Hermetically sealed package tester
US4803868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/363
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for testing flexible sealed packages of the type wherein the package is at least partially made of a flexible, electrically conductive foil or metallic laminate wherein the capacitance between the flexible conductive foil or metallic laminated of the package and a fixed electrode is measured when the package is subjected externally to a partial vacuum. The apparatus includes an evacuable chamber adapted to support a package under test therewithin so that at least part of the flexible foil or metallic laminate portion of the package lies opposite said fixed electrode and a means for monitoring the capacitance between the electrode and that part of the foil or metallic laminate when the chamber is evacuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.