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:
May. 24, 2011
Filed:
Jul. 31, 2006
Andrew R. Fox, Oakdale, MN (US);
John D. Stelter, St. Joseph Township, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
William T. Fay, Woodbury, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Douglas C. Sundet, Hudson, WI (US);
Andrew R. Fox, Oakdale, MN (US);
John D. Stelter, St. Joseph Township, WI (US);
Seyed A. Angadjivand, Woodbury, MN (US);
William T. Fay, Woodbury, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Douglas C. Sundet, Hudson, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A pleated filter is made from a monocomponent monolayer nonwoven web of continuous monocomponent meltspun partially crystalline and partially amorphous oriented fibers of the same polymeric composition that are bonded to form a coherent and handleable web having a Gurley Stiffness of at least 100 mg and which further may be softened while retaining orientation and fiber structure. Rows of pleats are formed in the nonwoven web, and the web is cut to a desired size and shape to provide a pleated filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers, adhesive or other reinforcement in the filter media layer.