(19)

(11)

EP 4 061 579 A1

(12)

(43) Date of publication: 28.09.2022 Bulletin 2022/39 (21) Application number: 20820535.1 (22) Date of filing: 17.11.2020

(51) International Patent Classification (IPC):  B24B 41/00(2006.01) B24B 49/10(2006.01) B24D 13/04(2006.01) B24D 9/00(2006.01) B24B 27/00(2006.01) B24B 41/04(2006.01) B24D 13/16(2006.01) B24B 29/00(2006.01) (52) Cooperative Patent Classification (CPC): B24D 13/04; B24D 13/16; B24D 9/003; B24B 27/0084; B24B 29/00; B24B 41/002; B24B 41/042; B24B 49/10; B24B 27/0038 (86) International application number: PCT/IB2020/060802 (87) International publication number: WO 2021/099928 (27.05.2021 Gazette 2021/21)

(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: 18.11.2019 IT 201900021477 (71) Applicant: Sir S.p.A. 41122 Modena (IT)	(72) Inventor: PASSONI, Luciano 41122 Modena (MO) (IT) (74) Representative: Brunacci, Marco  BRUNACCI & PARTNERS S.r.l. Via Pietro Giardini, 625 41125 Modena (MO) 41125 Modena (MO) (IT)