Multi-Luminescent Security Element and Value or Security Product Containing Said Security Element

• US 20160053169A1
• Filed: 04/02/2014
• Published: 02/25/2016
• Est. Priority Date: 04/08/2013
• Status: Active Grant

• Current Assignee: Bundesdruckerei GmbH (Government of Germany)
• Original Assignee: Bundesdruckerei GmbH (Government of Germany)
• Inventors: KUNATH, Christian, KRGER, Per, MOMBRE, Alexander, VON CZAPIEWSKI, Christoph
• Granted Patent: US 11,214,734 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B42D 25/23 Identity cards
• CPC Class Codes: B42D 25/309 Photographs
• CPC Class Codes: B42D 25/355 Security threads
• CPC Class Codes: B42D 25/36 comprising special materials
• CPC Class Codes: B42D 25/387 absorbing or reflecting ultraviolet light
• CPC Class Codes: C09J 2203/338 as tamper-evident tape or label
• CPC Class Codes: C09J 7/20 characterised by their carriers
• CPC Class Codes: C09K 11/595 with zinc or cadmium
• CPC Class Codes: D01D 5/30 Conjugate filaments; Spinnerette packs therefor
• CPC Class Codes: D01F 1/04 Pigments
• CPC Class Codes: D21H 15/10 Composite fibres
• CPC Class Codes: D21H 21/30 Luminescent or fluorescent substances, e.g. for optical bleaching D21H21/40 takes precedence
• CPC Class Codes: D21H 21/40 Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00
• CPC Class Codes: D21H 21/42 Ribbons or strips filaments D21H15/06
• CPC Class Codes: D21H 21/44 Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
• CPC Class Codes: D21H 21/46 Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
• CPC Class Codes: D21H 21/48 Elements suited for physical verification, e.g. by irradiation

Abstract

In order to increase the security of value or security documents 100, a multi-luminescent security element 400 is provided which contains at least one first luminescence means 510 and at least one second luminescence means 520. The first luminescence means 510 can be excited under first excitation conditions Sp-1 for the purpose of luminescence, and the second luminescence means 520 can be excited under second excitation conditions Sp-2 for the purpose of luminescence, said second excitation conditions Sp-2 differing from the first excitation conditions Sp-1. The multi-luminescent security element 400 is additionally equipped with at least one absorber means 600 which prevents an excitation of the at least one first luminescence means 510 under the second excitation conditions Sp-2 for the purpose of luminescence.

Claims

1. Multi-luminescent security element (400), containing at least one first luminescence means (510), which can be excited to luminescence under first excitation conditions (Sp-1), and at least one second luminescence means (520), which can be excited to luminescence under second excitation conditions (Sp-2), which differ from the first excitation conditions (Sp-1), characterized in that, in the multi-luminescent security element (400), in addition, at least one absorber means (600) is contained, which prevents an excitation to luminescence of the at least one first luminescence means (510) under the second excitation conditions (Sp-2), but not under the first excitation conditions (Sp-1).

2. Multi-luminescent security element (400) according to claim 1, characterized in that the security element (400) comprises at least two element areas (430, 440) spatially separate from one another, wherein, in a first element area (430), the at least one first luminescence means (510) is contained, and wherein, in a second element area (440), the at least one second luminescence means (520) is contained.

3. Multi-luminescent security element (400) according to any one of the preceding claims, characterized in that the first element area (430), in addition, contains the at least one absorber means (600) or is surrounded by a shielding area (490) containing the at least one absorber means (600).

4. Multi-luminescent security element (400) according to any one of the preceding claims, characterized in that the security element (400) is formed at least partially by an adhesive (450).

5. Multi-luminescent security element (400) according to any one of the preceding claims, characterized in that the security element (400) is formed by at least one filament (410, 420) which comprises at least two element areas (430, 440) separate from one another in the longitudinal direction of the filament and/or at least two element areas (430, 440) arranged concentric to one another.

6. Multi-luminescent security element (400) according to claim 5, characterized in that the security element (400) is formed by at least two filaments (410, 420) connected to one another or by at least one filament (410) and an adhesive area (420), and in that at least some of the at least two filaments (410, 420) and/or the adhesive area (420) in each case form an element area (430, 440).

7. Multi-luminescent security element (400) according to any one of the preceding claims, characterized in that the first excitation conditions (Sp-1) includes the irradiation of electromagnetic radiation in the UV-A range and in that the second excitation conditions (Sp-2) includes the irradiation of electromagnetic radiation in the UV-B and/or UV-C range.

8. Value or security product (100) containing at least one multi-luminescent security element (400) according to any one of claims 1 to 7.