Apparatus and method for sample sheet removal from the delivery station of a printing press

US5810351A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Reinhard Rückert · Speicher, DE
• Peter Hummel · Offenbach, DE
• Robert Ortner · Alzenau, DE

Key dates

• Filing date: May 2, 1996
• Grant date: Sep 22, 1998
• Expiry date: May 2, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2801/21
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In order to improve the sheet removal at the delivery station of a printing press, a blowing device is provided adjacent a side of a delivery stack of printed sheets. The blowing device includes one or more blowing tubes pneumatically coupled to a sheet hold-up device and two front lays of the printing press at the delivery station. When the sheet hold-up devices are extended into the region of the delivery stack and the front lays are swung to a lowered position, the blowing tubes direct a stream of pressurized air into the region of the front edge of the delivery stack. This pressurized air stream, in turn, produces air cushions above and below the sample sheet which to be drawn out, these air cushions separating the sample sheet from the adjacent printed sheets and permitting air free removal even in the case of large printed formats.