Device for the endless projection of a cinematographic film

Details Device for the endless projection of a cinematographic film Device for the endless projection of a cinematographic film

G - Physics

03

B

271/37

G03B 21/32 (2006.01)

Patent

CA 1264337

ABSTRACT OF THE DISCLOSURE: This device for the endless projection of a cinematographic film comprises a horizontal, rotatable table and a winding drum positioned in the center of the table. The film to be projected is formed into a film roll surrounding the winding drum. An annular body of the winding drum is provided, at its outer periphery, with a great number of rotatable supporting rollers having vertical axles, for radially supporting the in- nermost winding of the film roll.At the top side of the table a plurality of horizontal supporting rollers are arranged, the axles of which are radial to the table. The axial length of each horizontal supporting roller is substantially shorter than the radial dimen- sion of the table. The annular body of the winding drum is provided with a radial slit, through which the lnner- most winding of the film roll can be drawn off. In the inner space of the winding drum there are a plurality of guide pulleys and a motor driven sprocket for guiding and moving the film, so that the film is continuously rewound from the inner periphery of the film roll and fed to a projector. The film portion coming back from the projector is continuously wound up at the outer periphery of the film roll. The table is rotated by means of a motor for favorizing the rotation of the film roll during the projection.

476953

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