Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2011-04-19
2011-04-19
Rahll, Jerry T (Department: 2874)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S071000
Reexamination Certificate
active
07926918
ABSTRACT:
A piezoelectric layer is provided on a vibration plate which covers a plurality of pressure chambers extending in a predetermined direction. The piezoelectric layer has a first area corresponding to a central portion in a width direction of each of the pressure chambers and a second area corresponding to both sides in a longitudinal direction of an inner peripheral portion of each of the pressure chambers. A head for a liquid-droplet jetting apparatus which has the piezoelectric layer is prepared, and when the head is driven, a first driving step for applying a drive voltage to the second area, and the first area corresponding to a pressure chamber which does not jet a liquid droplet is carried out. Thereafter, a second driving step for applying a drive voltage to the first area corresponding to a pressure chamber which discharges the liquid droplet is carried out.
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Brother Kogyo Kabushiki Kaisha
Frommer & Lawrence & Haug LLP
Rahll Jerry T
LandOfFree
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