Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1976-07-22
1978-02-21
Mautz, George F.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
81 3R, 242 711, B25B 900, G03B 102
Patent
active
040748707
ABSTRACT:
A film retriever for and a method of retrieving a free end of a convolutely wound film from inside a cylindrical cassette through an exit opening in a circumferential wall on said cassette. The retriever comprises a first, upper, thin, flexible, springy strip of material having an anterior tongue portion of a length slightly less than the interior circumference of the cassette and a wider, longer posterior portion, said posterior portion having a pair of spaced, parallel slots. The retriever further comprises a second, lower, thin, flexible, springy strip of material having a curled, anterior tongue portion of a length slightly less than the interior diameter of the cassette and a wider, longer posterior portion having tabs therein which slidingly engage the slots of the first posterior portion.
The method comprises inserting the two-part retriever into the cassette through the exit opening, arranging the flexible strips within the cassette so that the upper strip lies adjacent most of the interior cylindrical wall of the cassette, while the curled, anterior tongue portion of the lower strip forms a film-receiving channel with the upper strip adjacent the exit opening, rotating the protruding hub of the cassette counterclockwise until the free end of the film passes the end of the curled, anterior tongue portion, rotating the protruding hub clockwise until said hub can no longer be turned, and then withdrawing the upper and lower components while simultaneously turning the protruding hub clockwise.
REFERENCES:
patent: 1508287 (1924-09-01), Moran
patent: 3261237 (1966-07-01), Sentiff
patent: 3864993 (1975-02-01), Hovind
Mautz George F.
Sklar Lawrence E.
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