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(11)

EP 3 562 623 A1

(12)

(43) Date of publication: 06.11.2019 Bulletin 2019/45 (21) Application number: 17832573.4 (22) Date of filing: 27.12.2017

(51) International Patent Classification (IPC):  B24D 3/00(2006.01) B24D 3/34(2006.01) B24D 3/28(2006.01) B24D 11/00(2006.01) (86) International application number: PCT/IB2017/058433 (87) International publication number: WO 2018/122742 (05.07.2018 Gazette 2018/27)

(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: MA MD TN (30) Priority: 30.12.2016 GB 201622439 (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)	(72) Inventors: CARTER, Christopher J. Bracknell Berkshire RG12 8HT (GB) YALE, Martin Bracknell Berkshire RG12 8HT (GB) (74) Representative: Hettstedt, Stephan  3M Deutschland GmbH 3M Office for Intellectual Property Counsel Carl-Schurz-Strasse 1 41453 Neuss 41453 Neuss (DE)