Vacuum package tester and method
US4478070A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Nov 10, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/363
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vacuum package tester is capable of providing data by which the internal pressure and volume of residual gas of a flexible wall vacuum package exposed to atmospheric pressure may be calculated. A container partially filled with liquid is surrounded by a deformation-absorbing enclosure. A vacuum pump reduces the pressure in the head space above the liquid, thereby causing a submerged package to expand. Pressure gauges record the respective pressures in the head space when the package expands by first and second known volumes. From this data, the internal pressure and volume of residual gas of said package, when exposed to ambient pressure and temperature, may be calculated. In use, the invention also performs an improved method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.