Method and apparatus for laser-discharge imaging

Details Method and apparatus for laser-discharge imaging Method and apparatus for laser-discharge imaging

B - Operations, Transporting

41

C

B41C 1/05 (2006.01) B41C 1/10 (2006.01) B41N 1/14 (2006.01) G02B 6/32 (2006.01) G02B 13/18 (2006.01) G02B 27/40 (2006.01) H01S 3/10 (2006.01)

Patent

CA 2100413

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 or an ink-abhesive fluid that differs from that of unexposed areas.

Appareil et méthodes permettant d'appliquer une image sur des plaques lithographiques au moyen de dispositifs au laser qui émettent dans le proche infrarouge, et plaques conçues pour cet appareil et ces méthodes. Le rayonnement laser enlève une ou plusieurs couches de la plaque ou en transforme physiquement la couche de surface, ce qui, dans les deux cas, résulte en une série de motifs formant une image sur la plaque. Les motifs formant l'image ont une affinité pour l'encre ou un fluide repoussant l'encre, contrairement aux endroits non exposés de la plaque.

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