Laser imaging
US8278243B2 · kind B2 · utility
6Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2005 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Apr 4, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/283
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink formulation comprises a marking component and a metal salt that absorbs laser irradiation at 700-2000 mn and thereby causes the marking component to change colour. A copper salt in particular allows effective marking with a diode or CO2 laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.