APPARATUS AND METHOD FOR MAKING LITHOGRAPHIC PRINTING PLATES
Apparatus for making lithographic plates directly from a copy original which comprises, an enclosure which houses a copyboard, an optical train and a carriage. The carriage moves in a horizontal path beneath a platen carrying a sheet of electrophotographic material. The carriage has a corona device,...
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| creator | HARRIS GEORGE B RORREST JESS JR KUEHNLE MANFRED R COX RICHARD E CARL DANA HARDY |
| description | Apparatus for making lithographic plates directly from a copy original which comprises, an enclosure which houses a copyboard, an optical train and a carriage. The carriage moves in a horizontal path beneath a platen carrying a sheet of electrophotographic material. The carriage has a corona device, a slit, a toner device including a bias plate and means for withdrawing excess toner. The copyboard is loaded in a horizontal position, is moved to a vertical position where a light scanning assembly moves over its face in synchronism with movement of the carriage. The pattern on the copyboard is projected horizontally into a pit or optical chamber where it is deviated upward to cooperate with the slit. The platen is a cover of the apparatus, can be opened after imaging and toning, the toned electrophotographic member then being removed for further processing. |
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| subjects | CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS |
| title | APPARATUS AND METHOD FOR MAKING LITHOGRAPHIC PRINTING PLATES |
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