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:
Mar. 28, 2006
Filed:
Jun. 26, 2002
Gerd Altmeyer, St. Ingbert, DE;
Jurgen Lang, Sulzbach, DE;
Harald Mees, Lebach, DE;
Hydac Filtertechnik GmbH, Sulzbach/Saar, DE;
Abstract
A method produces a connection interface in a tubular filter element for filtering liquids, including a filter mat (). The opposite ends () of the filter mat are interconnected in a connection position by a planar weld seam () provided with an embossed strip in the region of the free ends () of the filter mat. A region is provided between the embossed weld seam () and the beginning of the transition towards the tubular filter mats, in which a smooth weld seam () is applied without embossing in a flat strip along the ends () of the filter mat. This arrangement enables the ends of the filter mat to be welded together in a strong and long-lasting manner. The embossed weld seam is simultaneously unloaded of any stress by the smooth weld seam.