| 摘要 |
PROBLEM TO BE SOLVED: To minimize excessive temperature rise of paper non-passage areas of a fixing rotor and pressure rotor without scratching or soiling the surfaces of the fixing rotor or pressure rotor in a fixing device that fixes a toner image onto paper by passing the paper through a nip between the fixing rotor and pressure rotor. SOLUTION: The fixing device includes: a fixing roller 11 incorporating a halogen heater H; a pressure belt 13 disposed in firm contact with the fixing roller 11; and a pressing member 12A that presses the pressure belt 13 against the fixing roller 11 from its internal circumference. An elastic layer 122 with low heat conductivity is formed along a half of the circumference of the surface of the metal core 121 of the pressing member 12A and over the entire length in the axial direction. The elastic layer 122 with low heat conductivity and an elastic layer 123 with high heat conductivity are formed respectively in the middle and each end of the other half of the circumference of the surface of the metal core 121 in its axial direction. The pressing member 12A is rotated according to a paper size, and paper passage areas and the paper non-passage areas are pressed by the elastic layers 122 and 123 respectively. COPYRIGHT: (C)2009,JPO&INPIT
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