Colorimetric apparatus for continuous control of impurities on h

Details Colorimetric apparatus for continuous control of impurities on h Colorimetric apparatus for continuous control of impurities on h

1991-02-05

1992-09-22

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Automatic analytical monitor and control of industrial process

422 681, 422 8205, 436 52, 436 55, 436100, 436131, 436164, 198636, 198633, 198810, G01N 2100

Patent

active

051495023

ABSTRACT:
An apparatus for automatic, quantitiative determination of an impurity contained in a product with an uneven upper surface travelling in bulk on a conveyor belt. The apparatus includes a leveling system including a half-cylinder formed of a plastic sheet, and having an arcuate surface downwardly directed toward the belt with the cylinder axis perpendicular to the direction of the belt and having a length which is less than the width of the belt. The half-cylinder is fixed to a frame attached to a lever arm which is in equilibrium about a horizontal shaft. A jack is provided for adjusting the lever arm and enabling the arcuate surface of the half-cylinder to be brought into contact with product travelling on the belt, the jack having a head connected to the lever arm so as to enable the lever arm to oscillate as the leveling device follows variations of the thickness of product travelling on the belt. The apparatus also includes a system for spraying a liquid reagent onto levelled product, a system for measuring the color intensity of the levelled product sprayed by the reagent, a program system for controlling, at predetermined intervals, the adjusting of the lever arm, the spraying of the reagent and the measuring of the color intensity, and a system for determining the quantity of impurity in the product based upon the measured color intensity.

REFERENCES:
patent: 3856474 (1974-12-01), Pittman et al.
patent: 3992109 (1976-11-01), Bock
patent: 4010857 (1977-03-01), Reim et al.
patent: 4029197 (1977-06-01), Clarke et al.
patent: 4279338 (1981-07-01), Sekora
patent: 4562059 (1985-12-01), Asaoka et al.
Patent Abstracts of Japan, vol. 13, No. 511 (P-961 ) (3859) Nov. 16, 1989.

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