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公开(公告)号：US11813864B2
公开(公告)日：2023-11-14
申请号：US17538775
申请日：2021-11-30
Applicant: CANON KABUSHIKI KAISHA
Inventor： Naoko Shimizu , Toru Nakakubo , Kazuhiro Yamada , Atsushi Teranishi , Osamu Kanome
IPC: B41J2/14
CPC classification number: B41J2/14145 , B41J2/1404 , B41J2/14016 , B41J2002/14306 , B41J2202/20 , B41J2202/21
Abstract: 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.
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公开(公告)号：US20230264478A1
公开(公告)日：2023-08-24
申请号：US18142431
申请日：2023-05-02
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：US20210323310A1
公开(公告)日：2021-10-21
申请号：US17362492
申请日：2021-06-29
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yoshiyuki Nakagawa , Toru Nakakubo , Ryo Kasai , Takuro Yamazaki
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：US11090937B2
公开(公告)日：2021-08-17
申请号：US16682120
申请日：2019-11-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiyuki Nakagawa , Kazuhiro Yamada , Takuro Yamazaki , Toru Nakakubo , Ryo Kasai
Abstract: In a liquid ejection head, ejection orifices can be densely arranged while suppressing decrease in liquid flow speed. A channel extending through a pressure chamber extends in a direction crossing an ejection orifice array such that a liquid flows between the two ends of the channel located on the sides of the ejection orifice array.
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公开(公告)号：US11065878B2
公开(公告)日：2021-07-20
申请号：US16710367
申请日：2019-12-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yoshiyuki Nakagawa , Toru Nakakubo , Ryo Kasai , Takuro Yamazaki
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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Patent Agency Ranking
公开(公告)号：US11065872B2
公开(公告)日：2021-07-20
申请号：US16590127
申请日：2019-10-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiko Osaki , Shingo Okushima , Yoshiyuki Nakagawa , Kazuhiro Yamada , Naozumi Nabeshima
Abstract: A liquid ejection head includes a nozzle including an ejection port for ejecting a liquid for performing recording on a recording medium, and a pressure chamber in which an energy generating element that generates energy used for ejecting the liquid from the ejection port is disposed; and a heating unit that heats the liquid. In the liquid ejection head, the liquid in the pressure chamber is circulated to and from the outside of the pressure chamber, and an average number of preliminary ejections per nozzle during an operation period in which the recording is performed is equal to or greater than 0 and equal to or less than 20.
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公开(公告)号：US10974504B2
公开(公告)日：2021-04-13
申请号：US16720940
申请日：2019-12-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takuro Yamazaki , Yoshiyuki Nakagawa , Toru Nakakubo , Kazuhiro Yamada , Ryo Kasai
Abstract: A liquid ejection head can stably eject a liquid from an ejection port by mitigating thickening of the liquid by evaporation from the ejection port. The liquid ejection head has a support substrate; a liquid chamber arranged on the support substrate and provided with an energy generating element for generating energy necessary for ejection of a liquid and an ejection port from which the liquid is ejected; and a circulation flow path of the liquid that passes through the liquid chamber. The liquid ejection head further has a first circulating element that forms a first circulatory flow in the circulation flow path; and a second circulating element that forms a second circulatory flow inside the liquid chamber and a driving frequency of the first circulating element is lower than a driving frequency of the second circulating element.
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公开(公告)号：US20200247136A1
公开(公告)日：2020-08-06
申请号：US16857795
申请日：2020-04-24
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：US20200207101A1
公开(公告)日：2020-07-02
申请号：US16710367
申请日：2019-12-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuhiro Yamada , Yoshiyuki Nakagawa , Toru Nakakubo , Ryo Kasai , Takuro Yamazaki
Abstract: A liquid ejection head includes: a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pump 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, 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：US20200139708A1
公开(公告)日：2020-05-07
申请号：US16709493
申请日：2019-12-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yoshiyuki Nakagawa , Kazuhiro Yamada , Yohei Nakamura , Naozumi Nabeshima
Abstract: The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid to the first individual flow path, and a second common flow path for supplying liquid to the second individual flow path. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and a second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.
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