| 摘要 |
PROBLEM TO BE SOLVED: To always guide a recorded material in a good state by forming a guide member for guiding the recorded material to a heating nip portion formed by pressure contact of first and second members with several kings of materials with various linear expansion coefficients, and changing a position for guiding the material with thermal deformation according to atmospheric temperature. SOLUTION: In an electronic photographic image forming device (a laser beam printer), a transfer material P on which a toner image on a sensitive drum is transferred is guided to a fixing means 1 through a prefixing guide 2, and a transfer toner image is fixed. The prefixing guide 2 is formed by forming a conveying surface side member 2a made of a material with small thermal expansion and an inner surface side member 2b made of a material with large expansion in a two-color molding method. Thus, heat of a rotator 4 heated during the fixing is conduced, the prefixing guide 2 is also thermally deformed according to the change of the outer diameter of a pressurizing roller 5 due to thermal expansion, deviation between a position for delivering the transfer material and the height of the prefixing guide 2 is corrected, and the transfer material P can be always guided to a suitable position.
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