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:
Oct. 16, 2001
Filed:
Sep. 10, 1999
YKK Corporation, Tokyo, JP;
Abstract
The present invention provides an apparatus for manufacturing a slide fastener spiral continuous element row wherein a monofilament is carried on a mandrel while ensuring an accurate pitch of elements even in a high-speed operation and a stepped form of an upper leg portion can be accurately formed at a predetermined portion of each the element. In order to continuously manufacture the slide fastener spiral element row from the continuous monofilament made of synthetic resin, the monofilament transferred continuously is wound spirally around the mandrel and carried while being retained between screw grooves of opposed screws. Then, a coupling head is formed by hitting a portion of the spiral monofilament carried on the mandrel by a pressing roller, the portion corresponding to the coupling head. After that, a stepped upper leg portion is formed by pressing a portion of the spiral monofilament by a rotary hammer at a predetermined position on the mandrel, the portion corresponding to the upper leg portion.