| 摘要 |
PROBLEM TO BE SOLVED: To stop or restrict the operation of a fixing device by immediately detecting the abnormal temperature of a fixing roller without depending on the temperature of the fixing roller. SOLUTION: The fixing device includes: a magnetic flux generating means that generates a magnetic flux by supplying power; a power supply means that supplies power to the magnetic flux generating means; an induction heat generating body that generates electromagnetic induction heat by the action of the magnetic flux generated by the magnetic flux generating means; a temperature detecting means that detects the temperature of the induction heat generating body; and a control means that, based upon the temperature detected by the temperature detecting means, controls an amount of power supplied by the power supply means . The fixing device fixes toner to a transfer medium with the heat generated by the induction heat generating means. The temperature detecting means has a first temperature detecting means that detects the temperature of the internal face of the induction heat generating body, and a second temperature detecting means that detects the the temperature of the external face of the induction heat generating body. Based upon the temperature information obtained by the first and second temperature detecting means, the control meas detects an abnormal state. COPYRIGHT: (C)2005,JPO&NCIPI
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