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. 31, 1983
Filed:
Aug. 10, 1981
Applicant:
Inventor:
Kiyoshi Takeshima, Namerikawa, JP;
Assignee:
Yoshida Kogyo K. K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264167 ; 264261 ; 2643288 ; 26432811 ; 26432812 ; 425545 ; 425572 ; 425575 ; 4253 / ; 425814 ;
Abstract
A continuous zigzag-shaped coupling element strip, for use in the production of slide fasteners, is produced on a rotating die wheel having an endless zigzag-shaped peripheral cavity receptive of heated thermoplastic material delivered from a fixed extrusion nozzle. The cavity has a plurality of bottlenecks or retarding means to restrict or retard the flow of the delivered thermoplastic material in the cavity so as to retain much of the thermoplastic material in central and transverse cavity portions that correspond to head and leg portions of a coupling element.