Method for producing containers
US4381277A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1981 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | May 18, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/258
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for providing a container with one or more layers of barrier material during the production of the container from a thermoplastic. A preform (10) is stretched in its axial direction, generally an amount corresponding to the total axial stretching required for conversion of the preform to a container, after which the stretched preform (11, 13) is provided with one or more barrier layers (12, 14), and the preform is then heated and converted to a container. In one embodiment, the axially stretched preform (15) is produced by assembling axially stretched part-preforms (13a,b) covered with one or more barrier layers. The combined preform is then converted to a container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.