Patent TW-201803482-A (TW)
Title: Reverse mother-kid type nylon zipper characterized by having the advantages of simple structure, uniform force, low cost, good safety and excellent anti-theft performance
Inventor: WANG LIEN-CHOU
IPC: A44B19/40
Filed: 2016-07-19
Abstract: Disclosed are a reverse mother-kid type nylon zipper and a sewing method thereof, which has the advantages of simple structure, uniform force, lower cost, good safety and excellent anti-theft performance. The reverse mother-kid type nylon zipper includes: upper teeth are sewn to form an upper-layered zipper tape on the bottom faces of the upper-layered left and right zipper cloths respectively; the lower-layered left and right zipper cloths are respectively sewn on the bottom faces of the upper-layered left and right zipper cloths; and the lower-layered zipper teeth are respectively sewn on the bottom faces of the lower-layered left and right zipper cloths to form a lower-layered zipper tape. Wherein, the lower-layered zipper teeth is smaller than the upper-layered zipper teeth so as to form a double-layered mother-kid type zipper having a large upper-layer and a small lower-layer. The upper-layered zipper tape and the lower-layered zipper tape use integrated double-layered zipper slider to open and close. The double-layered mother-kid type zipper connects to the double-layered zipper slider in a manner of reverse connection. The double-layered zipper slider includes an upper-layered zipper slider for opening or closing the upper-layered zipper tape, and a lower-layered zipper slider disposed at the bottom faces of the upper-layered zipper slider for opening or closing the lower-layered zipper tape. Wherein, the symmetry center of the upper-layered zipper slider is aligned with that of the lower-layered zipper slider. The upper-layered zipper slider includes an upper-layered top board and an upper-layered bottom board. The rear end between the upper-layered top board and the upper-layered bottom board has a connection via an upper columniation. Two sides of the front end of the upper-layered bottom board are respectively equipped with a top side-guard so as to form an upper-layered chamber. The lower-layered top board is connected to the bottom face of the rear end of the upper-layered bottom board. The lower-layered top board uses a lower columniation to connect the lower-layered bottom board. Two sides of the front end of the lower-layered bottom board are respectively equipped with the bottom side-guard so as to form a lower-layered chamber. Wherein, the upper-layered chamber is larger than the lower-layered chamber. Two top side-guards of the engaged end of the zipper and the bottom side-guard form a bell shaped mouth so as to allow the double-layered mother-kid type zipper to enter into the double-layered zipper slider to provide a smooth guide function. The sewing method of the reverse mother-kid type nylon zipper includes: the stitch of the upper-layered zipper tape precisely aligning with the stitch of the lower-layered zipper tape before sewing the upper-layered zipper tape and the lower-layered zipper tape, using the hot melt film or glue to adhere the sewing position of two sides of the upper-layered and the lower-layered zipper teeth in advance so as to fix the alignment of the stitch of the upper-layered zipper tape and the stitch of the lower-layered zipper tape.