Mechanical film drive for driving motion picture film, particula

Details Mechanical film drive for driving motion picture film, particula Mechanical film drive for driving motion picture film, particula

1980-06-23

1981-08-25

Christian, Leonard D.

Advancing material of indeterminate length

By orbitally traveling material-engaging surface

With drive means

226194, B65H 1722

Patent

active

042854555

ABSTRACT:
A mechanical film drive utilizes a rotatable drive shaft which abuts a flat surface of motion picture film to be driven. The film is pinched between the drive shaft and a rubber idler roller, and the drive shaft can be coupled to and uncoupled from a speed-regulated drive motor by means of an electrically-operable clutch. A flywheel is driven by the motor. Since the inertia of the flywheel is much greater than the inertia of the drive shaft, clutch operation has only a negligible effect on drive speed, enabling film movement to be accomplished with a high degree of accuracy.

REFERENCES:
patent: 1892554 (1932-12-01), Kellogg
patent: 3602415 (1971-08-01), Gross
patent: 3612375 (1971-10-01), Baba
patent: 3800993 (1974-04-01), Stephens
patent: 3976236 (1976-08-01), Catto

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