(19)

(11)

EP 4 208 598 A1

(12)

(43) Date of publication: 12.07.2023 Bulletin 2023/28 (21) Application number: 21751595.6 (22) Date of filing: 11.08.2021

(51) International Patent Classification (IPC):  D21F 3/02(2006.01) D21F 5/18(2006.01) (52) Cooperative Patent Classification (CPC): D21F 3/0218; D21F 5/181 (86) International application number: PCT/EP2021/072391 (87) International publication number: WO 2022/048877 (10.03.2022 Gazette 2022/10)

(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: 03.09.2020 IT 202000020926 (71) Applicant: A.CELLI PAPER S.P.A. 55012 Capannori (LU) (IT)	(72) Inventors: TONELLO, Fabrizio 55012 Capannori (LU) (IT) ALBANO, Alessandro 55012 Capannori (LU) (IT) (74) Representative: Mannucci, Michele et al Ufficio Tecnico Ing. A. Mannucci S.r.l. Via della Scala, 4 50123 Firenze 50123 Firenze (IT)