Liquid ejection head and method of manufacturing the liquid ejection head
US6752489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2001 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Oct 12, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/164
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a liquid ejection head comprising a plurality of opened liquid flow passages arranged side by side and communicating with ejection orifices through which a liquid is ejected, and thermal energy generating elements for generating thermal energy utilized to eject the liquid through the ejection orifices and generating bubbles in the liquid, at least one closed liquid flow passage closed at one end corresponding to the ejection orifice is provided in at least one end side of the plurality of opened liquid flow passages communicating with the ejection orifices. Since the closed liquid flow passage is not communicated with open air, the liquid is relatively hard to flow into the closed liquid flow passage. Accordingly, a bubble having the function of absorbing a liquid vibration caused upon ejection of the liquid is formed to extend from the interior of the closed liquid flow passage rearward. Vibrations of liquid meniscuses at the ejection orifices can be suppressed with the presence of the bubble. A method of manufacturing the liquid ejection head with ease is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.