(19)

(11)

EP 3 829 745 A2

(12)

(88) Date of publication A3: 14.05.2020 (43) Date of publication: 09.06.2021 Bulletin 2021/23 (21) Application number: 19762482.8 (22) Date of filing: 01.08.2019

(51) International Patent Classification (IPC):  B01D 46/00(2006.01) B01D 46/52(2006.01) B01D 46/10(2006.01) (86) International application number: PCT/IB2019/056555 (87) International publication number: WO 2020/026179 (06.02.2020 Gazette 2020/06)

(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: 03.08.2018 IT 201800007854 (71) Applicant: Officine Metallurgiche G. Cornaglia S.p.A. 10092 Beinasco (TO) (IT)	(72) Inventors: BINI, Simone Pietro 10092 Beinasco (TO) (IT) CORNAGLIA, Umberto 10092 Beinasco (TO) (IT) GOTELLI, Mauro 10092 Beinasco (TO) (IT) (74) Representative: Robba, Pierpaolo  Interpatent S.R.L. Via Caboto, 35 10129 Torino 10129 Torino (IT)