Canon Kabushiki Kaisha

Canon Aptex

Seiichiro Karita

Takatsuna Aoki

Shingo Okushima

Masami Ikeda

Akio Saito

Noriyasu Nagai

Toshio Kashino

Tsutomu Abe

Tsuyoshi Orikasa

Hiroshi Sugitani

Yutaka Koizumi

Teruo Arashima

Kazuhiro Yamada

Kazuaki Masuda

Asao Saito

Yumi Komamiya

Kouichi Omata

Akira Yamamoto

Masahiko Higuma

Shuzo Iwanaga

Eisuke Nishitani

Zentaro Tamenaga

Hiroki Tajima

Yoshifumi Hattori

Hideo Saikawa

Makiko Kimura

Haruhiko Terai

Akira Goto

Nobuyuki Kuwabara

Hiroyuki Ishinaga

Hiroshi Takabayashi

Naohito Asai

Yoshiyuki Nakagawa

Masaaki Izumida

Kenjiro Watanabe

Shuji Koyama

Kimiyuki Hayasaki

Takayuki Ono

Hideo Kanno

Jun Kawai

Kiyomitsu Kudo

Toshihiro Mori

Mitsuru Kurata

Megumi Saito

Isao Hayashi

Hiroshi Tajika

Noribumi Koitabashi

Kentaro Yano

Akio Suzuki

Hitoshi Sugimoto

Takashi Watanabe

Miyuki Matsubara

Haruo Uchida

Yoshiaki Takayanagi

Kazuyoshi Takahashi

Norio Ohkuma

Masami Kasamoto

Yuji Kamiyama

Shin Ishimatsu

Koichi Sato

Yoshiyuki Imanaka

Masahiko Kubota

Akira Nagashima

Makoto Aoki

Seiji Suzuki

Toshiaki Nagashima

Masahiro Haruta

Eiichiro Shimizu

Tsuyoshi Shibata

Takeshi Okazaki

Tatsuo Furukawa

Akihiro Yamanaka

Yasuhiro Sawada

Shinichi Tochihara

Yoshie Asakawa

Hiroyuki Ogino

Kumiko Mafune

Hiroto Takahashi

Takuto Moriguchi

Hiroyuki Maru

Hideaki Kishida

Hajime Yamamoto

Masanori Takenouchi

Sadayuki Sugama

Ryo Kasai

Nobuyuki Sato

Masashi Miyagawa

Aya Yoshihira

Hirofumi Hirano

Minoru Nozawa

Toru Yamane

Tamaki Sato

Takeshi Murase

Masashi Hayashi

Makoto Kashimura

Isao Ebisawa

Masashi Kitani

Susumu Ito

Makoto Shihoh

A liquid supply device attachable to and detachable from an image forming apparatus includes: a storage portion configured to store liquid; a supply portion configured to supply the liquid stored in the storage portion to the image forming apparatus; an atmosphere communication port opening to an outside of the liquid supply device; and a flow passage member including a connection flow passage formed therein. The liquid supply device is switchable, by movement of the flow passage member, between an open state in which the connection flow passage connects the storage portion to the atmosphere communication port, and a sealed state in which the connection flow passage does not connect the storage portion to the atmosphere communication port.

Liquid supply device

A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H×P×W>1.7 is satisfied when a height of the passage is set to H [μm], a length of the ejection opening portion is set to P [μm], and a length of the ejection opening portion is set to W [μm].

Liquid ejection head, liquid ejection apparatus, and method of supplying liquid

A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H&#xd7;P&#xd7;W&#x3e;is satisfied when a height of the passage is set to H [&#x3bc;m], a length of the ejection opening portion is set to P [&#x3bc;m], and a length of the ejection opening portion is set to W [&#x3bc;m].

An object of the present disclosure is to reduce liquid leakage resulting from detachment of a cartridge. One embodiment of the present invention is a printing apparatus including: a cartridge having a casing for storing liquid; and an attachment unit configured to attach the cartridge, and the cartridge has a hollow needle that connects with the attachment unit.

