Air filter

US6602308B1 · kind B1 · utility

Assignee

• Filterwerk Mann & Hummel GmbH · DE

Inventors

• Thomas Carle · Eppelheim, DE
• Volker Greif · Harthausen, DE
• Stefan Kochert · Waiblingen, DE
• Bernd Spaeth · Ulm, DE
• Klaus Moessinger · Löwenstein, DE

Key dates

• Filing date: Dec 10, 1999
• Grant date: Aug 5, 2003
• Expiry date: Dec 10, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/05
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of making an air filter insert for cleaning the combustion air of an internal combustion engine. The method includes producing the filter insert (21) from a pleated filter medium (33) which is formed into a hollow cylinder, in which at least one end plate (33, 34) made of thermoplastic elastomer or thermoplastic polyurethane is disposed on the axial end faces of the filter medium (33). The at least one end plate (33, 34) is bonded to the cylindrical filter medium (33) by heating the filter medium or the end plate (33, 34) with a high-temperature heating element and fusing the filter medium (33) and the end plate (33, 34) to form a welded joint.