Method for shaping closed bottom of tubular container
US4898708A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jul 21, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/78
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing thermoplastic tubular containers having a tubular wall section, open neck, and integral sealed bottom where a thermoplastic disc, is sealed to the inner wall of the tubular wall section, and the disc, while in a moldable state, is formed into a bottom wall by application of either a vacuum to the exterior surface of the disc or a fluid pressure to the interior of the tubular wall section, or both, to mold the disc in a mold cavity to a desired shape. A supporting sleeve surrounds the tubular wall section during application of the fluid pressure. Thermoplastic containers can be formed from a single thermoplastic material or from laminates, such as a laminate material containing an oxygen impermeable layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.