| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable an index card to be reproduced if the card is folded again in a reverse direction due to the fact that a step part acting as a pull-stopper is arranged at the entire width of the index card to have a superior durability and thus the step part merely extends even if an erroneous pulling-out operation is performed. SOLUTION: An index card 33 is bent at a position corresponding to a slant part 23 of a storing case lid 3 to form a step part. This step part is engaged with a protrusion 31 arranged at the case lid 3. Preferably, the index card 33 has two bending lines for forming the step part and a perforation line is arranged at least a part of one bending line of these bending lines.</p> |
