Liquid ejection head
AssigneeCanon Kabushiki Kaisha
InventorYasunori Takei
Life of this patent
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Abstract
A liquid ejection head capable of achieving satisfactory printing without nozzle misfiring in an area close to an end of a nozzle row and droplet misdirection is provided. The ejection orifices, except for dummy orifices, are provided with protrusions. Four operative ejection orifices located close to each of the ends of each ejection orifice row are defined as end-located ejection orifices. Each of the protrusions provided in the end-located ejection orifices has a shorter length than that of the protrusion provided in the ejection orifice located in the central portion of the nozzle row.
Claims8
A liquid ejection head comprising a plurality of ejection orifices facilitating ejecting a predetermined amount of liquid therefrom,
- wherein the plurality of ejection orifices are shaped with reference to a single opening shape defined as a reference opening shape, and
- wherein the plurality of ejection orifices are arranged to form ejection orifice rows, and each ejection orifice located in a portion of each ejection orifice row other than end portions of the ejection orifice row comprises a protrusion protruding into a center of the ejection orifice of the reference opening shape, whereby the ejection orifice has a longer length of a periphery than that of each ejection orifice located in the end portions of the ejection orifice row.
Dependencies are inferred from the claim text.