Dangerous goods closure system
US5954220A · kind A · utility
Inventor
Key dates
| Filing date | Nov 5, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Nov 5, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00972
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A closure system for open headed containers utilizing a thermoplastic closure of the type having a disk and skirt depending therefrom the skirt portion including an annular ring adjacent its lower extremity adapted to lie beneath and radially inwardly with respect to an outwardly directed annular protrusion on a complementary container; a weakened stress relieving annular portion on the skirt lying immediately above said annular ring; the annular weakened portion having a wall thickness sized to ensure that stress relief and attendant creep in the thermoplastic material of the closure after affixation of the closure to the container occurs substantially at the annular weakened portion thereby allowing the lower portions of the annular ring to move radially inwardly; the wall thickness of the annular weakened portion at all times being of adequate thickness to resist premature rupture in the event that the closure/container unit is subjected to an impact; seal means between the closure and the container above the annular ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.