Patents by Inventor Frank M. Stieger

Frank M. Stieger 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: 4173058
    Abstract: In a method for manufacturing photographic film processing rollers useful in processing self-processable type film units, an adhesive priming composition is first applied to the surface of a cylindrical metal rod of given length. The rod is then pushed through a cross-head extrusion die to deposit a melted polymer comprising an elastomeric urethane resin on its surface to provide the rod's surface with a thin coating whose coefficient of friction is greater than that of the metal. The extruded coating is then hardened, and then the rod is cut into roller segments each having a predetermined length. Afterwards, each roller segment is centerless ground to provide it with journals at its opposite ends and to reduce the thickness of the polymeric coating intermediate the journals to provide a film-contacting traction coating of predetermined thickness and smoothness.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: November 6, 1979
    Assignee: Polaroid Corporation
    Inventor: Frank M. Stieger