Method of automatic manufacture of closed, internally sterile hollow bodies
US4026982A · kind A · utility
13Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Feb 26, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2791/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The process of the invention essentially consists in supplying sterile gas to an extruded parison confined between the two shells of a mould, this sterile gas being sequentially applied at a first pressure slightly higher than atmospheric pressure, at a second pressure much higher than the first pressure in order to inflate the parison, and at a third pressure which is much lower than the second pressure and corresponds to the desired inflating pressure of the hollow body to be formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.