Thin zipper

Abstract

A thin zipper includes two sets of coil zippers fastened to two base cloths. Each coil zipper includes a plurality of teeth and at least one core wire threading through the teeth and coupling the teeth in series. Each tooth includes a bracing section, two bent sections extended from two distal ends of the bracing section and a surface section. The bracing section has a bracing inner edge on an inner side to brace the core wire. Each bent section has a latch portion engaged with another latch portion of a different tooth. The surface section is located between the two bent sections and has a packing inner edge formed on an inner side to compress the core wire to generate deformation. The bracing inner edge and packing inner edge form an inner space between them at an interval smaller than the diameter of the core wire.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a thin zipper and particularly to a teeth structure for coil zippers.BACKGROUND OF THE INVENTION[0002]Zippers are widely used on daily life to temporarily couple two flexible elements together, and are mostly employed on clothes, leather goods or other textile products. Based on structures, they mainly can be categorized into coil form and individual form. The coil zippers have many advantages, such as simpler and easier fabrication, lower costs and the like, thus are widely adopted on garment manufacture. The coil zippers are generally formed by crimping polyester filaments, hence also are called polyester zippers. Moreover, they were usually made of nylon in the past, thus also are called nylon zippers.[0003]Various techniques of zippers have been proposed in prior arts, such as R.O.C. patent No. M359953 entitled “Improved zipper tape” which discloses a zipper tape including elongated contiguous teeth and a strip fastene...

AI Technical Summary

Benefits of technology

[0007]With the core wire compressed by the packing inner edge and bracing inner edge, the core wire is fixed firmly to avoid deviation, thus the lifespan of the zipper is longer. Moreover, by compressing the core wire, total thickness of the zipper can be reduced. Hence the compressed core wire of the invention can provide positioning effect superior to the conventional zipper, thus can achieve the same positioning effect with fewer core wires to reduce the material costs.

Problems solved by technology

If too much deviation of the core wires takes place, the bracing forces on certain area of the coil teeth could be diminished significantly and result in deformation of the teeth, thus the lifespan of the zipper suffers.

While such an approach increases the bracing force for the teeth, fabrication is more difficult, material cost increases, production yield decreases and flexibility of the zipper also suffers.

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