Zipper tape for a bag and method of producing the same
US7077570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Jul 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T24/45168
- WIPO fieldHandling
- WIPO sectorMechanical engineering
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 al…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.