Patents by Inventor Toru Nakakubo
Toru Nakakubo 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: 20240109326Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.Type: ApplicationFiled: December 8, 2023Publication date: April 4, 2024Inventors: Kazuhiro Yamada, Yoshiyuki Nakagawa, Toru Nakakubo, Ryo Kasai, Takuro Yamazaki
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Publication number: 20240034061Abstract: A liquid ejection head includes ejection orifices for ejecting liquid, common liquid chambers connected to the ejection orifices, common flow passages, and pitch conversion flow passages that connects the common flow passages and liquid chambers to each other. The pitch conversion flow passages includes a periphery formed with resin. In a case where a number of pitch conversion flow passages in a group is minimum on a condition that one or more of the pitch conversion flow passages are respectively included in the group, the pitch conversion flow passages have a repeating pattern in which the group is repeatedly arranged. At least one of two pitch conversion flow passages adjoining an m-th pitch conversion flow passage (m is all integers from 1 to n?2, where n is an integer of 3 or more) is one of first to (m+1)-th pitch conversion flow passages.Type: ApplicationFiled: October 11, 2023Publication date: February 1, 2024Inventors: Naoko Shimizu, Toru Nakakubo, Kazuhiro Yamada, Atsushi Teranishi, Osamu Kanome
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Patent number: 11850855Abstract: A liquid ejection head includes ejection orifices for ejecting liquid, common liquid chambers connected to the ejection orifices, common flow passages, and pitch conversion flow passages that connects the common flow passages and liquid chambers to each other. The pitch conversion flow passages includes a periphery formed with resin. In a case where a number of pitch conversion flow passages in a group is minimum on a condition that one or more of the pitch conversion flow passages are respectively included in the group, the pitch conversion flow passages have a repeating pattern in which the group is repeatedly arranged. At least one of two pitch conversion flow passages adjoining an m-th pitch conversion flow passage (m is all integers from 1 to n?2, where n is an integer of 3 or more) is one of first to (m+1)-th pitch conversion flow passages.Type: GrantFiled: November 30, 2021Date of Patent: December 26, 2023Assignee: Canon Kabushiki KaishaInventors: Naoko Shimizu, Toru Nakakubo, Kazuhiro Yamada, Atsushi Teranishi, Osamu Kanome
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Patent number: 11813864Abstract: A liquid ejection head includes ejection orifices for ejecting liquid, common liquid chambers connected to the ejection orifices, common flow passages, and pitch conversion flow passages that connects the common flow passages and liquid chambers to each other. The pitch conversion flow passages includes a periphery formed with resin. In a case where a number of pitch conversion flow passages in a group is minimum on a condition that one or more of the pitch conversion flow passages are respectively included in the group, the pitch conversion flow passages have a repeating pattern in which the group is repeatedly arranged. At least one of two pitch conversion flow passages adjoining an m-th pitch conversion flow passage (m is all integers from 1 to n?2, where n is an integer of 3 or more) is one of first to (m+1)-th pitch conversion flow passages.Type: GrantFiled: November 30, 2021Date of Patent: November 14, 2023Assignee: Canon Kabushiki KaishaInventors: Naoko Shimizu, Toru Nakakubo, Kazuhiro Yamada, Atsushi Teranishi, Osamu Kanome
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Publication number: 20230264478Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.Type: ApplicationFiled: May 2, 2023Publication date: August 24, 2023Inventors: Kazuhiro Yamada, Yoshiyuki Nakagawa, Toru Nakakubo, Ryo Kasai, Takuro Yamazaki
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Patent number: 11673396Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.Type: GrantFiled: June 29, 2021Date of Patent: June 13, 2023Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Yamada, Yoshiyuki Nakagawa, Toru Nakakubo, Ryo Kasai, Takuro Yamazaki
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Publication number: 20230150260Abstract: A liquid ejection apparatus includes: an ejection unit that ejects from an ejection port a liquid in a pressure chamber communicating with the ejection port; a first flow channel that allows for communication between the pressure chamber and a liquid supply unit; a second flow channel communicating with the pressure chamber; a liquid transportation chamber communicating with a connection flow channel communicating with the first flow channel and the second flow channel; a liquid transportation unit that flows the liquid in the liquid transportation chamber in a predetermined direction by expanding and contracting the liquid transportation chamber with application of a driving voltage including a step-up waveform and a step-down waveform; and a control unit that performs control such that a liquid ejection timing does not coincide with a voltage application period in which one of the step-up and step-down waveforms that has a greater voltage change rate is applied.Type: ApplicationFiled: November 10, 2022Publication date: May 18, 2023Inventors: Rei Kurashima, Toru Nakakubo, Hiroyuki Ozaki
