Patent ID: 7398048

Claim:
An image forming apparatus comprising: an image forming unit that forms an image on a sheet; a driving roller that is provided on a downstream side of the image forming unit and rotates in forward and reverse directions; a first driven roller that is driven to rotate and forms a first nip portion in cooperation with the driving roller; a second driven roller that is driven to rotate and forms a second nip portion in cooperation with the driving roller, the second driven roller being provided on a downstream side of the first nip portion; a first transfer passage into which the sheet passed through the first nip portion and sent from the second nip portion is transferred by a forward rotation of the driving roller; a second transfer passage into which the sheet passed through the first nip portion is transferred by the forward rotation of the driving roller without passing through the second nip portion; and a third transfer passage into which the sheet passed through the first nip portion and nipped at the second nip portion is transferred by a reverse rotation of the driving roller after a rear end of the sheet has passed through the first nip portion by the forward rotation of the driving roller.