公开(公告)号：US11453213B2

公开(公告)日：2022-09-27

申请号：US16727524

申请日：2019-12-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： Rei Kurashima ,  Akihisa Iio ,  Takahiro Akiyama ,  Toru Nakakubo ,  Noriyuki Kaifu

IPC: B41J2/045

Abstract: 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.

公开(公告)号：US20210347172A1

公开(公告)日：2021-11-11

申请号：US17380246

申请日：2021-07-20

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：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

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

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：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

IPC: B41J2/14 ,  B41J2/145

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.

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

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

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：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

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/045

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.

公开(公告)号：US20200331271A1

公开(公告)日：2020-10-22

申请号：US16844632

申请日：2020-04-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tomohiro Takahashi ,  Toru Nakakubo ,  Akio Saito ,  Takeyori Sato ,  Katsumi Eda ,  Takeshi Shibata

IPC: B41J2/16 ,  H01L21/683 ,  H01L21/02 ,  H05K1/03

Abstract: 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.

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

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：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

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

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.

公开(公告)号：US20200001605A1

公开(公告)日：2020-01-02

申请号：US16452336

申请日：2019-06-25

Applicant: CANON KABUSHIKI KAISHA

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

IPC: B41J2/14 ,  H01L23/00

Abstract: A semiconductor element includes an insulation layer and a pad portion for electrical connection to an external portion by wire bonding. The insulation layer includes a plurality of projections projecting from a main surface of the insulation layer. The pad portion is disposed on an upper surface of each of the projections without extending beyond the upper surface of the projection on which the pad portion is formed.