Sealant layer for container lid
US6302321A · kind A · utility
60Cited by
29References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Oct 11, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2577/205
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sealed composite container for products is provided having a paperboard body ply with a liner ply adhered on the inner surface thereof. One end of the container is rolled outwardly to form a rim and exposing the inner surface of the liner ply. A lid is heat sealed to the rim of the container. The dual-layer sealant composition layer of the lid comprises a base layer, such as high density polyethylene, and an adjacent frangible layer, such as ethylene-methyl acrylate copolymer, the frangible layer being operatively positioned for heat sealing to the rim of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.