(19)

(11)

EP 0 897 578 A1

(12)

(43) Date of publication: 24.02.1999 Bulletin 1999/08 (21) Application number: 97923366.0 (22) Date of filing: 29.04.1997

(51) International Patent Classification (IPC):  G11B 20/ 10( . ) (86) International application number: PCT/SE1997/000720 (87) International publication number: WO 1997/043762 (20.11.1997 Gazette 1997/50)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IT LI LU MC NL PT (30) Priority: 11.05.1996 SE 19960001813 (71) Applicant: Ahrne, Tomas 122 45 Enskede (SE)	(72) Inventor: Ahrne, Tomas 122 45 Enskede (SE) (74) Representative: Hammar, Ernst  Albihns Patentbyra Stockholm AB P.O.Box 5581 S-114 85 Stockholm S-114 85 Stockholm (SE)