Slider for slide fastener

Abstract

A slider for a slide fastener is constituted by three members including a body, a pull tab and a cover for pull tab attachment, a concave fitting groove capable of accommodating the lower end face of the cover is provided on the upper surface of the body, a welding projection to be protruded outward is provided in a part of the surface of the lower end face of the cover or a part of the bottom face of the fitting groove, and the welding projection is welded integrally by ultrasonic processing in a state in which the body formed of a resin and the cover are caused to come in contact with each other by pressure such that a fused resin does not overflow from the fitting groove to an external surface, resulting in the fabrication of a slider which can prevent a fused and solidified lump from being formed and can make a good appearance.

What is claimed is:  
     
         1 . A slider for a slide fastener, comprising: 
 a body of a slider; and    a cover for pull tab attachment which is provided on an upper surface of the body,    wherein a fitting groove for accommodating a lower end face of the cover is provided on the upper surface of the body, and    wherein a welding projection is protruded from a part of one of a surface of the lower end face and a bottom face of the fitting groove, and    wherein the body and the cover are welded integrally.    
     
     
         2 . The slider for a slide fastener according to  claim 1 , wherein a plurality of welding projections is formed to be protruded at a predetermined interval.  
     
     
         3 . The slider for a slide fastener according to  claim 1 , wherein the welding projection is formed to be continuously protruded.  
     
     
         4 . The slider for a slide fastener according to  claim 1 , wherein the welding projection is provided on one of the lower end face of a side wall of the cover and the bottom face of the fitting groove of the body which is opposed to the lower end face of the side wall of the cover.  
     
     
         5 . The slider for a slide fastener according to  claim 1 , wherein the welding projection is formed to take a square cross section.  
     
     
         6 . The slider for a slide fastener according to  claim 1 , wherein the welding projection is formed to take a triangular cross section.  
     
     
         7 . The slider for a slide fastener according to  claim 1 , further comprising a pull tab mounted on the formed body in a pivotal support configuration.  
     
     
         8 . The slider for a slide fastener according to  claim 1 , wherein the welding projection is fused in order to integrally weld the body and the cover.