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(11)

EP 2 038 457 A1

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(43) Date of publication: 25.03.2009 Bulletin 2009/13 (21) Application number: 07797468.1 (22) Date of filing: 15.05.2007

(51) International Patent Classification (IPC):  D01F 1/02(2006.01) D01F 1/10(2006.01) (86) International application number: PCT/US2007/068923 (87) International publication number: WO 2008/002724 (03.01.2008 Gazette 2008/01)

(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: 28.06.2006 US 427094 (71) Applicant: 3M Innovative Properties Company St. Paul MN 55133-3427 (US)	(72) Inventors: WILSON, Bruce, B. Saint Paul, MN 55133-3427 (US) STUMO, Roger, J. Saint Paul, MN 55133-3427 (US) ERICKSON, Stanley, C. Saint Paul, MN 55133-3427 (US) KOPECKY, William, J. Saint Paul, MN 55133-3427 (US) BREISTER, James, C. Saint Paul, MN 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstraße 4 81675 München 81675 München (DE)