(19)

(11)

EP 3 994 958 A1

(12)

(43) Date of publication: 11.05.2022 Bulletin 2022/19 (21) Application number: 21786314.1 (22) Date of filing: 31.01.2021

(51) International Patent Classification (IPC):  H05B 7/10(2006.01) B23K 35/00(2006.01) B23K 9/24(2006.01) C21B 7/14(2006.01) (52) Cooperative Patent Classification (CPC): H05B 7/06 (86) International application number: PCT/IB2021/050756 (87) International publication number: WO 2022/064280 (31.03.2022 Gazette 2022/13)

(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: 26.09.2020 IR 13993005776 (71) Applicant: DANESH PARTO NAGHSH JAHAN CO. Esfehan (IR)	(72) Inventor: RAHIMI, Majid Esfehan 8585165747 (IR) (74) Representative: Caldon, Giuliano et al Gallo & Partners S.r.l. Via Rezzonico, 6 35131 Padova 35131 Padova (IT)