Seiko Epson Corporation

Atsushi Muto

Hiroshige Owaki

Ryoichi Tanaka

Takahiro Kanegae

Nobuaki Ito

Yusuke Mizutaki

Satoshi Kimura

Masanao Sato

Hiroyuki Hagiwara

Masahiko Sato

Haruki Kobayashi

Tomohito Nakano

Nobuaki Azami

Wataru Ito

Ryosuke Tsuchihashi

A liquid ejecting apparatus includes a liquid ejecting head that has an ejection surface including a first nozzle row configured to eject a first ink and a second nozzle row configured to eject a second ink. The liquid ejecting head is configured to be held in a first posture in which the ejection surface is inclined with respect to a horizontal plane. The dynamic surface tension of the first ink is higher than the dynamic surface tension of the second ink. In the first posture, the first nozzle row is positioned above the second nozzle row with respect to a gravity direction.

Liquid ejecting apparatus and liquid ejecting head

An aqueous ink jet ink composition is for use in an ink jet recording method. The method includes ejecting ink from an ink jet head including nozzles. The nozzles are configured such that a shape of a side wall surface is a scalloped shape in which a scallop width Sand a notch depth Ssatisfy S/S&#x2265;4. The aqueous ink jet ink composition includes a pigment and a solvent that contains a specific compound.

Aqueous ink jet ink composition and ink jet recording method

A liquid discharging apparatus includes a first head, a second head, a third head, and a fourth head. The first head has a first part and a second part. The second part is coupled to the first part in a first direction. The second part has a width in a first direction that is shorter than a width of the first part in a second direction. A third part coupled to the first part has a width shorter than the width of the first part in the second direction and is at a position different from the second part in the second direction. The second head includes fourth, fifth, and sixth parts that are arranged similarly to the first, second, and third parts. Parts of the first, second, third, and fourth heads are positioned, respectfully, in the second part, the third part, the fifth part, and the sixth part.

Liquid discharging apparatus

a part of a first head is positioned in the second part, a part of a second head is positioned in the third part, a part of a third head is positioned in the fifth part, a part of a fourth head is positioned in the sixth part, and a first color is cyan and a third color is magenta.

A liquid ejecting apparatus includes a flow path member including a common liquid chamber communicating with each of a plurality of nozzles formed in a nozzle surface, via a corresponding pressure generating chamber, a supply port provided in an inner wall of the common liquid chamber to supply a liquid to the common liquid chamber, a discharge port provided in a ceiling of the common liquid chamber to discharge an air bubble from the common liquid chamber, and a wall continuously extending from the inner wall, and including a surface opposing the discharge port.

Liquid ejecting apparatus and cleaning method

A water-based ink includes a pigment, and water, in which a viscosity at 20&#xb0; C. is in a range of 2 mPa&#xb7;s to 7 mPa&#xb7;s, and a yield value at 20&#xb0; C. is less than 0.2 mPa, and the yield value at 20&#xb0; C. when evaporating 25% of the water is less than 0.8 mPa.

Water-based ink composition and method of discharging liquid droplet

A liquid discharge apparatus includes: a wiper; a wiping surface for wiped with the wiper; a plurality of nozzles provided in the wiping surface; a piezoelectric element for discharging inks from the nozzles; and a carriage unit and a cleaning unit configured to cause the wiper and the wiping surface to relatively move. In a moving direction of the wiper with respect to the wiping surface, a distance between a side of the wiping surface on an upstream side in the moving direction and the nozzle disposed on the most upstream side is shorter than a distance between a side of the wiping surface on a downstream side in the moving direction and the nozzle disposed on the most downstream side.

Liquid discharge apparatus and method for wiping liquid discharge head

A liquid discharge device includes a liquid discharge head that includes a nozzle from which liquid is discharged and a liquid channel communicating with the nozzle, and that discharges liquid from the nozzle. The nozzle has an inner wall surface having an uneven pattern including a recess where the inner diameter of the nozzle is increased and a projection where the inner diameter of the nozzle is smaller than that in the recess. In a case where ink is continuously discharged from an identical nozzle, at a time when a meniscus in the nozzle after previous discharge is located closer to an initial position before discharge than a center position between the initial position and a position at which the meniscus is most greatly drawn toward the liquid channel, subsequent discharge is performed.

Liquid discharge device, method for controlling liquid discharge device, and device driver

A liquid ejecting apparatus includes a liquid ejecting head that has a nozzle surface that is provided with nozzles for ejecting a liquid, a wiper for wiping the nozzle surface, a scanning mechanism configured to cause the nozzle surface and the wiper to perform a plurality of relative movements between the nozzle surface and the wiper, and a controller configured to control the scanning mechanism. The plurality of relative movements includes a first relative movement and a second relative movement that is different in the wiping from the first relative movement.

Liquid ejecting apparatus and wiping method

An ink jet recording apparatus records an image on a recording material by ejecting a first ink composition through at least one first liquid ejecting nozzle having an open end. The ink jet recording apparatus also includes a platen having a surface on which the recording medium is placed. The surface is away from the open end at a distance PG satisfying the relationship 0.5 mm&#x3c;PG&#x3c;2.5 mm. The first ink composition that has been ejected through the first liquid ejecting nozzle is split into a main droplet having a flying velocity Vm and at least one satellite droplet including a satellite droplet having a flying velocity Vs. The flying velocities Vm and Vs satisfy the relationship Vm&#x2212;Vs&#x3c;3 m/s.

Ink jet recording apparatus and recorded article

A liquid ejecting apparatus includes a liquid ejection head that reciprocates, a liquid supplying flow channel supplies a ink to the liquid ejection head, a non-return valve in the liquid supplying flow channel that opens when ink flows from an upstream region to a downstream region where the liquid ejection head is located and closes when ink flows from the downstream region to the upstream region, a volume changing unit that changes a volume of an inner space, and a stirring unit that stirs ink stored therein in accordance with the volume change of the volume changing unit, the stirring unit being disposed separately from the volume changing unit and they are disposed in the liquid supplying flow channel between the non-return valve and the liquid ejection head.

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Shiojiri, Japan

Atsushi Muto