Film cassette

Details Film cassette Film cassette

1990-01-12

1991-02-12

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

354275, G03B 1726

Patent

active

049917862

ABSTRACT:
In a film cassette, a film spool is rotatable inside a cassette shell in an unwinding direction to thrust a leader section of a filmstrip coiled about the spool from within a light-tight film passageway to the exterior of the shell and in a winding direction to return the leader to the interior of the shell. A unidirectional arresting device is movable into engagement with the spool to prevent rotation of the spool in only the winding direction. The filmstrip includes an inclined edge for moving the arresting device out of engagement with the spool responsive to thrusting the leader substantially to the exterior of the shell, to allow the spool to be rotated in the winding direction in order to return the leader to the interior of the shell, and for permitting the arresting device to move into engagement with the spool responsive to return of the leader to within the passageway, to prevent the spool from being rotated further in the winding direction to thereby retain the leader in the passageway.

REFERENCES:
patent: 3622101 (1971-11-01), Sutliff et al.
patent: 3831881 (1974-08-01), Tucker
patent: 3894700 (1975-07-01), Ito et al.
patent: 4274728 (1981-06-01), Waaske
patent: 4338015 (1982-07-01), Holmes
patent: 4395107 (1983-07-01), Luhrig et al.
patent: 4482232 (1984-11-01), Engelsmann et al.
patent: 4883236 (1989-11-01), Niedospial et al.

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