公开(公告)号：US20210276328A1

公开(公告)日：2021-09-09

申请号：US17188689

申请日：2021-03-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Shotaro TAMAI ,  Yuma FUKUZAWA ,  Shohei MIZUTA

IPC: B41J2/14 ,  B41J2/045

Abstract: A liquid ejecting head includes: a pressure chamber substrate; and a communication plate, in which the pressure chamber substrate includes a first pressure chamber that extends in a first direction and applies pressure to a liquid, and a first supply channel, and the communication plate includes a first communication channel that extends in a second direction intersecting with the first direction and communicates with the first supply channel, and a second supply channel that communicates with the first supply channel and the first pressure chamber.

公开(公告)号：US20210001630A1

公开(公告)日：2021-01-07

申请号：US16918146

申请日：2020-07-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Akinori TANIUCHI ,  Akira MIYAGISHI ,  Toshiro MURAYAMA ,  Shotaro TAMAI

IPC: B41J2/14 ,  B41J2/175

Abstract: A liquid ejecting head includes a first flow path extending in a first axial direction between a supply port and a discharge port, and a nozzle that is provided to branch from the first flow path and that discharges a liquid along a second axial direction orthogonal to the first axial direction. The nozzle includes a first nozzle portion in which a first opening for discharging the liquid is formed and a second nozzle portion in which a second opening that is a coupling port with the first flow path is formed, and a diameter r2 of the second opening in the first axial direction is larger than a diameter r1 of the first opening in the first axial direction.

公开(公告)号：US20230249459A1

公开(公告)日：2023-08-10

申请号：US18164231

申请日：2023-02-03

Applicant: SEIKO EPSON CORPORATION

Inventor： Takanori AIMONO ,  Yuma FUKUZAWA ,  Shohei MIZUTA ,  Shotaro TAMAI ,  Shun KATSUIE

IPC: B41J2/14

CPC classification number: B41J2/14201 ,  B41J2002/14467

Abstract: A liquid ejecting head includes: a nozzle; first to fourth pressure chambers; a communication flow path coupled to the nozzle and communicating between the nozzle and the first to fourth pressure chambers; first to fourth flow paths coupling the communication flow path and the first to fourth pressure chambers; a first-common-liquid-chamber communicating with the first-pressure-chamber and the second-pressure-chamber; and a second-common-liquid-chamber communicating with the third-pressure-chamber and the fourth-pressure-chamber. The first-flow-path and the second-flow-path are arranged side by side in a first-direction, the third-flow-path and the fourth-flow-path are arranged side by side in the first-direction, and the first-flow-path and the second-flow-path, and the third-flow-path and the fourth-flow-path are arranged to be shifted in a second-direction orthogonal to the first-direction. The first-flow-path is shifted from each of the third-flow-path and the fourth-flow-path in the first-direction, and the second-flow-path is shifted from each of the third-flow-path and the fourth-flow-path in the first-direction.

公开(公告)号：US20210162758A1

公开(公告)日：2021-06-03

申请号：US17108702

申请日：2020-12-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuma FUKUZAWA ,  Shotaro TAMAI ,  Yoichi NAGANUMA ,  Akira MIYAGISHI ,  Kazuaki UCHIDA

IPC: B41J2/14

Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.

公开(公告)号：US20210114375A1

公开(公告)日：2021-04-22

申请号：US17135336

申请日：2020-12-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Shotaro TAMAI ,  Kazuaki UCHIDA ,  Akinori TANIUCHI

IPC: B41J2/14

Abstract: The individual flow path includes a nozzle communicating with an outside, a first flow path, in the middle of which the nozzle is disposed and which extends in a first direction that is an in-plane direction of a nozzle surface of the nozzle plate in which the nozzle opens, a second flow path coupled to the first flow path and extending in a second direction other than the first direction, a third flow path coupled to the second flow path and extending in the third direction other than the second direction, and a pressure chamber which is disposed in the third flow path and in which a pressure change is induced by the energy generating element. A cross-sectional area of the first flow path is smaller than a cross-sectional area of the second flow path.

