Ink ejecting method and ink-jet printhead utilizing the method
US7264337B2 · kind B2 · utility
9Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Dec 7, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of ejecting ink from a ink-jet printhead includes filling a rear end of a nozzle with ink using a capillary force, the rear end of the nozzle being surrounded by a hydrophilic layer, forming an electric field directed toward an outlet of the nozzle on a front end of the nozzle, the front end of the nozzle being surrounded by a hydrophobic layer, varying a surface tension of ink to separate ink droplets having a predetermined volume from ink and to move the separated ink droplets within the front end of the nozzle toward the outlet of the nozzle, and ejecting the separated ink droplets through the outlet of the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.