| 摘要 |
PURPOSE:To enable melt fixation of a toner image without causing any offset phenomenon, even when a toner contg. silicone oil is used, by coating the outer circumference of at least one of heating and pressing rollers with a coating layer of stretched porous polytetrafluoroethylene. CONSTITUTION:The pressing roller 16 is formed by coating the outer circumference of a metallic cylindrical main body 17 with an elastic material layer 18 made of comparatively thick silicone rubber or the like. The outer circumferences of the roller 16 and a heating roller 10 coated each with an EPTFE layer contain a large number of microholes, and even when a toner contg. silicone oil is used, said layer holds said oil in a state of the holes impregnated with the oils. The heating roller 10 can be furnished with electric conductivity by coating the outer layer of said roller with a conductive EPTFE layer contg. a good conductivity filler. |
