Patents by Inventor John Wallace de Vos

John Wallace de Vos 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 for obtaining a dual strata distribution of superabsorbent in a fibrous matrix
    Patent number: 6416697
    Abstract: A method and apparatus for forming an article (94) includes a moving of a forming surface (22) through an operative forming chamber (24) along a forming path length (40). A first fibrous stratum (26) of fiber material (96) can be deposited onto the forming surface (22), and the first fibrous stratum (26) can have a first stratum thickness (28). A first quantity of a first superabsorbent material (30) can be directed to form a selected combination with the first fibrous material to provide a first superabsorbent-containing stratum. A second fibrous stratum (32) of fibrous material can be deposited to overlie the first fibrous stratum (26), and the second fibrous stratum (32) can have a second stratum thickness (34). A second superabsorbent material (36) can be directed to form a selected combination with the second fibrous material to provide a second superabsorbent-containing stratum.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: July 9, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Barth Venturino, Randy Keith Burr, John Wallace de Vos, Leon Robert Flesburg, David Willis Heyn, Richard Francis Keller, Thomas George Olsen, Lorry Francis Sallee
  • Method and apparatus for depositing particulate material in a fibrous web
    Patent number: 6202259
    Abstract: A method and apparatus for depositing particulate material (30, 36) in an airlaid fibrous web (94) includes a moving of a forming surface (22) through a forming chamber (24), and a laying of a fibrous material (96) onto the forming surface to form the fibrous web. The particulate material is delivered into the forming chamber with an arcuate curved nozzle (86) which is positioned within the forming chamber at a location spaced from the forming surface.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: March 20, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Randy Keith Burr, John Wallace de Vos, David Willis Heyn, Richard Francis Keller, Thomas George Olsen
  • Side-by-side absorbent pad forming
    Patent number: 5762844
    Abstract: A distinctive method and apparatus (20) for forming a composite fibrous web (22) includes a web supply (24, 25), which provides at least two appointed fiber layer sections (26, 28) of desired fiber material. Each of the layer sections (26, 28) has a selected composition. A fiberizer (30) disintegrates each of the fiber layer sections (26, 28) into individual, laterally adjacent fiber streams (32, 33) while substantially maintaining a lateral separation of the fiber streams while the fiber streams (32, 33) are moving through the fiberizer (30). A directing channel (34) delivers the fiber streams (32, 33) from the fiberizer (30) to a forming chamber (40). The forming chamber (40) is configured to substantially maintain the separation of the fiber streams.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: June 9, 1998
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: James George Van Himbergen, Thomas George Olsen, James Joseph Wiltzius, John Wallace de Vos, Leon Robert Flesburg, Ryan Joseph Roth, Brian Keith Costelic