Flat bottom resin zipper
AssigneeKcc Zipper Co., Ltd.
InventorChun-Yen Chung
Life of this patent
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Abstract
The invention discloses a flat bottom resin zipper, which injects resin chain teeth onto a core wire or a chain cloth. Each resin chain tooth has a sewing thread slot on the top and a chain cloth embedding groove on the bottom. Then sew the entire resin chain teeth to the chain cloth, so that the sewing threads are tightened in the sewing thread slots, and the chain cloth is embedded in the chain cloth embedding grooves, forming a double fixed structure of injection molding and sewing thread sewing. Afterwards, the inner side of the chain cloth is folded back to form a flat bottom zipper with only the chain cloth on one side of the zipper without any protruding resin chain tooth, which can be used as an anti-pinch zipper or an invisible zipper.
Claims10
A flat bottom resin zipper comprising two zipper tapes, each said zipper tape comprising a chain cloth, a chain tooth bar and a plurality of sewing threads wherein:
- said chain tooth bar comprises a core wire and a plurality of resin chain teeth injection molded on said core wire, each said resin chain tooth comprising a rectangular block, a through hole connecting two opposite sides of said rectangular block, a chain tooth head formed at one end of said rectangular block and a sewing thread slot recessed from a top of said rectangular block to a bottom of said rectangular block, said sewing thread slot extending to said two opposite sides of said rectangular block;
- when said resin chain teeth are injection molded, said core wire is formed to pass through the through hole of each said resin chain tooth, so that said resin chain teeth are arranged at intervals on said core wire, said chain tooth bar being set on said chain cloth so that a lower side of said rectangular block fits on a second surface of said chain cloth;
- said sewing threads are wound in said sewing thread slot of each said resin chain tooth, said sewing threads being sewn on said chain cloth between each said resin chain tooth, and each said resin chain tooth being fixed on the said second surface of said chain cloth;
- and
- an inner side of said chain cloth is folded toward an outer side of said chain cloth to form a chain tooth belt and a sliding space between said chain tooth belt and said chain cloth, said chain tooth bar being located on the side of said chain tooth belt opposite said sliding space to hide said resin chain teeth on one side of said chain cloth.
A flat bottom resin zipper comprising two zipper tapes, each said zipper tape comprising a chain cloth, a chain tooth bar and a plurality of sewing threads, wherein:
- said chain tooth bar is pre-injection molded on an inner side of said chain cloth with a plurality of resin chain teeth, each said resin chain tooth comprising a rectangular block, a cloth groove recessed laterally from one end of said rectangular block toward an opposite end of said rectangular block, a chain tooth head formed at one end of said rectangular block, a sewing thread slot recessed from a top of said rectangular block to a bottom of said rectangular block and a chain cloth embedding groove recessed from the bottom of said rectangular block toward the top of said rectangular block, said sewing thread slot and said chain cloth embedding groove respectively extending to two opposite sides of said rectangular block;
- when said resin chain teeth are injection molded, an inner side of said chain cloth is clamped in said cloth groove of each said resin chain tooth, so that said resin chain teeth are arranged at intervals on the inner side of said chain cloth;
- said sewing threads are wound in said sewing thread slot and said chain cloth embedding groove of each said resin chain tooth, and said sewing threads are sewn to said chain cloth at the gap between each two adjacent said resin chain teeth;
- and an inner side of said chain cloth is folded toward an outer side of said chain cloth to form a chain tooth belt and a sliding space between said chain tooth belt and said chain cloth, said chain tooth bar being located on the side of said chain tooth belt opposite said sliding space to hide said resin chain teeth on one side of said chain cloth.
Dependencies are inferred from the claim text.