Elizabeth J Knight

US Patent:

6846608, Jan 25, 2005

Filed:

Nov 29, 2001

Appl. No.:

09/998685

Inventors:

Shiying Zheng - Webster NY, US
Elizabeth Knight - Lafayette CO, US
Thap Dominh - Winter Haven FL, US

Assignee:

Kodak Polychrome Graphics LLC - Norwalk CT

International Classification:

G03F 7004
G03F 7016

US Classification:

4302701, 430171, 4302811, 4302831, 4302861, 4302881, 430302, 430348, 430964

Abstract:

A method to reduce effluence during or immediately after imaging of a printing plate is described. In one embodiment of the invention, the method comprises: (a) applying to a substrate a coating composition comprising a photothermal converter and at least one polymer comprising thiosulfate groups to obtain a coating; and (b) applying a water soluble topcoat to the coating. Preferably, the water soluble topcoat does not comprise a photothermal converter. In another embodiment of the invention, the method comprises applying to a substrate a composition comprising: (a) a photothermal converter; (b) at least one polymer comprising thiosulfate groups; and (c) an additive selected from the group consisting of diazonium, iodonium, copper(I), alkoxypyridinium or maleimide additives.

US Patent:

6949327, Sep 27, 2005

Filed:

Jul 9, 2003

Appl. No.:

10/615665

Inventors:

Shiying Zheng - Webster NY, US
Elizabeth Knight - Lafayette CO, US
S. Peter Pappas - Juno Beach FL, US

Assignee:

Kodak Polychrome Graphics LLC - Norwalk CT

International Classification:

G03F007/038

US Classification:

4302841, 430138, 4302861, 430302, 430309, 430434, 430435, 430494, 430944, 430945

Abstract:

Thermally imageable elements useful as on-press developable lithographic printing plate precursors are disclosed. The elements comprise a substrate and a layer of an imageable composition over the substrate. The imageable composition comprises a photothermal conversion material, particles of a polyurethane polymer, and, optionally, a water soluble polymer. The polyurethane polymer comprises urethane linkages in the main chain, but does not comprise side chain urethane groups.

US Patent:

20040253533, Dec 16, 2004

Filed:

Jun 12, 2003

Appl. No.:

10/459819

Inventors:

Jeffrey Leon - Rochester NY, US
Elizabeth Knight - Lafayette CO, US

International Classification:

G03F007/14

US Classification:

430/270100, 430/302000, 430/964000, 430/935000

Abstract:

The present invention provides a negative working printing plate precursor including a substrate and a thermally sensitive layer. The thermally sensitive layer includes nitrocellulose particles and a photothermal conversion material. The printing plate precursor may be imagewise exposed to radiation and then mounted on a printing press without requiring a separate development step.