(19)

(11)

EP 4 048 830 A1

(12)

(43) Date of publication: 31.08.2022 Bulletin 2022/35 (21) Application number: 20800231.1 (22) Date of filing: 21.10.2020

(51) International Patent Classification (IPC):  D01D 5/08(2006.01) D01F 8/02(2006.01) D04H 1/435(2012.01) D04H 3/013(2012.01) D01F 2/28(2006.01) D04H 1/4258(2012.01) D04H 3/011(2012.01) (52) Cooperative Patent Classification (CPC): D04H 3/013; D04H 3/011; D04H 1/4258; D04H 1/435; D01F 2/28; D01D 5/082; D01F 1/10; D01F 6/92 (86) International application number: PCT/FI2020/050689 (87) International publication number: WO 2021/079025 (29.04.2021 Gazette 2021/17)

(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: 22.10.2019 FI 20195904 (71) Applicant: Woodly Oy 00520 Helsinki (FI)	(72) Inventors: ASIKAINEN, Martta 00520 Helsinki (FI) VUORINEN, Tommi 33101 Tampere (FI) (74) Representative: Papula Oy  P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)