Fixing device having an induction heating control member

Details Fixing device having an induction heating control member Fixing device having an induction heating control member

2007-04-02

2010-11-02

Royer, William J (Department: 2852)

Electrophotography

Image formation

Fixing

C399S334000

Reexamination Certificate

active

07826785

ABSTRACT:
In an induction heating fixing device according to the invention, a first induction heating coil that generates an induced current across the total length of a heat roller is provided on the outer circumference of the heat roller having a metal conductive layer. A second induction heating coil that generates an induced current at a central part of the heat roller is provided, which crosses the first induction heating coil and is arranged on the outer side than the first induction heating coil. With the first induction heating coil, the heat roller is heated across the total length without generating any uneven temperature. On-off control of the first induction heating coil and the second induction heating coil is carried out, and the temperature distribution in the longitudinal direction of the heat roller is kept constant irrespective of the size of a sheet of paper P.

REFERENCES:
patent: 7016622 (2006-03-01), Kinouchi et al.
patent: 7020426 (2006-03-01), Takagi et al.
patent: 7045749 (2006-05-01), Kinouchi et al.
patent: 7184697 (2007-02-01), Kinouchi et al.
patent: 7215919 (2007-05-01), Kinouchi et al.
patent: 7580649 (2009-08-01), Takagi et al.
patent: 09-106207 (1997-04-01), None
patent: 2001-185338 (2001-07-01), None
patent: 2005-093352 (2005-04-01), None

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