EP 2073986 A1 20090701 - IMPROVEMENTS IN SECURITY DEVICES
Title (en)
IMPROVEMENTS IN SECURITY DEVICES
Title (de)
VERBESSERTE SICHERHEITSVORRICHTUNGEN
Title (fr)
AMÉLIORATIONS APPORTÉES À DES DISPOSITIFS DE SÉCURITÉ
Publication
Application
Priority
- GB 2007003752 W 20071003
- GB 0620065 A 20061010
Abstract (en)
[origin: GB2442711A] The invention provides security devices that can be used in varying shapes and sizes for various authenticating or security applications. The security device comprises a first layer or film of an optically variable liquid crystal material 12, a second layer or film of an optically variable liquid crystal material 13 which exhibits different reflective characteristics to the first layer, and a partial layer of a light absorbing translucent material 14 between the first and second liquid crystal layers. This may form indicia such as symbols, patterns or alphanumeric characters and may be multi-coloured. Light reflected at certain angles may be in the infrared or ultraviolet regions of the electromagnetic spectrum. The device is secured to a document by adhesive layer 19. Partially demetallised polymeric film 17 carries indicia 26.
IPC 8 full level
B42D 15/00 (2006.01)
CPC (source: EP GB US)
B42D 25/24 (2014.10 - US); B42D 25/29 (2014.10 - EP GB US); B42D 25/364 (2014.10 - US); B42D 25/355 (2014.10 - EP); B42D 2033/26 (2022.01 - EP GB); B42D 2035/24 (2022.01 - EP); B42D 2035/36 (2022.01 - EP)
Citation (search report)
See references of WO 2008043981A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
GB 0620065 D0 20061122; GB 2442711 A 20080416; GB 2442711 B 20110413; EP 2073986 A1 20090701; EP 2073986 B1 20120829; ES 2390704 T3 20121115; PL 2073986 T3 20130131; SI 2073986 T1 20121231; WO 2008043981 A1 20080417
DOCDB simple family (application)
GB 0620065 A 20061010; EP 07824008 A 20071003; ES 07824008 T 20071003; GB 2007003752 W 20071003; PL 07824008 T 20071003; SI 200731081 T 20071003