Method and apparatus for detecting overlapping products in a singulated product stream
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United States of America Patent
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-
Sep 19, 1995
Issued Date -
N/A
app pub date -
Sep 12, 1994
filing date -
Apr 6, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A singulated stream of products comprised of both single and overlapping products is transported through a scanning zone along a transport path. Each single or overlapping product defines a shadow on the transport path that is analyzed to determine the presence of product multiples in the product shadow by measuring the width and length of the product shadow. If the length of the product shadow exceeds by more than a predetermined amount the average length of previously measured shadows having a similar width, the shadow likely contains two or more overlapping products. As the product shadow moves through the scanning zone, each product included therein is scanned for affixed bar codes by a plurality of bar code scanners. If two different bar codes or two identical bar codes from mutually exclusive scanners are recorded for a single product shadow, then the shadow likely contains two or more overlapping products.
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