Closure-operated Patents (Class 352/230)
  • Patent number: 4933693
    Abstract: A camera is adapted for use with a film cassette in which a film spool is rotatable to unwind a filmstrip off the spool to automatically thrust a non-protruding leader portion of the filmstrip from the cassette to enable the leader portion to be propelled in the camera over an exposure opening and to a film take-up means. The filmstrip including the leader portion has a natural tendency to curve crosswise. In the camera, a pressure plate is resiliently biased to an operative position for pressing the filmstrip flat at the exposure opening. A restraining device is operated to hold the pressure plate in a retracted position sufficiently removed from the exposure opening. This permits the filmstrip to assume its natural cross-curvature in order to significantly increase the longitudinal strength of the leader portion to facilitate its being propelled over the exposure opening and to the film take-up means responsive to unwinding rotation of the film spool.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: June 12, 1990
    Assignee: Eastman Kodak Company
    Inventor: David E. Beach
  • Patent number: 4076400
    Abstract: A microfilm reader has a film transport mechanism driven by separate forward and reverse motors. When the forward motor first starts, power may be applied, via a one way clutch, to a capstan in order to automatically thread the film into the reader. A film gate opens as the film approaches it and thereafter closes, after the film is captured therein. A manual override gate control may prop the film gate open, if film is manually fed through the system.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: February 28, 1978
    Assignee: Bell & Howell Company
    Inventors: Thomas J. Persha, David Jagielski