Method and apparatus for measuring the distribution of fiber widths and adjusting the refining of fibrous stock
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United States of America Patent
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Sep 8, 1987
Grant Date -
N/A
app pub date -
Oct 21, 1985
filing date -
Oct 25, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for making paper by refining fibrous stock. The stock is passed through an adjustable refining means and a sample of the refined stock is analyzed using a fibre fineness distribution analyzer to produce, over a range of fibre widths, counts of the number of fibres in the sample which have a selected fibre width. Fibre width is plotted against fibre count at intervals of 1 .mu.m over the range of from 7 .mu.m to 64 .mu.m to obtain a fibre fineness distribution curve. The fibre fineness distribution curve is compared with a reference fibre fineness distribution curve obtained by the prior analysis of stock known to have produced paper of desired quality. The refining means is then adjusted to produce a stock the analysis of which produces a distribution curve substantially the same as the reference curve.
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