Abstract: It is desirable if the lengthwise center axis of a cylindrical rotating member such as a photoreceptor drum is aligned exactly with the center axes of the support shafts. However, as it is impossible to eliminate manufacturing errors in components, it is unavoidable for there to be a slight angle of intersection between the center axis of the cylindrical rotating member and the center axes of the support shaft. Consequently, the object of the present invention is to provide a support mechanism for the cylindrical rotating member whereby the cylindrical rotating member exhibits little unevenness of rotation. When lengthwise axis of the cylindrical rotating member forms angle of intersection .alpha. with lengthwise axis of shaft, this angle .alpha.

Abstract: The purpose of the present invention is to provide a conductive contact material, the contents of which do not generate soil on a charged body not only during initial use but also after repeated use. A conductive contact material consists of thermoset urethane material containing an antioxidant within a range from 0.1 to 0.3% by weight, and an inorganic ion electrically conducting agent with in a range form 0.01 to 2.00% by weight. After ozone exposure or the like, molecule chain scission of the base material and antioxidant leads generation of active monomers and origomers. However, the conductive contact material containing the above specified proportion of an antioxidant and an inorganic ion electrically conducting agent prevents generation of active monomers and origomers which are soiling source for a charged body. The conductive contact material also prevents antioxidant itself from being a soiling source.

Abstract: A thermal fixing device having a heating roller and a pressing member for thermally fixing a toner image held on the front side of the recording sheet. The heating roller is provided to confront the toner image of the recording sheet and the pressing member is provided to confront the back side of the sheet for making pressure contact with said heating roller through the sheet when the recording sheet is transported between the heating roller and the pressing member. The heating roller and the pressing member respectively include heat-resistant elastic layers the surface of which have the triboelectricity to the recording sheet. The heat-resistant elastic layer of the pressing member has higher triboelectricity to the recording sheet than the heat-resistant elastic layer of the heating roller.