Patents by Inventor Zentaro Tamenaga
Zentaro Tamenaga 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: 20180154650Abstract: A liquid discharge head includes discharge orifices, recording elements that generate energy, supply channels that supply liquid to the recording elements, a common supply channel communicating with the supply channels, recovery channels that recover liquid supplied to the recording elements, a common recovery channel that recovers liquid from the recovery channels, a first inlet port that supplies liquid to the common supply channel, a first recovery port that recovers liquid from the first common supply channel, a second inlet port that supplies liquid to the common recovery channel, and a second recovery port that recovers liquid from the second common recovery channel. The first inlet port and the first recovery port communicate without going through channel portions where recording elements are disposed, and the second inlet port and the second recovery port communicate without going through channel portions where recording elements are disposed.Type: ApplicationFiled: February 5, 2018Publication date: June 7, 2018Inventors: Takatsuna Aoki, Seiichiro Karita, Shingo Okushima, Eisuke Nishitani, Yumi Komamiya, Kazuhiro Yamada, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Shuzo Iwanaga, Akio Saito, Akira Yamamoto
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Patent number: 9981464Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.Type: GrantFiled: December 16, 2016Date of Patent: May 29, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Yoshiyuki Nakagawa, Akira Yamamoto
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Patent number: 9975340Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration, viscosity and the like change. The invention provides a printing apparatus including: a page wide type liquid ejection head that includes an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein; a cap that covers the ejection opening; and a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber, wherein a circulation of the liquid is started after the cap is opened and the circulation of the liquid is stopped in a case where an image forming operation of ejecting the liquid from the ejection opening on the basis of a job is ended.Type: GrantFiled: December 16, 2016Date of Patent: May 22, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Akio Saito, Zentaro Tamenaga, Shingo Okushima, Yumi Komamiya, Tatsurou Mori, Takatsuna Aoki, Noriyasu Nagai, Akira Yamamoto
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Patent number: 9925792Abstract: A liquid discharge head includes discharge orifices, recording elements that generate energy, supply channels that supply liquid to the recording elements, a common supply channel communicating with the supply channels, recovery channels that recover liquid supplied to the recording elements, a common recovery channel that recovers liquid from the recovery channels, a first inlet port that supplies liquid to the common supply channel, a first recovery port that recovers liquid from the first common supply channel, a second inlet port that supplies liquid to the common recovery channel, and a second recovery port that recovers liquid from the second common recovery channel. The first inlet port and the first recovery port communicate without going through channel portions where recording elements are disposed, and the second inlet port and the second recovery port communicate without going through channel portions where recording elements are disposed.Type: GrantFiled: December 22, 2016Date of Patent: March 27, 2018Assignee: Canon Kabushiki KaishaInventors: Takatsuna Aoki, Seiichiro Karita, Shingo Okushima, Eisuke Nishitani, Yumi Komamiya, Kazuhiro Yamada, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Shuzo Iwanaga, Akio Saito, Akira Yamamoto
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Patent number: 9914308Abstract: A liquid ejection apparatus of the invention is a liquid ejection apparatus including a liquid storage container that stores liquid, a circulation mechanism that circulates liquid in a circulation path, and a liquid ejection head fluidly-connected to the liquid storage container, the liquid ejection head having a plurality of ejection openings, wherein the liquid ejection head includes at least a pair of common passages and a plurality of individual passages that connect one of the pair of common passages to the other one of the pair of common passages and communicate with the plurality of ejection openings, respectively, and at least a pair of pressure adjustment mechanisms whose pressures are set to different control pressures is connected to respective upstream sides or downstream sides of the pair of common passages.Type: GrantFiled: December 21, 2016Date of Patent: March 13, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Kazuhiro Yamada, Takatsuna Aoki, Seiichiro Karita, Shuzo Iwanaga, Akio Saito, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Akira Yamamoto
