Printing – Planographic – Lithographic plate making – and processes of making or using...
Patent
1992-04-30
1993-02-23
Crowder, Clifford D.
Printing
Planographic
Lithographic plate making, and processes of making or using...
101130, 101478, B41C 110
Patent
active
051880334
ABSTRACT:
A direct-to-press imaging system for use in lithographic printing wherein a master-image printing cylinder is used with separate application of ink and water onto its surface to enable repetitive conveyance of image-formatted ink films onto substrates for printing purposes. The imaging system inlcudes a master-image printing cylinder adapted for receiving a hydrophilic coating layer on its surface and a device for laying down a uniform layer of hydrophilic material on the surface of this cylinder. An apparatus is also provided for applying oleophilic materials in image-formatted patterns on top of the layer of hydrophilic material on the master-image printing cylinder to form a printing structure having separate hydrophilic and oleophilic areas of the format to be printed. Further, a mechanism is provided for removing the printing structure including both the hydrophilic and oleophilic materials from the surface of the master-image printing cylinder so that a new printing structure corresponding to a new image to be printed can be formed on the master-image printing cylinder.
REFERENCES:
patent: 3791843 (1974-02-01), Kohlmannsperger
patent: 4833990 (1989-05-01), Hirt et al.
patent: 4846065 (1989-07-01), Mayrhofer et al.
patent: 4872962 (1989-10-01), Scheer et al.
patent: 4959668 (1990-09-01), Hirt
patent: 5129321 (1992-07-01), Fadner
Crowder Clifford D.
Hamann H. F.
Patti C. B.
Rockwell International Corporation
Sewell V. L.
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