| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To form a structural material of a light shielding box for a photosensitive material from corrugated cardboard, to improve bendability, and to ensure the light shielding effect of corner parts. <P>SOLUTION: The light shielding box for a photosensitive material is a boxy case formed by bending an extended body 22. The expanded body 22 consists of a bottom part 30, side wall parts 31-34 which solidly extend from the four sides of the bottom part 30, and creasing parts 35-38 formed along the boundary between the bottom part 30 and the side wall parts 31-34. The creasing parts 35-38 have a plurality of grooves having an acute angle formed by being creased with a creasing blade having a plurality of edges. When the side wall parts 31-34 are bent along the grooves in the creasing parts 35-38, good bendability is ensured and the side wall parts can be bent at right angles to the bottom part. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
