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. 25, 2024
Filed:
Jun. 17, 2020
Sartorius Stedim Fmt Sas, Aubagne, FR;
Laurent Thenard, Plan d'Aups Sainte Baume, FR;
Bastien Cattaux, Aubagne, FR;
Marc Hogreve, Adelebsen, DE;
Mandip Nachhattar, Bobigny, FR;
Delphine Philippeau, Marseilles, FR;
Tomasz Urbaniak, Göttingen, DE;
SARTORIUS STEDIM FMT SAS, Aubagne, FR;
Abstract
Integrity of a flexible bag is verified by a testing system, using helium to detect existence of a possible hole. The bag is preliminary placed in vacuum chamber of a fluid-tightly isolated enclosure. After connecting a port of the bag to a helium feeding pipe and after pre-pressurizing the bag with nitrogen, a test is performed in a vacuum suction mode for a detection area outside the bag in the enclosure. Before starting the test phase, the bag is additionally filled with an amount of helium. A detection detects information representative of helium partial pressure in the internal volume, to allow detection of helium escaping from the bag, by analysis of a helium partial pressure drop. A small amount of nitrogen is sufficient to decrease leak rate mean value, so that uncertainty regarding integrity of some bags decreases.