Patents by Inventor Hannamari Härkönen

Hannamari Härkönen 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 and device changing the vapor pressure inside the paper web in calendering
    Patent number: 6779440
    Abstract: In the method for calendering a paper or paperboard web, the properties of a paper or paperboard web (W) are modified by changing the vapour pressure inside a moist paper or paperboard web. The device for calendering a paper or paperboard web comprises means for changing the vapour pressure inside the moist paper or paperboard web (W).
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: August 24, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Koivukunnas Pekka, Hannamari Härkönen, Risto Talja