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(11)

EP 3 956 510 A1

(12)

(43) Date of publication: 23.02.2022 Bulletin 2022/08 (21) Application number: 20725903.7 (22) Date of filing: 10.04.2020

(51) International Patent Classification (IPC):  D04B 9/38(2006.01) D04B 15/68(2006.01) D04B 1/02(2006.01) D04B 15/34(2006.01) D04B 1/10(2006.01) D04B 15/78(2006.01) (52) Cooperative Patent Classification (CPC): D04B 15/34; D04B 9/38; D04B 1/02; D04B 1/104; D04B 15/78; D04B 15/68 (86) International application number: PCT/IB2020/053442 (87) International publication number: WO 2020/212817 (22.10.2020 Gazette 2020/43)

(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: 16.04.2019 IT 201900005896 (71) Applicant: SANTONI S.p.A. 25135 Brescia (IT)	(72) Inventors: LODRINI, Maurizio 25134 Brescia (IT) ALGHISI, Mauro 25030 Torbole Casaglia (BS) (IT) (74) Representative: PGA S.p.A.  Piazza della Vittoria, 7 25121 Brescia 25121 Brescia (IT)