Dispensing closure utilizing a sealing element supported by a washer spring
US4219138A · kind A · utility
22Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Oct 16, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/305
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dispensing closure can be constructed utilizing a washer spring around an opening through the cap of such a closure so as to resiliently bias a sealing surface carried by the washer spring against the spout of such a closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.