A method of checking the volume of containers is disclosed according to which a gas is fed into a volume which is correlated to the volume of the respective container and a signal which depends from the fed amount of gas is evaluated as signal indicative of the volume of the container. In order to substantially...http://www.google.de/patents/US5760294?utm_source=gb-gplus-sharePatent US5760294 - Method of and apparatus for checking the volume of containers
