(19)

(11)

EP 4 396 845 A1

(12)

(43) Date of publication: 10.07.2024 Bulletin 2024/28 (21) Application number: 22863706.2 (22) Date of filing: 31.08.2022

(51) International Patent Classification (IPC):  G21F 9/04(2006.01) C02F 1/66(2023.01) C02F 1/52(2023.01) A62D 3/30(2007.01) (52) Cooperative Patent Classification (CPC): G21F 9/10; G21F 9/12; Y02E 30/10 (86) International application number: PCT/FI2022/050568 (87) International publication number: WO 2023/031518 (09.03.2023 Gazette 2023/10)

(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: 31.08.2021 EP 21194069 (71) Applicant: EPSE Oy 33470 Ylöjärvi (FI)	(72) Inventor: RISSANEN, Vesa 33800 Lempäälä (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)