| 摘要 |
FIELD: printing industry. ^ SUBSTANCE: material represents a paper web, which contains a plunge-type thread for counterfeit protection. In areas of its emerging there are bulges arranged as a result of thread location over sheet surface, availability of which visually and by the feel helps user to identify quality of bank notes. Protective threads of textile production have been used. Bulges are arranged as a result of thread thickening in areas of its emerging from paper web. Thickened parts of thread are provided with taps in the form of branches or thinner areas for their more reliable adhesion to paper web. Threads are shaped into grid. Thread is embedded into web by fragments, for instance following nominal value of bank notes. Threads are visible symmetrically on both sides of bank note sheet. ^ EFFECT: improved extent of bank notes protection and easier detection of their authenticity both visually and by the feel, especially for visually impaired people. ^ 6 cl, 4 dwg |
