| 摘要 |
PROBLEM TO BE SOLVED: To make nip widths formed by a heating roller and a pressure roller uniform at a center part and an end in axial direction. SOLUTION: As for the pressure roller 2, a diameter change part B whose diameter gets larger and larger is formed on the way to both ends C side from the center part A in the axial direction in a core bar 3 and the outside diameter of an entire body formed of an elastic member 4 is made nearly the same.
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