Closure for containers
US7775389B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Mar 17, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/36
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A closure for a container is injection moulded from plastics material and comprises (a) a body 61 that has a top wall 5 that has a central opening 7 and (h) a cap 9 that closes the opening 7 when the closure in an operative position on the container. The closure also comprises a region of reduced wall thickness 11 that defines a fracture line that facilitates separation of the cap from the closure. The cap 9 has two diametrically opposed inwardly projecting tabs 23 that cause a greater amount of post-moulding shrinkage than the adjacent parts of the cap after injection moulding of the closure. Consequently, the tabs 23 place a section of the region of reduced wall thickness that in alone to the tabs 23 in tension whereby this section preferentially fractures when a person applies force to separate the cap from the closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.