Apparatus for molding recorded discs

Details Apparatus for molding recorded discs Apparatus for molding recorded discs

1980-06-26

1981-11-24

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

425408, 425810, B29D 1700, B29C 300

Patent

active

043021751

ABSTRACT:
An apparatus for molding recorded discs includes a pair of mold plates having opposed surfaces on which stampers can be mounted. A separate center hold down member fits into an opening in each mold plate to secure the inner edge of the stamper to the mold plate. At least one of the center hold down members has indicia forming means on its surface, either as raised projections or indentations in the surface, to form a desired indicia in the surface of the disc as it is being molded.

REFERENCES:
patent: 1345115 (1920-06-01), Aylsworth et al.
patent: 3221367 (1965-12-01), Cavalier
patent: 3354509 (1967-11-01), Ammondson
patent: 3474494 (1969-10-01), Damm et al.
patent: 3945790 (1976-03-01), Puech

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