion, said control means performs control so that said second conveying roller pair is forward driven to convey the recording material conveyed by said first conveying roller pair driven forward, and the driving of said second conveying roller pair is stopped and said second conveying roller pair is separated at the time when said first conveying roller pair is switched from forward driving to reverse driving.