(19)

(11)

EP 4 028 266 A1

(12)

(43) Date of publication: 20.07.2022 Bulletin 2022/29 (21) Application number: 20772376.8 (22) Date of filing: 09.09.2020

(51) International Patent Classification (IPC):  B42D 25/355(2014.01) B42D 25/40(2014.01) B41M 3/14(2006.01) G07D 7/12(2016.01) B42D 25/387(2014.01) B42D 25/29(2014.01) D21H 21/48(2006.01) G07D 7/20(2016.01) (52) Cooperative Patent Classification (CPC): B42D 25/355; B42D 25/387; B42D 25/40; D21H 21/48; G07D 7/12; B42D 25/29; B41M 3/144; G07D 7/2033 (86) International application number: PCT/GB2020/052161 (87) International publication number: WO 2021/048539 (18.03.2021 Gazette 2021/11)

(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: 09.09.2019 GB 201912953 (71) Applicant: Security Fibres UK Limited London EC4R 1AG (GB)	(72) Inventor: SPINKS, Gary Donald London EC4R 1AG (GB) (74) Representative: Abel & Imray LLP  Westpoint Building James Street West Bath BA1 2DA Bath BA1 2DA (GB)