(19)

(11)

EP 0 205 533 A1

(12)

(43) Date of publication: 30.12.1986 Bulletin 1986/52 (21) Application number: 86900215.0 (22) Date of filing: 20.12.1985

(51) International Patent Classification (IPC):  G11B 7/ 004( . ) G11C 13/ 04( . ) (86) International application number: PCT/GB1985/000595 (87) International publication number: WO 1986/003875 (03.07.1986 Gazette 1986/14)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 21.12.1984 GB 19840032563 (71) Applicant: BANKS, Paul Jerome Bowdon, Cheshire WA14 3HN (GB)	(72) Inventor: BANKS, Paul Jerome Bowdon, Cheshire WA14 3HN (GB) (74) Representative: Berry, Neil  17 St. Ann's Square Manchester M2 7PW Manchester M2 7PW (GB)