The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1994
Filed:
Apr. 29, 1993
Kenneth L Furst, Appleton, WI (US);
Robert O Dilmore, Ross Township, Allegheny County, PA (US);
Milan D Janic, Columbus, OH (US);
Bozidar Stipanovic, Lake Forest, IL (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
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.