(19)

(11)

EP 2 635 739 A2

(12)

(88) Date of publication A3: 07.09.2012 (43) Date of publication: 11.09.2013 Bulletin 2013/37 (21) Application number: 11826171.8 (22) Date of filing: 04.11.2011

(51) International Patent Classification (IPC):  D21H 17/67(2006.01) (86) International application number: PCT/FI2011/050975 (87) International publication number: WO 2012/059650 (10.05.2012 Gazette 2012/19)

(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: 05.11.2010 FI 20106168 (71) Applicant: Nordkalk OY AB 21600 Pargas (FI)	(72) Inventors: VIRTANEN, Pentti FI-37630 Valkeakoski (FI) SAASTAMOINEN, Sakari FI-13210 Hämeenlinna (FI) (74) Representative: Wasström, Kathy Mikaela  Seppo Laine Oy Itämerenkatu 3 B FI-00180 Helsinki FI-00180 Helsinki (FI)