(19)

(11)

EP 0 255 822 A1

(12)

(43) Date of publication: 17.02.1988 Bulletin 1988/07 (21) Application number: 86906383.0 (22) Date of filing: 22.10.1986

(51) International Patent Classification (IPC):  G11B 33/ 08( . ) (86) International application number: PCT/GB1986/000650 (87) International publication number: WO 1987/004557 (30.07.1987 Gazette 1987/17)

(84) Designated Contracting States: BE DE FR GB IT NL SE (30) Priority: 24.01.1986 GB 19860001732 (71) Applicant: LINN PRODUCTS LIMITED Glasgow G45 9SN (GB)	(72) Inventor: DALGLEISH, Martin Glasgow G46 (GB) (74) Representative: Wotherspoon, Graham  FITZPATRICKS 4 West Regent Street Glasgow G2 1RS Scotland Glasgow G2 1RS Scotland (GB)