Pressure-controlling method
US4874580A · kind A · utility
11Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B55/027
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Air-containing packages are subjected to heat sterilizing under pressure in a sterilization treatment tank. A pressure controlling method comprises changing the rate-of-rise of the temperature in the treatment tank in the vicinity of a point-of-change in a pressure rise in a pressure pattern in the package and delaying the timing of lowering the pressure in the treatment tank after the start of cooling treatment to avoid any deformation of the packages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.