초록 ▼

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 mechanical

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.

대표청구항 ▼

A method for detecting a leak in a defective seal of a package having an edge seal that is formed by a bond between overlapping edge portions of walls of said package, one said wall having a flexible portion that changes shape as the volume in said package changes, one said wall being a flexible lid

A method for detecting a leak in a defective seal of a package having an edge seal that is formed by a bond between overlapping edge portions of walls of said package, one said wall having a flexible portion that changes shape as the volume in said package changes, one said wall being a flexible lid of said package, said method comprising providing said package, applying a gas to exposed outer edges of said edge portions and along the outer surface of said lid at sufficiently high velocity to lift said lid at a gross leak in said seal and inject said gas through said gross leak into said container, and detecting deflection of said flexible portion in response to flow of gas through a leak in said edge seal between said overlapping edge portions.