Method for forming protective layer on a flexible magnetic disc

Details Method for forming protective layer on a flexible magnetic disc Method for forming protective layer on a flexible magnetic disc

1984-10-09

1987-03-03

Robinson, Ellis P.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

360135, 427 541, 427128, 427131, 428694, 428900, 428 65, 428 64, G11B 570

Patent

active

046474730

ABSTRACT:
A method for forming protective layer on a surface portion surrounding the edge of a central aperture of a flexible magnetic disc sheet is described, comprising providing a radiation polymerizable composition on a surface portion surrounding the edge of the central aperture of the flexible magnetic disc sheet by screen printing, and hardening the composition by exposure to radiation; a flexible magnetic disc is also described, wherein a protective layer by the foregoing method is provided, with said protective layer having an inner diameter larger than the diameter of the aperture of the disc sheet and an outer diameter smaller than the diameter of the aperture of a jacket enclosing the disc sheet.

REFERENCES:
patent: 3466156 (1969-09-01), Peters
patent: 3681225 (1972-08-01), Gemma
patent: 4239828 (1980-12-01), Knope
patent: 4335183 (1982-06-01), Hosaka
patent: 4368239 (1983-01-01), Nakajima
patent: 4387114 (1983-06-01), Conner
patent: 4404247 (1983-09-01), Dominquez-Urgvette
patent: 4434310 (1984-02-01), Nakajima
patent: 4486500 (1984-12-01), Naruo
patent: 4523246 (1985-06-01), Okuzawa
patent: 4539220 (1985-09-01), Martinelli
patent: 4578299 (1986-03-01), Kato
patent: 4581270 (1986-04-01), Kato

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