(19)

(11)

EP 3 642 382 A1

(12)

(43) Date of publication: 29.04.2020 Bulletin 2020/18 (21) Application number: 18729895.5 (22) Date of filing: 28.05.2018

(51) International Patent Classification (IPC):  C23C 10/60(2006.01) B21C 1/00(2006.01) C23C 10/30(2006.01) (86) International application number: PCT/EP2018/063955 (87) International publication number: WO 2018/233986 (27.12.2018 Gazette 2018/52)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 22.06.2017 EP 17177407 (71) Applicant: NV Bekaert SA 8550 Zwevegem (BE)	(72) Inventor: AGRESTI, Simone 59100 Prato (IT) (74) Representative: Messely, Marc  NV Bekaert SA IPD - PC6030 Bekaertstraat 2 8550 Zwevegem Bekaertstraat 2 8550 Zwevegem (BE)