公开(公告)号：US10994533B2

公开(公告)日：2021-05-04

申请号：US16356021

申请日：2019-03-18

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/045 ,  B41J2/14

摘要： A liquid discharge device includes a liquid discharge head including a plurality of liquid chambers respectively communicating with a plurality of nozzles and circulating liquid therethrough. Each liquid chamber is provided with a pressure generator for discharging the liquid from a corresponding nozzle. The liquid discharge device further includes a waveform data memory to store drive waveform data including discharge drive waveform data for discharging the liquid according to image data and micro-vibration drive waveform data for causing a micro vibration of a meniscus of the liquid discharge head. The liquid discharge device further includes circuitry configured to generate a drive waveform based on the drive waveform data; apply, to the pressure generator, a discharge drive waveform based on the discharge drive waveform data, in a printing area; and apply, to the pressure generator, a micro-vibration drive waveform based on the micro-vibration drive waveform data, in a non-print area.

公开(公告)号：US10737491B2

公开(公告)日：2020-08-11

申请号：US16274380

申请日：2019-02-13

申请人： Toshimichi Odaka ,  Takahiro Yoshida ,  Takakazu Kihira

发明人： Toshimichi Odaka ,  Takahiro Yoshida ,  Takakazu Kihira

IPC分类号： B41J2/14 ,  B41J2/175 ,  B41J2/185 ,  B41J2/165 ,  B41J2/18

摘要： A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common supply channel, and a common collection channel. The plurality of nozzles discharges a liquid. The plurality of individual liquid chambers communicates with the plurality of nozzles, respectively. The common supply channel communicates with the plurality of individual liquid chambers. The common collection channel communicates with the plurality of individual liquid chambers. At least a part of at least one of the common supply channel and the common collection channel is disposed at a position overlapping with the plurality of individual liquid chambers when the plurality of individual liquid chambers is projected in a vertical direction.

公开(公告)号：US10300706B2

公开(公告)日：2019-05-28

申请号：US15852062

申请日：2017-12-22

申请人： Yoshimasa Miyazawa ,  Tatsuya Tomura ,  Takuya Fujita ,  Hisashi Habashi ,  Takahiro Yoshida

发明人： Yoshimasa Miyazawa ,  Tatsuya Tomura ,  Takuya Fujita ,  Hisashi Habashi ,  Takahiro Yoshida

IPC分类号： B41J2/14 ,  B41J2/18 ,  B41J2/21 ,  B41J2/045 ,  B41J2/175 ,  C09D11/32 ,  C09D11/40 ,  C09D11/322

摘要： An inkjet printing device includes an ink containing a silver particle and water; and an ink discharging head including multiple nozzles to discharge the ink, individual liquid chambers communicating with the multiple nozzles, a common liquid chamber to supply the ink to the individual liquid chambers, a circulating flow path communicating with the individual liquid chambers, a common circulating liquid chamber communicating with the circulating flow path, and a pressure generator to apply a pressure to the ink in the individual liquid chambers, wherein the proportion of the silver particle to the ink is from 1 to 15 percent by mass.

公开(公告)号：US10286666B2

公开(公告)日：2019-05-14

申请号：US15794068

申请日：2017-10-26

申请人： Masahiko Ishikawa ,  Hiroshi Gotou ,  Takahiro Yoshida ,  Yukio Otome

发明人： Masahiko Ishikawa ,  Hiroshi Gotou ,  Takahiro Yoshida ,  Yukio Otome

IPC分类号： B41J2/14

摘要： An ink discharge device is provided including an ink, an ink discharge head, and a circulator. The ink discharge head includes a nozzle, an individual liquid chamber communicated with the nozzle, a flow-in channel, and a flow-out channel. The circulator circulates the ink by letting the ink flow into the individual liquid chamber via the flow-in channel and flow out from the individual liquid chamber via the flow-out channel. A flow rate of the circulated ink is 0.10 to 1.50 times a maximum dischargeable rate of the ink discharge head. A dynamic surface tension A of the ink at 25° C. is 34.0 mN/m or less when measured by a maximum bubble pressure method at a surface lifetime of 15 msec, and the dynamic surface tension A and a static surface tension B of the ink at 25° C. satisfy the following relation: 10.0(%)≤[(A−B)/(A+B)]×100≤19.0(%).

