Sheet guiding apparatus for a turning device in a rotary printing machine for face-printing and/or perfecting

US5598779A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Hanns-Otto Haas · Heusenstamm, DE
• Ingo Kobler · Bendorf, DE
• Klaus Wolf · Stüttgen, DE
• Peter Mayer · Neumarkt an der Ybbs, AT
• Josef Mathes · Offenbach, DE
• Fred Spies · Mühlheim, DE
• Stephan Kanzler · Langen, DE

Key dates

• Filing date: Sep 29, 1995
• Grant date: Feb 4, 1997
• Expiry date: Sep 29, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41F21/108
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A sheet-guiding apparatus for a turning device in a rotary printing machine guides a sheet being printed to prevent smearing. The turning device includes a turning drum and at least one sheet-guiding cylinder. The turning drum and the sheet-guiding cylinder define a sheet transfer region and a sheet transfer path. The sheet-guiding apparatus comprises an air blower means, at least one blower/suction device, and a lower sheet-guiding device. The air blower means, which is arranged upstream of the sheet transfer region, includes a first set of air outlet openings for directing compressed air toward the sheet-guiding cylinder and at least a second air outlet opening for directing compressed air into the transfer region. The blower/suction device, which is disposed within the sheet-bearing surface of the turning drum, communicates with a plurality of openings disposed in the sheet-bearing surface and is coupled to a pneumatic device. The lower sheet-guiding device is disposed below the sheet transfer path and is switchable between providing compressed air and providing air suction. The air blower means, blower/suction device, and the lower sheet-guiding device cooperate to provide a co…