Liquid Ejecting Head
AssigneeSeiko Epson Corporation
InventorsTakanori AIMONO, Takahiro KATAKURA, Mitsuki EBISAWA
Life of this patent
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Abstract
A liquid ejecting head includes a nozzle that ejects liquid, in which the nozzle includes a first nozzle portion that ejects the liquid, the first nozzle portion includes a plurality of protrusion portions that protrude toward a central axis of the nozzle with respect to an inner side surface that is a part of a side surface along an ejection direction as a direction in which the liquid is ejected from the first nozzle portion, and a scalloped structure having a plurality of convex portions and a plurality of concave portions on the inner side surface. Wettability of at least one of the plurality of convex portions is higher than wettability of at least one of the plurality of concave portions.
Claims16
A liquid ejecting head comprising:
- a nozzle that ejects liquid, wherein
- the nozzle includes a first nozzle portion that ejects the liquid,
- the first nozzle portion includes:
- a plurality of protrusion portions that protrude toward a central axis of the nozzle with respect to an inner side surface that is a part of a side surface along an ejection direction as a direction in which the liquid is ejected from the first nozzle portion;
- and
- a scalloped structure having a plurality of convex portions and a plurality of concave portions on the inner side surface,
- wherein wettability of at least one of the plurality of convex portions is higher than wettability of at least one of the plurality of concave portions.
A liquid ejecting head comprising:
- a nozzle that ejects liquid, wherein
- the nozzle includes a first nozzle portion that ejects the liquid,
- the first nozzle portion includes:
- a plurality of protrusion portions that protrude toward a central axis of the nozzle with respect to an inner side surface that is a part of a side surface along an ejection direction as a direction in which the liquid is ejected from the first nozzle portion;
- and
- a scalloped structure having a plurality of convex portions and a plurality of concave portions on the inner side surface,
- wherein a meniscus of the liquid is formed, before the liquid is ejected from the first nozzle portion, on a first convex portion of the plurality of convex portions, and
- wettability of the first convex portion is higher than wettability of a concave portion contiguous with the first convex portion.
Dependencies are inferred from the claim text.