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:
Mar. 03, 1986
Filed:
Jan. 09, 1983
Applicant:
Inventors:
John R Wagner, Greensboro, NC (US);
Werner P Kirschstein, Greensboro, NC (US);
Floyd S Cowan, Sutherland, VA (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B07B / ;
U.S. Cl.
CPC ...
209237 ; 209289 ; 131312 ;
Abstract
Tobacco is graded by size by separating a sample into size fractions using a rotary drum screen. The sample is characterized by two distribution curves, one for a finer portion and the other for a coarser portion. The crossing point of logarithmic plots of the percentage by weight vs. particle size distributions of the two portions provides a precise and sensitive descriptor, which can be termed as a 'percent desirable fraction,' for grading the size characteristics of threshed or cut tobacco.