Vented closure
US4382521A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Jul 17, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/1688
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A thermoplastic closure suitable for fitment to a threaded container neck is disclosed. The closure has a top wall with an annular sidewall depending therefrom. To provide a gas-tight seal between the closure and the container, there is provided a gas-tight sealing system above the closure thread. About the inside surface of the annular sidewall is an extended closure thread which, due to its extent, requires the user to make two turning motions to achieve removal of the closure from the container. By requiring two turning motions, sufficient time is provided for venting of any pressurized gas from the container to the atmosphere. This venting can be facilitated by the utilization of any conventional venting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.