Canon Kabushiki Kaisha

Ken Tsuchii

Mineo Kaneko

Masataka Sakurai

Masaki Oikawa

Akiko Saito

Keiji Tomizawa

Shuichi Ide

Toru Yamane

Makoto Takamiya

Hidejiro Kadowaki

Kosuke Yamamoto

Masafumi Wataya

Haruhiko Takahashi

Mitsuhiro Matsumoto

Toshiyuki Yanaka

Kansui Takino

Keiichiro Tsukuda

Kenji Yabe

Tomoyuki Inoue

Yoshiyuki Nakagawa

Naozumi Nabeshima

Hiroshi Arimizu

Arihito Miyakoshi

Shuichi Murakami

Shinji Kishikawa

Makoto Shioya

Yasushi Miura

Nobuhito Yamaguchi

Hirokazu Komuro

Koichi Ishida

Norio Ohkuma

Yasushi Murayama

Haruhiko Moriguchi

Hideto Yokoi

Yumi Komamiya

Hajime Kishida

Takashi Fujikawa

Hiroshi Sugiyama

Hisashi Fukushima

Eisuke Nishitani

Nobuhiko Takekoshi

Masayoshi Tachihara

Masami Izumizaki

Yasuhiko Ishida

Akira Shibasaki

Yumi Kimura

Akio Suzuki

Masahiko Kubota

Osamu Sato

Mitsuhiro Ono

Ryoji Inoue

Kiyomitsu Kudo

Nobuyuki Hirayama

Yukuo Yamaguchi

Katsuhiro Shirota

Toshiaki Hirosawa

Toshiharu Inui

Kenta Udagawa

Masashi Miyagawa

Chiaki Muraoka

Genji Inada

Mikiya Umeyama

Yoshihiro Takada

Michinari Mizutani

Shintaro Kasai

Atsunori Terasaki

Kazuhiro Nakajima

Ryoji Kanri

Akiko Hammura

Akihiko Okano

Hideki Tanaka

Masao Furukawa

Tatsurou Mori

Yusuke Imahashi

Yasuhiko Osaki

Atsushi Hiramoto

Kazuhiko Okito

Seiichi Kamiya

Disclosed is a liquid discharge method of discharging liquid with a liquid discharge head having a heating surface that contacts and heats the liquid and a discharge port that faces the heating surface and discharges the liquid. The method includes heating the liquid through the heating surface to generate a bubble such that the bubble communicates with an atmosphere, thereby discharging the liquid. The liquid that is being discharged from the discharge port includes a trailing portion. The trailing portion moves toward the heating surface in response to a reduction in volume of the bubble and contacts the heating surface. The method further includes heating the trailing portion through the heating surface while the trailing portion is in contact with the heating surface, thereby generating a bubble.

Liquid discharge method and liquid discharge apparatus for heating a liquid through a surface to generate a bubble

Gas is ejected toward a region between a liquid ejection head and a recording medium so as to enlarge and stabilize a vortex generated by an airflow generated by liquid droplets ejected from ejection ports. Accordingly, an airflow turbulence generated between the liquid ejection head and the recording medium is reduced and displacements of positions at which the liquid droplets are applied due to the airflow turbulence are reduced.

Recording apparatus, recording method, and liquid ejection head for recording an image by ejecting liquid droplets toward a recording medium while moving the liquid ejection head and the recording medium relative to each other

Gas is blown at a predetermined speed from a predetermined area on an orifice substrate with reference to the position of an ejection port array.

Liquid ejection head and apparatus and method for printing

Provided is an inkjet print head in which, without causing an increase in print head size, printing elements that can perform ejection at a high frequency are densely arrayed. For this purpose, an ink supplying port and a wiring line, which are common to a predetermined number of printing elements, are prepared, and a substrate on which the ink supplying ports and the wiring lines are alternately arranged at the same pitches as an array pitch of the printing elements is also prepared.

