Patents by Inventor Edward C. Wolthausen

Edward C. Wolthausen 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).

  • Ultrasonic softness testing system
    Patent number: 4548081
    Abstract: The softness of paper as a function of the number of bonding sites per unit area of the paper is determined by directing ultrasonic energy toward the paper and determining the magnitude of the portion of reflected energy.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: October 22, 1985
    Assignee: Crown Zellerbach Corporation
    Inventor: Edward C. Wolthausen
  • System and method for continuously preventing filament bridging between adjacent draw nozzles
    Patent number: 4387065
    Abstract: A system and method are provided for continually preventing filament bridging between adjacent draw nozzles. The system comprises a heating element, generally in the form of a metal heating wire, which is disposed between adjacent nozzles and is positioned in the path of filaments attempting to bridge the nozzles. The temperature is maintained at a level high enough above the melting point of the filaments so that they will continuously and instantaneously melt when they contact the heating element.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: June 7, 1983
    Assignee: Crown Zellerbach Corporation
    Inventors: Imants Reba, Edward C. Wolthausen
  • System and method for dispersing filaments
    Patent number: 4285452
    Abstract: A system and method are provided for dispersing a plurality of filaments, moving at high velocity, without substantial fiber aggregation, for subsequent uniform deposition on a web-forming surface, by the use of opposed Coanda nozzles. The Coanda nozzles are operated under nonsteady-state conditions whereby a substantially nonsymmetrical filament pattern is created between the opposed Coanda surfaces.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 25, 1981
    Assignee: Crown Zellerbach Corporation
    Inventors: Imants Reba, Edward C. Wolthausen