公开(公告)号：US11673396B2

公开(公告)日：2023-06-13

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

IPC: B41J2/175 ,  B41J2/16 ,  B41J2/14

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.

公开(公告)号：US11376863B2

公开(公告)日：2022-07-05

申请号：US16857795

申请日：2020-04-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kazuhiro Yamada ,  Toru Nakakubo ,  Yoshiyuki Nakagawa ,  Shingo Okushima

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/19 ,  B41J2/175

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.

公开(公告)号：US20220176700A1

公开(公告)日：2022-06-09

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: B41J2/16 ,  B41J2/14

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.

公开(公告)号：US11161351B2

公开(公告)日：2021-11-02

申请号：US16573548

申请日：2019-09-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Masataka Kato ,  Takuya Hatsui ,  Souta Takeuchi ,  Masaya Uyama ,  Toru Nakakubo ,  Tomohiro Takahashi

IPC: B41J2/235 ,  B41J2/305 ,  B41J2/03 ,  B41J2/14 ,  B41J2/16

Abstract: 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.

公开(公告)号：US11135838B2

公开(公告)日：2021-10-05

申请号：US16422342

申请日：2019-05-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takuya Hatsui ,  Souta Takeuchi ,  Masataka Kato ,  Masaya Uyama ,  Toru Nakakubo ,  Tomohiro Takahashi

IPC: B41J2/14 ,  B41J2/175 ,  B41J2/16

Abstract: A liquid ejection head including an element substrate including an ejection port, an energy generating element generating energy to eject a liquid from the ejection port, and a terminal electrically connected to the energy generating element, and an electric connection member connected to the terminal and that supplies electric power to the energy generating element. The element substrate includes a hole portion drilled from a surface of the element substrate opposite a surface of the element substrate in which the ejection port is provided to the terminal. A sealing member is provided inside the hole portion, the sealing member covering a connection portion. The liquid ejection head further includes a fixing member in contact with the surface of the element substrate in which the ejection port is formed, the fixing member being provided at a position corresponding to the hole portion.

公开(公告)号：US11090935B2

公开(公告)日：2021-08-17

申请号：US16727511

申请日：2019-12-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Toru Nakakubo ,  Akihisa Iio ,  Rei Kurashima ,  Takahiro Akiyama ,  Hiroyuki Ozaki

IPC: B41J2/14

Abstract: 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.

公开(公告)号：US11084300B2

公开(公告)日：2021-08-10

申请号：US16656336

申请日：2019-10-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yohei Nakamura ,  Akio Saito ,  Zentaro Tamenaga ,  Toru Nakakubo

IPC: B41J2/14 ,  B41J2/335

Abstract: A liquid discharge head includes a recording element substrate. The recording element substrate includes a discharge aperture forming member defining a discharge aperture from which a liquid is discharged and a substrate having a pressure generating element that pressurizes the liquid so as to discharge the liquid. The liquid discharge head also includes a cover member that defines an opening through which the discharge aperture is exposed. The cover member is disposed on a side of the recording element substrate on which the discharge aperture is formed. In the liquid discharge head, the recording element substrate further includes an electrode disposed on a side of the substrate on which the discharge aperture forming member is formed and an insulation member that covers the electrode. In addition, the insulation member is covered by the cover member.

公开(公告)号：US10960666B2

公开(公告)日：2021-03-30

申请号：US16708253

申请日：2019-12-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Ryo Kasai ,  Kazuhiro Yamada ,  Takuro Yamazaki ,  Yoshiyuki Nakagawa ,  Toru Nakakubo

IPC: B41J2/14 ,  H01L23/34 ,  H01L29/417 ,  H01L29/423 ,  H01L29/78

Abstract: According to an embodiment of the present disclosure, to improve a layout efficiency of an element substrate to be integrated in a printhead and reduce a production cost of the element substrate, a driving method and a size of a first driver transistor used for driving a first heater for ink circulation and a driving method and a size of a second driver transistor used for driving a second heater for discharging ink to print are optimized, respectively. More specifically, the first driver transistor and the second driver transistor have multi-finger configurations, gate widths of the multi-finger configurations are equal to each other, and the number of fingers forming each first driver transistor is different from the number of fingers forming each second driver transistor.

公开(公告)号：US20200207086A1

公开(公告)日：2020-07-02

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

IPC: B41J2/145 ,  B41J2/14

Abstract: An object of the present disclosure is to densely arrange ejection orifices while suppressing decrease in liquid flow speed. A channel extending through a pressure chamber extends in a direction crossing an ejection orifice array L such that a liquid flows between the two ends of the channel located on the sides of the ejection orifice array L.

公开(公告)号：US10661565B2

公开(公告)日：2020-05-26

申请号：US16000238

申请日：2018-06-05

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yoshiyuki Nakagawa ,  Takuro Yamazaki ,  Kazuhiro Yamada ,  Toru Nakakubo

IPC: B41J2/14

Abstract: In a circulating system which circulates liquid within a liquid ejecting head, thickening of liquid in the vicinity of an ejection port section can be more securely suppressed. The ejection port section includes a first ejection port disposed at an upstream side with respect to an ejecting direction of ink and a second ejection port disposed at a downstream side with respect to the ejecting direction. The second ejection port includes an enlarged diameter portion whose diameter is enlarged in a radially outward manner from at least a part of an opening edge portion of the first ejection port.