公开(公告)号：US10166774B2

公开(公告)日：2019-01-01

申请号：US15434479

申请日：2017-02-16

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/14

摘要： A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a circulation channel, a circulation common liquid chamber, a common liquid chamber, and a vibration damping member. The plurality of nozzles discharges liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The circulation channel is communicated with the plurality of individual liquid chambers. The circulation common liquid chamber is communicated with the circulation channel. The common liquid chamber supplies the liquid to the plurality of individual liquid chambers. The common liquid chamber includes a first portion disposed side by side with the circulation common liquid chamber in an in-plane direction and a second portion having a width greater than a width of the first portion in the in-plane direction. The vibration damping member is recoverably deformable and constitutes a wall surface of the second portion of the common liquid chamber.

公开(公告)号：US10160226B2

公开(公告)日：2018-12-25

申请号：US15638724

申请日：2017-06-30

申请人： Tomohiko Kohda ,  Takahiro Yoshida ,  Shiomi Andou ,  Takayuki Nakai ,  Kanshi Abe ,  Takeshi Shimizu ,  Ryo Kasahara

发明人： Tomohiko Kohda ,  Takahiro Yoshida ,  Shiomi Andou ,  Takayuki Nakai ,  Kanshi Abe ,  Takeshi Shimizu ,  Ryo Kasahara

IPC分类号： B41J2/175 ,  B41J2/18 ,  B41J2/14

摘要： A liquid discharging head includes: a nozzle plate having a plurality of nozzles from which liquid is discharged; a channel member including a plurality of individual liquid chambers that lead to the plurality of nozzles, respectively, and including a plurality of circulation channels that lead to the plurality of individual liquid chambers, respectively; and a common liquid chamber member for forming a common liquid chamber that supplies liquid to the plurality of individual liquid chambers and for forming a circulation common liquid chamber that leads to the plurality of circulation channels.

公开(公告)号：US10076918B2

公开(公告)日：2018-09-18

申请号：US15439327

申请日：2017-02-22

申请人： Tomoaki Murakami ,  Takahiro Yoshida ,  Masami Iwama ,  Takakazu Kihira

发明人： Tomoaki Murakami ,  Takahiro Yoshida ,  Masami Iwama ,  Takakazu Kihira

IPC分类号： B41J29/377

CPC分类号： B41J29/377 ,  B41J2/14024 ,  B41J2/1408 ,  B41J2/14201 ,  B41J2/14314 ,  B41J2002/14362 ,  B41J2202/08

摘要： A liquid-discharging head includes a pressure-generating element configured to be actuated to apply pressure on liquid in a pressure chamber from which the liquid is discharged through a nozzle, an actuation controller configured to control actuation of the pressure-generating element, a heat-releasing member configured to contact the actuation controller, and a cover member configured to cover the actuation controller and part of the heat-releasing member. The heat-releasing member includes a first heat-releasing member and a second heat-releasing member. The first heat-releasing member is arranged outside the cover member and has a surface exposed to external air. The second heat-releasing member is arranged inside the cover member and has a first end portion to contact the actuation controller. The first heat-releasing member and the second heat-releasing member are arranged to contact each other.

公开(公告)号：US20180105711A1

公开(公告)日：2018-04-19

申请号：US15783180

申请日：2017-10-13

申请人： Keita KATOH ,  Hiroshi Gotou ,  Takahiro Yoshida ,  Akihiko Matsuyama ,  Masahiko Ishikawa ,  Yoshiki Yanagawa

发明人： Keita KATOH ,  Hiroshi Gotou ,  Takahiro Yoshida ,  Akihiko Matsuyama ,  Masahiko Ishikawa ,  Yoshiki Yanagawa

IPC分类号： C09D11/107 ,  B41J2/145 ,  B41J2/14 ,  C09D11/033 ,  C09D11/36 ,  C09D11/326 ,  C09D11/322

CPC分类号： C09D11/107 ,  B41J2/14145 ,  B41J2/14201 ,  B41J2/14274 ,  B41J2/14314 ,  B41J2/145 ,  B41J2002/14403 ,  C08F293/00 ,  C09D11/033 ,  C09D11/322 ,  C09D11/326 ,  C09D11/36 ,  C09D11/38

