G - Physics – 03 – B
Patent
G - Physics
03
B
95/34
G03B 1/42 (2006.01)
Patent
CA 1075949
Abstract of the Disclosure A photographic film handling apparatus of the invention wherein photographic film is positioned at a structure defining an image aperture comprises a circular film pressure plate, which may have a cluster of air holes for an escape of air from a space between the film pressure plate and adjacent photographic film. The apparatus includes means for mounting the film pressure plate adjacent the aperture defining structure this mounting means mounting the circular pressure plate for rotation about an axis perpendicular to the circular surface of the plate. The apparatus further including equipment coupled to the film pressure plate for actuating the film pressure plate relative to the aperture defining structure. A camera including such film handling apparatus and for photographing information on microfilm comprises the said 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, the film pressure plate 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 defining structure, lens system and clamping device, and equipment on the carriage for advancing microfilm between the image aperture defining structure and the clamping device.
314433
Butts William O.
Jamieson John
Price Henry F.
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