Information recording media

Details Information recording media Information recording media

1990-11-27

1992-12-01

Hess, B. Hamilton

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 346 76L, 3461351, 430945, 369282, 369283, 369288, B32B 300

Patent

active

051679965

ABSTRACT:
Improvement in an information recording medium comprising two transparent resin substrates combined with each other, at least one of which has a recording layer provided on the inner surface thereof, two hubs mounted over the center hole of said disc substrates on both sides thereof, each hub having a insertion 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, wherein a notch is provided on the peripheral surface of each hub, adhesive layers are formed at least in the notch, between the inner peripheral surface of the center hole and the outer peripheral surface of the insertion portion of said hubs and between the hubs and a specific photo-curable composition may be used for the adhesive layer.

REFERENCES:
patent: 4230814 (1980-10-01), Crivello
patent: 4903224 (1990-02-01), Namiki et al.
patent: 4944982 (1990-07-01), Kikuchi

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