Testing container seals
US4934180A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Oct 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/366
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Leak detector for use in detecting defective flange-shaped seals between lid and body portions of a package. A pressure chamber is provided for isolating the external edge of the seal and applying test pressure thereto. Containment of the pressure chamber includes sealing pressure applied mechanically to the flange-shaped package seal during testing, but this sealing pressure does not affect seal testing because it is appropriately limited by a self-compensating biasing of the mechanical seal. Also disclosed is a leak testing method that involves directing gas over a flexible lid at sufficiently high velocity to lift the lid at gross defects in a seal and inject gas through the gross defects. Also disclosed is a package design that employs channels to direct gas into a seal region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.