Liquid ejection head and method of manufacturing the same
US8950850B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Jun 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid ejection head has a plurality of pressure chambers each communicating with an ejection port at one end and with an ink supply port at the other end. Each of the pressure chambers has lateral walls formed by piezoelectric elements and configured so as to eject ink from the corresponding ejection port as a result of a capacity change of the pressure chamber due to an expansion or contraction of the piezoelectric elements. The liquid ejection head is constituted by a plate-shaped piezoelectric portion and a plurality of column-shaped piezoelectric portions arranged thereon. The plate-shaped piezoelectric portion has a plurality of holes and a plurality of through holes located around the holes. Each of the column-shaped piezoelectric portions has a hollow section. Each hole of the plate-shaped piezoelectric portion and the hollow section of the corresponding column-shaped piezoelectric portion form a pressure chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.