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(11)

EP 1 409 201 A1

(12)

(43) Date of publication: 21.04.2004 Bulletin 2004/17 (21) Application number: 02746972.5 (22) Date of filing: 12.07.2002

(51) International Patent Classification (IPC)7: B24D 3/28, B24D 3/34, B24B 37/04 (86) International application number: PCT/US2002/021940 (87) International publication number: WO 2003/008151 (30.01.2003 Gazette 2003/05)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.07.2001 US 910425 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventor: TIETZ, James, V. Saint Paul, MN 55133-3427 (US) (74) Representative: Hilleringmann, Jochen, Dipl.-Ing. et al Patentanwältevon Kreisler-Selting-Werner,Bahnhofsvorplatz 1 (Deichmannhaus) 50667 Köln 50667 Köln (DE)