Film and paper assembly for film cartridges

Details Film and paper assembly for film cartridges Film and paper assembly for film cartridges

1981-12-31

1984-02-21

Gonzales, John

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 712, 430501, G03B 1726

Patent

active

044326254

ABSTRACT:
In a film cartridge employing roll film with a backing strip, film flatness is improved by means of two innovations which are employed either individually or in combination, depending on the specific type of film cartridge involved. First, to prevent the relative slippage between the paper and the backing strip, resulting from "clock springing" of the film supply roll, the trailing end of the film is attached to the backing strip. Second, the film and backing strip assembly is provided initially with sufficient extra backing strip in the film take-up chamber to guarantee that there will always be a surplus of backing strip in that chamber so that only the film will be tensioned by the rotation of the take-up roll.

REFERENCES:
patent: 733539 (1903-07-01), Cady
patent: 1255017 (1918-01-01), Jones

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