| 摘要 |
PROBLEM TO BE SOLVED: To suppress over temperature increase in a recording material non-conveyance region, by making dissolution of heat insufficiency and suppression of abnormal temperature increase compatible, in an end region of the longitudinal direction of a heating element. SOLUTION: This image heating device includes a heating element 11, a heating rotating body 13 that has at least a base layer 131 and an elastic layer 132 disposed on the outer periphery of the base layer and rotates in a contact state with the heating element, and a pressurizing member 20 that comes into contact with the heating rotating body and forms a nip section N. The image heating device heats an image, while gripping and conveying a recording material P for carrying the image T with the nip section. In the heating rotating body, the thermal conductivityλe of the thickness direction between the inner surface and the outer surface of a recording material non-conveying region Wa is larger than the thermal conductivityλc in the thickness direction between the inner surface and the outer surface of a recording material conveying region Wb of the longitudinal direction orthogonal to the recording material conveying direction. The pressurizing member is in contact with the recording material conveying region and the recording material non-conveying region of the heating rotating body. COPYRIGHT: (C)2010,JPO&INPIT
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