Shear mode transducer for ink jet systems
US4825227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Feb 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14225
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In the shear mode piezoelectric transducer for an ink jet system described in the specification, a piezoelectric plate is polarized parallel to the plane of the plate and in directions extending away from the center of the pressure chamber with which the transducer is used, and electrodes mounted on opposite surfaces of the plate impose electric fields orthogonal to the direction of polarization. The resulting shear motion of the transducer decreases the volume of the pressure chamber, ejecting a drop of ink from an orifice communicating with the pressure chamber. The piezeelectric plate used in the transducer is prepared by imposing electric fields within the plate in the direction parallel to the plane of the plate between electrodes mounted on opposite sides of the plate in the central region of the pressure chamber and electrodes mounted on opposite sides of the plate in the peripheral regions of the pressure chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.