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EP 2 235 301 A1

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(43) Date of publication: 06.10.2010 Bulletin 2010/40 (21) Application number: 08870176.8 (22) Date of filing: 29.10.2008

(51) International Patent Classification (IPC):  E04H 17/04(2006.01) B21F 27/02(2006.01) D04B 21/12(2006.01) B21F 27/00(2006.01) E21D 11/15(2006.01) (86) International application number: PCT/EP2008/064630 (87) International publication number: WO 2009/086961 (16.07.2009 Gazette 2009/29)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 04.01.2008 EP 08150040 (71) Applicant: NV Bekaert SA 8550 Zwevegem (BE)	(72) Inventors: VIDAL RUDLOFF, Guillermo Alejan Talcahuano (CL) ACUÑA MARTINEZ, Cristián Talcahuano (CL) PAREDES MONTECINOS, Hector Talcahuano (CL) (74) Representative: Krishnan, Sri  NV Bekaert SA Bekaertstraat 2 BE-8550 Zwevegem BE-8550 Zwevegem (BE)