Patents by Inventor Thomas Kefer

Thomas Kefer 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).

  • Process and device for removing water from a mechanical pulp, chemical pulp or paper sheet
    Patent number: 7090746
    Abstract: A process and apparatus for removing water from a mechanical pulp, chemical pulp or paper sheet, carried between top and bottom wires running through a dewatering machine having a first dewatering zone. The apparatus includes at least one suction box positioned downstream of the first dewatering zone. The process includes generating an air current in at least one of the wires downstream of the first dewatering zone with the suction box. The air current removes water from the wire and directs it into an inner chamber of the suction box. The invention also refers to a device for implementing the process.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: August 15, 2006
    Assignee: Andritz AG
    Inventors: Franz Petschauer, Karl Hornhofer, Thomas Kefer, Dietmar Hausjell, Edgar Brogyanyi, Reinhard Diemat
  • Process and a device for the formation of fiberboard
    Publication number: 20050045299
    Abstract: A process for the formation of fiberboard where the fiber stock suspension is dewatered on two sides between wires or felts, a top wire being provided in the main dewatering zone.
    Type: Application
    Filed: September 16, 2004
    Publication date: March 3, 2005
    Inventors: Franz Petschauer, Josef Steinegger, Thomas Kefer, Johannes Kappel
  • Process and device for removing water from a mechanical pulp, chemical pulp or paper sheet
    Publication number: 20030183355
    Abstract: A process and apparatus for removing water from a mechanical pulp, chemical pulp or paper sheet, carried between top and bottom wires running through a dewatering machine having a first dewatering zone. The apparatus includes at least one suction box positioned downstream of the first dewatering zone. The process includes generating an air current in at least one of the wires downstream of the first dewatering zone with the suction box. The air current removes water from the wire and directs it into an inner chamber of the suction box. The invention also refers to a device for implementing the process.
    Type: Application
    Filed: April 1, 2002
    Publication date: October 2, 2003
    Inventors: Franz Petschauer, Karl Hornhofer, Thomas Kefer, Dietmar Hausjell, Edgar Brogyanyi, Reinhard Diemat
  • Process and a device for the formation of fiberboard
    Publication number: 20020084051
    Abstract: A process for the formation of fiberboard where the fiber stock suspension is dewatered on two sides between wires or felts, a top wire being provided in the main dewatering zone.
    Type: Application
    Filed: January 17, 2002
    Publication date: July 4, 2002
    Applicant: Andritz-Patenverwaltungs-Gesellschaft m.b.H.
    Inventors: Franz Petschauer, Josef Steinegger, Thomas Kefer, Johannes Kappel