Printing press, and apparatus and process for regenerating...

Details Printing press, and apparatus and process for regenerating... Printing press, and apparatus and process for regenerating...

2005-12-27

2005-12-27

Funk, Stephen R. (Department: 2854)

Printing

Planographic

Lithographic plate making, and processes of making or using...

C101S457000, C101S478000

Reexamination Certificate

active

06978715

ABSTRACT:
A printing press, and an apparatus and a process for regenerating a printing plate can repetitiously reuse the same printing plate and shorten time for decomposition of image areas formed by a hydrophobic organic compound under irradiation with activating light to delete the image areas. A process for regenerating a printing plate including a photosensitive layer, formed on the surface of a substrate, having a photocatalyst exhibits hydrophilicity responsive to activating light having energy higher than the photocatalyst's band-gap energy, and one or more hydrophobic image areas, formed on the surface of the photosensitive layer and operable to hold ink, comprises the steps of: removing ink remaining on the printing plate; hydrophilizing the surface of the printing plate by irradiating with the activating light and by heating the printing plate to delete the hydrophobic image areas; and applying an organic compound onto the printing plate.

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T. Minabe, et al.; “Study of Photo-Induced Hydrophilic Conversion on the TiO2Surfaces Involved by Structural Conformation Thereof”, (Research Center for Advanced Science and Technology, The University of Tokyo. (Translation attached).

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