Testing of properties in flowable materials
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United States of America Patent
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Sep 15, 1998
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method of testing a property of a flowable substance. In particular this invention relates to the testing of the cross-linkability of an adhesive and is particularly relevant to an in-line process for mounting electronic components upon a printed circuit board. In the process, infrared light is passed through adhesive being fed to a dispensing position. Some of the light is absorbed by chemicals in the adhesive. Unabsorbed light after passing through the adhesive is analyzed and wavelengths of the light relating to cross-linkable materials in adhesive are monitored.
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