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:
Nov. 10, 2015
Filed:
Mar. 13, 2008
Heiko Manstein, Speyer, DE;
Robert Groten, Sundhofen, FR;
Anthony Hollingsworth, Birkenau, DE;
Ingrid Ewald, Hirschberg, DE;
Joachim Hendler, Weinheim, DE;
Klaus Veeser, Weinheim, DE;
Heiko Manstein, Speyer, DE;
Robert Groten, Sundhofen, FR;
Anthony Hollingsworth, Birkenau, DE;
Ingrid Ewald, Hirschberg, DE;
Joachim Hendler, Weinheim, DE;
Klaus Veeser, Weinheim, DE;
CARL FREUDENBERG KG, Weinheim, DE;
Abstract
The invention relates to a multi-layer composite for use in an air filter, comprising at least one upstream ply and a support ply that is connected to the upstream ply. The upstream ply is made of a non-woven fabric and has a finer porosity than the support ply. The aim of the invention is to form and further develop a multi-layer composite for use in an air filter, in particular in a filter bag in such a manner that the upstream ply can be connected in a stable and economical manner to the support ply. The invention is characterised in that the upstream ply is embodied as a spun bonded non-woven, the continuous filaments of which are at least partially twisted or interwoven with the support ply.