Patent ID: 7978994

Claim:
An image forming apparatus comprising: an image forming unit that forms an image on a recording medium; a fixing unit that fixes the image formed on the recording medium by the image forming unit by applying heat; a first detector unit that detects a length of the recording medium in a transport direction, the first detector unit being disposed upstream of the fixing unit in the transport direction; a second detector unit that detects the length of the recording medium in the transport direction, the second detector unit being disposed downstream of the fixing unit in the transport direction; a correspondence relation calculating unit that calculates a correspondence relation between results of detection by the first detector unit and the second detector unit; an image formation controller that controls the image forming unit, based on a result of calculation performed by the correspondence relation calculating unit; and a conditions controller that controls operating conditions of the fixing unit so that the fixing unit allows the recording medium to pass the fixing unit without applying heat at least once, when the correspondence relation calculating unit calculates a correspondence relation.