Abstract: The reversing film projection system employs film having images printed substantially side-by-side to allow presentation of one set of images in a forward direction and the adjacent images in rearward direction by moving the projection head and associated aperture plate and film guide laterally with respect to the lens and lamp house for display of the film images. In a first forward drive position, the projector motor drives the film in a forward direction with a first aperture of the aperture plate and associated first set of film images aligned with the optical train. Upon completion of the image presentation in the forward direction, the projection head is displaced laterally aligning a second aperture in the aperture plate and the associated second set of film images with the optical train, with the projection motor engaged in a reversed direction.

Abstract: A series of film-containing cassettes are placed in projecting positions and thereafter in rewinding positions. First and second take-up reels are arranged to be axially movable between first and second positions. An elongate film guide member is movable between an active position in which the guide defines a straight threading path between the cassette occupying the projecting position and the take-up reel occupying the first position and a normally inactive position in which the guide is clear of the threading path. In the film threading mode, the leading end of film is driven through the straight threading path and taken up by the take-up reel. A film handling mechanism is provided between the opposite ends of the threading path. Upon completion of film threading, the movable elongate guide is restored to the inactive position and the film handling mechanism is brought into operation to engage the film with an aperture plate.

Abstract: An arrangement for spooling endless band material, particularly for the repeated projection of the full length of cinematograph film required for a complete programme formed as an endless loop, having two double spools each able to carry two film spirals. In a first half of the projection operation Spool 1, Spiral 1, is fed through the projector and taken up as Spool 2, Spiral 1. Simultaneously, Spool 1, Spiral 2, is directly rewound as Spool 2, Spiral 2. Both spools are then reversed and, in the second half of the projection operation, Spool 2, Spiral 2, is fed through the projector and taken up as Spool 1, Spiral 2, and Spool 2, Spiral 1, is directly rewound as Spool 1, Spiral 1. The initial state is re-established and the projection operation is continuously repeatable without rethreading the projector.

Abstract: A continuous motion picture projection apparatus for use with a film strip having two side by side data tracks each comprising a photographic image track and a synchronized sound track. The first half of the program is carried by one data track and the other half by the second data track. The apparatus includes a main drive assembly which moves the film strip through the unit alternately in a forward and reverse direction and further comprises an illumination system, a projection lens system and a sound track sensor system. These systems are movable between a first position in alignment with the first data track and a second position in alignment with the second data track. Mechanisms associated with each of the systems are operably coupled with the main drive assembly and serve to automatically move the systems between their first and second positions upon reversal of the drive assembly.