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US 5,632,204 AGranted
Thin-metal lithographic printing members with integral reflective layers
AssigneePresstek, Inc.
InventorThomas E. Lewis
Life of this patent
Estimating the term…
Abstract
Laser-imageable lithographic printing members have thin metal imaging layers and layers thereunder that reflect imaging radiation. Radiation from an imaging pulse that passes through an imaging layer is returned to that layer, thereby augmenting the effective energy flux density. The constructions can include dimensionally stable base supports adhered to the reflective substrate by, for example, lamination.
Claims11
A lithographic printing member directly imageable by laser discharge, the member comprising:
- a. a topmost first layer;
- and
- b. a titanium layer, disposed thereunder, that ablatively absorbs imaging radiation;
- and
- c. a thermally non-dissipative substrate underlying the second layer, the substrate comprising a material that reflects imaging radiation,
- wherein
- d. the first layer and the substrate exhibit different affinities for at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink.
4 more elements
A laminated lithographic printing member directly imageable by laser discharge, the member comprising:
- a. a topmost first layer;
- b. a second layer underlying the first layer and formed of a material subject to ablative absorption of imaging radiation whereas the first layer is not;
- c. a third layer, substantially transparent to imaging radiation, underlying the second layer, the first and third layers exhibiting different affinities for at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink;
- and
- d. a support;
- and
- e. a layer of laminating adhesive anchoring the third layer to the support, the laminating adhesive comprising a material that reflects imaging radiation.
4 more elements
Dependencies are inferred from the claim text.