Ykk Corporation

Teruo Ozaki

Shoji Matsui

Futoshi Kozato

Katsuo Satake

Makoto Yoshida

A metallic engaging element of vintage type having a pair of leg portions formed so as to branch to right and left sections from the bottom of a body portion of the engaging element. The leg portions are formed into an L-like sectional shape including a sheet-like nipping portion and a leg portion side wall. The sheet-like nipping portion has a notch portion for sandwiching one side edge portion of a fastener tape from the front and rear surfaces. At least one projecting portion is formed in each of leg portion inner wall surfaces opposing the one side edge portion of the fastener tape in the leg portion side wall.

Slide fastener engaging element and slide fastener

A metallic slide fastener element in which an exposed portion outside of an element is finished uniformly with a high smoothness and the fixing strength to a fastener tape is intensified, and a method for effectively manufacturing the same element, wherein a metallic flat type wire rod is placed on a die and the flat type wire rod is punched out with a punch so as to produce a slide fastener element, and at this time, a mouth on a punch side of the die or a peripheral edge of the die is chamfered at a radius of 0.01 to 1.0 mm and a clearance between the punch and the die is set to 0 to 30 &#x3bc;m, so that an element, which has a cut surface comprising a shear surface of 80% or more and a fracture surface of less than 20% and is suitable as a slide fastener to be attached to a high quality product, is obtained.

Growing community of inventors

Toyama-ken, Japan

Teruo Ozaki