Canon Kabushiki Kaisha

Kazuya Yoshii

Naozumi Nabeshima

Soji Kondo

Ryo Shimamura

Akira Shiba

Yasuo Kotaki

Koichi Kubo

Norihiro Ikebe

Kenta Udagawa

Takeho Miyashita

Atsushi Arai

Tomoki Yamamuro

Tatsuaki Orihara

Kazumasa Matsushita

Hirofumi Okuhara

Masatoshi Ohira

Misato Furuya

Wataru Takahashi

Tatsuo Nanjo

Hiroshi Koshikawa

Shigeki Fukui

Masafumi Seki

Hiroki Hayashi

Satoshi Kimura

Kyosuke Toda

Noriyasu Nagai

Yasunori Senshiki

Tsubasa Takaoka

Keiichiro Tsukuda

Kenichi Kanno

Ryoji Inoue

Kyosuke Nagaoka

Hiroki Nakanishi

Masao Kato

Eiichiro Shimizu

Tetsuya Ohashi

Takashi Fukushima

Minako Kato

Katsuyuki Yokoi

Tsuyoshi Saeki

Masaaki Matsuura

Hironori Murakami

Yukimichi Kimura

Kyoshiro Okude

Manabu Ohara

Masahiro Kawanishi

Masato Koshimizu

Masateru Komori

A liquid ejection apparatus includes: an ejection head; a liquid reservoir; and a pressure control mechanism controlling a pressure of liquid supplied from the liquid reservoir and supplying the ejection head with liquid, the pressure control mechanism including a pressure chamber with the ejection head, a lever member connected to the valve element at a load and connectable to a pressure receiving member for a pressure of the pressure chamber at an effort, and a biasing mechanism biasing the valve element at the load of the lever member, the pressure control mechanism controlling a pressure of the pressure chamber. In the pressure control mechanism, a lever ratio, which is a ratio of a distance between the effort and fulcrum of the lever member to a distance between the load and fulcrum of the lever member, is greater than 1 and less than 5.

Liquid ejection apparatus and head unit

A liquid ejection head has an ejection module including a pressure chamber and an ejection element configured to eject a liquid in the pressure chamber, a supply channel, a collection channel connected to the supply channel through a pressure chamber, a first pressure adjustment unit, a second pressure adjustment unit, and a circulation pump. A controlled pressure in the first pressure adjustment unit is set higher than a controlled pressure in the second pressure adjustment unit. A pressure reception area of a second flexible member and a second pressing plate in a second pressure control chamber in a case where a second opening is brought into an open state is smaller than a pressure reception area of a first flexible member and a first pressing plate in a first pressure control chamber in a case where a first opening is brought into an open state.

Liquid ejection head

A liquid ejection head includes a pressure chamber communicating with an ejection port, an ejection element which ejects the liquid from the port, and a circulation path for the liquid including the chamber. The path includes a supply channel for supplying the liquid to the chamber, a collection channel for collecting the liquid from the chamber, a circulation pump which supplies the collected liquid to the supply channel, and a pressure adjustment unit configured to adjust a pressure on the liquid to be supplied to the supply channel. A pressure P21 on the liquid supplied to the chamber while the pump is stopped, a pressure P22 on the liquid supplied to the chamber while the pump is driven, and a pressure loss ΔP from the adjustment unit to the chamber while the pump is driven satisfy P22>P21 and P22−ΔP<0.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head includes a pressure chamber, an upstream channel, a downstream channel, a pump, an inflow channel, and a bypass channel. The upstream channel communicates with the pressure chamber to supply the liquid to the pressure chamber. The downstream channel communicates with the pressure chamber. The pump communicates with the upstream channel and the downstream channel to cause the liquid in the downstream channel to flow into the upstream channel. The inflow channel communicates with the upstream channel to cause the liquid to be supplied to the pressure chamber to flow into the upstream channel. The upstream channel and the downstream channel communicate with each other through the bypass channel without the pressure chamber being between the upstream channel and the downstream channel. Part of the liquid flowing from the upstream channel into the bypass channel flows into the pressure chamber through the downstream channel.

