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:
Jan. 08, 1980
Filed:
Oct. 04, 1978
Applicant:
Inventors:
Joseph L Garner, Sanford, MI (US);
Edwin L Wittbrodt, Auburn, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05C / ; B05C / ; H01J / ; G01N / ;
U.S. Cl.
CPC ...
118712 ; 250577 ; 356381 ;
Abstract
An apparatus and method are disclosed for measuring the amounts of a coating material on an applicator roll. A beam of light is projected so that only a first portion thereof is intercepted by the coating material on the applicator roll. At least a fraction of the remaining light portion passes through an aperture defined by a slotted shield member and the coated roll surface, said fraction varying with the thickness of said material on the roll surface, and detector means disposed to measure said variable fraction.