Method of making a coupling element for a slide fastener
AssigneeYoshida Kogyo K.K.
InventorHiroshi Yoshida
Life of this patent
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Abstract
A method of making a slide fastener coupling element from a blank metal web having a longitudinally extending central portion and a pair of transversely tapered marginal portions integral one with each side of the central portion. A projection for intercoupling with another coupling element is formed by drawing a limited area portion of the web central portion out of the plane thereof and away from one surface thereof. The web is then stamped out to form a coupling element having a head portion including the projecton and formed of the central portion of the web, and a pair of tape edge clamping legs each integral with the head portion and formed of one of the marginal portions of the web.
Claims1
A mathod of making a coupling element for a slide fastener having a pair of element-carrying tapes, the coupling element being mounted on either one of the pair of tapes, comprising the steps of:
- providing a blank metal web having a central portion extending longitudinally thereof and a pair of marginal portions integral one with each side of said central portion, each of said marginal portions being transversely tapered toward said central portion;
- drawing a limited area portion of said central portion out of the plane thereof away from its one surface to form a projection for intercoupling engagement with a coupling element on the other tape;
- and stamping out said metal web to form a coupling element having a head portion including said projection and formed of said central portion and a pair of tape edge clamping legs each integral with said head portion and formed of one of said pair of marginal portion.
Dependencies are inferred from the claim text.