Post-applied zipper base with grip strip
US5092684A · kind A · utility
93Cited by
8References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/15
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for producing an improved easy-open container wherein a continuous base layer is integrally extruded with structure for gripping thereon and applied to existing film to seal perforated lines of tearing therein. Interlocking zipper elements are contemporaneously extruded and fused to the continuous base layer. Die clutter is reduced and the method produces a flexible container having desirable sealing, opening and gripping features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.