Method and apparatus for re-imaging a previously used printing form

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United States of America Patent

PATENT NO 8981254
APP PUB NO 20120032376A1
SERIAL NO

13192983

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a method for re-imaging a printing form that has been used for printing in a prior printing process a substrate of the printing form is cleaned globally of ink or varnish and the substrate is treated abrasively globally in order to erase a preceding printing image. The substrate to be imaged with a new printing image is treated locally in image regions with a pulsed laser beam and, in the process, a nanoscopic and hydrophobic surface structure is produced locally. The substrate is treated globally with a hydrophilicity intensifier, as a result of which the substrate becomes hydrophilic locally in the previously hydrophobic image regions. An apparatus has a corresponding erasing unit and an imaging unit with a femtosecond laser.

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Patent Owner(s)

  • HEIDELBERGER DRUCKMASCHINEN AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mechler, Bernhard Heidelberg, DE 3 23
Pitz, Heiner Weinheim, DE 21 294
Spilger, Rolf Viernheim, DE 11 38

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