Method of crosscutting a moving web

US6880439B2 · kind B2 · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Robert Kersch · Augsburg, DE
• Wolfgang Zeller · Würzburg, DE

Key dates

• Filing date: Mar 26, 2003
• Grant date: Apr 19, 2005
• Expiry date: Apr 5, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/4847
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A method of cross-cutting a moving web uses a cutting knife operably mounted on a knife cylinder having a circumferential distance LZ where LZ is smaller than a cut length, LA. The knife cylinder for revolving in a first and a second opposite direction is powered by a drive motor in either direction. The method includes revolving the knife cylinder in a first direction, cutting the web with the cutting knife, and completing a first cut. The knife cylinder is then reversed to retard progress in the first direction and then accelerated to the speed of the moving web until starting the second cut.