Patents by Inventor Ismo Lehmus

Ismo Lehmus 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).

  • Apparatus for forming a paper or cardboard web
    Patent number: 7150808
    Abstract: An apparatus for forming a paper or cardboard web from a fibrous suspension, said apparatus having a twin wire section consisting of a first wire loop formed by a first wire, a second wire loop formed by a second wire and at least one headbox, from which headbox the fibrous suspension can be fed into the space between the wire loops, said first wire loop being provided with a dewatering box placed above the wire and arranged to drain water from the fibrous suspension between the wire loops via the bottom of the dewatering box and through the first wire, said apparatus having two successive dewatering zones provided in the area of the dewatering box, where the direction of web movement in the area of the first dewatering zone is away from the dewatering box and the runs of each wire loop are substantially straight while in the area of the second dewatering zone the direction of web movement is towards the dewatering box and water drainage from the fibrous suspension is arranged to take place substantially in a
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: December 19, 2006
    Assignee: Vaahto Oy
    Inventor: Ismo Lehmus
  • Apparatus for forming a paper or cardboard web
    Publication number: 20030116297
    Abstract: An apparatus for forming a paper or cardboard web from a fibrous suspension, said apparatus having a double wire section consisting of a first wire loop formed by a first wire (v1), a second wire loop formed by a second wire (v2) and at least one headbox, from which headbox the fibrous suspension can be fed into the space between the wire loops, said first wire loop being provided with a dewatering box placed above the wire and arranged to drain water from the fibrous suspension between the wire loops via the bottom of the dewatering box and through the first wire, said apparatus having two successive dewatering zones (L0, L1-Li) provided in the area of the dewatering box, where the direction of web movement in the area of the first dewatering zone is away from the dewatering box and the runs of each wire loop are substantially straight while in the area of the second dewatering zone the direction of web movement is towards the dewatering box and water drainage from the fibrous suspension is arranged to take
    Type: Application
    Filed: November 22, 2002
    Publication date: June 26, 2003
    Inventor: Ismo Lehmus