Method and apparatus for ink-jet printing
US6062674A · kind A · utility
44Cited by
13References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1996 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Jan 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/0017
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
When a black image region is printed, the overall pixels in the region is printed by a black ink. Then, a cation type cyan ink which makes a coloring agent in the ink insoluble is printed on the pixels of a predetermined pattern. By this, the dye of the black ink is maintained near the surface of the printing medium to increase density of the black image. At the same time, for preventing variation of tone of the black image, the pixels of the predetermined pattern are printed by a yellow ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.