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(11)

EP 4 532 825 A1

(12)

(43) Date of publication: 09.04.2025 Bulletin 2025/15 (21) Application number: 23734076.5 (22) Date of filing: 29.05.2023

(51) International Patent Classification (IPC):  D21F 5/02(2006.01) D21F 5/18(2006.01) (52) Cooperative Patent Classification (CPC): D21F 5/024; D21F 5/181 (86) International application number: PCT/IT2023/050137 (87) International publication number: WO 2023/233440 (07.12.2023 Gazette 2023/49)

(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: KH MA MD TN (30) Priority: 03.06.2022 IT 202200011744 (71) Applicant: Toscotec S.p.A. 55012 Capannori (LU) (IT)	(72) Inventors: GHELLI, Luca 10122 Torino (IT) SIMONCINI, Francesco 55100 Lucca (IT) PASSANISI, Gaetano 55100 Lucca (IT) BIBBIANI, Jacopo 56124 Pisa (IT) VOLPI, Marco 56100 Pisa (IT) MASIA, Giulia 56012 Fornacette (PI) (IT) (74) Representative: Mincone, Antimo  Viale Europa 101 50126 Firenze 50126 Firenze (IT)