| 摘要 |
PURPOSE:To ensure the safe storing of a disk, by providing the projected streak parts at three sides excepting the aperture part of a cartridge main body having a detachable cover. CONSTITUTION:A detachable cover 4 is attached to a cartridge main body 3 having a space 5 to store a video disk 2. The main body 3 is formed by joining a half body 3a having projected streak 3a-1 at three sides each plus a half body 3b having projected streak 3b-1 through a projected streak part. And a side having no projected streak part forms an aperture part 6. The ultrasonic melt-sticking method is applied for the junction between the parts 3a-1 and 3b-1. |
