Patents by Inventor Robert Havukainen

Robert Havukainen 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).

  • Publication number: 20060118257
    Abstract: A paper web (W) is dried in a forward dryer section (D) of a paper machine in downward open drying groups (G1 . . . G6) that apply single-wire draw. Then, in a finishing section the web (W) is surface-sized in a surface-sizing unit (20) and dried mainly by contact-free drying: partly by airbone web-dryers (31, 32, 34, 36) or by impingement drying. The power of the airbone web-drying/impingement drying is regulated on both sides of the web (W) such that the tendency of curling created in the web (W) in the forward dryer section (D) can be controlled.
    Type: Application
    Filed: May 5, 2004
    Publication date: June 8, 2006
    Inventors: Pasi Rajala, Robert Havukainen, Ville Korhonen, Seppo Elijoki, Pasi Ahonen, Kari Juppi, Pasi Kekko, Martti Salminen