Patents by Inventor Robert N. Francois

Robert N. Francois 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: 5314133
    Abstract: A color film supply apparatus has a supply roll holding unused color film. The apparatus simplifies the handling of the color film. For this purpose, the supply roll and a waste roll to hold used film are supported in a cassette-type, portable housing in a manner such that a length of the color film extends between the supply roll and the waste roll and the housing has, between the supply roll and the waste roll, an opening that is at least as wide as the color film and permits free access to both sides of the color film. In addition, a straight edge is located in the section of the housing containing the waste roll and deflects the travel path of the color film.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: May 24, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Helmut G. Sandner, Peter Ulrich, Robert N. Francois, Michael Hawkins