(19)

(11)

EP 0 868 292 A1

(12)

(43) Date of publication: 07.10.1998 Bulletin 1998/41 (21) Application number: 96944199.0 (22) Date of filing: 22.11.1996

(51) International Patent Classification (IPC):  B24D 11/ 00( . ) B29C 47/ 00( . ) (86) International application number: PCT/US1996/018748 (87) International publication number: WO 1997/021536 (19.06.1997 Gazette 1997/26)

(84) Designated Contracting States: CH ES FR GB IT LI SE (30) Priority: 08.12.1995 WO 1995US16215 (71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY St. Paul, Minnesota 55133-3427 (US)	(72) Inventor: KRECH, John, E. Eagan, MN 55122 (US) (74) Representative: Hill, Cecilia Ann  3M Europe, Hermeslaan 7 1831 Diegem 1831 Diegem (BE)