Security document including a transparent window formed in the substrate thereof
US12269286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2023 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Apr 6, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/148
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A security document includes a substrate having a transparent window formed in the substrate. A micro-optical structure including microlenses is arranged on one side of the substrate. A first print image is arranged on the other side of the substrate, opposite the micro-optical structure, and includes image elements having a dot size or line thickness smaller than a lens width of the microlenses. A layer is arranged on part of the first print image on the side facing away from the micro-optical structure. A second print image is arranged on the layer, facing away from the micro-optical structure, and so that the second print image can be brought into alignment with the micro-optical structure after folding the substrate at a bending line so that the second print image, or at least a piece of information contained therein, becomes visible and/or recognizable when viewed from a direction of the micro-optical structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.