Patents by Inventor Rudolf Schonfeld

Rudolf Schonfeld 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: 4353538
    Abstract: The invention relates to an input/output device for unexposed or latently exposed photographic sheet material for use in combination with photographic material evaluation devices. The invention comprises a flat light-tight cartridge having an opening, a film support displaceably arranged within said cartridge and externally operable, and a light-stop for said opening. The cartridge is insertable into a socket of the evaluation device so that the film can be shifted out of the cartridge and into the likewise light-tight evaluation device to be secured to holding means of a recording drum in said device. By sucking means within and respective rotation of said drum the film is evenly attached to the drum surface. By control of the input/output operation by means of a control unit an automatic handling of film material at normal light conditions is feasible.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: October 12, 1982
    Inventors: Christhard Deter, Wolfgang Schaller, Rudolf Schonfeld, Klaus Haak