Spooling arrangements for endless band material

Details Spooling arrangements for endless band material Spooling arrangements for endless band material

1975-04-04

1976-09-21

Hayes, Monroe H.

Optics: motion pictures

With rewinding of film strips

During projection of another film strip

352128, 242 5516, G03B 2300

Patent

active

039815714

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.

REFERENCES:
patent: 1759024 (1930-05-01), Selbach

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