Printing – Planographic – Lithographic printing plates
Patent
1995-06-07
1997-06-03
Funk, Stephen R.
Printing
Planographic
Lithographic printing plates
101457, 101467, B41N 108
Patent
active
056344031
ABSTRACT:
Seamless, sleeve-shaped dry and wet lithographic printing members that can be recycled after use are disclosed, along with methods for their manufacture and use. The members include a strong, durable, hollow cylinder or sleeve that is attached to the plate mandrel or cylinder jacket of an offset printing press or platemaking apparatus. Surrounding the sleeve is a layer of a material, preferably polymeric in nature, which is characterized by efficient, ablative absorption of laser radiation, as well as other layers that facilitate imaging and subsequent printing. A layer disposed beneath the ablatable layer reflects unabsorbed imaging radiation back into the ablatable layer.
REFERENCES:
patent: 637562 (1899-11-01), Hett
patent: 3677178 (1972-07-01), Gipe
patent: 4846065 (1989-07-01), Mayrhofer et al.
patent: 4913048 (1990-04-01), Tittgemeyer
patent: 4958564 (1990-09-01), Fuhrmann et al.
patent: 5339737 (1994-08-01), Lewis et al.
patent: 5378580 (1995-01-01), Leenders
Research Disclosure, Apr. 1980, at p. 131.
Nechiporenko et al., "Direct Method of Producing Waterless Offset Plates By Controlled Laser Beam".
Lewis Thomas E.
Williams Richard A.
Funk Stephen R.
Presstek Inc.
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