Patents by Inventor Leif Helgesson

Leif Helgesson 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: 20030183353
    Abstract: An apparatus for transferring a tail of a fibrous web through a press section of a machine for making the fibrous web is disclosed. The apparatus includes a threading device positioned between first and second press section transfer devices that is pivotable between an inoperable position and an operable position. The threading device includes a stationary upper surface defined by a plurality of tubes. The tubes discharge air over the upper surface of the threading device to form an air cushion having an underpressure between the tail of the fibrous web and the threading device. The tail of the web is urged by the air cushion to the second transfer device and is threaded thereinto.
    Type: Application
    Filed: December 10, 2001
    Publication date: October 2, 2003
    Applicant: METSO PAPER KARLSTAD AB
    Inventors: Leif Helgesson, Kent Johnansson
  • Patent number: 6131784
    Abstract: A device for drawing a web through an open draw in a paper or board machine with the aid of a leader, said open draw extending between a first web-carrying element and a second web-carrying element, said device comprising a stand structure and a transfer member having the width of the leader. According to the invention the transfer member is arranged to be inserted at and above the first web-carrying element and set in various predetermined positions, the device having setting members for setting the position and direction of the transfer member in relation to the second web-carrying element; a travelling member to carry and move the transfer member; and actuator for operating the travelling member.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 17, 2000
    Assignee: Valmet-Karlstad AB
    Inventors: Leif Helgesson, Mikael Nyman