Patent ID: 6856783
Filing Date: 2005-02-15
Classification: G03G

Abstract:
1. 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.