Tearing strip, a method of manufacturing such strip and a package provided with the tearing strip
US5039564A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jul 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A tearing strip of the delaminating type intended for attachment to opposite insides of a package. The strip has such a layer structure that, relative the inside of the package, it has a melted-together seal while internally the strip has layers which are not fully melted together. The strip comprises a central, strong layer and a first and second layer arrangement. The first layer arrangement has a well reproducable, high seal strength relative the central layer. However, the second layer arrangement is "peelable" relative the first layer arrangements or more likely internally between two layers. In contrary the second layer arrangement has a well reproducable, high sealing strength relative the inside of the package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.