Patent ID: 7421220

Claim:
An image forming apparatus comprising: an image forming device which forms a toner image on a recording material, said image forming device being capable of executing an image forming job in which toner images are formed on a common type of recording materials, continuously; a heating member which heats the toner image formed on the recording material by said image forming device at a nip portion; an endless belt which forms said nip portion with said heating member; a separating device which separates said heating member and said belt from each other; a detector which detects a temperature of said belt; and a controller which effects interrupting the image forming job and executes a separating operation of said separating device when the temperature of said belt detected by said detector is increased to a predetermined temperatures, respectively defined for a type of the recording material used in the image forming job, wherein the predetermined temperature defined for a resin coated paper is lower than the predetermined temperature defined for a plain paper.