FUSING ROLLER OF DEVICE FOR FORMING ELECTROPHOTOGRAPH IMAGE

摘要

PURPOSE: A fusing roller of a device for forming an electrophotograph image is provided to uniform a surface temperature of the fusing roller and reduce overshoot of initial heating. CONSTITUTION: A tubular inner tube(214) of which both ends are sealed, maintains a vacuum state and contains a predetermined amount of operating fluid inside. A fusing(212) part is installed to cover the inner tube. A heating part(213) is composed of a resistance heating coil installed between the fusing part and the inner tube for generating heat. Coil pitches at both ends of the heating part gradually become narrow as a coil goes to both ends of a fusing roller.