Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Patent
1990-04-17
1992-04-14
Alvo, Steve
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
162253, 162254, 162263, D21F 706, D21F 900, D21F 1100
Patent
active
051044889
ABSTRACT:
A system and process for continuously determining the strength of paper sheet material during manufacture includes a plurality of sensors for detecting proxies related to properties such as the strength of individual fibers, length distribution of fibers, quantity of fibers, distribution of fibers, orientation of fibers, number of bonds between fibers, and bond strength of fibers. For a given papermaking machine and paper type, multiple regression analysis is used to determine correlations between the measured proxies and laboratory tests of paper strength. Then, during operation of a papermaking machine, changes in the proxy measures are used to indicate paper strength and to adjust operation of the papermaking machine based upon changes in the strength of sheet material being produced.
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"The Application of X-Ray Absorption and Fluorescence Analysis to the Measurement of Paper Additives", by Alexander Buchnea, et al., 2211 Int'l Journal of Applied Radiation and Isotopes, vol. 33, Apr. 4, pp. 285-292 Oxford, Great-Britain.
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U.S. Patent Application Ser. No. 06/730,406 as most recently amended on Mar. 2, 1988.
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Ekstrom et al., "Automating the Control Loops On a Swedish Kraft Paper Machine"; Pulp & Paper, Apr. 3, 1967.
Alvo Steve
Measurex Corporation
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