| 摘要 |
PURPOSE:To perform excellent heating with little electric power and attain uniform fixation by using a heat shielding material for the driving means of a heat roller, and making the heat distribution of a heater for high electric power large in the center part. CONSTITUTION:The heating roller 1 uses heat-resisting sleeves 11 and 11' and heat-resisting gears 14 and 14', and radiation of heat from roller ends is prevented. Further, two heaters 31 and 32 are arranged in the heating roller 1, and the heat generation distribution of the heater 31 for high electric power is large at the roller center part and smaller at the end parts than at the center part. Thus, the heating roller 1 is placed in a thermally floating state and the heating value of the center part is increased to perform excellent heating with little electric power in various copy modes and also attain excellent fixation. |
