Matrixing process for the manufacture of molded records
AssigneeRCA Corporation
InventorJohn J. Prusak
Life of this patent
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Abstract
A process improvement is disclosed for use in the matrixing process employed in the manufacture of molded records. In accordance with the disclosure, a narrow texturized band is provided in either the outer or inner unrecorded areas of a matrix or in both areas of a matrix, so that when a replica is electroformed on the matrix the texturized bands will provide sufficient additional grip of the replica to the matrix to prevent premature separation.
Claims6
In the matrixing process employed in the manufacture of molded records in which a flat matrix having a surface comprised of a flat unrecorded bright metal circumferential outer-most zone, an adjacent intermediate recorded zone containing an information track, and an inner unrecorded bright metal zone is electroformed with a metal on said surface to form a replica thereon:
- the improvement which comprises:
- texturizing a circumferential portion of at least one of the unrecorded bright metal zones to provide a circular texturized band of sufficient roughness to prevent premature separation of the replica from the surface of the matrix.
Dependencies are inferred from the claim text.