Image heating device and image forming device using the same

Details Image heating device and image forming device using the same Image heating device and image forming device using the same

1999-05-11

2000-02-01

Brase, Sandra

Electrophotography

Image formation

Fixing

399329, 399330, 399335, G03G 1520

Patent

active

060213035

ABSTRACT:
An image heating device comprises a cylindrical heating roller with a Curie temperature of 210.degree. C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carries a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than 1/2. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.

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