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:
Sep. 20, 2005
Filed:
Jun. 20, 2002
Rudi Widt, Cologne, DE;
Rudi Widt, Cologne, DE;
Inficon GmbH, , DE;
Abstract
The invention relates to a method for operating a film leak indicator () comprising two films (), which are each tensioned inside a frame () and which delimit a testing space () when a test piece () is introduced. In addition, said film leak indicator is equipped with two vacuum pumps (). According to the invention, the testing space () is firstly evacuated and the film leak indicator is switched over to a leak search mode after the evacuation is completed. In order to prevent the search for leaks from being impaired by fluctuating helium concentrations in the ambient air, the invention provides that, before starting the leak search process, the helium concentration of the ambient air is measured and this measurement is taken into account during subsequent leakage measurements.