Printing machine for printing and final varnishing of sheets

US4664949A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Harry M. Greiner · Offenbach am Main, DE
• Claus Simeth · Mühlheim, DE

Key dates

• Filing date: Jul 18, 1985
• Grant date: May 12, 1987
• Expiry date: Jul 18, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F23/08
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

In accordance with the invention a varnishing unit in a printing machine is provided which simultaneously varnishes and perfects printing sheets. The varnishing unit comprises a rotating impression cylinder in contact with a rotating varnishing cylinder to create a nip between the two cylinders through which sheets are individually drawn. In order to perfect each sheet at the nip, the impression cylinder has at least one plate or a blanket secured to its surface. Depending on whether a plate or a blanket is secured to the impression cylinder, an appropriate dampening and inking means is provided. Similarly, the varnishing cylinder is supplied a controlled quantity of varnish by a varnishing means.