Patent ID: 6840087
Filing Date: 2005-01-11
Classification: G01M

Abstract:
1. A method for manufacturing unleaky closed containers with at least one flexible wall area comprising: moving a biasing member relatively towards and onto said wall area; stopping said moving; monitoring a biasing force on said container; sampling said biasing force monitored at a first point in time, resulting in a first force measuring signal; sampling said biasing force monitored at at least one second subsequent point in time, resulting in a second force measuring signal; generating a difference signal in dependency of said first and second measuring signals as a leak indicative signal; updating an average signal of difference signals generated during previous testing of containers with said difference signal if said container under test is unleaky and comparing said difference signal with at least one threshold signal, the at least one threshold signal being controlled in dependency of said average signal; rejecting a container indicated as leaky by said leak indicative signal.