Patents by Inventor John Henry Dwiggins

John Henry Dwiggins 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).

  • Foam forming method and apparatus
    Patent number: 6500302
    Abstract: Apparatus and process for producing foam formed fibrous web in which the furnish is made up by mixing a thin water slurry of fibers at a consistency in the range of from about 0.5 to about 7 weight percent fibers with sufficient aqueous foam containing a surfactant and having an air content in the range of from about 55 to about 80 percent by volume to form a foamed fiber furnish containing from about 0.1 to about 3 weight percent fibers which is supplied directly to the forming felt or wire of a twin wire papermaking machine, adding makeup surfactant and discarding excess aqueous foam from the process as required to maintain the desired volume of foamed liquid therein.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: December 31, 2002
    Assignee: Fort James Corporation
    Inventors: John Henry Dwiggins, Dinesh M. Bhat
  • Foam forming method and apparatus
    Patent number: 6413368
    Abstract: Apparatus and process for producing foam formed fibrous web in which the furnish is made up by mixing a thin water slurry of fibers at a consistency in the range of from about 0.5 to about 7 weight percent fibers with sufficient aqueous foam containing a surfactant and having an air content in the range of from about 55 to about 80 percent by volume to form a foamed fiber furnish containing from about 0.1 to about 3 weight percent fibers which is supplied directly to the forming felt or wire of a twin wire papermaking machine, adding makeup surfactant and discarding excess aqueous foam from the process as required to maintain the desired volume of foamed liquid therein.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: July 2, 2002
    Assignee: Fort James Corporation
    Inventors: John Henry Dwiggins, Dinesh M. Bhat
  • Foam forming method and apparatus
    Publication number: 20020066544
    Abstract: Apparatus and process for producing foam formed fibrous web in which the furnish is made up by mixing a thin water slurry of fibers at a consistency in the range of from about 0.5 to about 7 weight percent fibers with sufficient aqueous foam containing a surfactant and having an air content in the range of from about 55 to about 80 percent by volume to form a foamed fiber furnish containing from about 0.1 to about 3 weight percent fibers which is supplied directly to the forming felt or wire of a twin wire papermaking machine, adding makeup surfactant and discarding excess aqueous foam from the process as required to maintain the desired volume of foamed liquid therein.
    Type: Application
    Filed: November 26, 2001
    Publication date: June 6, 2002
    Applicant: James River Corporation
    Inventors: John Henry Dwiggins, Dinesh M. Bhat