Image forming apparatus and fixing device therefor

Details Image forming apparatus and fixing device therefor Image forming apparatus and fixing device therefor

2005-05-24

2005-05-24

Pelham, Joseph (Department: 3742)

Electric heating

Heating devices

Combined with diverse-type art device

C399S331000, C399S333000

Reexamination Certificate

active

06897409

ABSTRACT:
A fixing device for forming a toner image formed on a recording medium includes a heat roller accommodating a halogen heater. The halogen 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 using the fixing device is also disclosed.

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