| 摘要 |
An electrophotographic apparatus comprises an electrostatic charge retentive drum composed of a metal cylindrical body and a photosensitive or insulating charge retentive layer applied on the cylindrical body. A corona charger serves to homogeneously change the charge retentive layer, and an optical system projects an optical image of a document to be copied onto the charge retentive layer so as to form a latent image. The latent image is developed with toners into a toner image and transferred onto a paper. The toner image is fixed on the paper and the whole surface of the charge retentive layer is cleaned.
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