Plastic closure with compression molded sealing/barrier liner
US7021478B1 · kind B1 · utility
17Cited by
23References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Apr 27, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/565
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic closure includes a closure shell having a base wall and a peripheral skirt, and a sealing liner disposed on the base wall of the closure. The sealing liner includes an outer sealing layer of resilient resin secured to the base wall within the skirt, and an inner layer of barrier resin underlying the sealing layer. The base wall and the sealing layer have opposed flat surfaces, one of which has a pocket in which the barrier resin layer is disposed. The sealing layer has a periphery that extends beyond the periphery of the barrier resin layer, so that the sealing layer completely overlies and covers the barrier layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.