G - Physics – 03 – B
Patent
G - Physics
03
B
95/34, 95/35
G03B 27/44 (2006.01) G03B 17/00 (2006.01) G03B 27/58 (2006.01)
Patent
CA 1049311
MICROFILM CAMERA WITH FILM MOVING CARRIAGE AND VENTED PRESSURE PLATE Abstract of the Disclosure A camera for photographing information on microfilm comprises structure defining an image aperture, a lens system for projecting an image of the information to be photographed along an optical path through the image aperture, a device for selectively clamping microfilm against the image aperture defining structure, equipment connected to the image aperture defining structure and to the clamping device for mounting and restraining the image aperture defining structure and the clamping device against lateral movement relative to the optical path, a carriage, equipment for moving the carriage relative to the image aperture de- fining structure, lens system and clamping device, and equipment on the carriage for advancing microfilm between the image aperture defining structure and the clamping device. A photographic film handling apparatus wherein photo- graphic film is positioned at a structure defining an image aperture comprises a film pressure plate having a cluster of air holes for an escape of air from a space between the film pressure plate and adjacent photographic film, equipment for mounting the film pressure plate adjacent the aperture de- fining structure, and equipment coupled to the film pressure plate for actuating the film pressure plate relative to the aperture defining structure.
238858
Butts William O.
Jamieson John
Price Henry F.
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