Patent ID: 7156501
Filing Date: 2007-01-02
Classification: B41J

Abstract:
1. An inkjet head comprising: a flow path unit including; plural nozzles which ejects ink; plural pressure chambers having ends connected to the nozzles respectively, which are arranged in a form of a matrix along a plane to thereby form pressure chamber columns in a first direction in the plane, the plural pressure chambers including; first pressure chamber columns, each including pressure chambers having the nozzles unevenly distributed on one side of a second direction crossing the first direction and first connection holes connected to the nozzles respectively; and second pressure chamber columns, each including pressure chambers having the nozzles unevenly distributed on the other side of the second direction and second connection holes connected to the nozzles respectively; and plural common ink paths extending along the first direction and connected to the pressure chambers through ink inlets respectively, wherein the first and second pressure chamber columns are arranged alternately in the plane, such that each of a plurality of first pressure chamber columns is located immediately next to, and between, two second pressure chamber columns, and each of a plurality of second pressure chamber columns is located immediately next to, and between, two first pressure chamber columns, two pressure chamber columns are arranged opposite to each of the common ink paths and configured by one of the first pressure chamber columns and one of the second pressure chamber columns which are adjacent with each other, the first connection holes and the second connection holes are arranged side by side in the first direction on opposite sides of a corresponding common ink path when viewed from a third direction perpendicular to the plane, and the first connection holes and the second connection holes are arranged and at least partially overlapped each other between two adjacent common ink paths when viewed from the first direction.