公开(公告)号：US20230391092A1

公开(公告)日：2023-12-07

申请号：US18328131

申请日：2023-06-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Yu HASEGAWA ,  Eiichiro WATANABE ,  Masami OTA ,  Hiroaki OKUI

IPC: B41J2/175

CPC classification number: B41J2/175

Abstract: A liquid ejecting apparatus includes a liquid ejection head, a supply tank, a recovery tank, a supply flow path, a recovery flow path, a pressurizing mechanism pressurizing the inside of the supply tank, and a depressurizing mechanism depressurizing the inside of the recovery tank. A filling period, in which a filling process is performed to fill, with the liquid, a nozzle, the supply flow path, and the recovery flow path, includes a period that is after a meniscus is formed in the nozzle and before the liquid reaches the recovery flow path. In the period, the pressurizing and the depressurizing mechanisms are driven; and in the period, Pt_out>−|Pm| is satisfied, where Pm indicates a pressure at which the meniscus is broken and Pt_out indicates a pressure in the recovery tank.

公开(公告)号：US20230347645A1

公开(公告)日：2023-11-02

申请号：US18308055

申请日：2023-04-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Eiichiro WATANABE ,  Hiroaki OKUI ,  Yu HASEGAWA

IPC: B41J2/045

CPC classification number: B41J2/04588 ,  B41J2/04581

Abstract: A liquid ejecting apparatus includes a liquid ejection head, a circulation control section that controls a circulation operation of circulating the liquid in the first individual flow path, and a minute vibration control section that supplies a drive signal having a first waveform to the first piezoelectric element so as to control a minute vibration operation of causing the liquid in the first nozzle to vibrate to such a degree that the liquid is not ejected from the first nozzle. The circulation control section starts the circulation operation at a first time, and the minute vibration control section starts the minute vibration operation at a second time earlier than the first time.

公开(公告)号：US20210146686A1

公开(公告)日：2021-05-20

申请号：US16950523

申请日：2020-11-17

Applicant: SEIKO EPSON CORPORATION

Inventor： Motoki TAKABE ,  Eiju HIRAI ,  Hiroaki OKUI

IPC: B41J2/14 ,  H01L41/047

Abstract: when one position where a distance in the second direction to the partition wall located at a nearest position in the second direction is long is assumed as a first position, and the other position where the distance is short is assumed as a second position, both the piezoelectric body and the vibration plate are provided at the first position and the second position, and a thickness of the vibration plate at the second position is smaller than a thickness of the vibration plate at the first position.

公开(公告)号：US20200331269A1

公开(公告)日：2020-10-22

申请号：US16891164

申请日：2020-06-03

Applicant: SEIKO EPSON CORPORATION

Inventor： Isamu TOGASHI ,  Hiroaki OKUI ,  Yasuyuki KUDO ,  Fujio AKAHANE

IPC: B41J2/14

Abstract: A flow path structure includes: a substrate that includes a first surface and a second surface on a side opposite to the first surface; a supply port formed on the first surface; a plurality of discharge ports formed on the second surface; grooves that are formed on the first surface so as to extend in an X direction and communicate with the supply ports and with the plurality of discharge ports via through-holes formed on the substrate; and a sealing portion that is disposed on the first surface and seals each groove.

公开(公告)号：US20160347068A1

公开(公告)日：2016-12-01

申请号：US15163483

申请日：2016-05-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Masahisa NAWANO ,  Hiroaki OKUI ,  Yasuyuki KUDO

IPC: B41J2/165

CPC classification number: B41J2/16538 ,  B41J2/14233 ,  B41J2/155 ,  B41J2/175 ,  B41J2002/14362 ,  B41J2002/14419 ,  B41J2002/16502 ,  B41J2002/16558 ,  B41J2202/20

Abstract: A liquid ejecting head unit which includes a liquid ejecting head which includes a nozzle surface provided with nozzles, the nozzle surface being on a plane defined by two directions including a first and a second directions intersecting each other, a wiping unit comprising a wiper parallel to the first direction and configured to perform relative movement in the second direction between the wiper and the nozzle surface to wipe the nozzle surface, a recess defined by an edge provided along the first direction on the nozzle surface, and a controller for filling the recess with a liquid which spills from at least one nozzle among the nozzles, and for wiping the nozzle surface after wiping the recess.

