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US 2002/0162469 A1Published application
Lithographic imaging with printing members having multiphase laser-responsive layers
AssigneePresstek, Inc.
InventorGerald P. Harwood JR.
Life of this patent
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Abstract
The present invention provides a printing member having a single radiation-absorptive multiphase layer over a substrate layer that may be imaged with or without ablation.
Claims39
A method of imaging a lithographic printing member, the method comprising the steps of:
- a. providing a printing member comprising a substrate layer and a multiphase layer in contact with the substrate along an interface, the multiphase layer having a polymer-rich phase and an inorganic-rich phase, the polymer-rich phase having a different affinity at least from the substrate layer for a printing liquid;
- b. exposing in an imagewise pattern the printing member to imaging radiation so as to remove or facilitate removal of at least a portion of the multiphase layer;
- and
- c. removing remnants of the multiphase layer, thereby creating an imagewise lithographic pattern on the printing member.
1 more element
A lithographic printing member comprising a substrate layer and a multiphase layer in contact with the substrate along an interface, the multiphase layer having a polymer-rich phase and an inorganic-rich phase, wherein:
- (i) the polymer-rich phase has a different affinity at least from the substrate for a printing liquid;
- and
- (ii) the multiphase layer is characterized by absorption of imaging radiation, thereby facilitating removal of at least a portion of the multiphase layer.
Dependencies are inferred from the claim text.