Plastic container with reinforcing ring in the base
US4955491A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | May 1, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2949/0715
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic container having a reinforcing ring in its base to strengthen the base. The ring reinforces the base to prevent deformation of the base which would result in an unstable container and also reduces the potential for stress cracking found in one-piece containers having reinforcing ribs in the base structure. The reinforcing ring has a weight that is less than the weight of a typical base cup used to provide a supporting surface for a two-piece composite bottle. The ring is attached to the base portion of the container by one of three methods: molding the reinforcing ring into the base; providing a ring and a base which snap fit together, or adhesively bonding the ring to the base of the container. When the contianer is filled with a carbonated beverage, the pressure within the container acts to maintain the ring in an assembly relation with the container base in which the ring reinforces the base and acts to maintain the structural integrity of the base by resisting eversion of the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.