Foil composite card
US10332846B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 2016 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Aug 29, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Composite cards formed in accordance with the invention include a security layer comprising a hologram or diffraction grating formed at or in the center, or core layer of the card. The hologram may be formed by embossing a designated area of the core layer with a diffraction pattern and depositing a thin layer of metal on the embossed layer. Additional layers may be selectively and symmetrically attached to the top and bottom surfaces of the core layer. A laser may be used to remove selected portions of the metal formed on the embossed layer, at selected stages of forming the card, to impart a selected pattern or information to the holographic region. The cards may be “lasered’ when the cards being processed are attached to, and part of, a large sheet of material, or after the sheets are die-cut into cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.