SG11201909774PA - Security devices and methods for their manufacture - Google Patents

Abstract

Figf) 10 W O 20 18/ 206936 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 15 November 2018 (15.11.2018) WIPO I PCT ill IIIIIIII VIII omitiloilailoolioliflo oimIE (10) International Publication Number WO 2018/206936 Al 10 Fig. 2(d) (51) International Patent Classification: B42D 25/387 (2014.01) B411113/14 (2006.01) (21) International Application Number: PCT/GB2018/051233 (22) International Filing Date: 09 May 2018 (09.05.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 1707464.2 10 May 2017 (10.05.2017) GB (71) Applicant: DE LA RUE INTERNATIONAL LIMIT- ED [GB/GB]; De La Rue House, Jays Close, Viables, Bas- ingstoke Hampshire RG22 4BS (GB). (72) Inventor: MUNDY, Darryl; 12, Golden Miller Lane, Pole- gate, East Sussex BN26 5HW (GB). (74) Agent: GILL JENNINGS & EVERY LLP; The Broadgate Tower, 20 Primrose Street, London EC2A 2ES (GB). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (54) Title: SECURITY DEVICES AND METHODS FOR THEIR MANUFACTURE (57) : A security device is disclosed, comprising: a first ink (21) and a second ink (22) each arranged in respective laterally offset first and second regions of the security device, the first and second inks each comprising a re- 21 spective luminescent material which both luminesce in response to irradiation at at least one excitation wavelength in the ultra-violet spectrum, the first and second inks each exhibiting substantially the same non-luminescent visible colour as one another when illuminated with visible light in the absence of the at least one excitation wavelength, and the first and second inks each exhibit- ing visible colours which are different from the non-luminescent visible colour and from one another when illuminated with a combination of visible light and the at least one excitation wavelength; a third ink (23) arranged in a third region of the device laterally offset from the first and second regions of the device, the third ink not luminescing in response to the at least one excitation wavelength, and the third ink exhibiting substantially the same non-lumines- cent visible colour as the first and second inks when illuminated with visible 14 light in the absence of the at least one excitation wavelength; and a fourth ink 13 (24) arranged in a masking pattern which partially overlaps one or more por- tions of the first ink in the first region and/or of the second ink in the second region, the fourth ink not luminescing in response to the at least one excitation wavelength, and the fourth ink exhibiting a different visible colour from the 2 non-luminescent visible colour of the first, second and third inks when illumi- nated with visible light in the absence of the at least one excitation wavelength. When the security device is illuminated with visible light in the absence of the at least one excitation wavelength, the first, second and third regions together appear as one continuous pattern in the non-luminescent visible colour, the fourth ink obscuring the presence of more than one ink forming the continuous pattern, and when the security device is illuminated with a combination [Continued on next page] WO 2018/206936 Al MIDEDIMOMOIDEIRDERIHIMIMEDIMMEOMEHOIS (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) of visible light and the at least one excitation wavelength, the first and second regions become visibly distinct from each other and from the remainder of the continuous pattern.