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公开(公告)号：US20220348016A1
公开(公告)日：2022-11-03
申请号：US17660933
申请日：2022-04-27
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Takanori AIMONO , Yuta OKAWA , Shotaro TAMAI
IPC: B41J2/14
Abstract: The control portion controls (i) a discharging operation of discharging the liquid from the plurality of nozzles by driving the plurality of energy generation elements and (ii) a pressurization operation of pressurizing the liquid from the individual flow path side in a state in which the plurality of nozzles are sealed by the sealing portion.
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公开(公告)号：US20220348014A1
公开(公告)日：2022-11-03
申请号：US17660872
申请日：2022-04-27
Applicant: Seiko Epson Corporation
Inventor： Takahiro KATAKURA , Takanori AIMONO , Shotaro TAMAI
IPC: B41J2/14
Abstract: When a pressure of the liquid inside the common supply flow path is higher than a pressure of the liquid inside the pressure chamber, the adjustment portion changes the cross-sectional area to be a first cross-sectional area when a pressure difference, which is a difference between the pressure of the liquid inside the common supply flow path and the pressure of the liquid inside the pressure chamber, is a first pressure difference, and changes the cross-sectional area to be a second cross-sectional area larger than the first cross-sectional area when the pressure difference is a second pressure difference larger than the first pressure difference.
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公开(公告)号：US20210229423A1
公开(公告)日：2021-07-29
申请号：US17154725
申请日：2021-01-21
Applicant: SEIKO EPSON CORPORATION
Inventor： Toshiro MURAYAMA , Takahiro KATAKURA , Nobuaki ITO
IPC: B41J2/045
Abstract: A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition, and a driving step of applying the drive pulse to the drive element. The drive pulse includes a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential is to be applied after the first potential, and the third potential is to be applied after the second potential. In the liquid discharge method, in the driving step, the drive pulse in which a time of the second potential varies depending on the recording condition acquired in the acquisition step is applied to the drive element.
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公开(公告)号：US20210229420A1
公开(公告)日：2021-07-29
申请号：US17153535
申请日：2021-01-20
Applicant: SEIKO EPSON CORPORATION
Inventor： Toshiro MURAYAMA , Takahiro KATAKURA , Nobuaki ITO
Abstract: A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition including a first discharge characteristic and a second discharge characteristic of the liquid from the liquid discharge head, a determination step of determining the drive pulse to be applied to the drive element, based on the recording condition, and a driving step of applying the drive pulse determined in the determination step to the drive element. In the liquid discharge method, in the determination step, the drive pulse is determined by a determination method subjected to weighting in which a weight of the first discharge characteristic is greater than a weight of the second discharge characteristic.
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公开(公告)号：US20190160810A1
公开(公告)日：2019-05-30
申请号：US16201886
申请日：2018-11-27
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Keigo SUGAI , Hirofumi SAKAI , Shinichi NAKAMURA , Junichi SANO
IPC: B41J2/045
Abstract: A liquid ejecting apparatus includes a plurality of nozzles, a plurality of pressure chambers, a plurality of pressure-generation-elements, a plurality of inflow channels, a first-channel-resistance-changing-section, and a control-unit. The control-unit repeats control of switching between a first state in which the control-unit controls the first-channel-resistance-changing-section to collectively increase channel resistance of the inflow channels and a second state in which the control-unit controls the first-channel-resistance-changing-section to collectively decrease the channel resistance of the inflow channels. The control-unit, with respect to a pressure-generation-element corresponding to an ejection nozzle, performs ejection control including extrusion control to reduce the volume of the pressure chamber in the first state, and with respect to a pressure-generation-element corresponding to a non-ejection nozzle, the control-unit performs non-ejection control including intake and exhaust control in which the volume of the pressure chamber is expanded in the first state and is reduced in the second state.