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Patent number: 11607882Abstract: A liquid ejection module includes a pressure chamber, a supply flow channel that supplies a liquid to the pressure chamber, a collection flow channel that collects the liquid from the pressure chamber, a liquid feeding chamber connected to one of the supply flow channel and the collection flow channel, and a connection flow channel connecting the liquid feeding chamber to the other of the supply flow channel and the collection flow channel. The liquid feeding chamber includes a liquid feeding mechanism that circulates the liquid in the supply flow channel, the pressure chamber, the collection flow channel, the liquid feeding chamber, and the connection flow channel. A ratio of a sum of flow channel resistance of the supply flow channel, the pressure chamber, and the collection flow channel relative to flow channel resistance of the connection flow channel is equal to or above 0.5.Type: GrantFiled: July 20, 2021Date of Patent: March 21, 2023Assignee: Canon Kabushiki KaishaInventors: Toru Nakakubo, Akihisa Iio, Rei Kurashima, Takahiro Akiyama, Hiroyuki Ozaki
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Patent number: 11602934Abstract: A liquid ejection head, a liquid ejection apparatus, and a liquid ejection method are capable of sufficiently suppressing the thickening of a liquid in an ejection orifice. The liquid ejection head includes a pressure chamber, a channel in which a liquid is caused to flow through the pressure chamber, an ejection orifice communicating with the pressure chamber, and an ejection energy generation element configured to eject the liquid in the pressure chamber from the ejection orifice. A meniscus of the liquid is formed at an end portion of the ejection orifice communicating with the pressure chamber.Type: GrantFiled: December 18, 2019Date of Patent: March 14, 2023Assignee: Canon Kabushiki KaishaInventors: Yoshiyuki Nakagawa, Kazuhiro Yamada, Takuro Yamazaki, Toru Nakakubo, Ryo Kasai
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Patent number: 11465415Abstract: In a case where air bubbles exist in ink at the time of circulating the ink within a liquid ejection module, the amount circulating ink runs short and stability of ejection is blocked. The liquid ejection module has: a pressure chamber that communicates with an ejection port and which stores a liquid; an energy generation element that produces energy for causing a liquid to be ejected from the ejection port; a supply flow path that supplies a liquid to the pressure chamber; a collecting channel that collects a liquid from the pressure chamber; a liquid sending chamber that connects to the collecting channel; a connection flow path that connects the liquid sending chamber and the supply flow path; and a liquid sending unit configured to circulate a liquid, and the liquid sending chamber has a continuously inclined structure.Type: GrantFiled: June 15, 2021Date of Patent: October 11, 2022Assignee: Canon Kabushiki KaishaInventors: Rei Kurashima, Hiroyuki Ozaki, Toru Nakakubo
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Patent number: 11453213Abstract: A driving method enables a liquid feeding apparatus using a driving element in the form of a membrane to feed a liquid at high liquid feeding accuracy. To this end, a voltage applied to the driving element is controlled in such a way as to repeat a first period in which the voltage is changed from a first voltage to a second voltage and a second period which is a longer period than the first period and in which the voltage is changed from the second voltage to the first voltage, and such that an inflection point is provided in each predetermined interval during the first period based on a Helmholtz vibration period unique to the liquid feeding apparatus.Type: GrantFiled: December 26, 2019Date of Patent: September 27, 2022Assignee: Canon Kabushiki KaishaInventors: Rei Kurashima, Akihisa Iio, Takahiro Akiyama, Toru Nakakubo, Noriyuki Kaifu
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Publication number: 20220297442Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.Type: ApplicationFiled: June 8, 2022Publication date: September 22, 2022Inventors: Kazuhiro Yamada, Toru Nakakubo, Yoshiykuki Nakagawa, Shingo Okushima
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Patent number: 11433667Abstract: A recording element substrate is bonded to an FPC in at least a part of a region of a second face between a liquid supply port and an edge of the recording element substrate, and an electric connection part is provided in which a wiring conductor and a pad are electrically connected to each other by a bonding wire.Type: GrantFiled: April 9, 2020Date of Patent: September 6, 2022Assignee: Canon Kabushiki KaishaInventors: Tomohiro Takahashi, Toru Nakakubo, Akio Saito, Takeyori Sato, Katsumi Eda, Takeshi Shibata
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Patent number: 11376863Abstract: A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.Type: GrantFiled: April 24, 2020Date of Patent: July 5, 2022Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Yamada, Toru Nakakubo, Yoshiyuki Nakagawa, Shingo Okushima
