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US 11,305,536 B2Granted
Ink-jet head having passage unit and actuator units attached to the passage unit, and ink-jet printer having the ink-jet head
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsAtsuo Sakaida, Takeshi Asano, Atsushi Hirota
Life of this patent
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Abstract
A printhead module includes a plurality of rows of printhead nozzles, at least some of the rows including at least one displaced row portion, the displacement of the row portion including a component in a direction normal to that of a pagewidth to be printed, wherein the displaced row portions of at least some of the rows are different in length than the displaced row portions of at least some of the other rows.
Claims7
An ink-jet head comprising:
- a plurality of nozzles;
- and
- a plurality of pressure chambers which communicate with the plurality of nozzles, respectively, the plurality of pressure chambers being apart from the plurality of nozzles in a first direction, wherein,
- the plurality of nozzles forms a plurality of nozzle groups, the plurality of nozzle groups aligned in a second direction orthogonal to the first direction,
- the plurality of nozzle groups includes:
- a first nozzle group which is composed of the nozzles arranged in a first region having a trapezoidal shape in a plane orthogonal to the first direction;
- and
- a second nozzle group which is composed of the nozzles arranged in a second region overlapping with the first region in a third direction orthogonal to the first and second directions, and
- a minimum distance between a nozzle in the first nozzle group and a nozzle in the second nozzle group is larger than a minimum distance between two nozzles in each of the first and second nozzle groups both in the second direction and the third direction.
6 more elements
Dependencies are inferred from the claim text.