A liquid ejection apparatus includes: a liquid storage unit; a liquid ejection head; a liquid communication path to communicate the liquid storage unit with the liquid ejection head; and a liquid pressurization unit to supply a liquid in the liquid storage unit to the liquid ejection head through the liquid communication path by pressurization. The liquid ejection head includes: an inlet; a pressure chamber; and a circulation path through which the liquid supplied from the liquid communication path is circulated. The circulation path includes a supply channel, the pressure chamber, a collection channel, a circulation pump, and a pressure adjustment unit. The circulation pump is disposed at a position which is higher in the direction of gravity than a liquid inlet provided in a liquid channel extending from the liquid storage unit to the pressure adjustment unit and where the circulation pump is not in contact with the inlet.

Liquid ejection apparatus and liquid ejection head

A liquid ejection head includes: an ejection element configured to generate a pressure for ejecting the liquid; a supply channel through which the liquid is supplied to a pressure chamber; a collection channel connected to the supply channel through the pressure chamber and through which the liquid is collected from the pressure chamber; a circulation pump capable of supplying the liquid from the supply channel into the pressure chamber, and collecting the liquid in the pressure chamber through the collection channel and sending the liquid to the supply channel; a first pressure adjustment unit disposed between an outlet channel of the circulation pump and the supply channel and configured to adjust a pressure in the supply channel; and a second pressure adjustment unit disposed between an inlet channel of the circulation pump and the collection channel and configured to adjust a pressure in the collection channel.

A member includes a plurality of pad electrodes and a casing, wherein the plurality of pad electrodes are mounted on the casing and are rotatable relative to the casing on the casing.

Member including pad electrode, ink cartridge and recording apparatus

To provide a liquid storage container equipped with a plug member that can prevent leakage of a liquid from the liquid storage container and can be opened without causing scatter of the liquid, and a liquid ejection apparatus equipped with the liquid storage container. For the purpose, at least one of a connection part of the convex part with the cover part and an apical part of the convex part most apart from the connection part is provided offset from the centroid of the cover part, seen from a direction orthogonal to an opening surface of a supply port in a state that the plug member is mounted on a supply port of the liquid storage container.

Liquid storage container and liquid ejection apparatus

Provided is a sealing member to be used as a valve in a pressure adjustment mechanism. The sealing member includes a base member having high strength, and has high reliability. The sealing member includes an elastic member (valve portion) having an annular abutment portion (valve distal end portion) formed as an annular protrusion and the base member (lever portion). When a held portion having a tubular shape extending from the annular abutment portion is held in an annular groove formed in the base member, the elastic member is fixed to the base member. A holding length over which an annular groove holds the held portion along a depth direction of the base member is set longer than a width of the annular groove.

Sealing member, method of manufacturing the same, pressure adjustment mechanism, liquid ejection head, and liquid ejection apparatus

A pressure control unit includes a liquid storage chamber, an inflow port that allows the liquid to flow therein, and an outflow port that allows the liquid to flow out thereof, the pressure control unit controlling pressure of the liquid, wherein at least part of an outer wall of the liquid storage chamber is formed of a flexible film, a pressing plate that presses the flexible film, an urging member that urges the pressing plate, and a valve that opens and closes the outflow port. The pressing plate moves in a direction of expanding the liquid storage chamber, whereby the valve in contact with the pressing plate moves and makes a valve opening degree of the outflow port high. A range of motion of the valve when making the valve opening degree of the outflow port high is limited by a member other than the pressing plate.

Pressure control unit and liquid discharge device including pressure control unit

A liquid container unit includes: a liquid container including: a plurality of liquid storage portions; and a plurality of injection ports which are provided to the respective plurality of liquid storage portions, and are configured to enable injection of liquid into the plurality of liquid storage portions; and an injection port cover which is provided to the liquid container so as to be rotatable and is configured to cover the plurality of injection ports so as to be openable and closable, the injection port cover including a plurality of stopper members configured to close the plurality of injection ports when the injection port cover is closed.

Liquid container unit and recording apparatus

There are provided a liquid ejection apparatus with low costs, a liquid container, and a manufacturing method thereof. To this end, a rocking body is assembled to the liquid container to suppress the drop thereof by melting and swaging of a support shaft.

Liquid ejection apparatus, liquid container, and manufacturing method thereof

There are provided a liquid container including a plug member which prevents leakage of a liquid from the liquid container and can be opened without scattering the liquid and a liquid ejection apparatus including the liquid container. For that purpose, a projecting portion in the plug member is provided below a center part of the plug member in a gravity direction in an attitude at the time of use of the liquid ejection apparatus.

Liquid container and liquid ejection apparatus

Growing community of inventors

Yokohama, Japan

Kazuya Yoshii