(19)

(11)

EP 3 649 263 A1

(12)

(43) Date of publication: 13.05.2020 Bulletin 2020/20 (21) Application number: 18749548.6 (22) Date of filing: 03.07.2018

(51) International Patent Classification (IPC):  C14B 1/40(2006.01) C14B 3/00(2006.01) C14B 1/42(2006.01) (86) International application number: PCT/IB2018/054918 (87) International publication number: WO 2019/008510 (10.01.2019 Gazette 2019/02)

(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: 04.07.2017 IT 201700074937 (71) Applicant: Erretre S.p.A. 36071 Arzignano (Vicenza) (IT)	(72) Inventor: GALIOTTO, Antonio 36072 Chiampo (IT) (74) Representative: Contadin, Giorgio et al Notarbartolo & Gervasi S.p.A. Corso di Porta Vittoria, 9 20122 Milano 20122 Milano (IT)