(19)

(11)

EP 2 661 525 A1

(12)

(43) Date of publication: 13.11.2013 Bulletin 2013/46 (21) Application number: 12732144.6 (22) Date of filing: 05.01.2012

(51) International Patent Classification (IPC):  E04C 2/38(2006.01) E04B 2/14(2006.01) (86) International application number: PCT/FI2012/050010 (87) International publication number: WO 2012/093203 (12.07.2012 Gazette 2012/28)

(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: 07.01.2011 FI 20115021 (71) Applicant: Nordiskt Material AB 22100 Mariehamm (FI)	(72) Inventor: NORDLUND, Lennart FI-22100 Mariehamn (FI) (74) Representative: Kupiainen, Juhani Kalervo  IPR Partners Oy Bulevardi 2-4 00120 Helsinki 00120 Helsinki (FI)