Image fixing apparatus and image fixing roller having a shortene

Details Image fixing apparatus and image fixing roller having a shortene Image fixing apparatus and image fixing roller having a shortene

1998-04-17

1999-11-16

Moses, Richard

Electrophotography

Image formation

Fixing

399331, 399332, 399333, 399334, 399335, G03G 1520

Patent

active

059872950

ABSTRACT:
An image fixing apparatus for thermally fixing images on an image receiving material at a predetermined image fixing temperature, comprising an image fixing device comprising a core member, and an exothermic phase transition layer provided on said core member, comprising an exothermic phase transition material which is capable of performing reversible phase transition from an amorphous solid state to a crystalline state with liberation of crystallization heat therefrom, and vice versa, and has a melting point higher than said predetermined image fixing temperature, a heating device which maintains the temperature of at least an outer surface of said image fixing device at said predetermined image fixing temperature, a first phase transition device which heats said exothermic phase transition layer, thereby having said exothermic phase transition material perform phase transition from said amorphous state to said crystalline state for liberation of crystallization heat therefrom, a second phase transition device which has said exothermic phase transition material perform phase transition from said crystalline state to said amorphous solid state and a pressure application device which rotates in pressure contact with the outer surface of said image fixing device with the application of a predetermined pressure thereto.

REFERENCES:
patent: 5740513 (1998-04-01), Matsuo et al.
patent: 5773793 (1998-06-01), Matsuo
patent: 5804794 (1998-09-01), Matsuo et al.

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