Patents by Inventor Donald G. Sparkes

Donald G. Sparkes 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 the rapid consolidation and/or drying of moist porous webs
    Patent number: 4788779
    Abstract: There is taught a method and apparatus for a drying of a continuous moist web such as paper wherein the web is passed through a nip formed of two moving surfaces, one of these surfaces being a relatively impermeable material heated to a temperature of at least 120.degree. C., the other surface being formed of a relatively porous material and being maintained at a temperature below 100.degree. C., while maintaining a pressure on the moist web sufficient to prevent blowoff.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: December 6, 1988
    Assignee: Pulp and Paper Research Institute of Canada
    Inventor: Donald G. Sparkes