(19)

(11)

EP 3 701 101 A1

(12)

(43) Date of publication: 02.09.2020 Bulletin 2020/36 (21) Application number: 18783139.1 (22) Date of filing: 27.09.2018

(51) International Patent Classification (IPC):  E04C 5/06(2006.01) E04C 5/07(2006.01) (86) International application number: PCT/IB2018/057478 (87) International publication number: WO 2019/064211 (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: 29.09.2017 IT 201700109689 (71) Applicant: Società per Azioni Fratelli Citterio 20900 Monza (MB) (IT)	(72) Inventor: CITTERIO, Giorgio Celeste 20900 Monza (IT) (74) Representative: Cosenza, Simona et al Barzanò & Zanardo Milano S.p.A. Via Borgonuovo, 10 20121 Milano 20121 Milano (IT)