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Publication number: 20170341381Abstract: A liquid discharge device to perform recording by use of a liquid discharge head including discharge ports to discharge a liquid, pressure generation elements to generate energy to be used to discharge the liquid, and pressure chambers communicating with the discharge ports. The liquid discharge device includes: a control unit to control a temperature of the liquid discharge head by applying heat with heating elements arranged in divided areas of a region of the liquid discharge head where the discharge ports are arranged. When there is recording data for the discharge port in a certain one of the divided areas, the control unit causes the heating element in the divided area to generate heat, and when there is no recording data for the discharge port in the certain divided area, the control unit keeps the heating element in the certain divided area from generating heat.Type: ApplicationFiled: May 17, 2017Publication date: November 30, 2017Inventors: Takatsuna Aoki, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Shingo Okushima, Zentaro Tamenaga, Akira Yamamoto, Tatsurou Mori, Noriyasu Nagai, Akio Saito, Ryo Kasai
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Publication number: 20170341398Abstract: In order that the interior of a cap member, in a case where the cap member abuts to a cover member, is allowed to have improved airtightness so that the cap member can sufficiently function, a sealing member is used to seal between the cover member and first and second flow path members for retaining the cover member.Type: ApplicationFiled: May 18, 2017Publication date: November 30, 2017Inventors: Zentaro Tamenaga, Shuzo Iwanaga, Shingo Okushima
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Publication number: 20170341406Abstract: A liquid ejecting apparatus has a liquid ejecting unit and a negative pressure regulating unit provided between passages connecting the tank to the liquid ejecting unit, regulates fluid pressure of liquid flowing into the liquid ejecting unit. The negative pressure regulating unit includes a negative pressure chamber whose internal pressure is regulated within a predetermined range, and a discharging passage for discharging liquid stored in the negative pressure chamber from the negative pressure regulating unit. The discharging passage has an outlet disposed in an upper portion of the negative pressure chamber in a direction of gravity, a bubble accumulation portion connected to the outlet and having a space above the outlet in the direction of gravity, and a passage guiding liquid flowing from the outlet to a discharging port opened in a bottom of the negative pressure regulating unit.Type: ApplicationFiled: May 1, 2017Publication date: November 30, 2017Inventors: Kazuhiro Yamada, Shuzo Iwanaga, Seiichiro Karita, Shingo Okushima, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Akio Saito, Takatsuna Aoki, Akira Yamamoto
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Publication number: 20170334191Abstract: A liquid ejection head includes a support member extending in a first direction, a print element board having an ejection port through which liquid is ejected, and first and second members arranged in the support member adjacent to each other along the first direction, each having a supply path extending in the first direction. The print element board element generates energy used for ejection of the supply paths supplied liquid. The first member includes an outlet port through which the supplied liquid flows out. The second member includes an inlet port through which the liquid from the outlet port flows. The outlet port is provided near a first member supply path end portion on the support member side on which the second member is provided. The inlet port is provided near a second member supply path end portion on the support member side on which the first member is provided.Type: ApplicationFiled: May 9, 2017Publication date: November 23, 2017Inventors: Tatsurou Mori, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Akio Saito, Zentaro Tamenaga, Shingo Okushima, Yumi Komamiya, Noriyasu Nagai, Takatsuna Aoki, Akira Yamamoto
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Publication number: 20170274647Abstract: In order to keep possible local temperature differences in a liquid ejection head small to allow stable liquid ejection performance to be achieved, temperatures in a plurality of heating areas in a liquid ejection head are discretely controlled using heating elements and temperature detection elements.Type: ApplicationFiled: March 15, 2017Publication date: September 28, 2017Inventors: Takatsuna Aoki, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Shingo Okushima, Zentaro Tamenaga, Akira Yamamoto, Tatsurou Mori, Noriyasu Nagai, Akio Saito, Masashi Hayashi, Takeshi Murase, Yuki Sawai
