(19)

(11)

EP 0 446 227 A1

(12)

(43) Date of publication: 18.09.1991 Bulletin 1991/38 (21) Application number: 89912707.0 (22) Date of filing: 07.11.1989

(51) International Patent Classification (IPC):  G11B 15/ 68( . ) (86) International application number: PCT/US1989/004884 (87) International publication number: WO 1990/005362 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 10.11.1988 US 19880269389 10.11.1988 US 19880269391 (71) Applicant: EXABYTE CORPORATION Boulder, CO 80301 (US)	(72) Inventors: HERGER, Zoltan, L. Boulder, CO 80303 (US) NEJEZCHLEB, Vladimir Boulder, CO 80501 (US) SILLS, Richard, E. Longmont, CO 80501 (US) (74) Representative: Mittler, Enrico  c/o Marchi & Mittler s.r.l. Viale Lombardia, 20 I-20131 Milano I-20131 Milano (IT)