Patents by Inventor Pekka Haapanen

Pekka Haapanen 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).

  • Patent number: 5792260
    Abstract: The invention concerns a method for two-sided coating of a printing-paper web with a coating paste or equivalent. In the method, the paper web is passed through the coating part of the paper machine, in which the first side of the web is coated in the first coating station of said coating part, and the coating-agent layer produced on the face of the web is dried at least partly by means of a first drying unit. The second side of the web is coated in the second coating station of the coating part, and the second coating-agent layer produced on the face of the web is dried at least partly by means of a second drying unit.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: August 11, 1998
    Assignee: Valmet Corporation
    Inventors: Rauno Rantanen, Pekka Haapanen
  • Patent number: 4721266
    Abstract: The present invention relates to a continuously running rewinder with a pressure roller for winding a paper web, for instance, from a supercalender onto a reel-up drum. The rewinder comprises roll stands, which are provided with a primary drive for rotating a rewinding reel-up drum, a pressure roller assembly including the pressure roller via which the web is routed to pass before entering the rewinding reel-up drum and which can be actuated to swing from an open position to a closed position toward the roll stands so that the pressure roller assembly is pressed against the rewinding reel-up drum to form with it a nip for the web. The rewinder includes a pressing bar, whose path of movement is adapted to pass between the pressure roller and the rewinding reel-up drum and via which the web is routed to pass so that when the bar is in its lower position and the pressure roller assembly in its open position the bar holds the web at a lower level than that of the nip.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: January 26, 1988
    Assignee: Oy Wartsila Ab
    Inventors: Pekka Haapanen, Harri Kuosa, Ari Bjorkman, Rauno Hagel, Ari Lassila