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公开(公告)号：US20240109326A1
公开(公告)日：2024-04-04
申请号：US18533488
申请日：2023-12-08
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yoshiyuki Nakagawa , Toru Nakakubo , Ryo Kasai , Takuro Yamazaki
CPC classification number: B41J2/175 , B41J2/14233 , B41J2/1631
Abstract: 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.
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公开(公告)号：US11597212B2
公开(公告)日：2023-03-07
申请号：US17346158
申请日：2021-06-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yohei Nakamura
Abstract: A liquid ejection apparatus includes a liquid storing unit capable of storing liquid, a liquid ejection unit including an ejection port that is capable of ejecting the liquid, and a pressure control unit that receives the liquid from the liquid storing unit and allows the liquid having a pressure controlled to be within a predetermined pressure range to be supplied to the liquid ejection unit. Additionally, the liquid ejection apparatus includes a first circulation unit that supplies the liquid having the pressure controlled by the pressure control unit to the ejection port while circulating the liquid between the liquid ejection unit and the pressure control unit, and a second circulation unit that circulates the liquid between the liquid storing unit and the pressure control unit.
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公开(公告)号：US20220194089A1
公开(公告)日：2022-06-23
申请号：US17549664
申请日：2021-12-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yohei Nakamura , Kazuhiro Yamada
IPC: B41J2/175
Abstract: A liquid ejection apparatus comprising: two flow passages for supplying or recovering a liquid to an element substrate for ejecting the liquid; a circulation supply flow passage for supplying liquid to oneflow passage, a circulation recovery flow passage for recovering liquid from the other flow passage, and a plurality of on-off valve mechanisms for controlling communication and shutoff between the respective flow passages; the on-off valve mechanism comprises an opening located between flow passages, a sealing portion capable of on-off the opening, an urging member for urging the sealing portion in a direction to approach or away from the opening, and a movement mechanism for moving the sealing portion against the urging force of the urging member, the liquid discharge device controls opening and closing of at least two on-off valve mechanisms by moving the scaling parts of at least two on-off valve mechanisms together by the movement mechanism.
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公开(公告)号：US11001071B2
公开(公告)日：2021-05-11
申请号：US16672074
申请日：2019-11-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takashi Sugawara , Masafumi Morisue , Yoshiyuki Nakagawa , Kazuhiro Yamada , Takuro Yamazaki , Ryo Kasai , Tomoko Kudo
Abstract: A liquid ejection head includes a pair of electrodes disposed on a first surface of a substrate forming part of a flow path for a liquid. The electrodes of the pair of electrodes are adjacent to each other in a transverse direction of the electrodes, and the liquid moves in the transverse direction upon application of a voltage across the electrodes. The electrodes each include a ridge portion disposed on the first surface and an electrode wiring line connected to a power source for applying the voltage. The electrode wiring line covers an upper surface of the ridge portion and side surfaces of the ridge portion and extends from parts covering the side surfaces of the ridge portion to a downstream side and an upstream side with respect to a direction in which the liquid moves, so as to cover the first surface.
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公开(公告)号：US20200290363A1
公开(公告)日：2020-09-17
申请号：US16812218
申请日：2020-03-06
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yohei Nakamura , Kazuhiro Yamada
Abstract: A liquid ejection apparatus includes a plurality of liquid ejection units ejecting different types of liquids. Each liquid ejection unit includes an ejection orifice which ejects a liquid, first and second liquid tanks which store the liquid, and a liquid flow path which connects the first liquid tank and the second liquid tank to each other across the ejection orifice. The liquid ejection apparatus further includes a cap member which covers of the ejection orifices of the plurality of liquid ejection units and forms a space sealed between the ejection orifices of the plurality of liquid ejection units and the cap member, and a pressure control mechanism which simultaneously pressurizes the first and second liquid tanks.
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Patent Agency Ranking
公开(公告)号：US10717273B2
公开(公告)日：2020-07-21
申请号：US16141055
申请日：2018-09-25
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiyuki Nakagawa , Kazuhiro Yamada , Noriyasu Nagai , Takuro Yamazaki , Toru Nakakubo , Akira Yamamoto , Masafumi Morisue , Ryo Kasai
Abstract: A liquid ejection head includes an ejection orifice through which a liquid is ejected, a first liquid flow path which is in communication with the ejection orifice and through which the liquid flows, a second liquid flow path which is in communication with the ejection orifice on the opposite side of the first liquid flow path with respect to the ejection orifice 12 and through which the liquid flows, a first electrode positioned in the first liquid flow path 13, and a second electrode which is positioned in the second liquid flow path and generates an electro-osmotic flow in the liquid together with the first electrode.
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公开(公告)号：US10703105B2
公开(公告)日：2020-07-07
申请号：US16140896
申请日：2018-09-25
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiyuki Nakagawa , Kazuhiro Yamada , Noriyasu Nagai , Takuro Yamazaki , Toru Nakakubo , Akira Yamamoto , Masafumi Morisue , Ryo Kasai
Abstract: A liquid ejection head is provided with an ejection orifice array having multiple ejection orifices in order to eject a liquid; multiple energy-generating elements for generating energy in order to eject the liquid; a substrate provided with the energy-generating elements; a through-port array having multiple through-ports penetrating the substrate; multiple linear liquid flow paths positioned between the through-port array and the ejection orifice array and connected to respective ejection orifices of the ejection orifice array and respective through-ports of the through-port array; and first and second electrodes arranged in each of the multiple liquid flow paths for generating an electroosmotic flow in the liquid.
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公开(公告)号：US10703100B2
公开(公告)日：2020-07-07
申请号：US16135111
申请日：2018-09-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Masafumi Morisue , Yoshiyuki Nakagawa , Kazuhiro Yamada , Takuro Yamazaki , Ryo Kasai , Tomoko Kudo , Takashi Sugawara
Abstract: Provided is a liquid ejection head including: a substrate; an energy-generating element, which is arranged on the substrate, and is used for ejecting a liquid; a flow path forming member, which has an ejection orifice for ejecting the liquid, and is configured to form a flow path of the liquid between the flow path forming member and the substrate; an electrode configured to generate a flow of the liquid; and a wiring, which is arranged so as to be brought into contact with the flow path forming member, and is configured to supply electric power to the electrode, in which the flow path forming member contains an organic material, and in which the electrode and the wiring are each formed of a conductive adhesive layer containing at least one of conductive diamond-like carbon or tin-doped indium oxide.
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公开(公告)号：US10668736B2
公开(公告)日：2020-06-02
申请号：US15976470
申请日：2018-05-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Toru Nakakubo , Yoshiyuki Nakagawa , Shingo Okushima
Abstract: 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.
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公开(公告)号：US10583662B2
公开(公告)日：2020-03-10
申请号：US16139999
申请日：2018-09-24
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yohei Nakamura , Yoshiyuki Nakagawa , Naozumi Nabeshima
Abstract: Ink is supplied to a print head through a pressure compensation mechanism and a common collection flow path in a case where a predetermined differential pressure or higher between a pressure in a common supply flow path of the print head and a pressure in a common collection flow path of the print head is generated. As a result, liquid refillability for the liquid ejection head is improved while retaining a liquid circulating function in the liquid ejection head so as to stabilize a liquid ejecting state in the liquid ejection head.
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