07534615 is referenced by 49 patents and cites 60 patents.

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 O2-sensitive product with a multilayer film comprising (i) a leak-indicator layer in which a O2-sensitive indicator is present throughout the leak-indicator layer; and (ii) an O2-barrier layer outward of the leak-indicator layer. A low O2-environment is provided within the package. The leak-indicator layer is then illuminated with light containing a wavelength absorbed by the O2-sensitive indicator, so that the O2-sensitive indicator produces an emission of radiation in an amount inversely proportional to a level of O2 present with the O2-sensitive indicator. Then the multilayer film is scanned while the O2-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.

Title
Process for detecting leaks in sealed packages
Application Number
11/3175
Publication Number
7534615 (B2)
Application Date
December 3, 2004
Publication Date
May 19, 2009
Inventor
Marvin R Havens
Greer
SC, US
Agent
Rupert B Hurley Jr
Assignee
Cryovac
SC, US
IPC
G01N 31/22
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