Information recording discs

Details Information recording discs Information recording discs

1992-10-19

1993-11-16

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Layered

369284, 346137, 3461351, 430495, 430945, 428 65, G01D 1534, G11B 724, G11B 726

Patent

active

052630161

ABSTRACT:
An information recording disc including a plurality of disc substrates (2), at least one of which has a recording medium containing layer (1), two pieces of hubs mounted over the center hole of said disc substrates on both sides thereof, each hub having a portion to be inserted into said center hole and a flange portion to cover a portion of said disc substrate in the vicinity of said center hole, and an adhesive layer (13, 14) formed between said hubs and said disc substrates and between said two hubs. An adhesive layer (7) laminates the substrates (2a, 2b) to one another.

REFERENCES:
patent: 4710913 (1987-12-01), Matsushima et al.
patent: 4720826 (1988-01-01), Sugiyama et al.
patent: 4865949 (1989-09-01), Yamamuro et al.
patent: 4870429 (1989-09-01), Fujita et al.
patent: 4911968 (1990-03-01), Higasihara et al.
patent: 4917751 (1990-04-01), Olta et al.

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