(19)

(11)

EP 2 697 416 A2

(12)

(88) Date of publication A3: 27.12.2012 (43) Date of publication: 19.02.2014 Bulletin 2014/08 (21) Application number: 12771150.5 (22) Date of filing: 29.03.2012

(51) International Patent Classification (IPC):  D04H 1/413(2012.01) B24D 3/00(2006.01) (86) International application number: PCT/US2012/031086 (87) International publication number: WO 2012/141905 (18.10.2012 Gazette 2012/42)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 14.04.2011 US 201161475350 P (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventor: LUDWIG, Bret, W. Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)