(19)

(11)

EP 3 688 217 A1

(12)

(43) Date of publication: 05.08.2020 Bulletin 2020/32 (21) Application number: 18786868.2 (22) Date of filing: 24.09.2018

(51) International Patent Classification (IPC):  D06C 21/00(2006.01) (86) International application number: PCT/IB2018/057355 (87) International publication number: WO 2019/064159 (04.04.2019 Gazette 2019/14)

(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: 28.09.2017 IT 201700108694 (71) Applicant: FERRARO S.p.A. 21015 Lonate Pozzolo (VA) (IT)	(72) Inventor: ZUCCHI, Alessandro 24023 Clusone (BG) (IT) (74) Representative: Barbaro, Gaetano et al Società Italiana Brevetti S.p.A. Via G. Carducci, 8 20123 Milano 20123 Milano (IT)