Apparatus for facilitating engagement between film and film actuated pull-strip

摘要

Apparatus for facilitating the achievement of locking engagement between the film strip contained in a film cassette of the type in which the film may be exposed, processed and projected without removal from the cassette, and a pull-strip for removing a tear-tab closure initially sealing a supply of processing fluid within the cassette. The supply end of the film strip contains a bottle-shaped aperture through which a tapered latching tongue provided at the free end of the pull-strip passes upon initiation of rewind after exposure. The supply reel hub is provided with a latching tongue receiving surface lying below the film receiving surface of the hub which, upon continued advancement of the film strip, receives and supports the latching tongue to fold it back upon itself.