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US 2009/0123872 A1Published application
Inkjet-imageable lithographic printing members and methods of preparing and imaging them
OwnerAlbert S. Deutsch, Eugene L. Langlaisinventors
Life of this patent
Estimating the term…
Abstract
Lithographic printing plates are imaged using an inkjet printer to imagewise apply a chemical or masking agent onto the plate surface. In some embodiments, the chemical causes an affinity change, thereby facilitating lithographic printing.
Claims11
1-15. (canceled)
A method of imaging a lithographic printing member, the method comprising the steps of:
- (a) providing a printing member comprising a photosensitive top layer having a first lithographic affinity and a layer thereunder having a second lithographic affinity opposite to the first lithographic affinity, the top layer comprising a material which, upon subjection to an imaging fluid, becomes crosslinkable by exposure to actinic radiation;
- (b) dispensing the imaging fluid in an imagewise pattern;
- (c) exposing the printing member to actinic radiation, thereby crosslinking portions of the top layer that have received imaging fluid;
- (d) subjecting the printing member to a solvent, the solvent disrupting non-image, uncrosslinked portions of the top layer;
- and
- (e) removing the non-image portions of the top layer, thereby creating an imagewise lithographic pattern on the printing member.
3 more elements
25-95. (canceled)
Dependencies are inferred from the claim text.