Method for checking the sealing of a package and apparatus for measuring viscosity
US5872309A · kind A · utility
7Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for checking the sealing of a package, which includes a base part and a cover. A vibratory component is enclosed in a cavity in a gas of defined viscosity. Upon penetration from outside of a gas of different viscosity, the viscosity in the cavity, and thus also the vibratory properties of the vibratory element, are influenced. The sealing of the package can thus be checked at any time. The vibratory element can also be used generally to measure viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.