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(11)

EP 4 295 155 A1

(12)

(43) Date of publication: 27.12.2023 Bulletin 2023/52 (21) Application number: 22705903.7 (22) Date of filing: 16.02.2022

(51) International Patent Classification (IPC):  G01N 33/543(2006.01) G01N 33/68(2006.01) (52) Cooperative Patent Classification (CPC): G01N 33/6854; G01N 33/54388; G01N 2470/04; G01N 2333/165; G01N 2469/20 (86) International application number: PCT/IB2022/051384 (87) International publication number: WO 2022/175842 (25.08.2022 Gazette 2022/34)

(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: 17.02.2021 IT 202100003641 (71) Applicant: Eltek S.p.A. 15033 Casale Monferrato (AL) (IT)	(72) Inventors: MELIOLI, Giovanni 15033 Casale Monferrato (Alessandria) (IT) PIZZI, Marco 15033 Casale Monferrato (Alessandria) (IT) GALLO, Valentina 15033 Casale Monferrato (Alessandria) (IT) SALVI, Michela 15033 Casale Monferrato (Alessandria) (IT) (74) Representative: Gallarotti, Franco  Buzzi, Notaro & Antonielli d'Oulx S.p.A. Corso Vittorio Emanuele ll, 6 10123 Torino 10123 Torino (IT)