Film spool with built-in audible indicator for verifying film lo

Details Film spool with built-in audible indicator for verifying film lo Film spool with built-in audible indicator for verifying film lo

1995-05-24

1996-12-03

Darling, John P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Cartridge system

396283, 396284, 396512, G03B 1726

Patent

active

055800114

ABSTRACT:
A film spool has a film-unwound verifier that produces an audible indication that a particular length of a filmstrip has been unwound from the spool.

REFERENCES:
patent: 3735682 (1973-05-01), Kamp et al.
patent: 3831881 (1974-08-01), Tucker
patent: 5032854 (1991-07-01), Smart et al.
patent: 5274412 (1993-12-01), Stoneham et al.
patent: 5404188 (1995-04-01), Takahashi et al.

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