Spool for film and lens units

Details Spool for film and lens units Spool for film and lens units

1990-04-30

1991-10-08

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

B65H 7528

Patent

active

050547100

ABSTRACT:
A spool for winding a photographic roll of film in a camera. The spool includes a shaft having a slit formed by opposed walls one of which has a protrusion extending into the slit and positioned between two ribs of the other wall. The protrusion is received in a perforation of the film tongue to wind the film when the spool is turned in a winding direction. When the film is unwound, the film tongue smoothly and reliably slips out of the slit as the perforation wall slides down an angled wall of the protrusion so that the film is released from the spool.

REFERENCES:
patent: 3383069 (1968-05-01), Riedel et al.
patent: 4398679 (1983-08-01), Kluczynski et al.
patent: 4445770 (1984-05-01), Morse
patent: 4834310 (1989-05-01), Ikariya et al.
patent: 4955555 (1990-09-01), Pierson et al.

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