Waterproof dual-track zipper

Abstract

A waterproof dual-track zipper includes two zipper tapes of the same structure, each zipper tape including a tape body, a mating strip integrally formed with one lateral side of the tape body and a sealing structure located on one side of the mating strip, the sealing structure including a male engaging member and a female engaging member, a first close-ft portion connected between the male and female engaging members and a second close-fit portion at an opposite lateral side of the male engaging member, and a zipper slider coupled between the two zipper tapes and movable to force the male engaging member of one zipper tape into engagement with the female engaging member of the other zipper tape and to abut the first and second close-fit portions of one zipper tape be against hook flanges of the female engaging member of the other zipper tape, achieving excellent waterproofing effects.

What is claimed is: 
     
         1 . A waterproof dual-track zipper, comprising a first zipper tape, a second zipper tape, and a zipper slider coupled between said first zipper tape and said second zipper tape and slidable in two reverse directions to close said first zipper tape and said second zipper tape in one direction and to open said first zipper tape and said second zipper tape in the other direction, said first zipper tape and said second zipper tape having one same structure, wherein:
 said first zipper tape and said second zipper tape each comprise a tape body, a mating strip integrally formed with one lateral side of said tape body, and a sealing structure located on one side of said mating strip, said sealing structure comprising a female engaging member, a male engaging member disposed in a parallel manner at one lateral side relative to said female engaging member, a first close-fit portion connected between said female engaging member and said male engaging member, and a second close-fit portion disposed at an opposite side of said male engaging member, said female engaging member comprising an engagement groove inwardly curved in one side of said mating strip and two hook flanges respectively disposed at two opposite lateral sides of said engagement groove, said male engaging member comprising a long rib and a neck connected between said long rib and said mating strip;   the long rib of the male engaging member of said first zipper tape is engageable into the engagement groove of the female engaging member of said second zipper tape, enabling the two hook flanges of the female engaging member of said second zipper tape to be hooked on the neck of the male engaging member of said first zipper tape and the first close-fit portion and the second close-fit portion of said first zipper tape to be abutted against the surfaces of the two hook flanges of the female engaging member of said second zipper tape; and   the long rib of the male engaging member of said second zipper tape is engageable into the engagement groove of the female engaging member of said first zipper tape, enabling the two hook flanges of the female engaging member of said first zipper tape to be hooked on the neck of the male engaging member of said second zipper tape and the first close-fit portion and the second close-fit portion of said second zipper tape to be abutted against the surfaces of the two hook flanges of the female engaging member of said first zipper tape.   
     
     
         2 . The waterproof dual-track zipper as claimed in  claim 1 , wherein the second close-fit portions of the sealing structures of said first zipper tape and said second zipper tape have a predetermined length that allows respective end edges of the second close-fit portions of the sealing structures to be kept in contact with the tape bodies of said first zipper tape and said second zipper tape and to cover over one respective said hook flange. 
     
     
         3 . The waterproof dual-track zipper as claimed in  claim 2 , further comprising a waterproof pocket affixed to one end of said first zipper tape and one corresponding end of said second zipper tape, said pocket defining an opening in one side thereof facing toward said zipper slider for enabling said zipper slider to pass therethrough into the inside of said waterproof pocket when said zipper slide is moved to close said first zipper tape and said second zipper tape. 
     
     
         4 . The waterproof dual-track zipper as claimed in  claim 3 , wherein said first zipper tape and said second zipper tape each have one end thereof bonded together by thermal fusion to form a first press-bonding part. 
     
     
         5 . The waterproof dual-track zipper as claimed in  claim 4 , wherein said first zipper tape and said second zipper tape each have an opposite end thereof bonded together by thermal fusion to form a second press-bonding part. 
     
     
         6 . The waterproof dual-track zipper as claimed in  claim 4 , wherein said first zipper tape and said second zipper tape are one-piece members respectively made out of a plastic material. 
     
     
         7 . The waterproof dual-track zipper as claimed in  claim 5 , wherein said first zipper tape and said second zipper tape are one-piece members respectively made out of a plastic material.