Patent ID: 6557395
Filing Date: 2003-05-06
Classification: G01M

Abstract:
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; sampling said biasing force monitored at a further point in time, resulting in a further force measuring signal and updating an average signal of further force measuring signals sampled during previous testings of unleaky containers with said further force measuring signal, if said leak indicative signal indicates an unleaky container and generating said difference signal in dependency of said averaging signal; rejecting a container indicated as leaky by said leak indicative signal.