(19)

(11)

EP 4 739 417 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24755293.8 (22) Date of filing: 13.08.2024

(51) International Patent Classification (IPC):  B01D 19/00(2006.01) B23K 26/38(2014.01) C02F 1/20(2023.01) B23K 26/70(2014.01) (52) Cooperative Patent Classification (CPC): B23K 26/703; B23K 26/38; B23K 26/123; B01D 5/0003; H01S 3/0407 (86) International application number: PCT/EP2024/072821 (87) International publication number: WO 2025/040518 (27.02.2025 Gazette 2025/09)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 18.08.2023 EP 23192232 (71) Applicant: Bystronic Laser AG 3362 Niederönz (CH)	(72) Inventors: AMSTAD, Beat 3366 Bettenhausen (CH) GFELLER, Robert 3074 Muri bei Bern (CH) LÜDI, Andreas 3400 Burgdorf (CH) (74) Representative: Frei Patent Attorneys  Frei Patentanwaltsbüro AG Hagenholzstrasse 85 8050 Zürich 8050 Zürich (CH)