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US 2003/0228178 A1Published application
Fixing apparatus
AssigneeKABUSHIKI KAISHA TOSHIBA and TOSHIBA TEC KABUSHIKI KAISHA
InventorKazushige Morihara
Life of this patent
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Abstract
A fixing apparatus comprising a heating roller, a coil provided in the heating roller and configured to generate a high-frequency magnetic field, and capacitors and that constitute a resonant circuit, jointly with the coil. The resonant circuit is excited, sequentially (or alternately) at a plurality of frequencies which are nearly equal to the resonance frequency of the resonant circuit.
Claims13
A fixing apparatus comprising:
- a heating roller;
- at least one coil provided in the heating roller and configured to generate a high-frequency magnetic field;
- at least one capacitor which constitutes a resonant circuit, jointly with the coil;
- and
- a control unit which excites the resonant circuit, sequentially at a plurality of frequencies which are nearly equal to a resonance frequency of the resonant circuit.
2 more elements
A fixing apparatus comprising:
- a heating roller;
- a plurality of coils provided in the heating roller, each configured to generate a high-frequency magnetic field;
- a plurality of capacitors, each of which constitutes a resonant circuit, jointly with one coil;
- and
- a control unit which excites the resonant circuits, each sequentially at a plurality of excitation frequencies which are nearly equal to a resonance frequency of the resonant circuit.
2 more elements
A fixing apparatus comprising:
- a heating roller;
- a plurality of coils provided in the heating roller, each configured to generate high-frequency magnetic fields;
- a plurality of capacitors, each of which constitutes a resonant circuit, jointly with one coil;
- and
- control means for exciting the resonant circuits, each sequentially at a plurality of excitation frequencies which are nearly equal to a resonance frequency of the resonant circuit.
2 more elements
Dependencies are inferred from the claim text.