Electrophotographic apparatus and process for simultaneously transferring and fixing toner image onto transfer paper

An electrophotographic apparatus for copying an original image onto a transfer paper comprising:

• a photoreceptor comprising a metallic cylindrical support having thereon, an inhibiting layer, a photoconductive layer on the inhibiting layer, an electron trapping layer on the photoconductive layer, a photosensitive layer made of amorphous silicon on the electron trapping layer, and a surface protecting layer on the photosensitive layer;
• a heater for uniformly heating the photosensitive layer and the surface protecting layer of the photoreceptor to a constant temperature;
• a charging device for creating a charge on the photoreceptor;
• an exposing device for exposing a light passed through the original image to form an electrostatic latent image on the photoreceptor;
• a developing device for developing the electrostatic latent image with a developing agent to form a toner image on the photoreceptor;
• and
• a transferring/fixing device for simultaneously transferring and fixing the toner image onto the transfer paper by applying pressure of 100 kg weight/cm.sup.2 or more on the transfer paper while the transfer paper is laid over the toner image on the photoreceptor,
• wherein the transferring/fixing device includes a transferring part for pressing the transfer paper between the photoreceptor and said transferring part, and a cleaning mechanism for cleaning an outer surface of the transferring part.

An electrophotographic process using an electrophotographic apparatus including a photoreceptor, a heater, and a transferring part equipped with a cleaning mechanism, the photoreceptor comprising a metallic cylindrical support having thereon, an inhibiting layer, a photoconductive layer on the inhibiting layer, an electron trapping layer provided on the photoconductive layer, a photosensitive layer made of amorphous silicon on the electron trapping layer, and a surface protecting layer on the photosensitive layer, said process comprising the steps of:

• uniformly heating the photosensitive layer and the surface protecting layer of the photoreceptor to a constant temperature with said heater;
• placing a transfer paper over a toner image formed by electrophotography on the photoreceptor;
• pressing the transfer paper and photoreceptor with a pressure of 100 kg weight/cm.sup.2 or more using the transferring part such that the transfer paper is pressed between the cylinder supported photoreceptor and the transferring part to simultaneously transfer and fix the toner image onto the transfer paper;
• and
• cleaning the transferring part using the cleaning mechanism.