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AssigneeCanon Kabushiki Kaisha
InventorsShigenori Ueda, Junichiro Hashizume, Makoto Aoki
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For stably obtaining high-quality images with good cleaning properties, with neither occurrence of uneven scraping of a surface layer of a light receiving member nor fusion of a toner, and without occurrence of an image defect even without provision of a heater, the wear loss of the surface layer of a non-monocrystalline hydrogenated carbon film is made not less than 1 Å/10,000 sheets nor more than 10 Å/10,000 sheets after completion of copying processes of A4-size transfer sheets, each copying process including developing an image on a light receiving member with a developer having an average grain diameter of 5 to 8 μm, then transferring the developer image onto a transfer medium, and thereafter scrape-cleaning the surface of the light receiving member with an elastic rubber blade having the hardness of not less than 70 nor more than 80.
An electrophotographic apparatus comprising an electrophotographic photosensitive member, and a charger, an exposure mechanism, a developing device, a transfer mechanism, and a cleaning means provided around the electrophotographic photosensitive member, wherein the cleaning means comprises a blade with an elasticity of a hardness of not less than 70 nor more than 80 for scrape-cleaning a surface of the electrophotographic photosensitive member, wherein the surface of the electrophotographic photosensitive member is formed of non-monocrystalline carbon containing hydrogen atoms, and wherein the wear loss of the surface during passage of A4-size transfer sheets with a developing agent of an average grain diameter of 5 to 8 μm is not less than 1 Å/10,000 sheets nor more than 10 Å/10,000 sheets.
An electrophotographic method of successively carrying out the steps of charging, exposure, development, transfer, and cleaning on an electrophotographic photosensitive member, wherein the development is carried out by use of a developing agent of an average grain diameter of 5 to 8 μm and the cleaning is carried out by use of an elastic blade with a hardness of not less than 70 nor more than 80, wherein the surface of the electrophotographic photosensitive member comprises non-monocrystalline carbon containing hydrogen atoms, and wherein when the above mentioned steps are successively carried out with regard to A4-size transfer sheets, the above mentioned steps are carried out such that the wear loss of the surface of the electrophotographic photosensitive member is not less than 1 Å/10,000 sheets nor more than 10 Å/10,000 sheets.
An electrophotographic photosensitive member comprising a photoconductive layer and having a surface comprising non-monocrystalline carbon containing hydrogen atoms, the surface having a wear loss of not less than 1 Å nor more than 10 Å per 10,000 A4-size transfer sheets when effecting a process of carrying out charging, exposure, subsequent development with provision of a developing agent of an average grain diameter of 5 to 8 μm, subsequent transfer to a transfer sheet and subsequent scrape-cleaning with a blade having an elasticity of a hardness of not less than 70 nor more than 80.
Dependencies are inferred from the claim text.