Patent ID: 8391738

Claim:
An image heating apparatus comprising: first image heating means, having a nip through which a recording material passes, for heating a toner image on the recording material; second image heating means, having a nip through which the recording material passes, for heating the toner image on the recording material having passed through the nip of said first image heating means; speed changing means for changing a feeding speed of the recording material of said second image heating means; a first detector configured to detect an amount of slack of the recording material at one end of the recording material when the recording material is nipped by both of the nip of said first image heating means and the nip of said second image heating means; a second detector configured to detect an amount of slack of the recording material at the other end of the recording material when the recording material is nipped by both of the nip of said first image heating means and the nip of said second image heating means; adjusting means for adjusting the difference between the amount of slack at said one end of the recording material and the amount of slack at the other end of the recording material; and an executing portion configured to execute a correction mode when the amount of slack at said one end of the recording material detected by said first detector and the amount of slack at the other end of the recording material detected by said second detector are different from each other, wherein said executing portion executes the correction mode in which after said adjusting means reduces the difference between the amount of slack at the one end of the recording material and the amount of slack at the other end of the recording material by changing the position of said second image heating means at the other end of the recording material while fixing the position of said second image heating means at the one end of the recording material, the feeding speed of the recording material is controlled by said speed changing means.