Measuring the percentage or fractional moisture content of paper

Details Measuring the percentage or fractional moisture content of paper Measuring the percentage or fractional moisture content of paper

1984-01-20

1986-03-18

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, G01J 100

Patent

active

045771049

ABSTRACT:
The moisture in paper is measured using a first set of infrared radiation wavelengths that have about the same absorption coefficients for the fiber constitutent of the paper but have substantially different absorption coefficients for the moisture contained in the paper, and a second set of infrared wavelengths that have about the same absorption coefficients for the moisture contained in the paper but have substantially different absorption coefficients for the fiber constituent, both sets of infrared radiation wavelengths being affected to about the same extent by a variable scattering characteristic of the fiber and are also affected to about the same extent by the variable amount of a broadband absorber such as carbon in the paper.

REFERENCES:
patent: 3405268 (1968-10-01), Brunton
patent: 3551678 (1970-12-01), Mitchell
patent: 3793524 (1974-02-01), Howarth
patent: 3851174 (1974-11-01), Dahlin
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patent: 4171918 (1979-10-01), Mactaggart
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patent: 4306151 (1981-12-01), Chase
patent: 4345150 (1982-08-01), Yamura et al.
patent: 4363968 (1982-12-01), McGowan et al.
Brunton, D. C., "Measurement of Moisture in the Paper Industry," Southern Pulp and Paper Manufacturer, May 10, 1967, pp. 108, 109, 114, 116 and 117.

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