Patent Number: 6,305,215

Title: Method for leak testing and leak testing apparatus

Abstract: For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapor pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.

Inventors: Lehmann; Martin (CH-5610 Wohlen, CH)


International Classification: G01M 3/32 (20060101); G08B 21/20 (20060101); G08B 21/00 (20060101); G01M 003/32 (); G01M 003/20 (); G08B 021/00 ()

Expiration Date: 10/23/2018