| 摘要 |
A motion picture projector wherein the means which guides the leader of motion picture film during threading from the inlet opening into the range of the claw pull-down includes a resilient braking member which normally bears against a stationary guide member adjacent to the inlet opening. When the leader of a fresh film is inserted into and through the inlet opening, the leader lifts the braking member off the stationary guide member and the braking member thereupon prevents withdrawal of the leader due to its tendency to curl by biasing the leader against the guide member. Once the leader reaches the pull-down so that the latter begins to transport the film in stepwise fashion, the resulting tensioning of the film causes the braking member to move further away from the stationary guide member and to bear upon the tensioned film so as to compensate for the fact that the supply reel from which the film is being withdrawn normally rotates without stoppage while the pull-down transports the film stepwise. |
