Instant ticket redundancy via multi-chromatic indicia
US10377162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2019 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/043
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A redundantly printed security-enhanced document, printing method and system ensure the meaning of the information imparted by variable indicia printed by redundant printing on the document with removable scratch-off coatings. By printing the variable indicia with multiple colors, redundancy and integrity of the intended indicia is achieved. Additionally, inverted color indicia countermeasures to pinprick attacks are also disclosed. The redundantly printed document, methods and systems enhance the overall appearance of the redundantly printed document, and reduce possible consequences resulting from misprinted variable indicia. The resultant printed process color indicia maintains a grayscale equivalent level of a process color greater than or equal to the measured grayscale equivalent level of the substrate surface plus an additional contrast delta of 15%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.