| 摘要 |
PURPOSE:To obtain a beautiful picture by a small exposure quantity and at a high speed, without using a complicated process such as charging, etc., by irradiating a picture light through a substrate of a photosensitive body provided with a photoconductive layer, and making a toner adhere onto the photosensitive body. CONSTITUTION:As for a substrate 1 of a photosensitive body, a substrate in which a conductive layer 1b of a metallic film is provided on a glass substrate 1a is used. On this substrate 1, a photoconductive layer 2 is provided. A developing device is provided with a sleeve 4 having a magnet 3 in its inside, and holds a conductive and magnetic toner 5 on its surface. A blade 6 is provided in the vicinity of the outside circumference of the sleeve 4, by which a toner layer is controlled to have a constant thickness. Between the conductive layer 1b of the photosensitive body 1 and the sleeve 4, DC voltage is applied by an electric power supply E. Since the photoconductive layer 2 is an N type semiconductor, positive voltage is applied to the sleeve 4, and through this sleeve 4, voltage is applied to the toner 5. Picture light L is irradiated through the substrate 1 of the photosensitive body, the toner 5 adheres onto the photosensitive body 1 in accordance with highlight of the picture light L, and an image is formed. |
