Coating processes – Measuring – testing – or indicating
Patent
1991-08-29
1993-03-02
Beck, Shrive
Coating processes
Measuring, testing, or indicating
427 9, 427 10, 427420, 118688, 118324, 118DIG4, B05D 130, B05C 1100, B05C 500
Patent
active
051907895
ABSTRACT:
A method and apparatus for coating a surface of a continuously moving substrate with a continuously flowing curtain of coating composition comprises transmitting a sound or light wave toward the curtain and detecting the sound or light wave after the transmitting of the sound or light wave. The presence of the curtain is confirmed by either a positive receiving of a reflected sound or light on the smae side of the curtain as the transmitting of the sound or light wave, or a negative receiving of the transmitted sound or light wave on the other side of the curtain. The position of a continuously flowing curtain of coating composition is determined by measuring a time lapse between the time a sound or light wave is transmitted and the time a sound or light wave after reflection from the curtain is received. If the time lapse is outside a predetermined range of a control time period, a signal is generated to indicate that the curtain is defective.
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Brochure for "Model M-4000-Ultrasonic Measurement & Control System", Massa Products Corp., 280 Lincoln Street, Hingham, Mass. 02043-1796.
Brochure for "Model E-201A/215-Ultrasonic Ranging Module", Massa Products Corp., 280 Lincoln Street, Hingham, Mass. 02043.
Brochure for "Ultrasonic Proximity Sensors and Systems", L-Tron Associates, 20 N. Main Street, Pittsford, N.Y. 14534.
Bareford Katherine A.
Beck Shrive
Eastman Kodak Company
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