Arrangement for washing cylinders on printing presses

US4270450A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Kurt Difflipp · Dietzenbach, DE
• Harry M. Greiner · Offenbach am Main, DE

Key dates

• Filing date: Sep 10, 1979
• Grant date: Jun 2, 1981
• Expiry date: Sep 10, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41P2235/22
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A washing assembly for a lithographic press including a washing roller having a porous resilient surface for carrying a charge of cleaning fluid, the washing roller being mounted in a frame for rocking movement from a disengaged position to a first washing position in which the washing roller is engaged with the surface of the blanket cylinder and a second washing position in which the roller is engaged with the surface of the impression cylinder. A drive wheel is provided at the end of the blanket cylinder for coupling to a driven wheel at the end of the washing roller as the frame is rocked to its first washing position for differential driving of the washing roller to produce relative wiping against the surface of the blanket cylinder. A squeeze roller in pressing engagement with the washing roller prepares the surface of the washing roller to accept a fresh charge of cleaning fluid. In the preferred embodiment as used in a "five cylinder" press, first and second washing rollers are journaled on different portions of the same frame so that in the first washing position of the frame the washing rollers respectively engage the surfaces of separate blanket cylinders. The gap in the…