发明名称 |
Detecting small holes in packages |
摘要 |
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.
|
申请公布号 |
US5499529(A) |
申请公布日期 |
1996.03.19 |
申请号 |
US19930070196 |
申请日期 |
1993.06.02 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY |
发明人 |
KRONBERG, JAMES W.;CADIEUX, JAMES R. |
分类号 |
G01M3/22;(IPC1-7):G01M3/20 |
主分类号 |
G01M3/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|