Method of making picture phonograph record

Details Method of making picture phonograph record Method of making picture phonograph record

1979-06-29

1980-07-22

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

Die pressing disk type records

274 42P, 425810, B29D 1700

Patent

active

042139279

ABSTRACT:
A picture phonograph record and method of making the same having an imprinted core sheet sandwiched between transparent layers one of which comprises a relatively thin preformed plastic foil and the other of which is a relatively rigid and thick layer dispersed radially over the core sheet from a hot fluent lump of plastic positioned between heated pressurized mold platens. Sound tracks are impressed onto the face of one or both plastic layers concurrently with the extrusion of the lump to form the thick plastic layer. At least the thicker and usually both layers become inseparably adherent to the adjacent face of the core sheet as an incident of the assembly and sound track impressing operation.

REFERENCES:
patent: 1050932 (1913-01-01), Emerson
patent: 3247298 (1966-04-01), Utigen
patent: 3584094 (1971-06-01), Rock
patent: 3662051 (1972-05-01), Harlow
patent: 3687769 (1972-08-01), Dague

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