Method to remove unwanted, unexposed, positive-working, IR...

Details Method to remove unwanted, unexposed, positive-working, IR... Method to remove unwanted, unexposed, positive-working, IR...

2007-09-25

2007-09-25

Gilliam, Barbara L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S302000, C430S309000, C430S463000, C430S494000

Reexamination Certificate

active

11058973

ABSTRACT:
A method for eliminating unwanted ink-receptive sections in positive working printing plates resulting from shading of the surface layer during exposure by the clamps holding the plate on the exposure apparatus following development of an imagewise exposed precursor. Accordingly the areas that are shaded are identified prior to development and the surface layer is scored in those areas to a depth and density sufficient to result in the scored layer being removed during development but not deep enough to damage the underlying hydrophilic layer.

REFERENCES:
patent: 5345870 (1994-09-01), Bailey et al.
patent: 6248503 (2001-06-01), Vermeersch et al.
patent: 6732653 (2004-05-01), Shimazu et al.
patent: 6843176 (2005-01-01), Ray et al.
patent: 1-142638 (1989-06-01), None

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