Device for metering and equalizing an ink layer on the surface of a printing machine roller

US6523469B2 · kind B2 · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Wolfgang Bayer · Meitingen, DE
• Andreas Berchtold · Lingen (Ems), DE
• Thomas Bock · Neuss, DE
• Robert Konrad · Wiesenbach, DE
• Harald Lesti · Aichach, DE
• Xaver Bachmeir · Aichach, DE

Key dates

• Filing date: Jun 8, 2001
• Grant date: Feb 25, 2003
• Expiry date: Jun 9, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F31/027
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A device for metering and equalizing an ink layer on the surface of a printing machine roller, in particular on the surface of an ink applicator roller in the inking unit of a printing machine, the surface being additionally wetted with dampening medium. The device contains at least two doctor blades which are arranged preferably at a short distance one behind the other in the direction of rotation of the roller and rest under pressure against the surface of the roller and of which a front doctor blade, with respect to the direction of rotation of the roller, has a doctor blade edge radius such that essentially only the dampening medium, but not the ink layer, can be wiped off from the surface of the roller by said front doctor blade, while a rear doctor blade, with respect to the direction of rotation of the roller, has, by comparison, a smaller doctor blade edge radius such that at least part of the ink layer which has remained on the surface of the roller can be wiped off.