Embossing of bank notes or the like with security devices
US6176522A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Apr 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/916
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A security document or token such as a banknote is provided which has a transparent portion of plastics material which includes a security device. The region surrounding the transparent portion and preferably all the remaining part of the banknote is printed with indicia. The security device includes regions of embossed lines extending at different angles to each other defining different shapes that are visible to a greater or lesser extent upon transmission and reflection of light as the note is tilted, rotated or viewed from different angles relative to the light source. The embossed lines in some of the regions are finer than coarser and deeper and more widely spaced lines in the other regions. The coarser, deeper lines are of such a thickness and width as to be detectable by touch in addition to being visible by the naked eye. There is also provided a method of and apparatus for producing a banknote with a security device in accordance with the invention in which the transparent portion of the note is embossed during an intaglio printing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.