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AssigneeSharp Kabushiki Kaisha
InventorsYasushi Nakanishi, Takahiro Fukunaga, Manabu Matsumoto
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An image forming apparatus with a main body composed of a light source, a photoreceptor, charging device for electrostatically a charging the surface of the photoreceptor, a developing device for supplying toner particles to the surface of the photoreceptor a transferring charger for transferring a toner image formed on the surface of the photoreceptor onto a copying sheet, and a high-voltage source for applying a high voltage trigger to both said charging device and the transferring charger simultaneously. The apparatus is designed to execute original scanning as an original glass plate is moved with respect to the main body, characterized in containing a reflecting unit for reflecting the light from the light source to illuminate the surface of the photoreceptor at an area between the charging device and the developing device, the reflecting unit is disposed at a position corresponding to the trailing end of the original glass plate in its forward movement for original scanning. The apparatus is designed to eliminate the need of providing an independent light source for blank exposure thereby simplifying the arrangement for blank exposure to be performed with respect to the photoreceptor and saving the manufacturing cost for the apparatus.
An image forming apparatus which comprises, in a main body thereof, a light source, a photoreceptor, charging means for electrostatically charging the surface of the photoreceptor, developing means for supplying toner particles to the surface of the photoreceptor, transferring means for transferring onto a copying sheet a toner image formed on the surface of the photoreceptor, and high-voltage applying means for applying a high voltage trigger to both said charging means and said transferring means simultaneously, said apparatus being designed to execute original scanning as an original glass plate is moved with respect to said main body, characterized in comprising a reflecting unit for reflecting the light from the light source to illuminate the surface of the photoreceptor at an area between the charging means and the developing means, said reflecting unit being disposed at a position corresponding to the trailing end of the original glass plate in its forward movement for original scanning, and control means for causing the original glass plate to stop at an original scanning completing station after the end of the original scanning until the end of the stage of image transferring by the transferring means and for causing the light source to continue light emission so that the charge which is applied to a non-image area of the photoreceptor surface after the end of the original scanning until the end of the stage of image transferring is removed by the light from the light source that is reflected by said reflecting unit to illuminate the surface of the photoreceptor.
An image forming apparatus which comprises, in a main body thereof, a light source, a photoreceptor, charging means for electrostatically charging the surface of the photoreceptor, developing means for supplying toner particles to the surface of the photoreceptor, transferring means for transferring onto a copying sheet a toner image formed on the surface of the photoreceptor, and high-voltage applying means for applying a high voltage trigger to both said charging means and said transferring means, said apparatus being designed to execute original scanning as an original glass plate is moved with respect to said main body, characterized in comprising a reflecting unit for reflecting the light from the light source to illuminate the surface of the photoreceptor at an area between the charging means and the developing means, said reflecting unit being disposed at a position corresponding to the leading end of the original glass plate in its forward movement for original scanning, and control means for causing the original glass plate to stop at an original scanning starting station prior to the start of the original scanning and for causing the light source to emit light so that the charge which is applied to a non-image area of the photoreceptor surface until the start of the original scanning is removed by the light from the light source that is reflected by said reflecting unit to illuminate the surface of the photoreceptor, thereby cleaning the photoreceptor.
Dependencies are inferred from the claim text.