Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2005-03-08
2005-03-08
Brooke, Michael S. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
06863383
ABSTRACT:
A piezoelectric transducer is provided with a first set of electrodes spaced in a thickness direction of the piezoelectric ceramic layers, and a second set of electrodes spaced in a direction along a plane of the piezoelectric ceramic layers. The first set of electrodes defines therebetween a first area, and the second set of electrodes defines therebetween second areas one on each side of the first area. The first area is substantially level with the second areas. The first and second areas are polarized in the thickness direction of the piezoelectric ceramic layers. Upon application of a drive voltage to the first and second sets of electrodes, an electric field is generated in each of the second areas perpendicular to the polarization direction and each of the second areas is obliquely deformed by a piezoelectric shear effect, and an electric field is generated in the first area parallel to the polarization direction and the first area is deformed by a piezoelectric longitudinal effect to increase the thickness of the piezoelectric ceramic layers.
REFERENCES:
patent: 5266964 (1993-11-01), Takahashi et al.
patent: 6174051 (2001-01-01), Sakaida
Brooke Michael S.
Brother Kogyo Kabushiki Kaisha
Reed Smith LLP
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