Induction heating device and image forming apparatus...

Details Induction heating device and image forming apparatus... Induction heating device and image forming apparatus...

2011-01-11

2011-01-11

Van, Quang T (Department: 3742)

Electric heating

Inductive heating

With heat exchange

C399S328000, C399S333000

Reexamination Certificate

active

07868272

ABSTRACT:
In an external heating type induction heating device in which a magnetic field producing means is arranged in the outer circumferential portion of a heating roller1, two heat generating layers, namely a conductive shaft1aand a surface heat generating layer1c, are provided in the heating roller1, and the surface heat generating layer1cis formed having a thickness through which passes a portion of an alternating magnetic field, and the conductive shaft1aat a center of the heating roller1is heated by a portion of the alternating magnetic field produced by the magnetic field producing means passing through the surface heat generating layer1cto link to the conductive shaft1apresent at the center of the roller, thereby preventing a drop in a surface temperature of the heating roller1.

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