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Patent Agency Ranking
公开(公告)号：US20180345663A1
公开(公告)日：2018-12-06
申请号：US15991243
申请日：2018-05-29
Applicant: SEIKO EPSON CORPORATION
Inventor： Hirofumi SAKAI , Takahiro KATAKURA , Keigo SUGAI , Shinichi NAKAMURA , Junichi SANO
Abstract: A liquid discharging apparatus includes: a liquid compartment; a flowing-in passage that is in communication with the liquid compartment through a flowing-in opening, the liquid flowing through the flowing-in passage into the liquid compartment; a nozzle that is in communication with the liquid compartment through a communication opening; a capacity changer that causes the liquid contained in the liquid compartment to be discharged from the nozzle by causing a displacement of an inner wall surface of the liquid component and changing capacity of the liquid compartment; and a flowing-in passage resistance changer that changes capacity of the flowing-in passage to change flow resistance of the flowing-in passage. In the liquid compartment, as viewed from the flowing-in opening, the communication opening is located in front of a center-of-displacement portion, an amount of the displacement of which is largest in the inner wall surface displaced by the capacity changer.
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27.发明申请公开(公告)号：US20160347001A1
公开(公告)日：2016-12-01
申请号：US15163287
申请日：2016-05-24
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Takeshi MIYASHITA , Tomoyuki KAMAKURA , Tetsuhiko TAKEUCHI
IPC: B29C67/00
Abstract: A three-dimensional forming apparatus includes: a stage; a material supply unit that supplies the stage with a sintered material including metal powder and a binder; a head unit that includes an energy radiation unit supplying energy capable of sintering the sintered material to the sintered material supplied by the material supply unit; a head base that holds a plurality of the head units; and a driving unit that is capable of three-dimensionally moving the head base relative to the stage.
Abstract translation: 三维成形装置包括：台架; 向所述台阶供给包含金属粉末和粘合剂的烧结体的材料供给单元; 头单元，其包括能量辐射单元，其提供能够将所述烧结材料烧结到由所述材料供应单元供应的所述烧结材料的能量; 保持多个头单元的头座; 以及能够相对于台架三维移动头座基座的驱动单元。
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公开(公告)号：US20240066860A1
公开(公告)日：2024-02-29
申请号：US18456662
申请日：2023-08-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Toshiro MURAYAMA
CPC classification number: B41J2/04581 , B41J2/04588 , B41J2/14233
Abstract: A liquid ejection apparatus includes an ejection unit including a nozzle, a pressure chamber, and a piezoelectric element that applies pressure fluctuations to a liquid in the pressure chamber according to a supplied drive signal, a drive signal generation unit that generates the drive signal, and a detection unit that detects a residual vibration generated in the pressure chamber. The drive signal generation unit generates the drive signal having a detection waveform including an expansion element that changes in potential from a first potential to a second potential to expand the pressure chamber, and an expansion potential maintaining element that maintains the second potential following the expansion element. A length of a period from a start to an end of a change in potential from the first potential to the second potential is equal to or greater than a length of a natural vibration cycle of the ejection unit.
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公开(公告)号：US20220305779A1
公开(公告)日：2022-09-29
申请号：US17653903
申请日：2022-03-08
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Takanori AIMONO , Shotaro TAMAI
IPC: B41J2/045
Abstract: Provided is a drive method of a liquid discharging head including a first step of acquiring physical property information indicating a physical property of liquid in the liquid discharging head, a second step of determining a waveform of a drive signal based on the physical property information, a third step of forming a first liquid column by supplying a first waveform, which is included in a first drive signal among the drive signals having the waveforms determined in the second step, to a drive element, and a fourth step of, when the first liquid column is formed, forming a second liquid column by supplying a second waveform, which is included in a second drive signal among the drive signals having the waveforms determined in the second step, to the drive element, and thereafter discharging a part or all of liquid constituting the second liquid column as a droplet.
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公开(公告)号：US20220288926A1
公开(公告)日：2022-09-15
申请号：US17653759
申请日：2022-03-07
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro KATAKURA , Takanori AIMONO , Shotaro TAMAI
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.
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