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:
Aug. 03, 2010
Filed:
Sep. 26, 2005
Jayshree Seth, Woodbury, MN (US);
Ronald W. Ausen, St. Paul, MN (US);
Janet A. Venne, Roseville, MN (US);
Jayshree Seth, Woodbury, MN (US);
Ronald W. Ausen, St. Paul, MN (US);
Janet A. Venne, Roseville, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present invention provides a method for forming preferably a unitary polymeric hook fastener comprising a flexible backing, and a multiplicity of spaced hook members projecting from the upper surface of the unitary backing wherein each hook member comprises a multiplicity of hook head elements projecting in substantially the same direction. The hook members each comprise a stem portion attached at one end to the backing, and a head portion at the end of the stem portion opposite the backing. The head portion can also extend from a side of a stem portion or be omitted entirely to form alternative projections which can be other forms than a hook member. The head portion preferably projects past the stem portion on at least one of two opposite sides. At least the hook head portions have two or more hook head elements on at least one of the two opposing sides of the stem. The hook head portions preferably have been heat treated so as to decrease the hook head thickness and thereby reducing or eliminating molecular orientation in at least the hook head in the machine direction.