(19)

(11)

EP 2 652 220 A2

(12)

(88) Date of publication A3: 15.11.2012 (43) Date of publication: 23.10.2013 Bulletin 2013/43 (21) Application number: 11794196.3 (22) Date of filing: 14.12.2011

(51) International Patent Classification (IPC):  E04C 5/01(2006.01) (86) International application number: PCT/EP2011/072746 (87) International publication number: WO 2012/080325 (21.06.2012 Gazette 2012/25)

(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: 15.12.2010 EP 10195106 (71) Applicant: NV Bekaert SA 8550 Zwevegem (BE)	(72) Inventors: LAMBRECHTS, Ann B-8580 Avelgem (BE) VANDERBEKE, Jan B-8520 Kuurne (BE) (74) Representative: Messely, Marc  NV Bekaert SA D.I.E. Bekaertstraat 2 8550 Zwevegem 8550 Zwevegem (BE)