Patent ID: 7421219

Claim:
An image forming apparatus, comprising: image forming means for forming a toner image on a recording material; an image heating member, which heats the toner image formed on the recording material in a nip portion; heating means for heating the image heating member; first detecting means for detecting a temperature of a first area, which can be brought into contact with a recording material, of the image heating member, when a set width of the recording material is a predetermined width; control means for controlling an electric power supply to the heating means in accordance with output of the first detecting means; second detecting means for detecting a temperature of a second area outside of the first area of the image heating member in a width direction, when the set width of the recording material is the predetermined width; cooling means for cooling the second area of the image heating member in accordance with output of the second detecting means; third detecting means for detecting a temperature of a third area on an end side in the width direction within an area, which can be brought into contact with the recording material, of the image heating member, when the set width of the recording material is the predetermined width; and stopping means for stopping the image heating operation in accordance with output of the third detecting means.