Slide fastener

Abstract

The invention provides a side fastener comprising a fastener element in which a metallic coating layer is formed, the metallic coating layer being never scraped by a sliding of a slider. In a coil-shaped fastener element made of synthetic resin, a metallic coating layer is formed on the surface of a leg portion except an inverted portion and a coupling head with which a guide flange and a guide post of a slider come into contact. Therefore, no metallic coating layer is formed on a portion with which the guide flange and guide post of the slider come into contact. As a result, such an event that the metallic coating layer is scraped and that metallic powder is scattered is prevented, so that a fastener element having a beautiful metallic gloss can be used for a long term and a cheap, fashionable slide fastener is obtained. This invention can be applied to zigzag type, injection molded type and metal type fastener elements.

What is claimed is (US):  
     
         1 . A slide fastener having a pair of fastener stringers to which fastener elements are attached along facing edge portions of a pair of fastener tapes in the longitudinal direction and a slider which is slidable along the fastener elements and can couple or separate the fastener elements, wherein a metallic coating layer is formed on a top surface of a fastener element except an outer side face thereof in contact with a guide flange of the slider.  
     
     
         2 . A slide fastener comprising a fastener element for slide fastener according to    claim 1   , wherein the metallic coating layer is formed on the top surface of the fastener element except an outer side face of a coupling head in contact with a guide post of the slider.  
     
     
         3 . A slide fastener comprising a fastener element for slide fastener according to    claim 1   , wherein the fastener element is formed of coil-shaped fastener elements formed by winding synthetic resin monofilament in the shape of coil.  
     
     
         4 . A slide fastener comprising a fastener element for slide fastener according to    claim 1   , wherein the fastener element is formed of zigzag-shaped fastener elements formed by bending synthetic resin monofilament in the shape of zigzag.  
     
     
         5 . A slide fastener comprising a fastener element for slide fastener according to    claim 1   , wherein the fastener element is formed of injection-molded single-unit fastener elements formed by injection molding synthetic resin.  
     
     
         6 . A slide fastener comprising a fastener element for slide fastener according to    claim 1   , wherein the fastener element is formed of single-unit metallic fastener elements formed by shearing or die-casting metal.  
     
     
         7 . A slide fastener according to    claim 1   , wherein the fastener element is sewed to a side edge of a fastener tape with sewing yarn.  
     
     
         8 . A slide fastener according to    claim 1   , wherein the fastener element is woven into a side edge of the fastener tape with weaving yarn.  
     
     
         9 . A slide fastener according to    claim 1   , wherein the fastener element is knitted into a side edge of the fastener tape with warp knitting yarn.  
     
     
         10 . A slide fastener according to    claim 1   , wherein the sewing yarn, weaving yarn and warp knitting yarn to be disposed on top of the fastener element for fixing the fastener element onto the fastener tape is formed of a transparent yarn or a yarn having a color similar to that of the metallic coating layer.  
     
     
         11 . A slide fastener according to    claim 1   , wherein the slider is formed by die-casting or injection molding using metal or synthetic resin.  
     
     
         12 . A slide fastener according to    claim 1   , wherein the fastener element is formed of colorless transparent material.