摘要： An ink discharge device including an ink, an ink discharge head, and a negative pressure generator is provided. The ink comprises water, a colorant, an organic solvent X having a solubility parameter of from 8.9 to 12.0 and comprising no glycol ether compound, and a copolymer comprising a structural unit represented by the following formula (1): where R1 represents a hydrogen atom or methyl group and Y represents an alkylene group having 2 to 18 carbon atoms. The ink discharge head includes a nozzle to discharge the ink, a plurality of individual liquid chambers in communication with the nozzle, a flow-in channel to let the ink flow into the individual liquid chambers, and a flow-out channel to let the ink flow out from the individual liquid chambers. The negative pressure generator is configured to generate a negative pressure that lets the ink flow out from the individual liquid chambers.

公开(公告)号：US09623658B2

公开(公告)日：2017-04-18

申请号：US14988379

申请日：2016-01-05

申请人： Takahiro Yoshida

发明人： Takahiro Yoshida

IPC分类号： B41J2/055 ,  B41J2/175 ,  B41J2/14 ,  B41J2/16

CPC分类号： B41J2/1433 ,  B41J2/055 ,  B41J2/14274 ,  B41J2/1612 ,  B41J2/1623 ,  B41J2/1626 ,  B41J2/1632 ,  B41J2/175 ,  B41J2/17513 ,  B41J2002/14419

摘要： A liquid ejection head includes a nozzle plate, a channel plate, a common-liquid-chamber member, and a deformable damper area. The nozzle plate includes plural nozzles to eject droplets of liquid. The channel plate includes individual liquid chambers communicated with the nozzles. The common-liquid-chamber member includes a common liquid chamber to supply the liquid to the individual liquid chambers. The deformable damper area forms a wall face of the common liquid chamber. The channel plate has an end in a direction perpendicular to a nozzle array direction in which the nozzles are arrayed. The end is opposed to a portion of the damper area and has a relief at a side facing the damper area to permit deformation of the damper area.

公开(公告)号：US09340012B2

公开(公告)日：2016-05-17

申请号：US14165863

申请日：2014-01-28

申请人： Satomi Araki ,  Takahiro Yoshida

发明人： Satomi Araki ,  Takahiro Yoshida

IPC分类号： B41J2/045

CPC分类号： B41J2/04588 ,  B41J2/04553 ,  B41J2/04571 ,  B41J2/04581 ,  B41J2/04595 ,  B41J2/04596

摘要： An image forming apparatus includes: a liquid ejecting head including a nozzle that ejects a droplet and a pressure producing unit that produces pressure to pressurize a pressure chamber communicating with the nozzle; and a head drive controlling unit that provides a driving signal to the pressure producing unit. The head drive controlling unit outputs the driving signal including at least a first driving pulse and a second driving pulse to eject droplets and a residual vibration suppressing pulse to suppress residual vibration in the pressure chamber without ejecting a droplet. The residual vibration suppressing pulse is output at such a timing that the residual vibration suppressing pulse has an opposite phase to a composite vibration Vab that is formed by superposition of a meniscus vibration Va generated by droplet ejection with the first driving pulse and a meniscus vibration Vb generated by droplet ejection with the second driving pulse.

摘要翻译： 图像形成装置包括：液体喷射头，其包括喷射液滴的喷嘴和产生压力以对与喷嘴连通的压力室进行加压的压力产生单元; 以及头驱动控制单元，其向所述压力产生单元提供驱动信号。 头驱动控制单元输出包括至少第一驱动脉冲和第二驱动脉冲的驱动信号，以喷射液滴和残余振动抑制脉冲，以抑制压力室中的残余振动而不喷射液滴。 剩余振动抑制脉冲在与残留振动抑制脉冲与由第一驱动脉冲和液面振动Vb产生的弯液面振动Va叠加形成的复合振动Vab相反的时刻输出 由第二驱动脉冲的液滴喷射产生。