Optics: measuring and testing – Of light reflection
Patent
1987-06-24
1988-04-12
McGraw, Vincent P.
Optics: measuring and testing
Of light reflection
101DIG24, 356446, G01N 2147, G01N 2155
Patent
active
047370351
ABSTRACT:
In order to effect an optimum control of the rate of supply of dampening water to the surface of a plate carried by a plate cylinder of a printing machine, particularly an offset press, the amount of dampening water on the surface of the plate or the surface of a roller through which the dampening water is supplied to the plate or the surface of an additional roller contacting with the water supplying roller is measured optically. The measurement is conducted by applying parallel rays of light to the objective surface at a predetermined angle of incidence, and measuring the intensity of the mirror-reflected light reflected by the surface at the same angle as the incident light. By measuring the mirror-reflected light insteadly of diffused light, it becomes possible to enhance the accuracy of the measurement and to widen the range of measurement.
REFERENCES:
patent: 3870884 (1975-03-01), Williams
patent: 3960077 (1976-06-01), Aylett
patent: 4052937 (1977-10-01), Lawson et al.
patent: 4072426 (1978-02-01), Horn
patent: 4227809 (1980-10-01), Satoh et al.
patent: 4525630 (1985-06-01), Chapman
Aoki Ken'ichi
Ohta Asaya
McGraw Vincent P.
Sumitomo Heavy Industrie's, Ltd.
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