Opening arrangement for packing containers with pressurized contents
US4522305A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1982 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Aug 23, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D75/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Opening arrangements for packing containers which are manufactured from a flexible material and intended for pressurized contents, e.g. beer, are sometimes in the form of a tear-off cover strip which is sealed to the packing container wall and covers a pouring opening punched out in the same. In order to withstand the high internal pressure which is caused by the contents, the seal between the cover strip and the packing material must be strong, which detrimentally affects the openability of the packing container. By ensuring that the mutual bond between the different layers in the packing laminate is weaker than the seal between the cover strip and the outer layer of the container material, a readily opening packing container is provided, in spite of the seal between the cover strip and the packing laminate being of a strength such that the risk of leakage or unintentional opening is small. By sealing the cover strip in a zone extending around the pouring opening which zone is at some distance from the actual pouring opening and by providing the pouring opening with a "set in" pouring edge, the properties of the opening arrangement are optimized further without increasing the risk…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.