| 摘要 |
An endless film cartridge has a lock pin to engage a sprocket hole of the film as the cartridge is removed from its holder. The lock pin holds the film correctly framed in the aperture window and assures proper engagement of the drive teeth with the film when the cartridge is mounted again in the holder. The guide pad on the holder pushes a pressure plate inwardly of the cartridge to release the film from the lock pin as the cartridge is mounted.
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