Patent ID: 9244403
Filing Date: 2016-01-26
CPC Classification: G03G

Claim Text:
1. A fixing device comprising: a heating member configured to heat a recording medium to fix an unfixed developer image transferred on the recording medium onto the recording medium; an endless heating belt that is wrapped around the heating member in a rotatable manner, in a circumferential direction of the endless heating belt, and configured to heat the recording medium; a rotating member around which the endless heating belt is wrapped and that is provided in a rotatable manner in a state where a first axial end of the rotating member is fixed; a position detecting unit configured to detect a position of the endless heating belt when the endless heating belt is periodically reciprocated back and forth in a first direction and a second direction, which are opposite to each other and extend parallel to an axial direction of the rotating member; and a controller configured to control a rotational movement angle by which a second axial end of the rotating member is rotationally moved about the first axial end of the rotating member in a direction intersecting the axial direction such that the second axial end is periodically reciprocated back and forth passing through the axial direction on the basis of the position of the endless heating belt detected by the position detecting unit when the endless heating belt is periodically reciprocated back and forth in the first direction and the second direction so that a difference between a first period in which the endless heating belt is reciprocated in the first direction and a second period in which the endless heating belt is reciprocated in the second direction is made smaller, wherein the controller is configured to control the rotational movement angle by which the second axial end of the rotating member is rotationally moved about the first axial end of the rotating member in the direction intersecting the axial direction so that the endless heating belt is configured to move in the first direction or the second direction based on the position detecting unit detecting that a center of the endless heating belt is positioned at a center of the rotating member in the axial direction of the rotating member.