Composite retortable closure
US4813561A · kind A · utility
76Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 29, 1988 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Feb 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/3428
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A closure is described for sealing retortable containers. The closure has a disc shaped metal cover with a grooved sealing portion at its outer edge containing a sealant and a plastic ring for engaging the container. A clamping action holds sealant in the cover groove against a rim of the container and the relative dimensions of the closure groove and the container are chosen for providing a tight seal particularly after retorting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.