Printing apparatus

Provided is a liquid ejection head comprising: an ejection opening row along a first direction; a pressure chamber with print-element; a passage communicating with the pressure chamber; a supply opening row along the first direction with supply openings extending in a second direction to supply liquid to the passage; a collection opening row along the first direction with collection openings extending in the second direction to collect a liquid from the passage; a first common supply passage along the first direction to supply a liquid to the supply opening row; a first common collection passage along the first direction to collect a liquid from the collection opening row; a first supply side communication opening extending in the second direction to supply a liquid to the first common supply passage; and a first collection side communication opening extending in the second direction to collect a liquid from the first common collection passage, wherein at least one of the first supply side communication opening and the first collection side communication opening is provided at a plurality of positions.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H&#xd7;P&#xd7;W&#x3e;1.7 is satisfied when a height of the passage is set to H, a length of the ejection opening portion is set to P, and a length of the ejection opening portion is set to W.

A liquid ejection head has a plurality of ejection modules having a recording element substrate equipped with a plurality of ejection orifices for ejecting a liquid, a plurality of first flow path members that supports at least one of the ejection modules and a second flow path member provided in common with the first flow path members and supporting the first flow path members. The first flow path members and the second flow path member are equipped with a flow path for supplying a plurality of recording element substrates with a liquid. The first flow path members are joined with the second flow path member via an adhesive layer without being brought into direct contact with the second flow path member.

Liquid ejection head, liquid ejection apparatus and method of manufacturing liquid ejection head

In a printing apparatus including a circulation system circulating a liquid, a volatile component included in the liquid evaporates from an ejection opening and thus characteristics of the liquid involving with concentration or viscosity change. The invention provides a printing apparatus that uses a liquid ejection head including an ejection opening ejecting a liquid, a print element generating energy for ejecting a liquid, and a pressure chamber having the print element provided therein, the printing apparatus including: a circulator configured to circulate the liquid so that the liquid passes through the pressure chamber; and a concentration adjustment unit configured to adjust a concentration of a liquid inside a liquid circulation system by discharging the liquid from the inside of the liquid circulation system and replenishing the liquid into the liquid circulation system from the outside of the liquid circulation system in response to the amount of the discharged liquid.

Printing apparatus, printing method, and medium

A liquid discharge head includes a recording element board including multiple discharge orifices configured to discharge liquid, multiple pressure chambers that communicate with the multiple discharge orifices via discharge channels, and have therein recording elements configured to generate energy used to discharge liquid, a liquid supply channel configured to supply liquid to the multiple pressure chambers, and a liquid recovery channel configured to recover liquid from, the multiple pressure chambers. The multiple pressure chambers communicate with the liquid supply channel and the liquid recovery channel so that liquid flows through the multiple pressure chambers. The direction of flow of liquid in the multiple pressure chambers is the same direction.

Liquid discharge head

A liquid discharge device performs recording by use of a liquid discharge head including discharge ports to discharge a liquid, pressure generation elements to generate energy to be used to discharge the liquid, and pressure chambers communicating with the discharge ports. The liquid discharge device includes a control unit to control a temperature of the liquid discharge head by applying heat with heating elements arranged in divided areas of a region of the liquid discharge head where the discharge ports are arranged. When there is recording data for the discharge port in a certain one of the divided areas, the control unit causes the heating element in the divided area to generate heat, and when there is no recording data for the discharge port in the certain divided area, the control unit keeps the heating element in the certain divided area from generating heat.

Liquid discharge device and liquid discharge head

In order to keep possible local temperature differences in a liquid ejection head small to allow stable liquid ejection performance to be achieved, temperatures in a plurality of heating areas in a liquid ejection head are discretely controlled using heating elements and temperature detection elements.

Liquid ejection head, liquid ejection apparatus, and temperature control method for liquid ejection head

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Saitama, Japan

Seiichiro Karita