Fixing device with induction heating unit

Details Fixing device with induction heating unit Fixing device with induction heating unit

1998-07-16

2000-07-11

Leung, Philip H.

Electric heating

Inductive heating

With heat exchange

219667, 219670, 399330, 399 67, 399 69, H05B 614, H05B 608, G03G 1520

Patent

active

060876417

ABSTRACT:
A fixing device is provided, which can maintain good fixing properties, irrespective of the kind of a material on which a developer image is to be fixed and a temperature condition of a pressure roller. In a rotary contact region between a heat supply medium and the pressure roller, pressure and heat are applied to the material, thereby fixing the developer image on the material. The heat supply medium includes a metallic body for induction heating, which is provided with a magnetic field to produce an eddy current. The heat supply medium contains a magnetic field generating unit. The magnetic field generating unit includes a core provided with a coil. The core is situated near the metallic body of the heat supply medium such that a distance between a position closest to the metallic body and an end portion of the core is less than a distance between magnetic force line guiding portions provided on the core. The coil is wound such that the coil is not closer to the metallic body than a region surrounded by the magnetic force line guiding portions in a direction of cross section of the core.

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patent: 6002909 (1999-12-01), Furuyama et al.

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