Patent ID: 7609984

Claim:
A fixing device comprising: a pair of rotating bodies which conveys a recording medium between a nip at which said rotating bodies are pressed against each other; a heating unit which heats at least one of said rotating bodies; a temperature detection unit which detects a temperature of at least one of said rotating bodies; a storage unit in which a temperature change is stored, the temperature change representing the change in temperature of the at least one of said rotating bodies in the case where an image forming apparatus is operating normally when the imaging forming apparatus is restarted after the occurrence of a jam; a judgment unit which judges that the image forming apparatus is in an abnormal state when said temperature detection unit detects a temperature change different from the temperature change in the case of said normal operation; and a temperature control unit which stops passage of current through said heating unit when said judgment unit judges that the image forming apparatus is in the abnormal state.