Dampening unit for an offset printing machine

US5680815A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Harwin Laumann · Dietzenbach, DE
• Karl-Peter Klein · Bad Dürkheim, DE
• Wolfgang Rozek · Offenbach, DE
• Peter Hummel · Offenbach, DE
• Robert Ortner · Alzenau, DE

Key dates

• Filing date: Feb 28, 1996
• Grant date: Oct 28, 1997
• Expiry date: Feb 28, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F7/26
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A dampening unit for an offset printing machine having an applicator roller including a central section and two oppositely disposed tapered end sections to prevent the transference of excessive amounts of dampening medium to the printing plate is disclosed. The boundaries between each of the end sections and the central section of the applicator roller are located adjacent predetermined regions defined on the plate cylinder to ensure a uniform dampening medium film is produced across the entire format width of the material to be printed.