Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
Patent
1980-10-14
1982-08-03
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With testing, sampling or analyzing
73 61R, 162 55, 162198, 162263, 209208, D21F 706, G01N 2100
Patent
active
043426182
ABSTRACT:
A method and an apparatus for determining the fibre length distribution by weight of a pulp and a method and apparatus for determining absolute consistency are disclosed.
The fibre length distribution is obtained by dividing the flow of a pulp sample into two separate flows, fractionating each of the flows by a screen into a retained and a through fraction, the screens being of different mesh sizes, measuring the amounts of each of a selected one of said retained or through fractions and determining, based on the cumulative normal distribution relationship of cumulative retained fraction in % of feed to fibre length, the fibre length distribution of the pulp sample.
REFERENCES:
patent: 3802964 (1974-04-01), Forgacs et al.
Karnis et al., "Mechanical Pulp Mill Control Systems, I. The Measurement of Fibre Length" presented at Canadian Pulp & Paper Assoc. Jun. 1971.
Tusman, "The Fiber Length of Bauer-McNett Screen Factors", TAPPI, vol. 55, No. 1, Jan. 1972.
"Fiber Length of Pulp by Classification", TAPPIStandard T2330575,1975.
Karnis Alkibiadis
Shallhorn Paul M.
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