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(11)

EP 1 732 734 A1

(12)

(43) Date of publication: 20.12.2006 Bulletin 2006/51 (21) Application number: 05723469.2 (22) Date of filing: 22.02.2005

(51) International Patent Classification (IPC):  B24D 11/02(2006.01) B24D 9/08(2006.01) B24B 23/00(2006.01) (86) International application number: PCT/US2005/005572 (87) International publication number: WO 2005/102608 (03.11.2005 Gazette 2005/44)

(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: 08.04.2004 US 821068 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: FISHER, Daniel J., 3M Center Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Voortmans, Gilbert J.L.  3M Europe S.A./N.V. OIPC Hermeslaan 7 1831 Diegem 1831 Diegem (BE)