| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt feeding device which can stabilize and feed an endless belt while suppressing the deterioration of the endless belt, and to provide an image heating device. SOLUTION: In the structure having belt offset detecting sensors 65 and 66 at the respective widthwise ends of the endless rotating belts 27 and 32, the displacement amount of each of steering roller 26 and 34 for correcting the belt offset is changed at the time of detection, and thereafter, it is returned, in such a case, the displacement amount is returned to the reference value after the time which is supposed to be enough for the belt to return to the center position as counted from the passing of the belt end by the sensor at the innermost circumference elapses. Further, in the case of calculating the time required to return to the center position, the rotational speed of the belt and the displacement amount of the end part of the steering roller are regarded as coefficient, therefore, the belt is stably kept in a normal zone without being affected by various operating conditions. COPYRIGHT: (C)2008,JPO&INPIT
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