| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic induction heating type fixing device that achieves compatibility of suppression of deterioration in the image quality and suppression of excessive increase in the temperature of a fixing roller, coping with papers of various paper widths. SOLUTION: The fixing device winds an excitation coil 31 along the fixing roller 1. A first demagnetization coil 34 on the excitation coil 31 and a second demagnetization coil 35 on the first demagnetization coil 34 are arranged, while being stacked, respectively, and further, the first demagnetization coil 34 and the second demagnetization coil 35 have axial different outer shape size of the fixing roller 1, respectively. In addition, the opening width of the circumferential direction of the fixing roller 1 of the second demagnetization coil 35 is wider than the opening width of the first demagnetization coil 34. COPYRIGHT: (C)2008,JPO&INPIT
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