(19)

(11)

EP 1 968 767 A2

(12)

(88) Date of publication A3: 23.08.2007 (43) Date of publication: 17.09.2008 Bulletin 2008/38 (21) Application number: 06847577.1 (22) Date of filing: 13.12.2006

(51) International Patent Classification (IPC):  B24B 23/00(2006.01) (86) International application number: PCT/US2006/047427 (87) International publication number: WO 2007/078743 (12.07.2007 Gazette 2007/28)

(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 NL PL PT RO SE SI SK TR (30) Priority: 21.12.2005 US 314799 (71) Applicant: 3M Innovative Properties Company St. Paul MN 55133-3427 (US)

(72) Inventors: CYBULSKI, Eric R. Saint Paul, Minnesota 55133-3427 (US) SIMMERS, Ryan Patrick Saint Paul, Minnesota 55133-3427 (US) KIRSCHHOFFER, Jon A. Saint Paul, Minnesota 55133-3427 (US) OWEN, Ian R. Saint Paul, Minnesota 55133-3427 (US) LISE, Jonathan M. Saint Paul, Minnesota 55133-3427 (US) TURCH, Steven E. Saint Paul, Minnesota 55133-3427 (US) PETERSEN, John G. Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Wilhelm, Stefan  3M Deutschland GmbH Carl-Schurz-Strasse 1 41453 Neuss 41453 Neuss (DE)