Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1987-05-04
1989-01-10
Grimley, A. T.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 3R, 355 3DD, G03G 2100, G03G 1500
Patent
active
047977086
ABSTRACT:
In electrographic apparatus a latent image on a flexible photoconductor is developed with toner particles at a development station and subsequently transferred to a receiver sheet, such as a copy sheet, and then fused to the sheet. Sometimes unwanted particles also are on the photoconductor, including the area of a developed image on the photoconductor. Unless the unwanted particles are removed before the developed image is transferred to a copy sheet, the particles can create image voids or other defects in the image on the copy sheet. These particles are removed by a vacuum system including a plenum having an inlet opening located closely adjacent the surface of the photoconductor between the development station and the transfer station. It is important to precisely maintain the desired spacing between the vacuum plenum opening and the photoconductor. In order to maintain this spacing, the plenum is mounted for movement toward and away from a guide roller supporting the photoconductor, and tires on the ends of the plenum contact the roller so that the plenum moves with the roller and thus the photoconductor.
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Research Disclosure, Jan. 1985, Item 24942, pp. 73, 74.
Fiske John M.
Kasiske, Jr. W. Charles
Eastman Kodak Company
Grimley A. T.
Nguti Tallam I.
Pipala Ed
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