Patents by Inventor David W. Folden

David W. Folden 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).

  • Method and apparatus for depositing moisture-absorbent and thermoplastic material in a substrate
    Patent number: 5143680
    Abstract: A method and apparatus for forming a non-woven pad of fibrous material is provided in which highly moisture-absorbent particles and fibers of thermoplastic material are intermixed with the fibrous material throughout one or more predetermined portions of the thickness of the non-woven pad while maintaining other portions of the thickness of the pad substantially free of highly moisture-absorbent particles and/or thermoplastic fiber material. The non-woven pad is formed on one side of a conveyor moving through a forming chamber which has a duct connected to a source of vacuum operable to draw fibrous material injected into the chamber onto the conveyor.
    Type: Grant
    Filed: May 17, 1990
    Date of Patent: September 1, 1992
    Assignee: Nordson Corporation
    Inventors: Julius J. Molnar, Ernest J. Fena, David W. Folden, Douglas A. Schneider, Richard A. Becker, Charles L. Fimmen, David M. Selestak, Robert Shlapak