(19)

(11)

EP 3 953 511 A1

(12)

(43) Date of publication: 16.02.2022 Bulletin 2022/07 (21) Application number: 20717982.1 (22) Date of filing: 19.03.2020

(51) International Patent Classification (IPC):  D04B 1/02(2006.01) (52) Cooperative Patent Classification (CPC): D04B 1/025; D10B 2501/02; D10B 2401/04 (86) International application number: PCT/IT2020/050066 (87) International publication number: WO 2020/208662 (15.10.2020 Gazette 2020/42)

(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: 12.04.2019 IT 201900005680 (71) Applicant: Cafissi S.p.A. 59100 Prato (PO) (IT)	(72) Inventor: CAFISSI, Fabrizio 59015 Carmignano (PO) (IT) (74) Representative: Fanfani, Stefano  Fanfani S.R.L. Via Giovanni Bovio 19 50136 Firenze 50136 Firenze (IT)