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:
Jun. 26, 2007
Filed:
Jul. 09, 2004
Dean R. Duffy, Woodbury, MN (US);
Donald E. Young, Forest Lake, MN (US);
Lowell E. Christensen, Lake Elmo, MN (US);
Douglas C. Sundet, Hudson, WI (US);
Dean R. Duffy, Woodbury, MN (US);
Donald E. Young, Forest Lake, MN (US);
Lowell E. Christensen, Lake Elmo, MN (US);
Douglas C. Sundet, Hudson, WI (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The method of forming pleated filter media includes providing a generally planar web of filter material, folding the web to form a pleated web having a plurality of fold lines, arranging the plurality of pleats in a first spaced configuration defined by a first distance between adjacent pleat tips, applying a continuous strand of adhesive to the web, and adjusting the arrangement of the plurality of pleats into a second spaced configuration defined by a second distance between adjacent pleat tips. The web has a front face and a rear face. Each fold line is intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines form a plurality of pleats having a first plurality of pleat tips and a second plurality of pleat valleys. The second distance is different from the first distance.