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. 29, 1985
Filed:
Oct. 25, 1982
Applicant:
Inventors:
Benny L Hester, Winston-Salem, NC (US);
William F Fleming, III, Winston-Salem, NC (US);
Assignee:
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 38 ; 73 377 ;
Abstract
The permeability of a moving web, for example, of perforated cigarette tipping paper, is monitored by inducing a fluid flow across the web, measuring the pressure drop across the web, independently measuring the volumetric flow rate, and calculating the permeability in CORESTA units. This method is embodied in apparatus which sequentially measures the instantaneous permeability of successive areas on the web to provide direct indication of the instantaneous CORESTA permeability.