Fixing device and image forming apparatus

Details Fixing device and image forming apparatus Fixing device and image forming apparatus

2008-03-25

2008-03-25

Grainger, Quana M (Department: 2852)

Electrophotography

Image formation

Fixing

C399S334000, C219S619000

Reexamination Certificate

active

11375978

ABSTRACT:
An image forming unit of a copier is provided with an image fixing unit (fixing device) adopting an induction heating method. A heating roller of this image fixing unit includes a heat producing layer made of a temperature-sensitive magnetic material whose permeability changes with temperature, and a supporting layer disposed adjacent to the heat producing layer and made of a nonmagnetic and electrically conductive material. The heat producing layer has a width substantially equal to a passing area (about 294 mm) for sheets along a direction of an axis of rotation of the heating roller and smaller than a width (about 310 mm) of an induction heating coil.

REFERENCES:
patent: 6605802 (2003-08-01), Nagahira
patent: 7158748 (2007-01-01), Kwak et al.
patent: 2002/0020699 (2002-02-01), Nagahira
patent: 2004/0105708 (2004-06-01), Imai et al.
patent: 2004-151470 (2004-05-01), None

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