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AssigneePPG Industries, Inc.
InventorsKenneth L. Furst, Robert O. Dilmore, Milan D. Janic, Bozidar Stipanovic
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Described is apparatus and a method for measuring the integrity of coated paper, which apparatus comprises, a reservoir for a test liquid, e.g., water, retaining means for holding a sample of coated paper which is in liquid communication with the test liquid reservoir, means for applying ultrasonic energy to the sample of coated paper, photoelectric means for continuously measuring the turbidity of the test liquid, the photoelectric means being in liquid communication with the test liquid reservoir and the paper sample, recording means electrically connected to the photoelectric means for continuously recording the turbidity measurements, and means, including pumping means, for circulating test liquid between the reservoir, photoelectric means and paper sample retaining device.
Apparatus for measuring the integrity of a paper coating comprising, in combination, a reservoir for a test liquid, means for retaining a sample of coated paper, said retaining means being separate from but in liquid communication with said test liquid reservoir, means for applying ultrasonic energy to the sample of coated paper, photoelectric means for continuously measuring the turbidity of the test liquid, said photoelectric means being in liquid communication with said reservoir and said sample retaining means, recording means electronically connected to said photoelectric means for continuously recording said turbidity measurements, and means, including pumping means, for circulating test liquid between said reservoir, said photoelectric means, and said paper sample retaining means.
A method for measuring the integrity of a paper coating on a sample of coated paper, which comprises, in combination, the steps of:
Dependencies are inferred from the claim text.