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(11)

EP 4 313 436 A1

(12)

(43) Date of publication: 07.02.2024 Bulletin 2024/06 (21) Application number: 22720519.2 (22) Date of filing: 01.04.2022

(51) International Patent Classification (IPC):  B21B 1/18(2006.01) C21D 8/06(2006.01) B21B 45/00(2006.01) C21D 8/12(2006.01) (52) Cooperative Patent Classification (CPC): B21B 1/18; B21B 45/004; B21B 2265/14; B21B 2261/08; B21B 27/024; B21B 27/035; B21B 2027/103; C21D 9/563; C21D 7/13; C21D 9/525; C21D 1/34; C21D 1/02; C21D 1/42 (86) International application number: PCT/IT2022/050080 (87) International publication number: WO 2022/208568 (06.10.2022 Gazette 2022/40)

(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: 01.04.2021 IT 202100008258 (71) Applicant: Eurolls S.p.A. 33040 Attimis (IT)	(72) Inventors: COLOMBO, Mario 22063 CANTU' (IT) RAILZ, Renato 33100 UDINE (IT) (74) Representative: Petraz, Gilberto Luigi et al GLP S.r.l. Viale Europa Unita, 17133100 Udine Viale Europa Unita, 17133100 Udine (IT)