Photocopying – Contact printing – Light boxes
Patent
1989-08-28
1992-03-24
Grimley, Arthur T.
Photocopying
Contact printing
Light boxes
430 5, 430 49, 430 56, 430 62, 355210, G03G 1504
Patent
active
050992848
ABSTRACT:
A master sheet for use in reproducing an original image in a xeroprinting system comprises a transparent supporting dielectric layer, a photoconductive layer, a transparent conductive layer between the dielectric and photoconductive layers, and a mask of opaque material deposited upon the exposed face of the dielectric layer in a predetermined pattern according to the original image. Exposure of the photoconductive layer to light directed through the mask causes a latent image to be formed on the master sheet. A xeroprinting drum assembly for use in a xeroprinting system is also provided wherein a rotatable support drum is wrapped with an electroluminescent (EL) sheet and then the master sheet. The drum assembly may be rotated while the EL sheet selectively exposes the photoconductive layer to provide a latent image. Alternatively, a slit light source may be used.
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Dang Thu A.
Eastman Kodak Company
Grimley Arthur T.
Howley David A.
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