Fixing device for image forming apparatus and fixing method

A fixing device for an image forming apparatus according to the present invention is configured in such a manner that both end portions of a form rubber layer are formed so as to be thicker than a center portion thereof for absorbing expansion of the foam rubber layer by a space between the foam rub...

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Bibliographic Details
Main Author TSUEDA YOSHINORI,KINOUCHI SATOSHI,TAKAGI OSAMU,SONE TOSHIHIRO
Format Patent
LanguageEnglish
Published 24.10.2007
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:A fixing device for an image forming apparatus according to the present invention is configured in such a manner that both end portions of a form rubber layer are formed so as to be thicker than a center portion thereof for absorbing expansion of the foam rubber layer by a space between the foam rubber layer and a metal conductive layer. Accordingly, the hardness of a heat roller at the time of fixation becomes substantially uniform over the entire length thereof in the longitudinal direction. A pressure roller is out of contact with the heat roller until warming up is completed, and the pressure roller is brought into pressure contact with the heat roller after the heat roller has reached a warming up complete temperature, so that a load applied to both end portions of the heat roller is alleviated.
Bibliography:Application Number: CN200710098174