FIELD: safety.
SUBSTANCE: invention relates to protective thread intended for embedding into protected document. Thread has at least two zones located on each side of separation line, passing in longitudinal direction along thread, first optically variable protective element in first zone and second optically variable protective element in second zone. First and second elements are distant from separation line. For first observation direction two elements have appearance different to each other. For second observation direction said two elements, first, have appearance, changed compared to their appearance when viewed in first observation direction, and, second, have appearance different to each other.
EFFECT: enabling easier thread making process.
33 cl, 31 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SECURITY ELEMENT COMPRISING VOLUME HOLOGRAM | 2014 |
|
RU2665434C2 |
| PROTECTED DOCUMENT | 2019 |
|
RU2775784C2 |
| SEE-THROUGH PROTECTIVE ELEMENT HAVING MICROSTRUCTURES | 2007 |
|
RU2452627C2 |
| IMPROVEMENT OF SUBSTRATES THAT INCLUDE PROTECTIVE DEVICES | 2005 |
|
RU2360060C2 |
| SECURITY ELEMENT | 2014 |
|
RU2664945C1 |
| PROTECTED ARTICLE COMPRISING DETECTING RASTER AND COMBINED IMAGE | 2016 |
|
RU2731962C2 |
| SECURITY ELEMENT | 2008 |
|
RU2466030C2 |
| PROTECTED STRUCTURE CONTAINING PHOSPHORESCENT AND FLUORESCENT COMPOSITIONS | 2011 |
|
RU2578316C2 |
| SECURITY ELEMENT AND SECURITY DOCUMENT | 2016 |
|
RU2700012C1 |
| PROTECTIVE ELEMENT AND METHOD OF ITS PRODUCTION | 2006 |
|
RU2395400C2 |
