(19)

(11)

EP 2 861 791 A1

(12)

(43) Date of publication: 22.04.2015 Bulletin 2015/17 (21) Application number: 13728231.5 (22) Date of filing: 23.05.2013

(51) International Patent Classification (IPC):  D04H 3/147(2012.01) D06C 15/00(2006.01) (86) International application number: PCT/FI2013/050566 (87) International publication number: WO 2013/186431 (19.12.2013 Gazette 2013/51)

(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 Designated Extension States: BA ME (30) Priority: 13.06.2012 US 201213495572 (71) Applicant: Ahlstrom Corporation 00100 Helsinki (FI)	(72) Inventors: SHAH, Mithun A. Manchester, Connecticut 06042 (US) ZHAO, Rongguo Simsbury, Connecticut 06070 (US) (74) Representative: Seppo Laine Oy  Itämerenkatu 3 B 00180 Helsinki 00180 Helsinki (FI)