The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2003
Filed:
Dec. 10, 1999
Thomas Carle, Boeblingen, DE;
Volker Greif, Sindelfingen, DE;
Stefan Kochert, Weinstadt, DE;
Bernd Spaeth, Ulm, DE;
Klaus Moessinger, Obersulm, DE;
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
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 ( ) from a pleated filter medium ( ) which is formed into a hollow cylinder, in which at least one end plate ( ) made of thermoplastic elastomer or thermoplastic polyurethane is disposed on the axial end faces of the filter medium ( ). The at least one end plate ( ) is bonded to the cylindrical filter medium ( ) by heating the filter medium or the end plate ( ) with a high-temperature heating element and fusing the filter medium ( ) and the end plate ( ) to form a welded joint.