| 摘要 |
PURPOSE: A fuser of an image forming device is provided to equalize a surface temperature of a heating roller and maintain the surface temperature regularly or within a predetermined range. CONSTITUTION: A heating roller(262) fuses an image transferred to a sheet of printing paper by heat. The heating roller is formed of a closed tube type heat pipe. The closed tube type heat pipe is formed of an external conductor(262a), a closed type space(262b), and an inner conductor(262c). An operation fluid is injected into the closed type space. An induction heating coil(264) is installed inside the heating roller as a heating member. An eddy current is generated on a surface of the inner conductor of the heating roller by an alternating current magnetic field generated by the induction heating coil, so Joule's heat is generated by eddy current loss generated on the surface of the inner conductor of the heating roller.
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