Printing system for application of different ink types to create a security document
US6543889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J3/543
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A security document includes a secure message which is obscured by a frangible layer of opaque material. The frangible layer of opaque material may be removed using light abrasion. The security document is printed on an especially prepared print media, which may include a substrate of paper, light card stock, or plastic film, for example. The printing method may be carried out using a common inkjet printer, or a printer of another type may be used to print such a security document. Methods of performing the printing operation are explained, and especially configured printing apparatus for practicing the method is also disclosed. A covert printed security document, and method of making such a document is presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.