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:
Feb. 01, 1977
Filed:
Jun. 12, 1975
Applicant:
Inventor:
John J Howarth, Monte Sereno, CA (US);
Assignee:
Measurex Corporation, Cupertino, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; G01N / ;
U.S. Cl.
CPC ...
250339 ; 250341 ; 356 51 ;
Abstract
An improved method and apparatus for measuring the moisture contained by a moving sheet of web material includes a water simulating filter in a typical dual wavelength moisture gauge which provides transmission ratios. The relationship between the change of ratios of various samples of the material with different moisture content with the change of the filter ratios when various layers of moist dirt are placed in the gauge transmission path is used to provide a corrected transmission ratio from which water weight can easily be determined. The method is also applicable to polymer coatings or similar substances.