| 摘要 |
A film spool comprising a barrel and transverse end flanges having inwardly facing or opposed surfaces that define the film-storage area. A circumferentially extending ridge, radially spaced from the barrel, is formed on the inwardly facing surface of each flange and projects toward the ridge on the inwardly facing surface of the other flange. The distance between the ridges on the two flanges is slightly less than the width of film to be wound on the spool so that the ridges hold the film in a supply roll on the spool, but the leading end of the film may be drawn between the ridges with a uniform, moderate pulling force. A spool of the invention may be molded as an integral body, with the edge-portions of the flanges being pivotable in a toggle-like action from the position in which they are molded to the position in which the ridges have the described spacing.
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