(19)

(11)

EP 3 737 792 A1

(12)

(43) Date of publication: 18.11.2020 Bulletin 2020/47 (21) Application number: 19703189.1 (22) Date of filing: 10.01.2019

(51) International Patent Classification (IPC):  D21F 3/10(2006.01) D21F 11/14(2006.01) D21F 5/18(2006.01) D21F 5/00(2006.01) (86) International application number: PCT/IB2019/050183 (87) International publication number: WO 2019/138349 (18.07.2019 Gazette 2019/29)

(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: 11.01.2018 IT 201800000720 30.05.2018 IT 201800005880 30.05.2018 IT 201800005881 (71) Applicant: A.CELLI PAPER S.P.A. 55012 Capannori (LU) (IT)	(72) Inventors: FILIPPI, Andrea 55100 Mammoli (LU) (IT) DI VITA, Denny 55016 Porcari (IT) (74) Representative: Mannucci, Michele et al Ufficio Tecnico Ing. A. Mannucci S.r.l. Via della Scala, 4 50123 Firenze 50123 Firenze (IT)