Zipper tape for a bag and method of producing the same

Details Zipper tape for a bag and method of producing the same Zipper tape for a bag and method of producing the same

2006-07-18

2006-07-18

Pascua, Jes F. (Department: 3727)

Flexible bags

With closure

Rib and groove

C024S585120

Reexamination Certificate

active

07077570

ABSTRACT:
A zipper tape is provided which can freely be used regardless of whether the zipper tape is made from a polypropylene-based resin or a polyethylene-based resin and also on which letters can be printed or any color can be given thereto. A method of producing the zipper tape with high productivity by means of extruding male strips and female strips in rows in a batch is provided. The zipper tape (2) with the mating section (3) (the male strip (3a) and the female strip (3b)) formed thereon has a three-layered structure comprising the heat-insulating film (6) as an intermediate layer, the thermally fused film (7) thermally fused and bonded to one side of the heat-insulating film (6) of the bag (5), and the thermally fused film (8) for formation of a mating section bonded to another side of the bag (5). The male strips (3a) and female strip (3b) for forming a mating section together are extruded from the miscellaneous extrusion molding machine (101) onto a surface of the thermally fused film (8) for forming a mating section in rows in the state where adjoining male and female strips form pairs respectively and are thermally fused and bonded to the base tape. Then the base tape is cut along each strip with the adjoining male strip (3a) and female strip (3b) mated with each other to form the mating section (3), and is wound up to provide a product. Letters, marks, or colors are printed on or given to the mating sections (102) and (104) on the base tapes (101) and (103) respectively.

REFERENCES:
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patent: 5335997 (1994-08-01), Kanemitsu et al.
patent: 5700091 (1997-12-01), Tanaka et al.
patent: 6092931 (2000-07-01), Tilman
patent: 6152601 (2000-11-01), Johnson
patent: 6808666 (2004-10-01), Fukumori et al.
patent: 1908600 (1991-04-01), None

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