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

2005-10-04

2005-10-04

Brase, Sandra L. (Department: 2852)

Electrophotography

Image formation

Fixing

C399S329000, C399S330000, C399S335000

Reissue Patent

active

RE038810

ABSTRACT:
An image heating device comprises a cylindrical heating roller with a Curie temperature of 210° 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 carriers 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 ½. 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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