Dispenser closure
US3972452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1975 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Oct 31, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/2025
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a dispenser closure formed of elastomeric material which is suitable for fitting to the discharge spout of a liquid container formed of a flexible film material such as polyethylene film and housed in a cardboard casing. The closure is provided with sealing means, the effectiveness of which is increased with increasing pressure within the container, and a diaphragm like transverse wall positioned across the discharge spout, said transverse wall being provided with an outwardly directed protrusion which is manipulated with a toggle like action to distort the transverse wall and sealing means to permit liquid to flow from the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.