Patent Number: 8,814,972

Title: Multi-layered filter web

Abstract: A multi-layered filter web having at least one at least one filter layer bonded to at least one additional filter layer. The filter layers are bonded together by at least one of ultrasonically and matted. The bonding is in at least one of at least one knurled edge region and in at least one matting region.

Inventors: Waibel; Hans (Remseck/Aldingen, DE)

Assignee: Mahle International GmbH

International Classification: B01D 46/00 (20060101)

Expiration Date: 8/26/12018