Easy-open shrouded slider-zipper assembly for reclosable bag
US7322920B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 2004 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/8131
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A reclosable package comprises a pre-made bag with a post-applied shrouded slider-zipper assembly installed in the mouth of the bag. The bag material comprises a layer made of paper and a layer of thermoplastic material laminated to the paper layer. The shrouded slider-zipper assembly comprises a pair of flanged zipper parts made of thermoplastic material, a slider mounted to the zipper, and a folded web of thermoplastic film material joined to the layer of thermoplastic material of the bag. The flanges of the zipper parts are respectively joined to opposing sides of the folded web. The package is made by an automated process whereby an individual shrouded slider-zipper assembly is cut from a continuous chain of assemblies, inserted into the open mouth of a pre-made bag and tack sealed in place. The assembly is then fully sealed to the bag by a drag sealer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.