The method concerns a method for determination of roll density, wherein the density of the wound roll is determined in connection with the web reel. The method uses the known relation between the length (l), diameter (D), basis weight (b) and density () of the wound roll. formula (I). In the method,...http://www.google.com/patents/US20040154391?utm_source=gb-gplus-sharePatent US20040154391 - Method for determination of roll density