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Patent number: 9744760Abstract: Provided is a liquid ejection head including: a plurality of recording element substrates including energy generating elements that generate ejection energy for ejecting liquid from ejection orifices; a first support member that supports the plurality of recording element substrates such that the recording element substrates are arranged in one or more lines on a main surface of the first support member; and a second support member that supports the first support member on a surface opposite to the main surface. A first thermal resistance concerning an in-plane direction parallel to the main surface, of a region between the recording element substrates in the first support member is higher than a second thermal resistance concerning a thickness direction of the second support member, of a projection region that overlaps with each recording element substrate in the second support member.Type: GrantFiled: February 6, 2015Date of Patent: August 29, 2017Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Yamada, Takuto Moriguchi, Zentaro Tamenaga, Shuzo Iwanaga, Takatsugu Moriya
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Publication number: 20170239956Abstract: The liquid ejection apparatus includes a circulation unit configured to circulate a liquid along a circulation passage extending from a liquid supply source to the liquid supply source through a liquid ejection head. Further, the liquid ejection apparatus includes a deaeration unit configured to perform a deaeration operation of decreasing a dissolved gas amount of the liquid, a recovery unit configured to recover ejection performance of an ejection opening, and a control unit configured to control an operation of driving the circulation unit and the deaeration unit. The control unit starts the deaeration operation and circulates the liquid having been deaerated by the deaeration operation inside a circulation path after the recovery operation and before an initial printing operation after the recovery operation.Type: ApplicationFiled: February 17, 2017Publication date: August 24, 2017Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Akio Saito, Akira Yamamoto, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori
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Publication number: 20170197431Abstract: A liquid ejection apparatus using a liquid ejection head and ejecting a liquid from the liquid ejection head includes a liquid supply unit that has a supply passage of the liquid supplied to the liquid ejection head and a collection passage of the liquid collected from the liquid ejection head, and supplies and collects the liquid by generating a difference between a pressure of the liquid in the supply passage and a pressure of the liquid in the collection passage, and a flow resistance adjustment unit provided in the supply passage and/or the collection passage.Type: ApplicationFiled: December 16, 2016Publication date: July 13, 2017Inventors: Kazuhiro Yamada, Shuzo Iwanaga, Seiichiro Karita, Takatsuna Aoki, Shingo Okushima, Akira Yamamoto, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Akio Saito
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Publication number: 20170197434Abstract: A liquid discharge head includes discharge orifices, recording elements that generate energy, supply channels that supply liquid to the recording elements, a common supply channel communicating with the supply channels, recovery channels that recover liquid supplied to the recording elements, a common recovery channel that recovers liquid from the recovery channels, a first inlet port that supplies liquid to the common supply channel, a first recovery port that recovers liquid from the first common supply channel, a second inlet port that supplies liquid to the common recovery channel, and a second recovery port that recovers liquid from the second common recovery channel. The first inlet port and the first recovery port communicate without going through channel portions where recording elements are disposed, and the second inlet port and the second recovery port communicate without going through channel portions where recording elements are disposed.Type: ApplicationFiled: December 22, 2016Publication date: July 13, 2017Inventors: Takatsuna Aoki, Seiichiro Karita, Shingo Okushima, Eisuke Nishitani, Yumi Komamiya, Kazuhiro Yamada, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori, Shuzo Iwanaga, Akio Saito, Akira Yamamoto
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Publication number: 20170197439Abstract: A liquid ejection head capable of suppressing a change in pressure of a pressure chamber, a liquid ejection apparatus, and a manufacturing method are provided. For that reason, a lid member is formed on a wafer-shaped element board and the element board is cut into chips to manufacture a print element board.Type: ApplicationFiled: December 22, 2016Publication date: July 13, 2017Inventors: Shingo Okushima, Takatsuna Aoki, Seiichiro Karita, Noriyasu Nagai, Tamaki Sato, Tetsushi Ishikawa, Yasuaki Tominaga, Manabu Otsuka, Shuzo Iwanaga, Tatsurou Mori, Kazuhiro Yamada, Akira Yamamoto, Zentaro Tamenaga, Akio Saito
