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    • 51. 发明授权
    • Image forming apparatus and fixing device therefor
    • 图像形成装置及其固定装置
    • US06646227B2
    • 2003-11-11
    • US10132522
    • 2002-04-26
    • Jun YuraTakashi FujitaHirokazu IkenoueAtsushi Nakafuji
    • Jun YuraTakashi FujitaHirokazu IkenoueAtsushi Nakafuji
    • G03G1520
    • G03G15/2053
    • A fixing device for forming a toner image formed on a recording medium includes a heat roller accommodating a radiation heater. The radiation heater includes a glass tube formed of transparent quartz and provided with a wall thickness of 0.8 mm or below to increase transmission thereof. The increased transmission reduces a heat loss ascribable to the glass tube at the time of warm-up of the fixing device. The heat roller has such a thermal capacity that it can be warmed up in 10 seconds or less. The glass tube is filled with inactive gas whose major component is krypton or xenon. A tungsten filament accommodated in the glass tube has its diameter reduced in order to implement a color temperature of 2,500 K or above. An image forming apparatus uses the fixing device.
    • 用于形成在记录介质上形成的调色剂图像的定影装置包括容纳辐射加热器的加热辊。 辐射加热器包括由透明石英形成并且具有0.8mm或更小的壁厚以增加其透射率的玻璃管。 增加的传输减少了在定影装置预热时归因于玻璃管的热损失。 加热辊具有这样的热容量,可以在10秒以内加热。 玻璃管填充有主要成分是氪或氙的惰性气体。 容纳在玻璃管中的钨丝的直径减小,以实现2500K或更高的色温。 图像形成装置使用定影装置。