Method for molding multi-layered vessels
US4774047A · kind A · utility
14Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1986 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Dec 12, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming a multi-layered vessel by injection molding a multi-layered parison and subsequently blow-molding the parison to form the multi-layered vessel. The parison is formed having inner and outer wall layers and an intermediate gas barrier layer. The intermediate layer is positioned between the inner and outer wall layers such that the ratio of the wall thickness of the outer layer to that of the inner layer is most preferably in the range of 1:3.50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.