Process for producing information carrying discs

Details Process for producing information carrying discs Process for producing information carrying discs

B - Operations, Transporting

29

D

18/99

B29D 17/00 (2006.01) B29C 43/02 (2006.01)

Patent

CA 1112408

ABSTRACT OF THE DISCLOSURE: The process according to the invention uses a matrix engraved by any means, the tracks being perfectly centered on this matrix in relation to a center of rotation. The matrix is placed in a vacuum chamber on a supporting axis capable of rotating and is coated over its entire surface with a poly- merisable material which is free from air bubbles and which does not adhere to the constituent material of the matrix. A substrate previously drilled at its center, balanced and coated with a material to which the polymerisable material adheres, is placed on the supporting shaft and held at a distance from the matrix. The vacuum is established in the chamber and the substrate is brought into contact with the matrix. On completion of polymerisation outside or inside the chamber, the substrate carrying the moulded resin is readily separated from the matrix.

307881

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