Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2011-03-29
2011-03-29
Feggins, K. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
07914130
ABSTRACT:
A droplet ejection device includes: a substrate having first, second, third & fourth pressure chambers extending in a first direction; a nozzle plate below the substrate & having first, second, third & fourth nozzle apertures continuous with first, second, third & forth pressure chambers, respectively; a vibration plate above the substrate; first, second, third & fourth piezoelectric elements above the vibration plate & above first, second, third & fourth pressure chambers. wherein, viewed in a second direction orthogonal to the first direction, the first nozzle aperture positioned to overlap the third nozzle aperture & doesn't overlap the second & fourth nozzle apertures; the second nozzle aperture overlaps the fourth nozzle aperture & doesn't overlap the first & third nozzle apertures, viewed in the second direction; the first piezoelectric element positioned to overlap the third piezoelectric element & doesn't overlap the second & fourth piezoelectric elements, viewed in the second direction; & the second piezoelectric element overlaps the fourth piezoelectric element & doesn't overlap the first & third piezoelectric elements.
REFERENCES:
patent: 05-193129 (1993-08-01), None
patent: 09-150508 (1997-06-01), None
patent: 2002-086716 (2002-03-01), None
patent: 2005-034997 (2005-02-01), None
Iino Shoichi
Kijima Takeshi
Feggins K.
Harness & Dickey & Pierce P.L.C.
Seiko Epson Corporation
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