Shadow image security feature
US10112434B2 · kind B2 · utility
4Cited by
30References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2008 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Oct 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/50
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security document created by laminating a metalized foil between transparent layers, and modifying the outside of the foil to form a base color of the document, while leaving a window area formed by an unmodified portion of the foil. A laser is then used to ablate at least a portion of the unmodified portion of the foil in the window area to create an image. The window area includes the laser ablated image formed therein. The resulting image is transparent, with the image being visible from a front of the security document and visible from a rear of the security document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.