Composite vessel lid
US4880127A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1989 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Mar 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/145
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Disclosed is a composite vessel lid comprising an outer lid of a plastic material to be engage with a neck of a vessel and an inner lid of a thin metal sheet held within the outer lid. Fine projections are formed at predetermined intervals in the abutting portion between the outer and inner lids, and a gas-releasing path is formed among the fine projections. Since the gas-releasing path is not formed in a portion engaging with a vessel, such as a screwed portion of the outer lid, the engaging force is not reduced and the strength of the outer lid is not reduced, and release of gas is promptly accomplished effectively at the initial stage of opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.