| 摘要 |
Apparatus for processing or handling film such as in projection systems and the like, and particularly apparatus for the contact duplication of film, in which the shutter movement is film speed responsive, that is, the shutter position is determined by the speed of film movement through the exposure station so that the shutter closes when the speed of film movement drops to a level where heat-damage might commence to the film due to prolonged dwell in the exposure station where it is exposed to heat and light from the projection lamp. The apparatus also automatically dims the projection lamp when the shutter is closed, thereby increasing the life of the lamp. The apparatus further includes a pressure roll for engaging the film to obtain good contact between the films during exposure. The pressure roll is automatically removable from contact with the film when the shutter is closed, so as to facilitate feeding of a new film into the apparatus.
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