Oscillating grip strip for recloseable plastic bags and method and apparatus for making the same
US5259904A · kind A · utility
109Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S24/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic bag with a recloseable zipper-type closure is formed with grip strips on its lips to ease the opening of the bags. The grip strips are extruded from a grip strip extruder which is moved relative to a movement of the zipper type profile to produce a regularly repeating pattern. The strips facilitate opening the bag even with wet or oily fingers. A method and apparatus for forming the same is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.