An inkjet head comprises a plurality of individual electrodes each of which includes a first part and a second part connected to an end portion B of the first part. The end portion B is one of the end portions of a first part in a longitudinal direction of a pressure chamber. The second part of each of the individual electrodes corresponding to a first pressure chamber line is positioned between two first parts corresponding to two respective pressure chambers neighboring each other in a second pressure chamber line, so that an end portion C of the second part crosses over a line connecting each end portion D of the two first parts.

Claims

11 · 1 independent · depth 4

11 granted claims

›1.independentAn inkjet head comprising:na passage unit having a plurality of pressure chambers formed therein, each of the pressure chambers being elongated in a l…+10

An inkjet head comprising:na passage unit having a plurality of pressure chambers formed therein, each of the pressure chambers being elongated in a longitudinal direction in a plan view;and a piezoelectric sheet laminated on the passage unit and having a plurality of individual electrodes positioned thereon so that the individual electrodes are opposed to the respective pressure chambers,wherein:nthe plurality of the pressure chambers include a plurality of pressure chamber lines which are in parallel with one another,an end portion in the longitudinal direction, of each of the pressure chambers in a first pressure chamber line is positioned between two pressure chambers neighboring each other in a second pressure chamber line, so as to cross over a line connecting each end portion A of the two pressure chambers, the second pressure chamber line neighboring the first pressure chamber line, and the end portion A being one of the end portions of a pressure chamber in the longitudinal direction closer to the first pressure chamber line,each of the individual electrodes include a first part and a second part, the first part being within a projection area of the corresponding pressure chamber and being elongated in the same direction of the pressure chamber, the second part being outside the projection area and connected to an end portion B of the first part, and the end portion B being one of both end portions of a first part in the longitudinal direction, andthe second part of each of the individual electrodes corresponding to the first pressure chamber line is positioned between two first parts corresponding to two respective pressure chambers neighboring each other in the second pressure chamber line, so that an end portion C of the second part crosses over a line connecting each end portion D of the two first parts, the end portion C being one end portion of a second part in the longitudinal direction furthest from an end portion E of the first part connected to the second part, the end portion D being one of the end portions of a first part in the longitudinal direction closer to the first pressure chamber line, and the end portion E being one end portion in the longitudinal direction, of a first part other than the end portion B.

›2.↳ 1The inkjet head according to claim 1, wherein each of the second parts has a portion enlarged from the end portion B of the first part connected to th…d2+2

›5.↳ 1The inkjet head according to claim 1, wherein each of the pressure chambers has an acute angle at both of the end portions of the pressure chamber in …d2

›6.↳ 1The inkjet head according to claim 1, wherein each of the individual electrodes has an acute angle at the end portion E of the first part in a plan vi…d2

›7.↳ 1The inkjet head according to claim 1, wherein each of the second parts is connected to only one of the end portions of the first part.d2

›8.↳ 1The inkjet head according to claim 1,nwherein the end portions of each of the pressure chambers in the first pressure chamber line are positioned betw…d2

›9.↳ 1The inkjet head according to claim 1, wherein the longitudinal direction crosses the direction of each of the pressure chamber lines.d2

›10.↳ 1The inkjet head according to claim 1, wherein the piezoelectric sheet is sandwiched between common electrodes and the individual electrodes positioned…d2

›11.↳ 1The inkjet head according to claim 1,nwherein the passage unit includes a plurality of laminated plates so that a manifold channel as a common ink pas…d2

Classifications

6 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B41J2/145
B41J2/045

USPC · US Patent Classification

347/68347/40347/72347/71

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Pendency

1.9 y

708 days filing → grant

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none on record

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1 RCE

Examiner

Stephen D Meier

art unit 2853 · TC 2800

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20090189959 A1	30 Jul 2009

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