Patents by Inventor Siegfried Spanner

Siegfried Spanner 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 winding a strip of film and for inserting it in a cassette
    Patent number: 4228579
    Abstract: A method and an apparatus of cutting a strip of film and a protective paper tape to length, winding them and inserting them into a cassette. The strip of film is wound together with the protective paper tape which is offset in the longitudinal direction and cut to length in distribution wheels and after being fed via a guide duct to a spindle is wound and inserted into a cassette housing which is open on one side. The end of the protective paper tape is welded on a spool held by means of vacuum into the cassette housing before closure of the cassette housing with the cover.
    Type: Grant
    Filed: February 27, 1979
    Date of Patent: October 21, 1980
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Franz-Heinz Dunkel, Ralf L. Klinkhammer, Heinz Nebel, Siegfried Spanner, Gerd Seibel