Patent ID: 7697884

Claim:
An image forming apparatus, comprising: a first conveyance path through which a sheet having passed through a fixing part passes, the fixing part for fixing a toner image to the sheet; a second conveyance path branched from said first conveyance path; a third conveyance path through which a sheet having passed through said second conveyance path passes to the first conveyance path in a condition where a surface of the sheet is reversed; a first curl forming part configured to curl the sheet, said first curl forming part being provided in said third conveyance path; and a second curl forming part configured to curl the sheet in a direction opposite to a direction in which the sheet is curled in the first curl forming part, said second curl forming part being provided downstream of a confluent part of said third conveyance path and said first conveyance path, wherein a curling amount of the sheet in said second curl forming part is set to be smaller than a curling amount of the sheet in said first curl forming part, and the curling amount of the sheet in said second curl forming part is variable according to rigidity of the sheet.