Laser-driven method and apparatus for lithographic imaging and printing plates for use therewith
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United States of America Patent
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Aug 1, 2000
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N/A
app pub date -
Oct 7, 1999
filing date -
Jul 20, 1992
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Abstract
Apparatus and methods for imaging lithographic plates using laser devices that emit in the near-infrared region, and plates suitable for imaging with the apparatus and methods. Laser output either ablates one or more plate layers or physically transforms a surface layer, in either case resulting in an imagewise pattern of features on the plate. The image features exhibit an affinity for ink and/or a fluid to which ink will not adhere that differs from that of unexposed areas.
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