Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-01-31
2011-10-18
Mruk, Geoffrey (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S068000
Reexamination Certificate
active
08038265
ABSTRACT:
An ink-jet head includes a piezoelectric layer, pressure chambers, nozzles, first electrodes, and second electrodes. When electric potentials of the first and second electrodes respectively are changed at the same timing such that increase and decrease in the electric potentials are opposite between the first and second electrodes, volume of the pressure chamber is changed to apply jetting-pressure to ink in the pressure chamber, thereby jetting an ink droplet from the nozzle. When only the electric potential of the second electrode is changed, the volume of the pressure chamber is changed to apply a vibrating-pressure lower than the jetting-pressure to the ink in the pressure chamber, thereby vibrating meniscus of the ink, agitating the ink in the nozzle. This makes it possible to suppress increase in viscosity of the ink in the nozzle.
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patent: 2005/0270340 (2005-12-01), Mita
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Brother Kogyo Kabushiki Kaisha
Frommer & Lawrence & Haug LLP
Mruk Geoffrey
LandOfFree
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