Patent ID: 6439033
Filing Date: 2002-08-27
Classification: B65B,G01M,G08B,Y10T

Abstract:
A method for producing a closed and filled container comprising:filling a container with a material comprising at least one liquid component; sealingly closing the container; and leak testing the container, wherein the leak testing includes applying a pressure difference across at least a part of a wall of the container, which part is to be leak tested, by evacuating the surrounding of the container to a pressure value at least according to vapor pressure of the at least one liquid component; monitoring the pressure in the surrounding as a leak indicative signal; comparing a signal derived from the pressure monitored with a dynamic threshold value for identifying leak condition of the container and enabling a further signal derived from the pressure monitored to be averaged with similar further signals of other containers previously tested as unleaky if the identifying of the container now under test reveals an unleaky container and further deriving the threshold value from the result of the averaging.