Bubble-jet type ink-jet printhead capable of preventing a backflow of ink
US6499832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/1437
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bubble-jet type inkjet printhead, a manufacturing method thereof and a method of ejecting ink, wherein, in the printhead, a manifold supplying ink, a hemispherical ink chamber, and an ink channel for connecting the manifold with the ink chamber are integrally formed on the substrate. A nozzle plate on the substrate having a nozzle, and a heater formed in an annular shape and centered around the nozzle are integrated without a complex process such as bonding. Thus, this simplifies the manufacturing process and facilitates high volume production. Furthermore, according to the ink ejection method, a doughnut-shaped bubble is formed to eject ink, thereby preventing a back flow of ink as well as formation of satellite droplets that may degrade image resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.