OPTICAL DISK AND ITS MOLDING METAL DIE

PROBLEM TO BE SOLVED: To prevent mold crack from occurring in the center hole part of an optical disk at the time of loading it to a player or a housing. SOLUTION: This optical disk and its molding metal die have an R shape or chamfered shape at the corner parts of one side or both sides of the cent...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIOKA TOSHIYUKI, KURISU MASABUMI, KOZONO RIICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent mold crack from occurring in the center hole part of an optical disk at the time of loading it to a player or a housing. SOLUTION: This optical disk and its molding metal die have an R shape or chamfered shape at the corner parts of one side or both sides of the center hole of the optical disk and a mechanism for forming the above-mentioned shape inside the molding die. COPYRIGHT: (C)2004,JPO