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Gravimetric blender with operatively coupled bar code reader

Image Number 4 for United States Patent #6188936.

A method for weight blending of granular materials comprises at a remote site generating a command for desired operation of granular material weight blending apparatus; encoding said command into transportable time-stable machine readable tangible storage media; transporting said media to a bar code reader operatively connected to said granular material weight blending apparatus; scanning the tangible media having the command encoded thereon to read the command; and providing the read command as input to a in microprocessor operatively connected to said granular material weight blending apparatus for regulating operation of the same.

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