Patents by Inventor Kaj Lindroos

Kaj Lindroos 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: 4856158
    Abstract: A spreader roll supported at the middle thereof for a wire or felt in a paper machine, comprising a metallic inner tube and an outer tube attached onto the inner tube through an intermediate part, the intermediate part being substantially symmetric relative to a transverse center plane of the roll. The inner tube and the outer tube are substantially coaxial with one another when the roll is in an unbent state, with annular intermediate spaces situated between the tubes at both sides of the intermediate part, such intermediate spaces being dimensioned to permit deflection of the inner tube and the outer tube in different directions relative to one another by the effect of tensioning force of the fabric arranged to run over the roll. Ends or flanges can be attached to outer ends of the inner tube, while axle journals can be attached to these ends or flanges, by means of which the roll can be journaled to revolve.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: August 15, 1989
    Assignee: Valmet Oy
    Inventors: Kaj Lindroos, Mauno Tohonen