Film tensioning device

Details Film tensioning device Film tensioning device

1977-10-11

1979-03-20

Schacher, Richard A.

Advancing material of indeterminate length

With means to retard material movement

226102, 352182, B65H 2308

Patent

active

041449916

ABSTRACT:
A film tensioning device for maintaining tension in the film in a film transport system such as a motion picture projector. A tension roller mounted between pressure rollers with the film running over the tension roller, with a spring urging the pressure rollers against the film to prevent slippage of the film on the tension roller. A curved spring carried within the tension roller and engageable with a stop providing sliding friction with the tension roller. The spring is readily removable for substitution of a different spring to provide a different magnitude of tension in the device.

REFERENCES:
patent: 2091692 (1937-08-01), Scott
patent: 2865475 (1958-12-01), MacMillin
patent: 3330458 (1967-07-01), Bentzman
patent: 3951324 (1976-04-01), Pundsack

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