Patent ID: 7702249

Claim:
An image forming apparatus comprising: an image forming section for forming a toner image on a recording material; a fixing section for fixing the toner image formed on the recording material, said fixing section including an endless belt, a heater contacting an inner peripheral surface of said endless belt, a pressure member for forming a nip portion with said heater through said endless belt, the pressure member not having a heat source therein and a temperature detector for detecting the temperature of the heating member; and power control means for controlling an electrical power supply to the heater so that the temperature detected by the temperature detector is maintained at a target temperature, wherein the recording material bearing the toner image is heated while being pinched and conveyed at the nip portion, wherein the power control means has a no-curl reduction mode and a curl reduction mode for reducing curl of a fixed recording material, wherein once the no-curl reduction mode is set, the target temperature during an interval between a preceding recording material and a trailing recording material in a fixing processing in which plural recording materials are continuously processed is set at a temperature equal to or less than a target temperature in the fixing processing, wherein once the curl reduction mode is set, the target temperature during an interval between a preceding recording material and a trailing recording material in a fixing processing in which plural recording materials are continuously processed is set at a temperature higher than a target temperature in the fixing processing, and wherein the interval in the curl reduction mode is longer than the interval in the no-curl reduction mode.