Method for adjusting the inking for a pressrun in a rotary printing machine

US5907999A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Erwin Lusar · Königsbrunn, DE
• Martin Endisch · Wertingen, DE

Key dates

• Filing date: May 18, 1998
• Grant date: Jun 1, 1999
• Expiry date: May 18, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41P2233/12
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention provides a method for arranging the inking for a pressrun in a rotary printing machine. The rotary printing machine has an inking mechanism and a dampening mechanism. The ink quantity transmitted by an ink ductor is adjusted by zone via ink zone ductor blades. When the dampening mechanism is switched off, the run-up curve of the inking mechanism is initially adjusted at an average surface coverage over the entire surface, so that a constant ink density corresponding to the average surface coverage results on the printing stock for all printing speeds. The run-up curve of the dampening mechanism is adjusted subsequently, wherein the ink zone ductor blades are in different positions which correspond to various surface coverage values of a printing subject customarily printed by the printing machine. The adjustment is effected in such a way that the ink zones with average surface coverage deliver a constant ink density to the printing stock for all printing speeds. The surface coverage in ink zones not having the average surface coverage is measured at different printing speeds. A measurement for the readjustment of the ink zone measuring devices is obtained from the dev…