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Publication number: 20170197432Abstract: A liquid ejection apparatus of the invention is a liquid ejection apparatus including a liquid storage container that stores liquid, a circulation mechanism that circulates liquid in a circulation path, and a liquid ejection head fluidly-connected to the liquid storage container, the liquid ejection head having a plurality of ejection openings, wherein the liquid ejection head includes at least a pair of common passages and a plurality of individual passages that connect one of the pair of common passages to the other one of the pair of common passages and communicate with the plurality of ejection openings, respectively, and at least a pair of pressure adjustment mechanisms whose pressures are set to different control pressures is connected to respective upstream sides or downstream sides of the pair of common passages.Type: ApplicationFiled: December 21, 2016Publication date: July 13, 2017Inventors: Kazuhiro Yamada, Takatsuna Aoki, Seiichiro Karita, Shuzo Iwanaga, Akio Saito, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Akira Yamamoto
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Publication number: 20170197407Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.Type: ApplicationFiled: December 16, 2016Publication date: July 13, 2017Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Zentaro Tamenaga, Yumi Komamiya, Noriyasu Nagai, Tatsurou Mori, Yoshiyuki Nakagawa, Akira Yamamoto
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Publication number: 20170197426Abstract: A liquid ejection printing apparatus includes a pressure control assembly that generates a pressure for causing the same liquid to flow to the ejection opening communication passage communicating with an ejection opening of a liquid ejection head. The pressure control assembly includes a first pressure adjustment mechanism that causes a liquid supplied from a first upstream passage to flow therefrom at a first pressure and a second pressure adjustment mechanism that causes a liquid supplied from a second upstream passage therefrom at a second pressure different from the first pressure. The first upstream passage and the second upstream passage communicate with each other and a first downstream passage communicating with the first pressure adjustment mechanism and a second downstream passage communicating with the second pressure adjustment mechanism are respectively connected to the same ejection opening communication passage communicating with the ejection opening.Type: ApplicationFiled: December 15, 2016Publication date: July 13, 2017Inventors: Noriyasu Nagai, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Akira Yamamoto, Takatsuna Aoki, Shingo Okushima, Akio Saito, Zentaro Tamenaga, Tatsurou Mori
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Publication number: 20170197417Abstract: In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration, viscosity and the like change. The invention provides a printing apparatus including: a page wide type liquid ejection head that includes an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein; a cap that covers the ejection opening; and a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber, wherein a circulation of the liquid is started after the cap is opened and the circulation of the liquid is stopped in a case where an image forming operation of ejecting the liquid from the ejection opening on the basis of a job is ended.Type: ApplicationFiled: December 16, 2016Publication date: July 13, 2017Inventors: Seiichiro Karita, Shuzo Iwanaga, Kazuhiro Yamada, Akio Saito, Zentaro Tamenaga, Shingo Okushima, Yumi Komamiya, Tatsurou Mori, Takatsuna Aoki, Noriyasu Nagai, Akira Yamamoto
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Publication number: 20170197435Abstract: A liquid discharge head includes: a plurality of recording element boards each having a plurality each of discharge orifices configured to discharge liquid, liquid supply channels configured to supply liquid to the discharge orifices, and liquid recovery channels configured to recover liquid supplied from the liquid supply channels; a common supply channel communicating with at least one liquid supply channel of the recording element boards and configured to supply liquid to the plurality of recording element boards; and a common recovery channel communicating with at least one liquid recovery channel of the recording element boards and configured to recover liquid from the plurality of recording element boards.Type: ApplicationFiled: December 22, 2016Publication date: July 13, 2017Inventors: Akira Yamamoto, Shuzo Iwanaga, Seiichiro Karita, Kazuhiro Yamada, Takatsuna Aoki, Shingo Okushima, Akio Saito, Zentaro Tamenaga, Noriyasu Nagai, Tatsurou Mori