Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce color reproduction
Patent
1988-11-28
1991-10-08
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
To produce color reproduction
430 44, G03G 1301
Patent
active
050553658
ABSTRACT:
An image reversal process for the production of electrophotographic color proofs from negative separation films where the photoconductive recording member is reusable and the proofs are produced on printing stock paper and which very closely match the appearance of the printed sheet.
The process of the invention comprises, exposing a photoconductor that is charged to a first polarity through a color separation negative film which may be in contact therewith, developing the unexposed areas on the photoconductor with opposite polarity background toner to form background deposits thereon in areas corresponding to the opaque non-image or background areas on the negative, subjecting the photoconductor and the background deposits thereon to corona discharge of said first polarity to charge the photoconductor in the areas free of said background deposits, that is, in areas corresponding to the transparent image areas on the negative, removing charges of said first polarity from the background deposits, developing the image area on the photoconductor with opposite polarity color toner, and transferring the thus formed color toner deposits to a receptor such as printing stock paper. The process can be repeated for each additional color separation negative film to transfer the additional specific color developed image in proper registry where a proper toner for the specific color image will be used.
REFERENCES:
patent: 4764443 (1988-08-01), Matkan
patent: 4804602 (1989-02-01), Buettner et al.
Alston John T.
Matkan Josef
Cass Myron C.
Crossan S.
McCamish Marion E.
Stork Colorproofing B.V.
LandOfFree
Electrostatic proofing of negative color separations does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrostatic proofing of negative color separations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatic proofing of negative color separations will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-256404