Smoothing device for flat printing materials

US6663550B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Eckart Frankenberger · Darmstadt, DE
• Michael Gieser · Oftersheim, DE
• Peter Hachmann · Dossenheim, DE
• Karl-Heinz Helmstadter · Heidelberg, DE
• Christian Hieb · Schifferstadt, DE
• Ruben Schmitt · Bühl, DE
• Gunter Stephan

Key dates

• Filing date: Aug 31, 2001
• Grant date: Dec 16, 2003
• Expiry date: Aug 31, 2021

Classification

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

Abstract

A smoothing device includes guide surface sections for a flat printing material whose leading edge is pulled in a direction of travel over the guide surface sections. The guide surface sections have openings which communicate with throttling ducts that are pressurized with compressed air during operation. The guide surface sections form a smoothing notch and have air passage openings which communicate with a flow duct. The air passage openings are configured to cause pressure conditions when there is an air throughflow during operation such that the flat printing material forms a bead projecting into the smoothing notch.