(19)

(11)

EP 1 224 062 A1

(12)

(43) Date of publication: 24.07.2002 Bulletin 2002/30 (21) Application number: 00972117.6 (22) Date of filing: 13.10.2000

(51) International Patent Classification (IPC)7: B24D 3/32, B24D 18/00, B24D 11/00 (86) International application number: PCT/US0028/289 (87) International publication number: WO 0128/741 (26.04.2001 Gazette 2001/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.10.1999 US 420968 20.10.1999 US 421807 (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventors: BEARDSLEY, Kris, A. Saint Paul, MN 55133-3427 (US) SANDERS, Rufus, C., Jr. Saint Paul, MN 55133-3427 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 81675 München 81675 München (DE)