Inkjet print head

A liquid ejecting head ejects liquid from a plurality of ejection orifices thereof for recording while being moved relative to a recording medium. The liquid ejecting head includes a gas discharge port configured to allow gas to be discharged therefrom. The gas discharge port is disposed on a downstream side of the ejection orifices in a direction of relative movement of the recording medium as viewed from the liquid ejecting head. The gas discharged from the gas discharge port joins an airflow that forms a vortex on an upstream side of the ejection orifices in the direction of relative movement. The vortex is generated by the liquid ejected from the ejection orifices.

Liquid ejecting head, recording apparatus, and recording method

A liquid ejection head includes The first energy generating element row, the first supply port row, the second supply port row, and the second energy generating element row are arranged in parallel in this order and the through hole is arranged between the first supply port row and the second supply port row.

Liquid ejection head

A method of manufacturing a liquid ejection head includes the steps of (1) forming a recess in a second surface of a substrate to form a common supply port, (2) forming an etching mask, which specifies opening positions of independent supply ports, on a bottom surface of the common supply port, and (3) performing ion etching using plasma with the etching mask employed as a mask, thereby forming the independent supply ports. The etching mask has an opening pattern formed therein such that respective distances from an ejection energy generation element to openings of two independent supply ports adjacent to the ejection energy generation element on the first surface side of the substrate are equal to each other.

Liquid ejection head and method of manufacturing same

An ink jet print head is configured to reduce the inclination of an ink ejection direction to make improper print conditions such as stripes and density unevenness unnoticeable. An individual wire is extended to lie under a common wire. Thus, wires under ink channels arranged on the respective opposite sides of a pressure chamber are symmetric. Consequently, an equivalent step structure is provided at the bottoms of the ink channels arranged on the respective opposite sides of the pressure chamber.

Ink jet print head

An ink jet print head is provided which can improve throughput by increasing an ink ejection frequency and prevent crosstalk among a plurality of heat application portions, realizing a capability of printing high-quality images at high speed. An opening size of the supply ports in a direction perpendicular to the array direction of the heat application portions is made greater than the length in the direction of electrothermal conversion elements. The supply ports are arranged along the array direction so that they adjoin the heat application portions in the array direction.

The liquid ejection head capable of securing a high performance of supplying liquid through supply ports while reducing the size of the substrate is provided. The liquid ejecting apparatus using such a liquid ejection head are also provided. The third supply ports situated between the first ejection port array and the second ejection port array include a portion of a large dimension and a portion of a small dimension.

Liquid ejection head and liquid ejecting apparatus

A liquid ejection head includes a member having a plurality of ejection openings for ejecting liquid, and a substrate having first and second element arrays having plural elements for generating energy used for ejecting liquid, and a supply port array having plural supply ports for supplying liquid to the elements. A wiring for driving the elements, which is connected to the elements of the second element array, passes between the supply ports of the supply port array and extends to a first element array side. A length of each of the supply ports of the supply port array is greater than a length of each of the elements of the first and second element arrays.

Liquid ejection head and ink jet printing apparatus

An ink jet print head having a reduced size still can prevent an overall temperature increase in a printing element board. To this end, among ink supply port arrays formed on both sides of each nozzle array, the heat resistance of the portion (beams) of the printing element board between the adjoining ink supply ports is lowered in those arrays that are close to the end portions of the common liquid chamber. In one embodiment, the volume of the beams is greater in those arrays that are close to the end portion.

A liquid jet recording head includes liquid discharge ports, pressure chambers, and a substrate which has the discharge energy generating element, a liquid chamber for storing a liquid supplied to the pressure chamber, a pair of paths which are separated from the liquid chamber, and a liquid supply port communicating with the liquid chamber. A liquid inlet port communicating with one path of the pair of paths and a liquid outlet port communicating with the other path of the pair of paths are opened on one surface of the substrate. A liquid flow path for discharging the liquid from the liquid chamber to the pressure chamber via the liquid supply port, and a liquid flow path for circulating the liquid from the one path to each pressure chamber via the liquid inlet port, and further from each pressure chamber to the other path via the liquid outlet port are provided.

Liquid jet recording head and liquid supply method

Growing community of inventors

Sagamihara, Japan

Ken Tsuchii