Patents by Inventor Pertti Soikkanen

Pertti Soikkanen 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: 4144124
    Abstract: A machine for manufacturing paper, such as tissue paper, includes a twin-wire former made up of a rotary forming roll and a pair of endless fabrics, each of which may be a wire or felt, lapped around the rotary forming roll to provide twin-wire web formation therewith. At the location where these endless fabrics travel beyond the forming roll they diverge from each other to define between themselves a diverging space where one of the endless fabrics has an upwardly directed surface on which the web is carried beyond the forming roll. This latter endless fabric carries the web to a press section where this latter endless fabric travels with the web through a first press nip of the press section defined between an inner press roll situated within the loop of the latter endless fabric and an outer press roll situated outside of the latter loop.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: March 13, 1979
    Assignee: Valmet Oy
    Inventors: Risto Turunen, Pertti Soikkanen, Martti Koponen
  • Patent number: 4056433
    Abstract: A paper machine wherein a pick-up roll or felt are eliminated. A pair of endless fabrics and forming rolls cooperating therewith provide with the pair of endless fabrics an ascending twin-wire former and in advance of the twin-wire former a single-wire former. One of these endless fabrics has an upper run extending laterally from the twin-wire former and carries the web formed at the twin-wire former beyond the latter on an upper surface of this upper run. A pair of press rolls include lower and upper press rolls which define a first press nip through which the above upper run travels together with an endless felt which is lapped around the upper press roll so that this endless felt and the above upper run are sandwiched between the press rolls with the web travelling beyond the first press nip together with the endless felt around part of the upper press roll.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: November 1, 1977
    Assignee: Valmet Oy
    Inventors: Martti Koponen, Pertti Soikkanen