Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2007-12-04
2007-12-04
Tran, Hoan (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C219S619000, C399S328000
Reexamination Certificate
active
11080909
ABSTRACT:
A fixing device of an image forming apparatus of the present invention enables induction heating coils for a 100 V power source to set a ratio of inductance L to load resistance R of a heat roller to L/R <35×10−6(H/Ω) and coil impedance Z (Ω) to Z<10 (Ω) and supplies a drive current at a high frequency of 40 to 70 kHz. By doing this, an eddy current generated in the heat roller is concentrated upon a metallic conductive layer by the skin effect and the heat generation efficiency of the heat roller is improved.
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Kinouchi Satoshi
Sone Toshihiro
Takagi Osamu
Tsueda Yoshinori
Foley & Lardner LLP
Toshiba Tec Kabushiki Kaisha
Tran Hoan
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