Security printing and detecting systems and methods
US8157293B2 · kind B2 · utility
8Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2007 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Aug 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/901
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method of security printing can comprise the steps of printing a transparent ink onto a portion of a coated substrate resulting in printed region and an unprinted region, where the transparent ink is devoid of dyes, pigments, ceramics, metallics, and fluorescents; illuminating both the printed region and the unprinted region of the substrate, where the printed region scatters more light than the unprinted region creating a contrast; and detecting the contrast with a sensor that is sensitive to detecting light scattering differences between the printed region and the unprinted region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.