(19)

(11)

EP 3 801 915 A1

(12)

(43) Date of publication: 14.04.2021 Bulletin 2021/15 (21) Application number: 19807770.3 (22) Date of filing: 20.05.2019

(51) International Patent Classification (IPC):  B03C 3/12(2006.01) B03C 3/41(2006.01) B03C 3/38(2006.01) B03C 3/47(2006.01) (86) International application number: PCT/FI2019/050390 (87) International publication number: WO 2019/224427 (28.11.2019 Gazette 2019/48)

(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: 24.05.2018 FI 20185477 (71) Applicant: Alme Solutions OY 33100 Tampere (FI)	(72) Inventor: HEINOVAARA, Jari 37180 SARKOLA (FI) (74) Representative: Berggren Oy, Tampere  Visiokatu 1 33720 Tampere 33720 Tampere (FI)