Gravure printing base cylinder, and method of its manufacture

US4391879A · kind A · utility

Assignee

• W. C. Heraeus GmbH · DE

Inventors

• Peter Fabian · Alzenau, DE
• Theo Muller · Wuustwezel, BE

Key dates

• Filing date: Dec 2, 1981
• Grant date: Jul 5, 1983
• Expiry date: Dec 2, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12063
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

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.