| 摘要 |
<p>In a film cassette (1), a spool core (23) is supported for rotation in an unwinding direction to thrust a leader section (37) of a filmstrip (F) coiled about the spool core through a film passageway (25) to the exterior of the cassette. A pair of flanges (41, 43) are arranged in spaced relation along the spool core (23) to overlie opposite longitudinal edges (53, 55) of the filmstrip (F) to radially confine the filmstrip. The flanges (41, 43) are adapted to permit the longitudinal film edges (51, 53) to force the flanges farther apart to allow the filmstrip (F) to escape the confinement of the flanges to permit the leader section (37) to be thrust outside the cassette (1). According to the invention, the leader section (37) is relieved (53', 55') to permit its forward edge (63) to be thrust clear of a light-trapping means (31) in the film passageway (25) before the longitudinal film edges (53, 55) begin to force the flanges apart, whereby when the spool core (23) is rotated in the unwinding direction any resistance the light-trapping means and the flanges present to film movement is more easily overcome. <IMAGE></p> |
