Flexible magnetic disc with a two layer protective coating which

Details Flexible magnetic disc with a two layer protective coating which Flexible magnetic disc with a two layer protective coating which

1990-06-12

1992-02-04

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 64, 428694, 428900, 428212, 428323, 428336, 428480, 428 9, 360133, 360135, 427 44, 427 541, 427128, 427129, 427130, G11B 2300

Patent

active

050859110

ABSTRACT:
A novel flexible magnetic disc is provided comprising a protective layer on the periphery of a central hole, wherein the protective layer comprises of two layers, the lower one of the two layers being a composition mainly composed of a printing ink and the upper one being a composition mainly composed of a resin obtained by irradiating a radiation-polymerizable compound with radiation so that it cures.

REFERENCES:
patent: 4326001 (1982-04-01), Sachs et al.
patent: 4578299 (1986-03-01), Kato et al.
patent: 4581270 (1986-04-01), Kato et al.
patent: 4652480 (1987-03-01), Kato et al.
patent: 4671978 (1987-06-01), Kato et al.
patent: 4696846 (1987-09-01), Kato et al.
patent: 4699835 (1987-10-01), Takeuchi et al.
patent: 4721640 (1988-01-01), Kato et al.

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