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Publication number: 20220176700Abstract: A liquid ejection head includes ejection orifices for ejecting liquid, common liquid chambers connected to the ejection orifices, common flow passages, and pitch conversion flow passages that connects the common flow passages and liquid chambers to each other. The pitch conversion flow passages includes a periphery formed with resin. In a case where a number of pitch conversion flow passages in a group is minimum on a condition that one or more of the pitch conversion flow passages are respectively included in the group, the pitch conversion flow passages have a repeating pattern in which the group is repeatedly arranged. At least one of two pitch conversion flow passages adjoining an m-th pitch conversion flow passage (m is all integers from 1 to n?2, where n is an integer of 3 or more) is one of first to (m+1)-th pitch conversion flow passages.Type: ApplicationFiled: November 30, 2021Publication date: June 9, 2022Inventors: Naoko Shimizu, Toru Nakakubo, Kazuhiro Yamada, Atsushi Teranishi, Osamu Kanome
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Publication number: 20210394515Abstract: In a case where air bubbles exist in ink at the time of circulating the ink within a liquid ejection module, the amount circulating ink runs short and stability of ejection is blocked. The liquid ejection module has: a pressure chamber that communicates with an ejection port and which stores a liquid; an energy generation element that produces energy for causing a liquid to be ejected from the ejection port; a supply flow path that supplies a liquid to the pressure chamber; a collecting channel that collects a liquid from the pressure chamber; a liquid sending chamber that connects to the collecting channel; a connection flow path that connects the liquid sending chamber and the supply flow path; and a liquid sending unit configured to circulate a liquid, and the liquid sending chamber has a continuously inclined structure.Type: ApplicationFiled: June 15, 2021Publication date: December 23, 2021Inventors: Rei Kurashima, Hiroyuki Ozaki, Toru Nakakubo
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Patent number: 11179932Abstract: A liquid ejection head including a recording element substrate that ejects a liquid, a flow passage member provided with a flow passage that supplies the liquid to the recording element substrate, an elastic member having elasticity disposed between the recording element substrate and the flow passage member, and a fixing member that fixes the recording element substrate and the flow passage member. In the liquid ejection head, an area between the recording element substrate and the flow passage member through which the liquid flows is sealed by having the elastic member be deformed with the fixing member.Type: GrantFiled: November 4, 2019Date of Patent: November 23, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Akio Saito, Toru Nakakubo, Yohei Nakamura, Zentaro Tamenaga
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Publication number: 20210347172Abstract: A liquid ejection module includes a pressure chamber, a supply flow channel that supplies a liquid to the pressure chamber, a collection flow channel that collects the liquid from the pressure chamber, a liquid feeding chamber connected to one of the supply flow channel and the collection flow channel, and a connection flow channel connecting the liquid feeding chamber to the other of the supply flow channel and the collection flow channel. The liquid feeding chamber includes a liquid feeding mechanism that circulates the liquid in the supply flow channel, the pressure chamber, the collection flow channel, the liquid feeding chamber, and the connection flow channel. A ratio of a sum of flow channel resistance of the supply flow channel, the pressure chamber, and the collection flow channel relative to flow channel resistance of the connection flow channel is equal to or above 0.5.Type: ApplicationFiled: July 20, 2021Publication date: November 11, 2021Inventors: Toru Nakakubo, Akihisa Iio, Rei Kurashima, Takahiro Akiyama, Hiroyuki Ozaki
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Patent number: 11161351Abstract: A liquid ejection head is provided with a recording element substrate, and the recording element substrate includes an ejection port member, an electric wiring layer including a pressure generating element array and electric connection portions, and a silicon substrate including the ejection port member and the electric wiring layer on a front surface. The silicon substrate includes a first through hole and a second through hole that protrude the electric connection portions. The rear surface of the silicon substrate is a (100) surface. An extension line of a side extending along the [110] direction, out of sides of the opening of the first trough hole and an extension line of a side extending along the [110] direction, out of sides of the opening of the second through hole are displaced from each other in a direction orthogonal to the [110] direction.Type: GrantFiled: September 17, 2019Date of Patent: November 2, 2021Assignee: Canon Kabushiki KaishaInventors: Masataka Kato, Takuya Hatsui, Souta Takeuchi, Masaya Uyama, Toru Nakakubo, Tomohiro Takahashi
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Publication number: 20210323310Abstract: A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.Type: ApplicationFiled: June 29, 2021Publication date: October 21, 2021Inventors: Kazuhiro Yamada, Yoshiyuki Nakagawa, Toru Nakakubo, Ryo Kasai, Takuro Yamazaki