Device for applying a fluid, in particular lacquers on printed sheets or continuous webs

US4446814A · kind A · utility

Assignee

• M.A.N. - Roland · DE

Inventors

• Paul Abendroth · Offenbach am Main, DE
• Janko Despot · Offenbach am Main, DE

Key dates

• Filing date: Feb 9, 1982
• Grant date: May 8, 1984
• Expiry date: Feb 9, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M7/0027
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A device for application of lacquer or the like to a sheet in a printing press. The lacquer is applied by an applicator cylinder having an associated applicator roller. Lacquer is fed from a fountain having a fountain roller which is slowly driven, the lacquer being transferred from the fountain roller to the applicator roller either directly or through intermediate rollers to form a nip in which the lacquer tends to build up. The amount of lacquer transferred by the fountain roller per unit time is determined by a metering roller which engages the fountain roller. A sensing device located at the nip senses the level of lacquer buildup and produces an output signal upon departure of the building from an optimum level. In one embodiment of the invention the output signal is utilized to bring about a corrective adjustment in the position of the metering roller so that the buildup at the nip tends to be restored to optimum level. In another embodiment the output signal sounds an alarm and, if desired, brings the press to a stop so that the situation can be corrected before the applicator cylinder runs dry.