Method for producing a collapse resistant polyester container for hot fill applications
US4318882A · kind A · utility
163Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Feb 20, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/905
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A collapse resistant polyester container is provided for hot fill applications employing product fill temperatures up to about 190.degree. F. (87.8.degree. C.) or more. The container has at least one region which is thermoelastically deformable inwardly after the container is hot filled and sealed to offset the pressure forces which tend to collapse the container as the contents cool and create an internal vacuum. The thermoelastic region is preferably formed in a two step molding process in which the region is formed and heat set at a first position and then reformed outwardly to a second position and cooled in that position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.