Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1987-07-31
1989-05-16
Fields, Carolyn F.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
2503591, G01N 2133
Patent
active
048312649
ABSTRACT:
A method for measuring the concentration of adhesive on the surface of a coating layer which has the steps of irradiating the surface of the coating layer with an ultraviolet ray of the highest peak absorption wavelength of the adhesive, ultraviolet ray of shorter wavelength and ultraviolet ray of longer wavelength, photoelectrically converting the reflected rays and further comparing to calculate them. Thus, this method can be used to measure the concentration of adhesive on the surface of a coating layer and the flat surface distribution of the adhesive by fundamentally measuring with ultraviolet rays. The method is of high reliability despite the presence of gloss or the like.
REFERENCES:
patent: 3325649 (1967-06-01), Bird
patent: 3395278 (1968-07-01), McDivitt
patent: 4542296 (1985-09-01), Kleinnibhelink et al.
Kline, "The Use of Ultraviolet Analysis of Coated Paper", 1988, Tapp; Coating Conference.
Fujiwara et al., "Ultraviolet Absorption of Styrene-Butadiene Latex on Pigment-Coated Paper", Tapp; Journal, Dec. 1987, pp. 97-100.
Fields Carolyn F.
Jujo Paper Co. Ltd.
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