Coated transparent film for laser imaging
AssigneeJames River Graphics, Inc.
InventorsRaymond L. Oransky, David G. Savage
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Abstract
Disclosed is a laser-imagable material comprising a transparent film having thereon a dried coating comprising graphite particles and binder. Also disclosed is the method of making the laser-imagable material and the method of imaging it.
Claims18
A laser-imageable member comprising a transparent film having thereon a dried, uniform coating comprising graphite particles and (sufficient) a non-self-oxidizing binder (to form a stable coating.) in sufficient quantity to prevent removal of the coating under normal handling conditions.
Method of making a laser-(imagable) imageable member comprising the steps of (a) applying to a transparent film a uniform coating comprising graphite particles and (sufficient) a binder (to form a stable coating) comprising ethyl cellulose in sufficient quantity to prevent removal of the coating under normal handling conditions, said graphite and binder being dispersed in an organic diluent and (b) drying the coating.
Method of making an imaged transparency comprising the steps of:
- (a) providing a laser-imageable member (which comprises) including a transparent film having thereon a dried uniform coating (comprising) of a liquid dispersion of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling;
- and
- (b) directing laser energy in an image pattern to the coating to selectively remove the portion of the coating to which the laser energy is directed.
Method of producing a printing plate comprising intimately contacting with a lithographic printing surface, the coated surface of a transparent film having a uniform coating of graphite particles and a non-self-oxidizing binder in sufficient quantity to prevent removal of the coating under normal handling conditions, and directing a laser beam image pattern through the transparent film for selectively transferring a portion of the coated surface corresponding to said image pattern from said film to said lithographic printing surface.
Dependencies are inferred from the claim text.