Patent ID: 6019473
Filing Date: 2000-02-01
Classification: G03B

Abstract:
A film projector movement for transporting film through a motion picture projector, wherein the film has a series of frames and a plurality of perforations along edges of the film, comprising:a plurality of sprockets having teeth for engaging the perforations and for moving the film through the projector;an intermittent advance mechanism that moves the film frame-by-frame past an aperture in the projector;a motive element that rotates the sprockets and actuates the intermittent advance mechanism; anda controller that controls the motive element and is adapted to either maintain or change the rotational speed of the sprockets and the positioning of the intermittent advance mechanism based on the format of the film in terms of the number of perforations spanned by each frame on the film, wherein the frames of the film are recentered with respect to the aperture each time there is a change in the film format, and wherein the controller is further adapted to maintain or change the projection frame-rate in terms of frames per second.