Method of manufacturing filters

US5919122A · kind A · utility

Assignees

• Filterwerk Mann & Hummel GmbH · DE
• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Michael Geiger · Hersbruck, DE
• Joachim Montnacher · Munster, DE
• Josef Rohrmeier · Laberweinting, DE
• Thomas Zink · Munich, DE

Key dates

• Filing date: Oct 9, 1997
• Grant date: Jul 6, 1999
• Expiry date: Oct 9, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S493/941
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for the manufacture of filters in which a filter material in the rm of a continuous web is pre-embossed, perforated with a laser beam, and then pleated. The pleated filter element is fixed in a subsequent operation in an apparatus and the perforated scrap areas and are removed from the filter element.