(19)

(11)

EP 4 259 450 A1

(12)

(43) Date of publication: 18.10.2023 Bulletin 2023/42 (21) Application number: 21827634.3 (22) Date of filing: 08.12.2021

(51) International Patent Classification (IPC):  B42D 25/324(2014.01) B42D 25/351(2014.01) B42D 25/364(2014.01) B42D 25/378(2014.01) G02B 3/08(2006.01) B42D 25/333(2014.01) B42D 25/36(2014.01) B42D 25/373(2014.01) B42D 25/425(2014.01) (52) Cooperative Patent Classification (CPC): B42D 25/324; B42D 25/333; B42D 25/351; B42D 25/36; B42D 25/364; B42D 25/373; B42D 25/378; B42D 25/425; G02B 5/223; G02B 5/286; G02B 1/005 (86) International application number: PCT/GB2021/053209 (87) International publication number: WO 2022/123241 (16.06.2022 Gazette 2022/24)

(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: 09.12.2020 GB 202019383 (71) Applicant: De La Rue International Limited Basingstoke, Hampshire RG22 4BS (GB)	(72) Inventors: COMMANDER, Lawrence Basingstoke Hampshire RG22 4BS (GB) GODFREY, John Basingstoke Hampshire RG22 4BS (GB) WHITEMAN, Robert Basingstoke Hampshire RG22 4BS (GB) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)