Diagnosing or determining parameters for an installation for detecting open defects in the surfaces of parts by sweating
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United States of America Patent
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Jun 29, 2010
Grant Date -
May 3, 2007
app pub date -
Oct 26, 2006
filing date -
Oct 28, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of diagnosing or determining parameters for an installation for detecting open defects in the surfaces of parts by sweating, the method including passing at least one standard testpiece through the installation, the testpiece having a surface possessing at least one pattern representative of the type of defect that is to be detected, applying to the surface of the testpiece a penetrating composition including an indicator substance, washing, drying, applying to the surface of the testpiece a composition including a developer, and illuminating the surface of the testpiece to illuminate any remaining indicator substance so as to form a developed image of the or each pattern and deduce therefrom an indication about the quality of the operation of the installation. Prior to passing through the installation, the standard testpiece is subjected to preparatory treatment including immersion in a bath containing an emulsifier, a first rinse under pressure, drying, applying a developer at the location(s) of the pattern(s), and a second rinse under pressure.
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