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(11)

EP 4 816 124 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 25702312.7 (22) Date of filing: 17.01.2025

(51) International Patent Classification (IPC):  B24D 11/00(2006.01) B24D 18/00(2006.01) (52) Cooperative Patent Classification (CPC): B24B 49/02; B24D 11/00; B24D 18/00; B24B 49/10; G05B 19/41875; G05B 2219/32187; G05B 2219/32188; G05B 2219/32194 (86) International application number: PCT/FI2025/050023 (87) International publication number: WO 2025/163241 (07.08.2025 Gazette 2025/32)

(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: 30.01.2024 FI 20245083 (71) Applicant: Mirka Ltd 66850 Jepua (FI)	(72) Inventors: SJÖBERG, Tomas 66850 Jeppo (FI) SUNDELL, Mats 66970 Hirvlax (FI) (74) Representative: Berggren Oy  P.O. Box 16 Fabianinkatu 21 00101 Helsinki 00101 Helsinki (FI)