Method of making a laminated recorded disc

Details Method of making a laminated recorded disc Method of making a laminated recorded disc

1982-01-26

1983-06-28

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming sound grooves in records

Die pressing disk type records

264322, 264325, 2643287, 425810, B29D 1700

Patent

active

043904874

ABSTRACT:
A laminated recorded disc of the type having a core material surrounded by a surface layer of a conductive material is made from a preform having a core surrounded by the conductive material. The preform is made in a mold in which the conductive material is first injected into the mold and then the core material is injected into the conductive material. The disc is made from the preform by placing the preform between the platens of a compression mold and closing the heated platens against the preform. The heated platens heat and apply pressure to the preform to cause the materials of the preform to flow radially outwardly until the materials fill the mold cavity formed by the completely closed platens.

REFERENCES:
patent: 1488253 (1924-03-01), Howbrigg
patent: 2452821 (1948-11-01), Wood
patent: 2996764 (1961-08-01), Ross
patent: 3247298 (1966-04-01), Utiger
patent: 3339240 (1967-09-01), Corbett
patent: 3378612 (1968-04-01), Dietz
patent: 3584094 (1971-06-01), Rock
patent: 3739052 (1973-06-01), Ayres
patent: 3825637 (1974-07-01), Robin
patent: 3901958 (1975-08-01), Doll
patent: 3921856 (1975-11-01), Langecker
patent: 4213927 (1980-07-01), Alberti
patent: 4248818 (1981-02-01), Elizabeth
patent: 4315878 (1982-02-01), Van Dorer
patent: 4334849 (1982-06-01), Bock
S. S. Young et al., A Basic Experimental Study of Sandwich Injection Molding and Sequential Injection, Polymer Engineering & Science, Aug. 1980, vol. 20, No. 12, pp. 798-804.

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