Process and apparatus for identifying articles of sheet material by means of microwaves
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United States of America Patent
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Jan 21, 1986
Grant Date -
N/A
app pub date -
Apr 8, 1983
filing date -
Jul 29, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for the identification by microwaves of a sheet article composed of an electrically non-conductive material, the article being marked for identification by the incorporation therein of electrically conductive fibers. The apparatus comprises: at least two microwave emitter devices one adjacent the other; detectors of waves reflected by the article when advanced before said devices; a screen placed in front of at least one of the emitters; and, regulating means for raising the sensitivity of the identification signals by setting the distances between the emitter device, screen and support for the interposed article.
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