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. 13, 2001
Filed:
Oct. 15, 1999
YKK Corporation, Tokyo, JP;
Abstract
A core cord is inserted into coil-shaped fastener elements made of thermoplastic resin, and the fastener elements are sewn onto a fastener tape by multi-thread chain stitch. Yarn mainly made of thermally meltable synthetic fiber is used for looper thread of multi-thread chain stitch, while yarn of fiber which is not or less meltable is used for needle thread. Entangling points of the looper thread and the needle thread are disposed on the core cord. The looper thread is thermally melted to form melted portions where the looper thread and the needle thread entangle with each other at the entangling points. As a result, melted portions which have become monofilamentary are formed on the fastener elements or no sewing yarn is on the fastener elements due to thermal melting. Thus, there is no fear of cutting of the sewing yarn due to sliding of a slider and the slide fastener is abrasive resistant. The coil-shaped fastener elements is firmly attached to the fastener tape by using such thermally meltable looper thread.