Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1978-07-20
1980-02-12
Lesmes, George F.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
1791003V, 346137, 3461351, 3581285, 428332, 428339, 428913, 428442, 428463, 428520, 428522, 428412, G11B 724, B32B 2708, B32B 2730
Patent
active
041884337
ABSTRACT:
The invention relates to a disk-shaped record carrier, for example a video plate, which is provided on one side or on both sides with a radiation-reflecting surface structure in the form of an information track consisting of blocks and pits on which a reflecting layer of metal is provided. The plate can be read optically. According to the invention the reflecting metal layer is provided with a cover layer which is formed by a transparent plate which is connected to the metal surface by means of a radiation-curable lacquer. The lacquer is preferably a U.V. curing lacquer and contains a protic mixture of acrylic acid esters. The transparent plate is also preferably manufactured from a transparent synthetic resin and has a thickness of 200 .mu.m.
REFERENCES:
patent: 3113179 (1963-12-01), Glenn
patent: 3971874 (1976-07-01), Ohta et al.
patent: 4020278 (1977-04-01), Carre et al.
patent: 4052280 (1977-10-01), McGinnis
patent: 4057831 (1977-11-01), Jacobs et al.
patent: 4069487 (1978-01-01), Kasai et al.
patent: 4126726 (1978-11-01), Soeding
Dijkstra Rinse
Lippits Gerardus J. M.
Van Den Broek Arnoldus J. M.
Lesmes George F.
Spain Norman N.
Thomas Alexander S.
U.S. Philips Corporation
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