Method of producing a printing image carrier

Details Method of producing a printing image carrier Method of producing a printing image carrier

1989-07-17

1992-09-08

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce printing surface

1014631, 204224R, G03G 1326, C25D 1700

Patent

active

051457580

ABSTRACT:
An offset litho or other surface printing press has a printing image carrier with image areas defined by water repelling and water-wettable properties. In order to make possible a reconfiguration of the image directly in the press the printing image carrier is in the form of an electrically conducting substrate, as for example nickel, M which is coated with a polymer to define such areas. The deposition of the polymer is controlled electrochemically with the plate cylinder acting as one electrode and the opposite electrode being in the form of a roller able to rotate in an electrolyte container. One of the two electrodes is in the form of matrix and is activated in a manner in conformity with a pattern of halftone dots corresponding to the desired image. Dependent on whether the polymer is hydrophobic or hydrophilic, the ink accepting areas or either the coated or non-coated parts of the substrate.

REFERENCES:
patent: 3638567 (1972-02-01), Walkup et al.
patent: 4599288 (1986-07-01), Fuchizawa
patent: 4718340 (1988-01-01), Love et al.
patent: 4729310 (1988-03-01), Love et al.
patent: 4849314 (1989-07-01), Blanchel-Fincher
patent: 4872962 (1989-10-01), Scheer et al.

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