公开(公告)号：US12138924B2

公开(公告)日：2024-11-12

申请号：US18485183

申请日：2023-10-11

Applicant: CANON KABUSHIKI KAISHA

Inventor： Naoko Shimizu ,  Toru Nakakubo ,  Kazuhiro Yamada ,  Atsushi Teranishi ,  Osamu Kanome

IPC: B41J2/14 ,  B41J2/18

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：US20240034061A1

公开(公告)日：2024-02-01

申请号：US18485183

申请日：2023-10-11

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.

公开(公告)号：US11850855B2

公开(公告)日：2023-12-26

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.

公开(公告)号：US20230150260A1

公开(公告)日：2023-05-18

申请号：US17984322

申请日：2022-11-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Rei Kurashima ,  Toru Nakakubo ,  Hiroyuki Ozaki

IPC: B41J2/045 ,  B41J2/175

CPC classification number: B41J2/04588 ,  B41J2/04541 ,  B41J2/17596 ,  B41J2/17523 ,  B41J2/17556

Abstract: 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.

公开(公告)号：US11602934B2

公开(公告)日：2023-03-14

申请号：US16719189

申请日：2019-12-18

Applicant: CANON KABUSHIKI KAISHA

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

IPC: B41J2/14 ,  B41J2/045

Abstract: 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.

公开(公告)号：US20220297442A1

公开(公告)日：2022-09-22

申请号：US17835481

申请日：2022-06-08

Applicant: CANON KABUSHIKI KAISHA

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

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

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：US20210394515A1

公开(公告)日：2021-12-23

申请号：US17348633

申请日：2021-06-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Rei Kurashima ,  Hiroyuki Ozaki ,  Toru Nakakubo

IPC: B41J2/14

Abstract: 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.

公开(公告)号：US11027548B2

公开(公告)日：2021-06-08

申请号：US16452162

申请日：2019-06-25

Applicant: CANON KABUSHIKI KAISHA

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

IPC: B41J2/14

Abstract: A liquid ejection head includes an ejection port member that includes an ejection port that ejects a liquid, an energy generating element that generates energy for ejecting the liquid from the ejection port, a terminal electrically connected to the energy generating element, and a substrate portion that supports the ejection port member, the energy generating element, and the terminal. The terminal is connected to a wire member that supplies electric power that drives the energy generating element to the energy generating element, the substrate portion includes a hole portion formed from a surface of the substrate portion on a side opposite to a surface of the substrate portion on which the terminal is provided to a surface where the terminal is exposed, and an area of the surface where the terminal is exposed is smaller than an area of an opening of the hole portion.

公开(公告)号：US10857794B2

公开(公告)日：2020-12-08

申请号：US16385847

申请日：2019-04-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yohei Nakamura ,  Toru Nakakubo

IPC: B41J2/14 ,  B41J2/16

Abstract: There is provided a liquid ejection head whose resolution may be enhanced without narrowing a wiring pitch, and a manufacturing method thereof. To that end, integrated circuits are arranged on a same substrate as that of piezoelectric elements.

公开(公告)号：US20200207093A1

公开(公告)日：2020-07-02

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.