| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk cartridge which can eliminate generation of burrs in a cartridge case and consequently prevent deterioration of disk-recording and reproduction characteristics. SOLUTION: In the disk cartridge, resin is injected into a cavity 3, in a state with leading end faces of push pins 4 retreated slightly from the surface of a fixed mold, thereby forming projecting parts 5a to the inner face of a cartridge case 5 at a position opposite to the push pins of an area opposite to a recording disk 11. The push pins will not sink in the cartridge case 5, and as a result generation of burrs can be suppressed.
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