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:
Feb. 26, 1985
Filed:
Apr. 06, 1983
Applicant:
Inventors:
Assignee:
Yoshida Kogyo K. K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B28B / ;
U.S. Cl.
CPC ...
425391 ; 425319 ; 425393 ;
Abstract
A coupling element shaper comprises a pair of parallel externally threaded screw members corotatable in a common direction and disposed on opposite sides of a mandrel along which a core thread is fed while a filamentary material is wound around the mandrel into a row of helically coiled coupling elements. Each screw member has a portion varying in pitch to gradually reduce in a direction from one end to the opposite end thereof. The core thread is squeezed by the coupling elements as shaped by such portion so as to have a certain degree of stretchability which can cancel or take out its shrinkage when the coupling elements are sewn to a slide fastener stringer tape.