Device for guiding sheets printed on one or both sides

US4572071A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Bert Cappel · Mühlheim, DE
• Norbert Kreuzer · Brackenheim, DE

Key dates

• Filing date: Mar 19, 1985
• Grant date: Feb 25, 1986
• Expiry date: Mar 19, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2406/365
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A sheet guiding device for use with a multicolor printing press having multiple printing units and a sheet stacker wherein the sheet guiding means is disposed between at least one of a pair of printing units and the stacker for guiding sheets therebetween, the guiding means including a chain conveyor with sheet grippers overlying a guide surface between the printing units and the stacker with a plurality of air nozzles formed in the surface of the guide surface and communicating with a plurality of flow ducts, the guide surfaces being disposed continuously and uninterruptedly between the printing units and the sheet stacker and the air nozzles being in the form of apertures in the guide surfaces having a diameter of about 15 mm, the area of the apertures being from 15 to 30% of the total guide surface area, the apertures being supplied by low-pressure high-volume-flow fans disposed in the flow ducts and the fans being reversible so that the nozzles can be selectively supplied with air at a positive or negative pressure.