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US 4,364,656 AGranted
Electrophotographic copying machine
AssigneeRicoh Company, Ltd.
InventorNobuyuki Yanagawa
Life of this patent
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AssigneeRicoh Company, Ltd.
InventorNobuyuki Yanagawa
Estimating the term…
An electrophotographic copying machine includes a photosensitive member in the form of an endless belt which repeats a stop and an angular motion. A carriage reciprocates above a flat run of the photosensitive member in parallel relationship therewith when the latter is at rest. A charger, an illumination unit, an optical system and a high tension generator are mounted on the carriage. The charger is utilized to charge the photosensitive member to a given polarity. The illumination unit illuminates an original which is fixedly placed on an original receptacle. The optical system projects an image of the original illuminated onto the photosensitive member. The high tension generator supplies a current to the charger and the illumination unit. During a movement of the carriage in the forward direction, the charger charges the photosensitive member to a given polarity, on which the image of the original illuminated is projected by the optical system, thus forming an electrostatic latent image on the photosensitive member. The latent image is converted into a visual image as the photosensitive member passes through a developing unit during its angular movement. The visual image is transferred onto a transfer sheet which is brought into contact with the photosensitive member. After the transfer step, the surface of the photosensitive member is cleaned.
In an electrophotographic copying machine including a photosensitive member in the form of an endless belt having a portion which remains flat when the belt is at rest, a carriage disposed for reciprocating motion in parallel relationship with the flat portion of the photosensitive member, support means for supporting the carriage in a reciprocable manner, drive means for causing a reciprocating motion of the carriage, a charger mounted on the carriage for charging the photosensitive member by a corona discharge, an illumination unit mounted on the carriage for illuminating an original located in place, and a light transmitting device for transmitting an image of the illuminated original onto the photosensitive member;
An electrophotographic copying machine including a photosensitive member in the form of an endless belt having a portion which remains flat when the belt is at rest, a carriage disposed for reciprocating motion in parallel relationship with the flat portion of the photosensitive member, support means for supporting the carriage in a reciprocable manner, drive means for causing a reciprocating motion of the carriage, a charger mounted on the carriage for charging the photosensitive member by a corona discharge, a high tension generator mounted on the carriage for supplying a high tension to the charger, an illumination unit mounted on the carriage for illuminating an original located in place, a light transmitting device for transmitting an image of the illuminated original onto the photosensitive member, a pair of shield screens disposed forwardly and rearwardly of the carriage as viewed in the direction of movement thereof to prevent extraneous light which does not pass through the light transmitting device from reaching the photosensitive member, the upper surface of the shield screens carrying electrical conductors in the form of flexible cables extending to the illumination unit and to the high tension generator so as to be freely flexible thereon, the respective shield screens having their one edge secured to the carriage and their other edge connected with respective take-up drums urged to take up the respective screens, the take-up drum being located on the opposite side of the screen from the conductors.
Dependencies are inferred from the claim text.