G - Physics – 01 – N
Patent
G - Physics
01
N
341/33, 92/52, 7
G01N 21/89 (2006.01) D21C 9/00 (2006.01) D21G 9/00 (2006.01) G01N 21/94 (2006.01) G01N 33/34 (2006.01)
Patent
CA 1258898
Abstract of the Disclosure In a contaminant detector for processing paper pulp including sticky contaminants, a pulp sample is diluted to less than 0.5% consistency and passed through a concentrator from a plurality of classified samples having heavy and light particles. The inclined classified samples are again diluted to less than 0.5% consistency and passed as thin sample flow through an open channel having a light transmitting base. The flow is back lighted and a photodetector includes a linear array of sensitive elements aligned to receive the transmitted light. The sensitive elements aligned with particle creates a signal proportional to the width. By rapid sequential activation of the elements, a digital data stream is created which is processed by a microprocessor to determine the particle size and produce a plurality of contaminant relative signals related to different classified size ranges, such as heavy, medium and small contaminant particles. A particle removal includes sequential stages for succesively removing the heavy, medium and small sized contaminants, with a control for each stage. The pulp sample is taken at a highest concentration location and the contaminant related signals are connected to actuate the corresponding controls for the several stages.
503237
Carr Wayne F.
Marks & Clerk
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