Patents by Inventor Ari Ämmälä

Ari Ämmälä has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for controlling screening by measuring flow amount consistency of the pulp
    Patent number: 7077930
    Abstract: The invention relates to a method of controlling quality of pulp. Pulp formed in mechanical defibering of wood is screened into at least two fractions, the accept that has passed the screening phase being forwarded for further use and the reject that did not pass the screening being removed from the screening phase. The invention comprises determining flow amount and consistency of the pulp supplied to the screening phase and, correspondingly, of the reject removed therefrom, and calculating a passage ratio of the reject and the supplied pulp by means of the flow amounts and consistency values verified through the measurement, and adjusting the screening phase according to said passage ratio.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: July 18, 2006
    Assignee: Metso Paper Inc.
    Inventors: Ari Ämmälä, Jouko Niinimäki, Tero Jussila