Jet ink composition for printing watermarks
US6645280B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2000 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | May 26, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/36
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a jet ink composition suitable for printing watermarks on paper substrates. The jet ink composition comprises a solvent and a translucentizing agent. An example of a translucentizing agent is sucrose acetate isobutyrate. The present invention further provides a method of ink jet printing watermark on an object comprising projecting a stream of droplets of the ink composition and controlling the direction of the stream so that the droplets form the watermark on the object. The method of the present invention has the advantage that it provides high speed watermarking capability. The method provides a further advantage that it is economical in changing the design of watermarks. The method is versatile and allows changes in the design of watermarks to be incorporated readily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.