| 摘要 |
<p>In a 120- or 220-size roll film, a leader (24) of a light-shielding paper has at least a hole (27) to be engaged with a claw (30) formed in a slit (23) of a spool core. A pair of ribs (32) are formed on an opposite wall of the slit from the claw. The ribs (32) have a height larger than a thickness of the light-shielding paper plus a distance from a peak of the claw (30) to the opposite wall, so that the ribs urges the leader toward the claw, and lets the hole be caught on the claw. The claw has side projections which protrude in an axial direction of the spool core in proximity to the peak of the claw. Guide surfaces of the claw which face entrances of the slit are inclined toward each other, such that the hole (27) caught on the claw (30) is guided to be engaged with the side projections upon the leader being relatively moved away from the slit when the spool is rotated.</p> |
