Process for producing a disc-shaped information carrier which ha

Details Process for producing a disc-shaped information carrier which ha Process for producing a disc-shaped information carrier which ha

1978-04-17

1979-12-18

Esposito, Michael F.

Coating processes

Electrical product produced

Welding electrode

101 32, 264 25, 264107, 274 416R, 3461351, 427209, 427277, 427302, 427304, 427358, 427404, 427409, B05D 306

Patent

active

041795326

ABSTRACT:
A disc-shaped information carrier for high-density storage, in particular for video signals, has the information provided on both sides of the carrier and stored in the form of a beam-relfecting surface structure which is covered by a layer of translucent material. A disc-shaped base element is formed by injection molding, pressing, stamping or the like to exhibit a surface structure corresponding to the information to be stored on both sides thereof. Each side has a thin metallic coating applied thereto which maintains the same surface profile and the information structure is protected on each side with a layer of transparent material.

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patent: 3260612 (1966-07-01), Dulmage et al.
patent: 3265776 (1966-08-01), Henkes, Jr.
patent: 3430996 (1969-03-01), Gregg
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patent: 3893127 (1975-07-01), Kaplan et al.
patent: 3968326 (1976-07-01), Nosker et al.
patent: 4018937 (1977-04-01), Levine et al.
patent: 4020278 (1977-04-01), Carre et al.
patent: 4027330 (1977-05-01), Maslowski et al.
patent: 4069360 (1978-01-01), Yanagisawa et al.

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