Electric heating – Inductive heating – With heat exchange
Reexamination Certificate
2005-03-01
2005-03-01
Leung, Philip H. (Department: 3742)
Electric heating
Inductive heating
With heat exchange
C219S661000, C219S666000, C219S668000, C399S328000, C399S330000
Reexamination Certificate
active
06861626
ABSTRACT:
An induction heating roller device that keeps leakage current within specifications and prevents the occurrence of erroneous operations caused by common mode noise. The induction heating roller device includes an induction coil, a grounded heating roller magnetically coupled to the induction coil and heated by electro-magnetic induction. A power factor improving capacitor is connected in parallel to and near the induction coil and has a grounded intermediate point. A high-frequency power source biases the induction coil. The leakage current produced by distributed capacitance between the induction coil and the heating roller is returned to the high-frequency power source via the power factor improving capacitor. Thus, the leakage current does not flow out of the induction heating roller device.
REFERENCES:
patent: 6359269 (2002-03-01), Hayasaki et al.
patent: 6438335 (2002-08-01), Kinouchi et al.
patent: 6573485 (2003-06-01), Yokozeki
patent: 2002-222688 (2002-09-01), None
Doi Hiroyuki
Kika Manabu
Maeda Syouhei
Ogasawara Takayuki
Suzuki Toshiya
Harison Toshiba Lighting Corp.
Jenkens & Gilchrist PC
Leung Philip H.
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