(19)

(11)

EP 2 785 920 A1

(12)

(43) Date of publication: 08.10.2014 Bulletin 2014/41 (21) Application number: 12852870.0 (22) Date of filing: 28.11.2012

(51) International Patent Classification (IPC):  E02D 5/08(2006.01) E02D 5/14(2006.01) (86) International application number: PCT/FI2012/051173 (87) International publication number: WO 2013/079789 (06.06.2013 Gazette 2013/23)

(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: 28.11.2011 FI 20116192 (71) Applicant: Rautaruukki Oyj 00810 Helsinki (FI)	(72) Inventor: VESAMÄKI, Hannu FI-00810 Helsinki (FI) (74) Representative: Kolster Oy Ab  Iso Roobertinkatu 23 PO Box 148 00121 Helsinki 00121 Helsinki (FI)