CPC G03G 15/2028 (2013.01) [G03G 15/2064 (2013.01); G03G 2215/2038 (2013.01)] | 7 Claims |
1. An image forming apparatus comprising:
a fixing belt that is rotatable and endless;
a heating roller configured to make contact with an inner peripheral surface of the fixing belt and apply heat to the fixing belt;
a steering roller configured to make contact with the inner peripheral surface of the fixing belt along with the heating roller;
a pressure rotation member configured to press the fixing belt, wherein the pressure rotation member and the fixing belt are configured to form a nip portion and sandwich and convey a recording material, bearing unfixed toner, to the nip portion to fix an unfixed toner image to the recording material;
a contact-separation mechanism configured to move the pressure rotation member to a position where the pressure rotation member is in a contact state with the fixing belt and a position where the pressure rotation member is in a separated state from the fixing belt;
a belt position detection unit configured to detect a position of the fixing belt in a width direction of the fixing belt; and
a control unit configured to control swing of the steering roller such that the fixing belt is moved to a predetermined position in the width direction of the fixing belt based on a detection result of the belt position detection unit,
wherein, in continuously performing fixing on a plurality of recording materials, the control unit is configured to control the steering roller such that a distance between a center position of the fixing belt in the width direction of the fixing belt when an operation to tilt the steering roller is performed for a first time after the center position of the fixing belt is moved away from a center position of a moving range of the fixing belt and the center position of the moving range of the fixing belt is smaller in a period after a last but one recording material before the pressure rotation member enters the separated state passes through the nip portion than in a period before the recording material passes through the nip portion.
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