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:
Mar. 12, 2002
Filed:
Apr. 08, 1999
Markus Nothhelfer, Kerpen, DE;
Ingo Seckel, Bruhl, DE;
Leybold Vakuum GmbH, , DE;
Abstract
A process is disclosed for testing the tightness of a package ( ) containing a packaged object ( ) and in which a test gas is contained; leak testing is performed in such a manner that the packaged object ( ) is introduced into a test chamber formed by two extensible foils ( ) and where the space between the foils ( ), in which the packaged object is contained, is evacuated in such a manner that the foils ( ) can wrap the packaged object ( ); at least in the areas of their surfaces which face the packaged object ( ) and in which the tightness of the package ( ) is to be inspected, the foils ( ) are provided with means ( ) which form a coherent intermediate space ( ) over the areas to be inspected of the package ( ); the intermediate space ( ) is evacuated down to a pressure lower than the pressure within the package ( ); the evacuated intermediate space ( ) is connected to a detector ( ) sensitive to the test gas to determine if test gas escapes outwards through the inspected area of the package ( ).