Method for the manufacture of record stampers

Details Method for the manufacture of record stampers Method for the manufacture of record stampers

1984-04-30

1985-02-19

Tufariello, Thomas

Chemistry: electrical and wave energy

Processes and products

C25D 110

Patent

active

045003939

ABSTRACT:
A method is provided for the manufacture of record stampers having electroformed inner and outer edges of a predetermined configuration. In the disclosed method, a flat matrix is formed from a ductile metal. The inner and outer sections of the matrix are shaped into a form which is the mirror image of inner and outer edges desired be formed on the stamper. A metal, preferably a relatively hard metal, is then electroformed on the surface of the matrix in a preselected thickness required for the stamper. The resulting stamper is then stripped from the surfaces of the matrix. The stamper which is obtained will have electroformed inner and outer edges of the predetermined configurations.

REFERENCES:
patent: 2092830 (1937-09-01), Hunter et al.
patent: 2491068 (1949-12-01), Adams
patent: 3227634 (1966-01-01), Rinzema et al.
patent: 3431333 (1969-03-01), Fiornascente
patent: 4431487 (1984-02-01), Weaver

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