| 摘要 |
In the removal of a film unit from a motor-assisted self-processing camera, the number of rotations per unit time of the pressure rollers which accomplish such removal is controlled by providing electrical contacts in association with a star wheel and a motor. The star wheel includes electrically conductive and nonconductive portions arranged so that the angular orientation of the star wheel relative to the electrical contacts determines whether or not current will be furnished from a battery to the motor. An orbiting pin, synchronized with the rotation of the pressure rollers, advances the star wheel through a portion of a cycle for each complete revolution of the pin. After a desired number of revolutions of the orbiting pin, the star wheel completes a full cycle and returns to an end-of-cycle position in which position current to the motor is removed and the motor dynamically braked. Drive to the pressure rollers commences with the return of the shutter release after exposure of a film unit. A mechanism, energized by the depression of the shutter release nudges the star wheel mechanically off of its end-of-cycle position to permit electric current to flow from the battery to the motor.
|
