| 摘要 |
A cassette which is adapted to contain a length of photographic film wound on a spool and which has an exit-slot from which the film is pulled from the cassette being characterized in that it comprises a scroll control chamber which is formed from a strip of light opague resilient material of such dimensions that it fits into the cassette and is retained therein by means in the cassette, the width of the greater part of the strip being such that it is disabled by means at each end of the cassette from touching the inside wall of the cassette and the width of the lesser part of the strip being such that the end of this part of the strip abuts the inside wall of the cassette, the scroll control chamber being so located in the cassette that it is able to accommodate a length of photographic film wound on a spool, the leading end of the film being led from the spool through the lengthwise gap in the scroll control chamber, then passing between the inside wall of the cassette and the outer wall of that part of the scroll control chamber of greater width to the exit slot of the cassette. |
