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(11)

EP 4 314 407 A1

(12)

(43) Date of publication: 07.02.2024 Bulletin 2024/06 (21) Application number: 22715372.3 (22) Date of filing: 10.03.2022

(51) International Patent Classification (IPC):  D21H 11/14(2006.01) D21H 11/18(2006.01) D21H 19/38(2006.01) D21H 23/46(2006.01) D21H 27/10(2006.01) D21H 21/52(2006.01) B32B 29/00(2006.01) D21H 19/34(2006.01) D21H 23/28(2006.01) D21H 23/48(2006.01) D21H 27/38(2006.01) (52) Cooperative Patent Classification (CPC): D21H 19/34; D21H 19/385; D21H 11/18; D21H 23/28; D21H 23/46; D21H 23/48; D21H 27/10; D21H 27/38; D21H 11/14; D21H 21/52 (86) International application number: PCT/IB2022/000111 (87) International publication number: WO 2022/208159 (06.10.2022 Gazette 2022/40)

(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: 02.04.2021 US 202117221422 (71) Applicant: FiberLean Technologies Limited Par, Cornwall PL24 2SQ (GB)	(72) Inventors: SVENDING, Per 442 31 Kungalv (SE) PHIPPS, Jonathan Cornwall PL26 6JE (GB) REEVE-LARSON, Thomas Cornwall PL26 7JF (GB) SELINA, Soultana Cornwall PL25 4ST (GB) SKUSE, David Truro, Cornwall TR1 1BH (GB) (74) Representative: Shelton, Ruth Emily et al Venner Shipley LLP Byron House Cambridge Business Park Cowley Road Cambridge CB4 0WZ Cambridge CB4 0WZ (GB)