| 摘要 |
A machine to facilitate editing of several films employs sprocket wheels spaced vertically along a central vertical shaft. The sprocket wheels are individually selectively engageable and disengageable from the vertical shaft to permit the synchronization of the films to be adjusted and maintained. In a first embodiment, the supply reels and the take-up reels associated with each sprocket wheel are supported at the same height as the sprocket wheel at the left and right sides of the machine, respectively, in stacked arrangements. In a second embodiment, the supply reels and the take-up reels are supported in terraced arrangements. In both of these embodiments, a central area of the top of the machine between the supply reels and the take-up reels is left clear as a working space, giving the operator easy access to the reels and to the sprocket wheels. Each film passes through only a single sprocket wheel, and therefore is quickly threaded and unthreaded by the operator.
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