Method of printing a security verification with inkjet printers
US6607267B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2001 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Sep 26, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/144
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In combination with an inkjet printer having a glossy topcoat deposition feature, a method for printing security marks on an inkjet-printed sheet which includes the step of modulating the deposition of the topcoat layer, rather applying it uniformly to the imaged surface of the sheet. Modulated deposition results in variations in gloss which are visible when the document is viewed at an angle. Three alternatives for modulation are possible: the topcoat layer may be applied to the entire sheet, but with the amount thereof deposited per unit area over the surface of the document alternating between a low value and a high value; the topcoat layer may be applied to the entire sheet, but with the amount thereof deposited per unit area varying over the surface of the document as a continuous function between a low value and a high value; or the topcoat layer may be applied to only portions of the document surface. Modulated application of the topcoat can be controlled using one of several available techniques; the standard print driver can be employed in a manner similar to that used for the printing of standard images with pigmented inks; the printer may be designed to accept a custom p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.