Method and apparatus for manufacturing compact discs having...

G - Physics – 11 – B

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G11B 7/26 (2006.01)

Patent

CA 2208354

An apparatus for manufacturing compact discs having a non-circular outer profile includes a means for imprinting digital information in an annular region on the under face of a compact disc blank such that an outer limit of the annular region does not extend beyond the innermost reach of the edge of the compact disc in its final shape, means for forming a first alignment means on the blank, means for applying a label to the upper face of the blank, means for orienting the blank on a shaping apparatus by way of the first alignment means with respect to a third alignment means on the shaping apparatus, means for securing the blank against rotation with respect to the shaping apparatus, and means for shaping the compact disc into its final shape by removing portions of the blank.

La présente invention concerne un dispositif et un procédé de fabrication de disques compacts (2) à profil extérieur (8) autre que rond. Le procédé consiste à imprimer les informations numériques dans une région annulaire (12) de la face inférieure d'un flanc (36) de disque compact de façon que la limite extérieure (14) de la région annulaire (12) ne s'étende pas au-delà de la zone la plus intérieure (16) du bord du disque compact (2) sous sa forme définitive, à constituer un premier repère de calage (20a, 20b) sur le flanc, à apposer une étiquette sur la face supérieure du flanc (36), à orienter le flanc (36) sur un banc de fabrication (36) par mise en coïncidence du premier repère de calage (20a, 20b) avec un repère de calage (34a, 34b) sur le banc de fabrication (26), à fixer le flanc (36) de façon qu'il ne puisse pas tourner par rapport au banc (26), et à donner au flanc (36) sa forme définitive par l'élimination de parties du flanc au moyen d'une meule (44) coopérant avec un gabarit (38) de façon à produire la forme finale.

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