Patent ID: 8600286

Claim:
An image forming apparatus comprising; a transfer portion which transfers a toner image to a conveyed sheet; a fixing portion which fixes the toner image transferred by the transfer portion; a conveying portion disposed between the transfer portion and the fixing portion, the conveying portion includes a plurality of sheet conveying members arranged in parallel to a width direction intersecting with a sheet conveying direction, the sheet conveying members convey the sheet on sheet conveying surfaces of the sheet conveying members, to which the toner image is transferred by the transfer portion, to the fixing portion; the driving mechanism drives such that at least one of the plurality of sheet conveying members is projected in a direction perpendicular to the sheet conveying surface and a projecting amount of the at least one sheet conveying member is changed with respect to the other sheet conveying member to form the sheet into a concave curl shape or a convex curl shape in the width direction; and the controlling portion controls the driving mechanism such that the projecting amount of the sheet conveying member is changed to change a curl amount of the sheet based on a data of a state-setting table which is set according to sheet type, wherein the conveying portion conveys the sheet, which is formed in the concave curl shape or the convex curl shape, into the fixing portion.