公开(公告)号：US20230249457A1

公开(公告)日：2023-08-10

申请号：US18163034

申请日：2023-02-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Takanori AIMONO ,  Yuma FUKUZAWA ,  Shohei MIZUTA ,  Shotaro TAMAI ,  Shun KATSUIE

IPC: B41J2/14

CPC classification number: B41J2/14 ,  B41J2002/14338

Abstract: A liquid ejecting head includes: a nozzle; first to fourth pressure chambers; a communication flow path communicating between the nozzle and the first to fourth pressure chambers; first to fourth driving elements; a first common liquid chamber communicating with the first and the second pressure chambers; and a second common liquid chamber communicating with the third and the fourth pressure chambers. A first joining position from the first pressure chamber and the second pressure chamber to the nozzle is closer to end portions of the first pressure chamber and the second pressure chamber on a nozzle side than to the nozzle, and a second joining position from the third pressure chamber and the fourth pressure chamber to the nozzle is closer to end portions of the third pressure chamber and the fourth pressure chamber on the nozzle side than to the nozzle.

公开(公告)号：US20210362498A1

公开(公告)日：2021-11-25

申请号：US17328104

申请日：2021-05-24

Applicant: Seiko Epson Corporation

Inventor： Shotaro TAMAI ,  Yoichi NAGANUMA ,  Yuma FUKUZAWA ,  Hitoshi TAKAAI ,  Eiju HIRAI

IPC: B41J2/14 ,  B41J2/045

Abstract: A liquid ejecting head includes: a pressure chamber; a piezoelectric element that generates energy for applying pressure to an ink in the pressure chamber; a nozzle channel that extends in the X-axis direction and communicates with a nozzle for ejecting the ink; a supply communication channel which enables the pressure chamber and the nozzle channel to communicate with each other; a discharge communication channel which communicates with the nozzle channel; a wiring substrate electrically coupled to a drive circuit that drives the piezoelectric element; and a wiring section that electrically couples the wiring substrate and the piezoelectric element, in which, as viewed in the Z-axis direction orthogonal to the X-axis direction, the wiring section is provided at a position at which the wiring section overlaps the nozzle channel, and the wiring section extends in the ±Q direction, which differs from the X-axis direction.

公开(公告)号：US20210162753A1

公开(公告)日：2021-06-03

申请号：US17108714

申请日：2020-12-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuma FUKUZAWA ,  Shotaro TAMAI ,  Yoichi NAGANUMA ,  Akira MIYAGISHI ,  Kazuaki UCHIDA

IPC: B41J2/14 ,  B41J2/18

Abstract: A liquid ejecting head including: an individual flow path row in which a plurality of individual flow paths communicating with a nozzle that ejects a liquid in a first axis direction are arranged in parallel along a second axis orthogonal to a first axis, and a first common liquid chamber communicating with the plurality of individual flow paths, in which each of the plurality of individual flow paths has a pressure chamber that stores a liquid.

公开(公告)号：US20210094296A1

公开(公告)日：2021-04-01

申请号：US17031617

申请日：2020-09-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Shotaro TAMAI ,  Nobuhiro NAITO ,  Yuma FUKUZAWA ,  Akinori TANIUCHI ,  Shohei MIZUTA

IPC: B41J2/14

Abstract: The communication plate has a first layer that defines a wall surface of the communication flow channel, a second layer stacked on a side of the first layer opposite to the wall surface, and a third layer stacked on a side of the second layer opposite to the first layer, and the thermal expansion coefficient of the second layer is smaller than the thermal expansion coefficient of the first layer and is smaller than the thermal expansion coefficient of the third layer.

公开(公告)号：US20240316922A1

公开(公告)日：2024-09-26

申请号：US18731911

申请日：2024-06-03

Applicant: SEIKO EPSON CORPORATION

Inventor： Takahiro KATAKURA ,  Takanori AIMONO ,  Shotaro TAMAI

IPC: B41J2/045 ,  B41J2/165

CPC classification number: B41J2/04588 ,  B41J2/0451 ,  B41J2/165

Abstract: Provided is a drive method of a liquid discharging head including a first step of forming a first liquid column by supplying a drive signal having a first waveform to a drive element, and a second step of, when the first liquid column is formed, forming a second liquid column by supplying a drive signal having a second waveform to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet, in which when a drive signal having the first waveform but not having the second waveform is supplied to the drive element, a droplet is not discharged from the discharging portion, and when a drive signal having the second waveform but not having the first waveform is supplied to the drive element, a droplet is not discharged from the discharging portion.