Printing system for flying plate change

US5134934A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Peter Knauer · Munster, DE
• Erich Wech · Augsburg, DE

Key dates

• Filing date: May 29, 1991
• Grant date: Aug 4, 1992
• Expiry date: May 29, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41P2217/13
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

To permit flying plate change of printing plates (14, 15; 28, 29) on plate cylinders (10, 11; 24, 25) of an offset printing system having blanket cylinders (1,2), one of which can function as an impression cylinder (2, 1), the plate cylinders, to maintain register, are axially fixed in the frame (3) of the printing machine, but the blanket cylinders are movable by an eccenter system between three positions (6, 7, 8) and an ink application roller (16) to which also damping fluid can be applied from a damper (20) is selectively engageable with either one of the plate cylinders. Thus, only the blanket cylinder (1, 2) and the associated impression cylinder (2, 1) need be shifted for respective engagement with the plate cylinders, and register alignment of the plate cylinders is maintained. An ink application roller is selectively engageable with the plate cylinders, for example by being supported on a swing shaft or a swing lever (17), with which also a damping fluid application roller (19) is engageable.