Closure for containers
US3987921A · kind A · utility
20Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Apr 8, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A twist closure or screw-type cap is disclosed. The closure which has internal threading is for fitting onto a container having external threading. In one embodiment the uppermost thread turn of the internal threading of the cap terminates a distance spaced from the crown plate of the cap. In a further embodiment the cap is provided with a stopper which projects into and seals the opening of a container when the closure is positioned on the container, and characterized in that at least one beadlike enlargement is provided on the threading of the cap and/or container in the region of the beginning of thread commencement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.