Fixing apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorKazuhiko Kikuchi
Life of this patent
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Abstract
The fixing apparatus includes an induction heating device provided inside the fixing roller, configured to heat the fixing roller by induction heating, and the induction heating device further includes a core member and an excitation coil wound around the core member, and where the inner diameter of the heat roller is represented by D, the width of the portion of the core member, which opposes at least the heat roller is represented by B, the inductance of the excitation coil is L[μH] and the resistance of the heat roller is R[Ω], B is set to be larger than L/R×0.3 and less than D/3.
Claims5
A fixing apparatus comprising:
- a fixing device including a fixing roller and a press roller set in contact with the fixing roller, configured to heat and press a to-be-fixed material by making the material pass between the fixing roller and press roller;
- and
- an induction heating device provided inside the fixing roller, configured to heat the fixing roller by induction heating,
- wherein
- the induction heating device includes a core member and an excitation coil wound around the core member, and
- the apparatus satisfies a relationship represented by L/R×0.3≦B×D/3,
- where D represents an inner diameter of the heat roller, L[μH] represents an inductance of the excitation coil, R[Ω] represents a resistance of the heat roller, and B represents a width of a portion of the core member, which opposes at least the heat roller.
A fixing apparatus comprising:
- a fixing device including a fixing roller and a press roller set in contact with the fixing roller, configured to heat and press a to-be-fixed material by making the material pass between the fixing roller and press roller;
- and
- an induction heating device provided inside the fixing roller, configured to heat the fixing roller by induction heating,
- wherein
- the induction heating device includes a core member and an excitation coil wound around the core member,
- the apparatus satisfies a relationship represented by L/R×0.3≦B≦D/3,
- where D represents an inner diameter of the heat roller, L[μH] represents an inductance of the excitation coil, R[Ω] represents a resistance of the heat roller, and B represents a width of a portion of the core member, which opposes at least the heat roller, and
- a drive circuit configured to supply a direct current voltage is connected to the excitation coil via a switching circuit.
Dependencies are inferred from the claim text.