Piezoelectric printing device with outer surface electrode layer
US11198295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2020 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Jun 26, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14491
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric printing device includes a substrate and a piezoelectric plate. A pair of staggered rows of drop ejectors is disposed along a row direction on the substrate. Each drop ejector includes a nozzle in fluid communication with a pressure chamber that is bounded by side walls. The piezoelectric plate has a first surface that is proximate to the pressure chambers. An electrode layer is disposed on an opposing outer second surface of the piezoelectric plate. The electrode layer includes a signal line corresponding to each drop ejector in the pair of staggered rows, and at least one common ground bus connected to ground traces that are aligned over the side walls of each pressure chamber. Each signal line leads to a corresponding signal input pad that is disposed between the staggered rows. The common ground bus extends along the row direction and leads to a ground return pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.