Inkjet printer
US7780272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Oct 17, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14306
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The lnkjet printer has a pressure chamber, a plezoelectric actuator, and a controller. The plezoelectrlc actuator has a piezoelectric film, a first electrode, a second electrode, and a third electrode. The first electrode, positioned in the region facing the pressure chamber, and the third electrode, positioned adjacent to the first electrode, are attached on one surface of the piezoeiectric film. The second electrode is attached on an opposite surface of the piezoelectric film and overlaps the first and third electrodes. To discharge ink, the controller applies an ink discharge signal between the first and second electrodes comprising an advanced voltage change from a predetermined voltage to the lower voltage and a subsequent voltage change from the lower voltage to the predetermined voltage. The controller also applies a peripheral signal between the second and thIrd electrodes to prevent changes in characteristics of the piezoelectrlc actuator that may affect ink discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.