Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1993-03-31
1994-04-19
Hayes, Monroe H.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 711, G03B 1726
Patent
active
053050428
ABSTRACT:
A film cassette comprises a cassette shell, a spool core supported inside the cassette shell for rotation in an unwinding direction to advance a filmstrip coiled about the spool core out of the cassette shell and in a winding direction to draw the filmstrip into the cassette shell, at least one flange coaxially coupled with the spool core to prevent the filmstrip from uncoiling about the spool core and to permit the flange and the spool core to be rotated relative to each other in the unwinding and winding directions, and cooperating means located on the spool core and the flange for fixing the flange and the spool core to each other to make the flange rotate with the spool core in the unwinding direction but releasing the flange to permit it and the spool core to be rotated relative to each other in the winding direction. According to the invention, stop means are connected to the cassette shell, and the flange has engageable means for being engaged by the stop means when the flange is rotated with the spool core in the winding direction to prevent the flange from further rotating in that direction, whereby the flange will impose a frictional drag on the filmstrip as the filmstrip is wound onto the spool core to cause the filmstrip to be wound tightly to the spool core.
REFERENCES:
patent: 3804351 (1974-04-01), Kaneko et al.
patent: 4407579 (1983-10-01), Huff
patent: 5003334 (1991-03-01), Pagano et al.
patent: 5031852 (1991-07-01), Dowling et al.
patent: 5040739 (1991-08-01), Wolf et al.
patent: 5151730 (1992-09-01), Kemp et al.
Butler Russell J.
Mattson Christopher T.
McCormick Christopher
Niedospial Jr. John J.
Eastman Kodak Company
Fields Roger A.
Hayes Monroe H.
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