Patents by Inventor Hans W. Maurer

Hans W. Maurer 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 providing irreversible smoothness in a paper rawstock
    Patent number: 5378497
    Abstract: The method comprises the application of a liquid film to a paper or paperboard rawstock web in a controlled and uniform manner to achieve a moisture gradient in the Z-direction thickness of the web to a depth of less than about one-half of the web thickness, and then pressing the treated web in at least one nip of a calender device before drying the web. The liquid application plasticizes only the surface fibers of the web so that the paper fibers at or near the surface become deformed and bonded under pressure to achieve a substantially irreversible smoothness upon being rewetted in a coating application or the like.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: January 3, 1995
    Assignee: Westvaco Corporation
    Inventors: Dean R. Johnson, Hans W. Maurer
  • Tandem calender
    Patent number: 4670102
    Abstract: A tandem calender is provided at the output end of a paper machine which includes two single stack nips in-line. The first nip is formed by a pair of steel rolls which are lightly loaded and the second nip is formed by a steel roll and a plastic covered roll which is loaded 2-10 times greater than the first nip.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: June 2, 1987
    Assignee: Westvaco Corporation
    Inventors: Hans W. Maurer, Hiawatha P. Watkins