Synthetic resin material, particularly surface material for phon

Details Synthetic resin material, particularly surface material for phon Synthetic resin material, particularly surface material for phon

1981-09-02

1984-03-06

Michl, Paul R.

Dynamic information storage or retrieval

Storage medium structure

Layered

26099816, 369273, 369288, 425810, 528481, C08J 312

Patent

active

044358024

ABSTRACT:
A surface material for phonograph records prepared by subjecting a copolymeric vinyl resin powder incorporated with a small amount of a stabilizer to the hot blending treatment, melt-kneading the product under heating, cooling the same to ambient temperature to form a mass, granulating the mass, freezing the resulting granules with liquid nitrogen and grinding the frozen granules into powders; and a phonograph record prepared by adhering a film of the surface material to the surface of a record-forming disc, having a photograph or picture printed thereon, by way of fusion under heating and forming a microgroove thereon.

REFERENCES:
patent: 2320112 (1943-05-01), Wiley
patent: 2528611 (1950-11-01), Saffady
patent: 3050433 (1962-08-01), Sakamoto
patent: 3496253 (1970-02-01), Hamilton
patent: 3689078 (1972-09-01), Ban
patent: 3692759 (1972-09-01), Ocone
patent: 3846361 (1974-11-01), Sands
patent: 4069161 (1978-01-01), Pogers
patent: 4213927 (1980-07-01), Alberti
patent: 4299736 (1981-11-01), Datta

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