| 摘要 |
PURPOSE:To prepare efficiently and inexpensively a containment case for recording medium. CONSTITUTION:When a raw sheet is formed of a molten plastic, a channel 32 for bending is formed and a plastic raw sheet 30 on the surface of which the channel 32 for bending corresponding to a plurality of blanks is treated, is prepd. It is therefore possible to punch at the same time a plurality of blanks with the channel 32 for bending from the raw sheet 30 on the same line. |
