(19)

(11)

EP 1 765 553 A1

(12)

(43) Date of publication: 28.03.2007 Bulletin 2007/13 (21) Application number: 05767048.1 (22) Date of filing: 24.06.2005

(51) International Patent Classification (IPC):  B24D 3/34(2006.01) (86) International application number: PCT/US2005/022756 (87) International publication number: WO 2006/017008 (16.02.2006 Gazette 2006/07)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 09.07.2004 JP 2004203510 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: OKA, Hitoshi, Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)