Optics: motion pictures – Gates – With edge guide
Patent
1992-04-09
1993-11-30
Hayes, Monroe H.
Optics: motion pictures
Gates
With edge guide
352187, 226 87, G03B 148
Patent
active
052669793
ABSTRACT:
An improved film gate for a continuous motion or real-time motion picture telecine. A housing supports and transports a film in continuous motion past a frame aperture. A precision milled entry guide roller receives the film from a feed spool, edge-stabilizes the film, and directs the film to a precision milled first entry sprocket. The entry sprocket is positioned prior to the frame aperture, pin registers the film, and directs the film across the frame aperture. A precision milled exit sprocket positioned subsequent to the frame aperture receives the film after it passes across the frame aperture and pin registers the film. A precision milled exit guide roller receives the film from the exit sprocket, edge stabilizes the film, and guides the film to a drive capstan and take up reel. The precision sprockets and rollers serve as film stabilizing means. A floating guide means positioned at the frame aperture provides additional edge stabilization of the film as it is guided past the frame aperture. Film jitter and weave are mechanically removed to less than about 20 nanoseconds without the use of complex expensive electronics.
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Brown Brian K.
Chambliss Walter K.
Hayes Monroe H.
Steadi-Film Corporation
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