Stock material or miscellaneous articles – All metal or with adjacent metals – Having metal particles
Patent
1981-12-02
1983-07-05
Hunt, Brooks H.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having metal particles
428553, 101170, 101153, 29132, B41F 1308, B41F 3500
Patent
active
043918794
ABSTRACT:
A roto-gravure printing base cylinder is made by providing a cylindrical body (1), for example of steel, and applying thereover a cover layer (2) by thermal spraying, for example plasma-spraying, or arc-spraying. The cover layer is made of a material which is inert with respect to electrolytes used in applying a further copper layer over the cover layer to form a finished roto-gravure cylinder for optical engraving, for example an electrochemical valve metal, preferably tantalum, niobium or, most desirably, titanium oxide, forming a matrix in which, before application of the material as a layer on the steel cylinder, electrochemically active materials are applied made of a metal, preferably of the platinum group or other noble metal, and uniformly distributed over the surface, settled on the matrix material.
REFERENCES:
patent: 1643046 (1927-09-01), Ballard
patent: 1831645 (1931-11-01), Ballard
patent: 2127824 (1938-08-01), Leuchter
patent: 2776256 (1957-01-01), Eulner et al.
patent: 3923610 (1975-12-01), Bergin et al.
patent: 4060882 (1977-12-01), Pospisil et al.
Fabian Peter
Muller Theo
Hunt Brooks H.
W. C. Heraeus GmbH
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