Patents by Inventor Roger E. Wallis

Roger E. Wallis 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).

  • Patent number: 4238280
    Abstract: A photographic support is produced by heat consolidating paper made wholly of thermoplastic synthetic fibres. The consolidation is carried out in such a way as to produce a homogeneous surface film having a desired surface finish for receiving a photographic coating, a fully bonded but still fibrous layer adjacent the film, and a lightly bonded fibrous layer adjacent the fully bonded fibrous layer. The homogeneous surface film is produced in such a manner that its surface is substantially free of pits. This may be achieved by consolidating the web by heating it on one surface while cooling it on the other surface.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: December 9, 1980
    Assignee: The Wiggins Teape Group Limited
    Inventors: Roger E. Wallis, Michael R. Chamberlain