Abstract translation: 一种液体喷射头装置，包括：液体喷射头，其包括设置有喷嘴的喷嘴表面，喷嘴表面在由包括彼此交叉的第一和第二方向的两个方向限定的平面上;擦拭单元，包括刮水平行于 所述第一方向被构造为在所述擦拭器和所述喷嘴表面之间沿所述第二方向执行相对运动以擦拭所述喷嘴表面，由沿着所述喷嘴表面上的所述第一方向设置的边缘限定的凹部，以及用于填充所述凹部的控制器， 在喷嘴中从至少一个喷嘴溢出的液体，以及在擦拭凹部之后擦拭喷嘴表面。

公开(公告)号：US20150258786A1

公开(公告)日：2015-09-17

申请号：US14638739

申请日：2015-03-04

Applicant: SEIKO EPSON CORPORATION

Inventor： Fujio AKAHANE ,  Isamu TOGASHI ,  Hiroaki OKUI ,  Yasuyuki KUDO

IPC: B41J2/14

CPC classification number: B41J2/14233 ,  B41J2/1433 ,  B41J2002/14306 ,  B41J2002/14362 ,  B41J2002/14419 ,  B41J2002/14491

Abstract: A flow path structure includes: a substrate that includes a first surface and a second surface on a side opposite to the first surface; a supply port formed on the first surface; a plurality of discharge ports formed on the second surface; grooves that are formed on the first surface so as to extend in an X direction and communicate with the supply ports and with the plurality of discharge ports via through-holes formed on the substrate; and a sealing portion that is disposed on the first surface and seals each groove.

Abstract translation: 流路结构包括：基板，其包括第一表面和与所述第一表面相对的一侧上的第二表面; 形成在第一表面上的供给口; 形成在所述第二表面上的多个排出口; 所述槽形成在所述第一表面上，以沿着X方向延伸并且经由形成在所述基板上的通孔与所述供给口和所述多个排出口连通; 以及密封部，其设置在所述第一表面上并密封每个凹槽。

公开(公告)号：US20230382125A1

公开(公告)日：2023-11-30

申请号：US18322666

申请日：2023-05-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Hiroaki OKUI

IPC: B41J2/175

CPC classification number: B41J2/17596

Abstract: A liquid ejecting apparatus includes: nozzles; individual flow paths communicating with each of the nozzles; a liquid storage portion storing liquid; a supply flow path for supplying the liquid from the liquid storage portion to the individual flow paths; a recovery flow path for recovering the liquid from the individual flow paths to the liquid storage portion; a bypass flow path that couples the supply flow path and the recovery flow path; and an on-off valve configured to close and open the recovery flow path, in which the on-off valve is disposed between the bypass flow path and the liquid storage portion in the recovery flow path, and a pressurization discharge operation of discharging the liquid from each of the nozzles by pressurizing the liquid in the supply flow path in a state in which the recovery flow path is closed by the on-off valve is executed.

公开(公告)号：US20220363055A1

公开(公告)日：2022-11-17

申请号：US17662919

申请日：2022-05-11

Applicant: SEIKO EPSON CORPORATION

Inventor： Eiichiro WATANABE ,  Hiroaki OKUI

IPC: B41J2/14 ,  B41J2/175

Abstract: The control section sets, as a first flow rate, a flow rate of the liquid, which is circulated by the circulating mechanism, per unit time, during an ejection operation of ejecting the liquid from the liquid ejecting head. The control section sets, as a second flow rate greater than the first flow rate, a flow rate of the liquid, which is circulated by the circulating mechanism, per unit time, during a recovery operation of recovering a state of the liquid ejecting head.

公开(公告)号：US20220234350A1

公开(公告)日：2022-07-28

申请号：US17582304

申请日：2022-01-24

Applicant: Seiko Epson Corporation

Inventor： Kentaro MURAKAMI ,  Hiroaki OKUI

IPC: B41J2/045 ,  B41J2/175

Abstract: A liquid ejecting head includes: a nozzle; a flow path member in which a flow path communicating with the nozzle is formed and which has an inner wall surface defining the flow path and an outer wall surface that faces away from the flow path with respect to the inner wall surface; and a temperature sensor disposed on a part of the outer wall surface and configured to detect a temperature of the liquid in the flow path. The flow path includes a narrowed region having a narrow width in a second direction orthogonal to a first direction in a direction in which the flow path extends, and the temperature sensor is disposed on a portion of the outer wall surface that forms the narrowed region.

公开(公告)号：US20210370673A1

公开(公告)日：2021-12-02

申请号：US17303416

申请日：2021-05-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Hiroaki OKUI

IPC: B41J2/14

Abstract: A liquid ejecting head includes head chips configured to eject a liquid toward a medium in a first-direction, in which, when a width direction of the medium is a second-direction, a direction orthogonal to the first-direction and the second-direction is a third-direction, and a direction perpendicular to the first-direction and intersecting the second-direction and the third-direction is a fourth-direction, the head chips include a first-chip group in which first head-chips are arranged side by side in the second-direction, the first-head chip having a first-nozzle row formed by arranging first-nozzles side by side in the fourth-direction, and a second-chip group in which second-head chips are arranged side by side in the second-direction, the second-head chip having a second-nozzle row formed by arranging second-nozzles side by side in the fourth-direction, and the first-chip group is arranged side by side in the third-direction with respect to the second-chip group.