| 摘要 |
PURPOSE:To eliminate the protrusion of fibers and prevent the occurrence of errors, by avoiding the installation of an inter-liner at the area near a jacket hole on the inner surface of a jacket. CONSTITUTION:In an exploded view of a jacket, belt-shaped inter-liners 4 are set apart from a slit 6 plus hole parts 5 and 7 and in arrangement at both sides of a sheet 3. In such constitution, the both sides of a disk 11 is held between a pair of inter-liners 4A provided on both inner surfaces to protect the surface of the disk. At the same time, the liners 4A are set apart from the slit 6 to eliminate the protrusion of fibers. Furthermore the cutting gain is high owing to the belt-shaped form of the liner 4A, and the working efficiency is also increased since such liners 4A are provided at both sides of the sheet 3. |
