The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2013
Filed:
Jun. 15, 2010
Martin Lehmann, Wohlen, CH;
Martin Lehmann, Wohlen, CH;
Wilco AG, Wohlen, CH;
Abstract
For leak testing closed containers () which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity () which is evacuated at least down to vapor pressure of that liquid component. The pressure in the surrounding of the container () and thus within test cavity () is monitored. Monitoring is performed by a vacuum pressure sensor (), whereas lowering pressure surrounding the container () is performed by a vacuum pump (). 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.