| 摘要 |
A photo film cassette contains a spool rotatably, on which photo film is wound as a roll with a leading end wound on the outside. A cassette shell has a passage port, through which the photo film is passed. A single separating claw is disposed in an inner position in the passage port, separates the leading end from the photo film roll during rotation of the spool to unwind the photo film, and exits the leading end through the passage port. The claw is so positioned as to avoid contact with a second outermost turn of the photo film roll. The photo film includes support material, which supports a photosensitive emulsion layer, and has reliably high stiffness, which remains sufficient even under excessively high humidity. The support material is of stiff resinous film which can have a small thickness from 40 to 100 mu m. A trailing end of the photo film is secured to the spool. Ridges are formed along two lengthwise edges of the photo film and in a partial range within a trailer, and stiffen the photo film. Likewise, embossed patterns are disposed on a trailer, and reduce friction between turns of the photo film wound as roll.
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