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:
May. 19, 2009
Filed:
Dec. 03, 2004
Marvin R. Havens, Greer, SC (US);
Marvin R. Havens, Greer, SC (US);
Cryovac, Inc., Duncan, SC (US);
Abstract
The present invention relates to a process for detecting a leak in a package. The process comprises preparing a package by covering at least a portion of an O-sensitive product with a multilayer film comprising (i) a leak-indicator layer in which a O-sensitive indicator is present throughout the leak-indicator layer; and (ii) an O-barrier layer outward of the leak-indicator layer. A low O-environment is provided within the package. The leak-indicator layer is then illuminated with light containing a wavelength absorbed by the O-sensitive indicator, so that the O-sensitive indicator produces an emission of radiation in an amount inversely proportional to a level of Opresent with the O-sensitive indicator. Then the multilayer film is scanned while the O-sensitive indicator is emitting radiation, the scanning being carried out by sensing and comparing the amount of radiation emitted from at least two different regions of the multilayer film.