Automatic ejector rate normalizer using multiple trip levels established in a master channel
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United States of America Patent
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Apr 18, 1995
Grant Date -
N/A
app pub date -
Jul 28, 1994
filing date -
Jul 28, 1994
priority date (Note) -
Expired
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Abstract
In a bichromatic sorting machine, a polygon pattern of trip level boundaries is established for a master channel programmable memory that is representative of orthogonally plotting detected products in each of two reflectivity spectral bands. The rate of products passing through the master channel that is rejected as being non-acceptable by producing a reflectivity value outside of the polygon pattern compared to total products sorted is used as the basis for normalizing all channel results. When the actual rate in the master channel varies from the desired rate, the boundaries of its polygon are concentrically adjusted back to the desired rate, thereby also adjusting the similar polygon patterns for each of the other or slave channels. Multiple machines can also be normalized to the same rate in similar fashion. The master channel or the master machine can be selectable, a concept that is also applicable to monochromatic sorting machines, as well.
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