| 摘要 |
Automatic film threading mechanism for use in motion picture projectors, comprising a driven endless elastic belt a portion of which is pivotable into engagement with the outermost convolution of film on the core of the supply reel to thereby rotate the reel in a direction to pay out the film. The belt is trained over a roller which rotates about a fixed axis, and such roller is surrounded by a stationary guide member or flanked by two guide rolls which prevent the film from engaging the belt in the region of the roller so that the belt can engage the film only when its aforementioned portion is pivoted into engagement with the outermost convolution.
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