(19)
(11) EP 0 337 716 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.09.1990 Bulletin 1990/38

(43) Date of publication A2:
18.10.1989 Bulletin 1989/42

(21) Application number: 89303542.8

(22) Date of filing: 11.04.1989
(51) International Patent Classification (IPC)4: H01F 1/18, H01F 27/24, H01F 41/02
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 11.04.1988 JP 88694/88

(71) Applicant: MITSUI PETROCHEMICAL INDUSTRIES, LTD.
Tokyo 100 (JP)

(72) Inventors:
  • Matsuoka, Takashi
    Ichihara-shi Chiba-ken (JP)
  • Furihata, Toshikazu
    Ichihara-shi Chiba-ken (JP)
  • Ueda, Yasushi
    Ichihara-shi Chiba-ken (JP)

(74) Representative: Senior, Alan Murray et al
J.A. KEMP & CO., 14 South Square, Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)


(56) References cited: : 
   
       


    (54) Magnetic ribbon and magnetic core


    (57) Disclosed are a magnetic ribbon on at least one surface of which fine particles formed of nonmagnetic inorganic substance having insulating properties are attached and a magnetic core around which this magnetic ribbon is wound or on which it is laminated. The fine particles serve as a spacer to form a layer of air between adjacent layers of the magnetic ribbon.







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