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:
Oct. 21, 1997
Filed:
Apr. 17, 1996
Applicant:
Inventor:
Ernest A Graff, Ontario, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73159 ; 73862391 ;
Abstract
A method and apparatus for determining the flatness of a sheet material, and for determining the lateral alignment stability of a web or sheet material. The method for determining the flatness of a sheet material includes subjecting a portion of the sheet material disposed between two rollers to a longitudinal tension insufficient to remove internal compressive strains in the longitudinal direction, sensing by non-contact means the distance from a reference plane to the sheet material, and determining a cross-sectional profile of the portion.