(19)

(11)

EP 2 035 188 A1

(12)

(43) Date of publication: 18.03.2009 Bulletin 2009/12 (21) Application number: 07798549.7 (22) Date of filing: 14.06.2007

(51) International Patent Classification (IPC):  B24D 7/00(2006.01) (86) International application number: PCT/US2007/071189 (87) International publication number: WO 2007/147039 (21.12.2007 Gazette 2007/51)

(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 LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 15.06.2006 JP 2006165745 (71) Applicant: 3M Innovative Properties Company St. Paul MN 55133-3427 (US)	(72) Inventor: YAMAHARA, Michihiro Setagaya-ku, Tokyo 158-8583 (JP) (74) Representative: Hill, Cecilia Ann  Office of Intellectual Property Counsel, 3M Europe S.A./N.V., Hermeslaan 7 1831 Diegem 1831 Diegem (BE)