Patent ID: 7616920

Claim:
A toner image heating apparatus comprising: a rotary member and an endless belt configured and positioned to heat a toner image on a sheet at a nip portion therebetween; a supporting roller configured and positioned to support said endless belt; a detector configured and positioned to detect that said endless belt is beyond a predetermined zone in a width direction of said endless belt; a displacing device configured and positioned to displace a longitudinal end of said supporting roller based on an output of said detector so that said endless belt is within the predetermined zone in the width direction; a moving device configured and positioned to move said endless belt to an image heating position where an image heating process is executable; and a controlling device configured and positioned to control a displaced amount of the longitudinal end of said supporting roller by said displacing device so that the displaced amount is smaller when a sheet with a small surface sliding resistance is at the nip portion than when a sheet with a large surface sliding resistance is at the nip portion.