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. 02, 2001
Filed:
Apr. 20, 2000
Applicant:
Inventor:
Hannu Moisio, Kangasala, FI;
Assignee:
Metso Paper Automation Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 2/946 ;
U.S. Cl.
CPC ...
B01J 2/946 ;
Abstract
The invention relates to a method and apparatus for measuring paper color. Paper color is measured from the surface of a paper roll on a winder. As the size of the paper roll grows, a measuring device is moved in such a way that the angle between the measuring device and the surface of the paper roll is kept substantially constant and, at the same time, the distance of the measuring device from the surface of the paper roll remains substantially constant