Zip fastener with augmented indication

Abstract

A zip fastener consisting of two zipper tapes, two series of interlocking teeth and a zipper slider is disclosed. Each interlocking tooth includes a front engagement end piece and a rear extension end piece respectively extended from a tooth body thereof in reversed direction. The rear extension end piece provides a track for supporting and guiding sliding movement of the zipper slider and an augmented portion that exhibits a visual indication.

What the invention claimed is: 
     
         1 . A zip fastener, comprising two zipper tapes, two series of interlocking teeth respectively affixed to said zipper tapes, and a zipper slider coupled to said two series of interlocking teeth and movable by an external force to lock and unlock said two series of interlocking teeth, wherein:
 each said interlocking tooth comprising a tooth body defining a front side and an opposing rear side, a front engagement end piece forwardly extended from said front side of said tooth body and a rear extension end piece backwardly extended from said rear side of said tooth body, said rear extension end piece comprising a track for supporting and guiding sliding movement of said zipper slider and an augmented portion that exhibits a visual indication;   said zipper slider comprising a slider body, a bottom clamping panel and a top clamping panel, said slider body comprising a center spacer block with opposing top and bottom sides thereof respectively connected to said bottom clamping panel and said top clamping panel, said bottom clamping panel comprising two opposite upright side flanges respectively upwardly extended from two opposite lateral sides thereof, said top clamping panel comprising two opposite flat side wing portions, said flat side wing portions of said top clamping panel and said upright side flanges of said bottom clamping panel defining therebetween an extended open space.   
     
     
         2 . The zip fastener as claimed in  claim 1 , wherein said track of said rear extension end piece of each said interlocking tooth comprises a smooth track base with a reduced thickness, an upright sliding support wall located at one lateral side of said smooth track base and formed integral with the said rear side of the associating said tooth body, and a L-shaped space defined between said smooth track base and said upright sliding support wall; said upright side flanges of said bottom clamping panel of said zipper slider are movable in said L-shaped space for direct contact with said smooth track base and said upright sliding support wall of said track of said rear extension end piece of each said interlocking tooth. 
     
     
         3 . The zip fastener as claimed in  claim 1 , wherein said augmented portion of said rear extension end piece of each said interlocking tooth is selectively made in the form of a geometric figure, figure, symbol or alphabetic word. 
     
     
         4 . The zip fastener as claimed in  claim 1 , wherein the thickness of said augmented portion of said rear extension end piece of each said interlocking tooth is approximately one half of the thickness of the said tooth body of each said interlocking tooth.