To prevent the abnormal temperature rise of a toner heating medium heated by the electromagnetic induction of an induction heating means.
This fixing device is provided with a heating roller 1 heated by the electromagnetic induction of the induction heating means, a fixing roller arranged in parallel with the roller 1, a heat-resistant belt 3 stretched and laid over the roller 1 and the fixing roller, heated by the roller 1 and rotated by the rollers, a pressure roller made to press-contact with the fixing roller through the belt 3, rotating in a forward direction with respect to the belt 3 and forming a fixing nip part, a switching element 16 applying a current to an exciting coil 7, a switching element driving means 17 driving the element 16, and a temperature sensitive operation member 12 connected to the power source line of the driving means 17 in series and stopping power supply to the driving means 17 when the sensed temperature becomes equal to or above the specified one.
JP2017102202 | POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS |
JP2004109940 | TONER AND IMAGE FORMING METHOD USING THE SAME |
SEII MASAHIRO
MATSUO KAZUNORI
JP2000223253A | 2000-08-11 | |||
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JPH09160406A | 1997-06-20 | |||
JPS59156008A | 1984-09-05 | |||
JPH05183436A | 1993-07-23 | |||
JPH09102385A | 1997-04-15 | |||
JPH10301442A | 1998-11-13 |