Process for producing stretch blow formed plastic containers
US6315939A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | May 14, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/015
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Stretch blow molded containers are made from a preform made of a plastic material suitable for stretch blow molding such as, e.g., PET. The preform is heated to a temperature suitable for stretch blow molding and is introduced into a mold. An explosive gas mixture is introduced into the preform with a stretching pressure and the preform is axially stretched with the help of a stretching rod. After stretching, the explosive gas mixture is ignited, the explosion creating a blowing pressure which presses the wall of the preform against the inner wall of the mold so as to impart to the container its definite form. Due to the temperature shock generated by the explosion, the inner surface of the container is simultaneously sterilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.