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. 03, 1981
Filed:
Jul. 10, 1979
Applicant:
Inventor:
Helmut Wulz, Birmensdorf, DE;
Assignee:
Optilon W. Erich Heilmann GmbH, Cham, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A44B / ;
U.S. Cl.
CPC ...
2420 / ; 2420 / ; 2420 / ;
Abstract
A slide fastener comprising a pair of tapes and respective rows of slide-fastener elements individually secured to the tapes. The slide-fastener elements are each bent over an edge of the tape and welded together thermally or ultrasonically. The arms of the fastener elements are formed along their lateral surfaces or sides with grooves of increasing depth toward the respective tape and weft yarns, interwoven with the warp of the tape, are provided along the edge and are disposed in the grooves to provide torsional stability for the individual coupling elements.