| 摘要 |
A film cartridge is provided with an internal mechanism for engaging and pulling a leading end of film from a roll to extend the film through a cartridge exit port. A one-way clutch, including a rotational element captured in a ramped cage, moves in one direction to capture the film between the ball and cage and advance the film through the exit. Movement in the opposite direction releases the film and repositions the clutch for the next advance. Still more specifically, the cartridge includes a second and opposite working one-way clutch for preventing premature retraction of the film. A release mechanism is employed for disabling both clutches when desired for intentional rewinding.
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