(19)

(11)

EP 4 558 852 A1

(12)

(43) Date of publication: 28.05.2025 Bulletin 2025/22 (21) Application number: 23742012.0 (22) Date of filing: 12.07.2023

(51) International Patent Classification (IPC):  G02B 6/38(2006.01) (52) Cooperative Patent Classification (CPC): G02B 6/3821; G02B 6/387; G02B 6/3887; G02B 6/3885; G02B 6/3823 (86) International application number: PCT/EP2023/069255 (87) International publication number: WO 2024/017720 (25.01.2024 Gazette 2024/04)

(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: KH MA MD TN (30) Priority: 22.07.2022 CH 8882022 (71) Applicant: Huber+Suhner AG 9100 Herisau (CH)	(72) Inventors: VÖLKER, Lothar Michael 9468 Sax (CH) WATRINET, Hanns 8733 Eschenbach (CH) (74) Representative: Rentsch Partner AG  Kirchenweg 8 Postfach 8034 Zürich 8034 Zürich (CH)