(19)

(11)

EP 1 663 580 A1

(12)

(43) Date of publication: 07.06.2006 Bulletin 2006/23 (21) Application number: 04779781.6 (22) Date of filing: 03.08.2004

(51) International Patent Classification (IPC):  B24D 11/00(1968.09) (86) International application number: PCT/US2004/024829 (87) International publication number: WO 2005/035199 (21.04.2005 Gazette 2005/16)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 23.09.2003 US 668799 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventors: CULLER, Scott, R. Saint Paul, MN 55133-3427 (US) HAAS, John, D. Saint Paul, MN 55133-3427 (US) SIMONS, Jeffrey, R. Saint Paul, MN 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)