Electrophotographic printing machine

摘要

An electrophotographic printing machine is provided with a photoreceptor drum (1) including a transparent cylindrical base having a transparent electrically conductive layer (1b) and a photoconductive layer (1c) laminated in this order on a surface thereof and a dielectric belt (8) in contact with the photoconductive layer (1c). The photosensitive layer (1c) is exposed while voltage is being applied across an electrically conductive toner (T) and said transparent electrically conductive layer (1b), thereby forming a toner image on the photosensitive layer. After the toner image on the photosensitive layer is transferred to the dielectric belt (8) which temporarily carries the toner image, the copying material (P) is superimposed on the toner image, and heat and pressure are applied to the toner image respectively from a heater (10) and a pressurizing roller (12). Since the melted toner is transferred onto the copying material using the adherence of the transfer sheet without using electric Coulomb force, the efficiency in transferring the toner image to the copying material is not affected by the electric surface resistance of the copying material. An image can therefore be formed using the electrically conductive toner even on a copying material of low electric surface resistance such as a normal transfer sheet. <IMAGE>