Patent ID: 8824954

Claim:
An image forming apparatus comprising: an image forming unit configured to form a toner image on a sheet; a fixing unit configured to fix the toner image on the sheet; a curl correcting unit configured to correct a curl of the sheet that has passed through the fixing unit and to vary a curl correcting amount for correcting the curl of the sheet; a control unit configured to control the curl correcting amount by the curl correcting unit to start changing the curl correcting amount from a first curl correcting amount for correcting a curl of a preceding sheet to a second curl correcting amount for correcting a curl of a succeeding sheet that follows the preceding sheet before an upstream end in the sheet conveying direction of the preceding sheet passes through the curl correcting unit, to finish changing the curl correcting amount before the succeeding sheet reaches the curl correcting unit, and to set the curl correcting amount a the second curl correcting amount when a downstream end in the sheet conveying direction of the succeeding sheet passes through the curl correcting unit.