Patent ID: 8503894

Claim:
A fixing apparatus comprising: a pair of rotating bodies that transports a recording medium on which an image is formed by using an image forming material, by sandwiching the recording medium; a heating section that heats at least one of the pair of rotating bodies; a moving section that moves the pair of rotating bodies between a position at which they mutually contact and a position at which they are mutually separated; a temperature detecting section that detects a surface temperature of at least one of the pair of rotating bodies without contacting the rotating bodies; and a twine generation determining section that determines whether the recording medium has twined around either of a pair of rotating bodies based on the surface temperature detected by the temperature detecting section, wherein the twine generation determining section determines whether the recording medium has twined around either of a pair of rotating bodies, based on a predetermined period during which the pair of rotating bodies come into mutual contact, or one or more periods other than the predetermined periodn wherein the twine generation determining section suspends the determination by the twine generation determining section for the predetermined period, or suspends output of a result of determination by the twine generation determining section for the predetermined period.