Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – With particular drive
Patent
1994-11-30
1995-08-29
Nguyen, John Q.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
With particular drive
3541731, 2423322, 242340, 242357, 242545, G03B 118, B65H 2000
Patent
active
054453402
ABSTRACT:
A film feeding device for a camera uses first and second electric motors associated with first and second planetary gearing mechanisms, respectively. In one embodiment, the first motor and first planetary gearing mechanism drive a spool shaft of a film cartridge to supply film to a winding spool. The winding spool is driven by the second motor and second planetary gearing mechanism to wind film onto the winding spool, at which time the first motor is stopped and the first planetary gearing mechanism is automatically disconnected from the spool shaft. For rewinding, the second motor is operated in reverse and the second planetary gearing mechanism is automatically disconnected from the winding spool and connected to the spool shaft of the film cartridge. In a second embodiment, the first motor and the first planetary gearing mechanism are employed to drive the spool shaft of the film cartridge in a film supply direction or a film rewind direction, and the second motor and the second planetary gearing mechanism are only used to drive the winding spool in a film winding direction.
REFERENCES:
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patent: 4659201 (1987-04-01), Suzuki et al.
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patent: 4885599 (1989-12-01), Goto et al.
patent: 5061950 (1991-10-01), Suzuki et al.
Daitoku Koichi
Ezawa Akira
Wakabayashi Tsutomu
Nguyen John Q.
Nikon Corporation
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