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Title: Detecting small holes in packages

A package containing a tracer gas, and a method for determining the presence of a hole in the package by sensing the presence of the gas outside the package. The preferred tracer gas, especially for food packaging, is sulfur hexafluoride. A quantity of the gas is added to the package and the package is closed. The concentration of the gas in the atmosphere outside the package is measured and compared to a predetermined value of the concentration of the gas in the absence of the package. A measured concentration greater than the predetermined value indicates the presence of a hole in the package. Measuring may be done in a chamber having a lower pressure than that in the package.
 [1];  [1]
  1. (Aiken, SC)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5499529
Contract Number:
Research Org:
Country of Publication:
United States
detecting; holes; packages; package; containing; tracer; gas; method; determining; presence; sensing; outside; preferred; especially; food; packaging; sulfur; hexafluoride; quantity; added; closed; concentration; atmosphere; measured; compared; predetermined; value; absence; indicates; measuring; chamber; pressure; tracer gas; sulfur hexafluoride; predetermined value; atmosphere outside; package containing; /73/

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