Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2001-06-07
2004-04-20
Huff, Mark F. (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
C430S019000, C430S281100, C430S302000, C430S303000, C430S348000, C430S394000, C430S494000, C101S453000, C101S465000, C101S478000
Reexamination Certificate
active
06723491
ABSTRACT:
BACKGROUND OF THE INVENTION
Plateless imaging is a method of generating an image directly on a printing cylinder. The coating materials, which form the plateless printing member together with the cylinder surface, are applied on-press. The coating materials are applied in a liquid state and then cured. After each printing job, the cured materials are removed and the printing cylinder is prepared for reuse, either by cleaning the priming cylinder or by replacing a reusable substrate.
The use of cross-linked poly-dimethyl siloxane (PDMS) is well known in waterless offset printing. In existing plateless printing systems, the PDMS coating is cured by heating it to a temperature of approximately 120° C. to 150° C. In order to prevent toning, the printing cylinder has to be cooled before printing to a temperature of approximately 20° C.
It would be desirable to use a coating that eliminates the need for heating the printing press.
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D. Zhang, S.M. Dougal and M.S. Yeganeh, Effects of UV Irradiation and Plasma Treatment on a Polystyrene Surface Studied by IR-Visible Sum Frequency Generation Spectroscopy, Langmuir 2000, 16, 4528-4532.
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R. Eckberg, S. Rubinsztajn, M. Krenceski, J. Hathenway, R. Griswold,Novel Radiation Curable Vinyl Ether-Epoxysilicone Compositions and Coatings, RadTech 2000, Conference Proceedings, pp. 69-86.
Gilliam Barbara
Huff Mark F.
Katten Muchin Zavis & Rosenman
KBA (Advanced Imaging Technology) (Israel) Limited
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