发明名称 |
Image forming apparatus and fixing device therefor |
摘要 |
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.
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申请公布号 |
US6646227(B2) |
申请公布日期 |
2003.11.11 |
申请号 |
US20020132522 |
申请日期 |
2002.04.26 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
YURA JUN;FUJITA TAKASHI;IKENOUE HIROKAZU;NAKAFUJI ATSUSHI |
分类号 |
G03G15/20;(IPC1-7):G03G15/20 |
主分类号 |
G03G15/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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