Film cabinet with roller attachment and film transfer mechanisms

Details Film cabinet with roller attachment and film transfer mechanisms Film cabinet with roller attachment and film transfer mechanisms

1991-02-05

1993-03-30

Stodola, Daniel P.

Advancing material of indeterminate length

Plural material-moving means

And intermediate storage

226189, 226199, 3122091, B65H 7500

Patent

active

051976447

ABSTRACT:
A film cabinet for storing and moving a continuous loop of film. The cabinet includes parallel rows of free-spinning rollers connected to the floor and ceiling of the cabinet, and a row of drive sprockets adjacent to the ceiling having teeth for engaging the perforated edges of the film. The film is moved throughout the cabinet around the free-spinning rollers by rotation of the single row of drive sprockets. The film also may be wound around at least one tension roller having a mercury activated switch adapted to disconnect power to the drive sprockets upon film breakage inside the cabinet. Transfer of the film between the cabinet and projector is accomplished by a directionally adjustable film transfer mechanism that ensures proper bending and twisting of the film during this transfer. Other aspects include a quick connect-disconnect roller attachment mechanism, and film guides located in the cabinet to prevent sagging of the film as it traverses, for example, the floor and ceiling of the cabinet.

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patent: 4389135 (1983-06-01), Peters
patent: 4913610 (1990-04-01), Olivieri

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