Paper making and fiber liberation – Apparatus – Measuring – testing – inspecting – indicating or illuminating
Patent
1979-01-15
1980-09-30
Bashore, S. Leon
Paper making and fiber liberation
Apparatus
Measuring, testing, inspecting, indicating or illuminating
162DIG10, 73422R, 235 92PC, 250222PC, G01N 1502, G01N 2128
Patent
active
042253853
ABSTRACT:
Relative shive incidence in a production flow line of paper pulp is continuously sampled and measured by means of a continuous flow, fiber induction device located within the production line to extract a diluted sample of fiber flow therein. The diluted sample is directed through a windowed conduit section for photodetection of particles therein. Particle caused pulses are discriminated by amplitude relative to a reference scale to distinguish shive particles from acceptable fiber particles. Two pulse trains are developed simultaneously: one pulse train for shive pulses and the other pulse train for particle flow including shives. Both pulse trains are rate determined by counting the number of pulses in a fixed interim of time identical to both. The two pulse rates are then combined to develop a dimensionless ratio of shive incidence or percentage within the total fiber stream.
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Johnson et al.; "International Mechanical Pulping Conference 1973;" Stockholm, Sweden, (6-1973).
Hill et al.; "Evaluations of Screens by Optical Measurements," Tappi; vol. 58, No. 10, pp. 120-124, (10-1975).
Hughes, Jr. Horatio
Schilling Robert A.
Alvo Steve
Bashore S. Leon
Marcontell W. Allen
Schmalz Richard L.
Westvaco Corporation
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