Film spool with internal flexures to engage and release film end

Details Film spool with internal flexures to engage and release film end Film spool with internal flexures to engage and release film end

1994-01-14

1995-09-12

Darling, John P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Cartridge system

2425871, B65H 7528

Patent

active

054491258

ABSTRACT:
A film spool comprises a rigid spool core having a slot, first and second resilient flexures located inside the slot for flexing away from each other in response to axial compression at opposite ends of the flexures to permit a film end to be inserted between or removed from the flexures and being biased to return toward each other when the compression is removed, a film engagement protrusion projecting from the first flexure to between the first and second flexures to engage a film end to secure the film end to the spool core when the flexures are returned toward each other, and a film stripper protrusion projecting from the second flexure to between the first and second flexures to disengage a film end from the film engagement protrusion when the flexures are flexed away from each other.

REFERENCES:
patent: 2194560 (1940-03-01), Marchev et al.
patent: 2487479 (1949-11-01), Roehrl
patent: 2917251 (1959-12-01), Newburger
patent: 2977060 (1961-03-01), Berning et al.
patent: 3246729 (1966-04-01), Bishop
patent: 3715088 (1973-02-01), Rissberger
patent: 3743204 (1973-07-01), Hertel
patent: 4334750 (1982-06-01), Fichter
patent: 4364529 (1982-12-01), Barto, Jr. et al.
patent: 4834310 (1989-05-01), Ikariya et al.
patent: 4984751 (1991-01-01), Hoffacker et al.
patent: 5054710 (1991-10-01), Ikariya et al.
patent: 5188306 (1993-02-01), Kataoka et al.

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