Method of testing a package seal
US4747299A · kind A · utility
29Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1987 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Oct 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/363
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of testing the integrity of a package seal (14) provided between a container portion (11) and a lid portion (12), includes the steps of: initially reducing the pressure acting on the outer surface of the container portion to cause the lid portion to bow inwardly to a position of substantially maximum concavity while maintaining the ullage volume within the package substantially constant; further reducing the pressure acting on the outer surface of the container portion to distend the container portion for increasing the volume of the ullage space; and sensing for a change in position of the distended container wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.