Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – Cartridge system
Patent
1993-03-31
1994-08-16
Stodola, Daniel P.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
Cartridge system
242349, 242394, 354275, 464 37, 192 56R, G03B 1726
Patent
active
053379713
ABSTRACT:
A film spool comprises a spool core provided with a coaxial opening adapted to receive a rotational driver rotatable alternatively in film winding and unwinding directions to similarly rotate the spool core. The spool core includes first and second torque transmission devices. The first torque transmission devices projects into the core opening to be located in the way of the rotational driver, when the driver is rotated inside the core opening in the film unwinding direction, for making the driver rotate the spool core in the film unwinding direction responsive to the driver applying an unwinding turning force to the first torque transmission devices, and is capable of being deformed out of the way of the driver, when the unwinding turning force the driver applies to the first torque transmission devices exceeds a maximum force greater than required to rotate the spool core in the film unwinding direction, for allowing the driver to freely rotate inside the core opening in the film unwinding direction. The second torque transmission devices projects into the core opening to be located in the way of the rotational driver, when the driver is rotated inside the core opening in the film winding direction, for making the driver rotate the spool core in the winding direction responsive to the driver applying a winding turning force to the second torque transmission devices.
REFERENCES:
patent: 2634650 (1953-04-01), Coop
patent: 2826107 (1958-03-01), Woods
patent: 3784001 (1974-01-01), Bushnell et al.
patent: 3794269 (1974-02-01), Hoover
patent: 3942338 (1976-03-01), Furlette et al.
patent: 4610340 (1986-09-01), Helmes et al.
patent: 4969301 (1990-11-01), Warden
patent: 5090532 (1992-02-01), Bich
patent: 5151730 (1992-09-01), Kemp et al.
Eastman Kodak Company
Fields Roger A.
Nguyen John Q.
Stodola Daniel P.
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