Patents by Inventor Tomohiko Kohda
Tomohiko Kohda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230330999Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: ApplicationFiled: June 21, 2023Publication date: October 19, 2023Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 11724514Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: GrantFiled: April 26, 2022Date of Patent: August 15, 2023Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Patent number: 11420447Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: GrantFiled: May 22, 2020Date of Patent: August 23, 2022Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Publication number: 20220250392Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: ApplicationFiled: April 26, 2022Publication date: August 11, 2022Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 11331930Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: GrantFiled: February 24, 2021Date of Patent: May 17, 2022Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Publication number: 20210178776Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: ApplicationFiled: February 24, 2021Publication date: June 17, 2021Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 10786996Abstract: A liquid discharge head includes a channel section, and a driving section. The channel section supplies a liquid to a plurality of nozzles to discharge the liquid. The driving section causes the nozzles to discharge the liquid. The channel section includes an individual chamber to supply the liquid to the nozzles and a common chamber to supply the liquid to the individual chamber. A laminated portion of each of a plurality of plate-shaped components which are constituent components of the individual chamber does not have a cut-out portion in a portion corresponding to a bonding position of a damper member disposed between the individual chamber and the common chamber.Type: GrantFiled: March 15, 2019Date of Patent: September 29, 2020Assignee: Ricoh Company, Ltd.Inventor: Tomohiko Kohda
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Publication number: 20200282740Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: ApplicationFiled: May 22, 2020Publication date: September 10, 2020Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 10730292Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.Type: GrantFiled: June 15, 2018Date of Patent: August 4, 2020Assignee: RICOH COMPANY, LTD.Inventors: Tomohiko Kohda, Satoru Tobita, Ryo Kasahara, Ryohta Matsufuji, Norimasa Sohgawa
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Patent number: 10696057Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: GrantFiled: November 26, 2019Date of Patent: June 30, 2020Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Patent number: 10668726Abstract: A liquid ejection head is provided. The liquid ejection head includes at least two nozzle lines configured to have a plurality of nozzles for ejecting liquid disposed in respective lines, a plurality of individual liquid chambers configured to be in communication with corresponding nozzles of the nozzle lines, and at least two circulation channels corresponding to the nozzle lines, configured to be in communication with the individual liquid chambers. The at least two circulation channels are in communication with each other through a bridging channel disposed in a direction intersecting with the nozzle line direction, and the bridging channel and the circulation channels are disposed at different positions in a thickness direction of a member which forms the bridging channel and the circulation channels.Type: GrantFiled: May 16, 2018Date of Patent: June 2, 2020Assignee: RICOH COMPANY, LTD.Inventors: Takahiro Yoshida, Tomohiko Kohda, Takeshi Shimizu, Kanshi Abe, Ryo Kasahara, Takayuki Nakai, Shiomi Andou
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Publication number: 20200094573Abstract: A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.Type: ApplicationFiled: November 26, 2019Publication date: March 26, 2020Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 10538101Abstract: 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.Type: GrantFiled: November 15, 2018Date of Patent: January 21, 2020Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Publication number: 20190283436Abstract: A liquid discharge head includes a channel section, and a driving section. The channel section supplies a liquid to a plurality of nozzles to discharge the liquid. The driving section causes the nozzles to discharge the liquid. The channel section includes an individual chamber to supply the liquid to the nozzles and a common chamber to supply the liquid to the individual chamber. A laminated portion of each of a plurality of plate-shaped components which are constituent components of the individual chamber does not have a cut-out portion in a portion corresponding to a bonding position of a damper member disposed between the individual chamber and the common chamber.Type: ApplicationFiled: March 15, 2019Publication date: September 19, 2019Inventor: Tomohiko Kohda
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Publication number: 20190084313Abstract: 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.Type: ApplicationFiled: November 15, 2018Publication date: March 21, 2019Applicant: Ricoh Company, Ltd.Inventors: Tomohiko KOHDA, Takahiro YOSHIDA, Shiomi ANDOU, Takayuki NAKAI, Kanshi ABE, Takeshi SHIMIZU, Ryo KASAHARA
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Patent number: 10160226Abstract: 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.Type: GrantFiled: June 30, 2017Date of Patent: December 25, 2018Assignee: Ricoh Company, Ltd.Inventors: Tomohiko Kohda, Takahiro Yoshida, Shiomi Andou, Takayuki Nakai, Kanshi Abe, Takeshi Shimizu, Ryo Kasahara
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Publication number: 20180290446Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual. liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.Type: ApplicationFiled: June 15, 2018Publication date: October 11, 2018Applicant: RICOH COMPANY, LTD.Inventors: Tomohiko KOHDA, Satoru TOBITA, Ryo KASAHARA, Ryohta MATSUFUJI, Norimasa SOHGAWA
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Publication number: 20180257374Abstract: A liquid ejection head is provided. The liquid ejection head includes at least two nozzle lines configured to have a plurality of nozzles for ejecting liquid disposed in respective lines, a plurality of individual liquid chambers configured to be in communication with corresponding nozzles of the nozzle lines, and at least two circulation channels corresponding to the nozzle lines, configured to be in communication with the individual liquid chambers. The at least two circulation channels are in communication with each other through a bridging channel disposed in a direction intersecting with the nozzle line direction, and the bridging channel and the circulation channels are disposed at different positions in a thickness direction of a member which forms the bridging channel and the circulation channels.Type: ApplicationFiled: May 16, 2018Publication date: September 13, 2018Applicant: RICOH COMPANY, LTD.Inventors: Takahiro YOSHIDA, Tomohiko KOHDA, Takeshi SHIMIZU, Kanshi ABE, Ryo KASAHARA, Takayuki NAKAI, Shiomi ANDOU
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Patent number: 10022963Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.Type: GrantFiled: November 1, 2016Date of Patent: July 17, 2018Assignee: RICOH COMPANY, LTD.Inventors: Tomohiko Kohda, Satoru Tobita, Ryo Kasahara, Ryohta Matsufuji, Norimasa Sohgawa
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Patent number: 10005281Abstract: A liquid ejection head is provided. The liquid ejection head includes at least two nozzle lines configured to have a plurality of nozzles for ejecting liquid disposed in respective lines, a plurality of individual liquid chambers configured to be in communication with corresponding nozzles of the nozzle lines, and at least two circulation channels corresponding to the nozzle lines, configured to be in communication with the individual liquid chambers. The at least two circulation channels are in communication with each other through a bridging channel disposed in a direction intersecting with the nozzle line direction, and the bridging channel and the circulation channels are disposed at different positions in a thickness direction of a member which forms the bridging channel and the circulation channels.Type: GrantFiled: December 21, 2015Date of Patent: June 26, 2018Assignee: RICOH COMPANY, LTD.Inventors: Takahiro Yoshida, Tomohiko Kohda, Takeshi Shimizu, Kanshi Abe, Ryo Kasahara, Takayuki Nakai, Shiomi Andou