Patent ID: 7251427

Claim:
An image forming apparatus, comprising: an image forming part for forming an unfixed toner image on a recording material; a fixing part including a first rotary member and a second rotary member that are in contact with each other to form a nip and a heating member for heating said first rotary member in a heating position different from the nip, and for fixing an unfixed image formed on a recording material to the recording material in the nip using heat of said first rotary member, said heating member including a film and heating a surface of said first rotary member through said film; a temperature detector for detecting temperature of said film of said heating member at an upstream side of a heating portion of said film; and a power control part for controlling power to be supplied to said heating member so as to increase an amount of heat supplied to said first rotary member substantially at a timing when a portion of said first rotary member contacts a leading edge of the recording material in the nip reaches the heating position based on the temperature detected by said temperature detector.