Water cooled ink roller for printing presses

US4183298A · kind A · utility

Assignees

• Roland Offsetmaschinenfabrik Faber & Schleicher AG
• Grapho Metronic Mess- und Regeltechnik GmbH & Co. KG · DE

Inventors

• Bert Cappel · Mühlheim, DE
• Peter Mayer · Neumarkt an der Ybbs, AT
• Burkhardt Wirz · Munich, DE
• Peter Decker · Marl, DE

Key dates

• Filing date: Feb 17, 1978
• Grant date: Jan 15, 1980
• Expiry date: Feb 17, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F31/002
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An ink roller for a printing press having a cylindrical outer shell presenting a roller surface and having a control fluid-displacing core, a hollow cylindrical partition being interposed between the shell and the core to define inner and outer annular passageways connected in series having respective inlet and outlet openings. A source of cooling fluid is connected to the inlet opening so that a feed stream of cooling fluid flows longitudinally through the inner passage and turns around to form a cooling stream flowing in counterflow relation through the outer passage. The cylindrical partition is formed of conductive material so that heat absorbed at a given region of the roller surface by the cooling stream flows radially inwardly for absorption by the feed stream at substantially the same rate, so that the cooling stream has only minimum net gain or loss of heat; this tends to equalize the temperature along the length of the cooling stream and hence along the length of the roller surface. In the preferred embodiment of the invention the thermal conductivity of the cylindrical partition in the radial direction is so varied as a function of length that the rate of heat transfer r…