Canon Kabushiki Kaisha

Satoshi Kudo

Kiyomitsu Kudo

Kenji Moribe

Akira Tsujimoto

Daiji Okamura

Mikio Sanada

Kumiko Mafune

Hideki Yamakami

Toru Suzuki

Yukako Tamanuki

Yukuo Yamaguchi

Genji Inada

Junji Shimoda

Junichi Sakai

Yojiro Kojima

Yoshio Kinoshita

Shogo Takemoto

Satoshi Kimura

Chiaki Muraoka

Takashi Saito

Hiroshi Tomioka

Mikiya Umeyama

Yuichiro Akama

Minako Kawabe

Tomonari Watanabe

Hiroyuki Takuhara

Kuniaki Fujimoto

Hisashi Fukai

Yuuki Nishino

Yuki Nishino

Mitsuru Ishii

Fumiharu Nakamura

Otome Yamashita

Otome Mori

Tomohiro Yamashita

Kimiyuki Hayasaki

Masaki Oikawa

Takayuki Ono

Keisuke Matsuo

Keiji Tomizawa

Tsuyoshi Orikasa

Torachika Osada

Toru Yamane

Masayuki Ikegami

Masashi Ogasawara

Hiroyuki Fukushima

Shingo Nagata

Tomotsugu Kuroda

Jun Yoshizawa

Masaru Iketani

Koji Yamakawa

Hiroyuki Kigami

Masashi Tsujimura

Tetsu Iwata

Arihiro Saito

Hiroyuki Shimoyama

Satomi Yanagimachi

Fumihiko Mukae

Ryosuke Nagao

Masayoshi Okawa

An element substrate is bonded to a support substrate with high positional accuracy. A manufacturing method of the liquid ejecting head includes curing a first adhesive, which is in contact with an element substrate and a support substrate, at a first temperature to perform first temporary fixing, heating a second adhesive, which is in contact with the element substrate and the support substrate, to a second temperature higher than the first temperature so as to cure the second adhesive and perform second temporary fixing and heating a third adhesive, which is in contact with the element substrate and the support substrate, to a third temperature higher than the second temperature so as to cure the third adhesive and bond the element substrate to the support substrate. An elastic modulus of the second adhesive is larger than an elastic modulus of the first adhesive at the second temperature.

Liquid ejecting head and manufacturing method thereof

An ink jet recording method is capable of suppressing generation of image streaks and recording a high-quality image when using a recording apparatus equipped with a line head. The ink jet recording method records an image on a recording medium by using an ink jet recording apparatus equipped with a line head. In this method, the line head has a plurality of recording element substrates each having a nozzle array made up of a plurality of nozzles which eject an aqueous ink. The recording element substrates are arranged in a predetermined direction. An average temperature Te (&#xb0; C.) of the aqueous ink ejected from terminal-portion nozzles constituting the terminal portions of the nozzle arrays and an average temperature Tc (&#xb0; C.) of the aqueous ink ejected from center-portion nozzles constituting the center portions of the nozzle arrays satisfy the following relationship: Te&#x3e;Tc.

Ink jet recording method and ink jet recording apparatus

An ink jet recording method uses an ink jet recording apparatus equipped with a line head that includes a plurality of recording element substrates each having a nozzle array comprised of a plurality of nozzles, which eject an aqueous ink, arranged in a predetermined direction. The recording element substrates are arranged in the predetermined direction such that each of the recording element substrates constitutes an overlapping portion at which a terminal portion of the recording element substrate is overlapped with a terminal portion of an adjacent recording element substrate in the predetermined direction. The method includes setting the average temperature To (&#xb0; C.) of an ink ejected from overlapping-portion nozzles included in the overlapping portion of the nozzle array and the average temperature Tc (&#xb0; C.) of an ink ejected from the center-portion nozzle included in the center portion of the nozzle array so as to satisfy the relationship Tc&#x3e;To.

An aqueous ink for ink jet contains a self-dispersible pigment in which a first functional group including a phosphonic acid group and a second functional group including at least one of a carboxylic acid group and a sulfonic acid group are bonded to a particle surface, wherein a surface charge amount derived from the phosphonic acid group included in the above-described first functional group is 0.3 micromoles/mor more, a total surface charge amount derived from the carboxylic acid group and the sulfonic acid group included in the above-described second functional group is 1.0 micromoles/mor more, and a total surface charge amount derived from anionic groups included in the above-described first functional group and the above-described second functional group is 2.0 micromoles/mor more and 8.0 micromoles/mor less.

Aqueous ink, ink cartridge, and ink jet recording method

The present invention provides an ink jet ink that is capable of recording an image excellent in light resistance and ozone resistance and has excellent intermittent ejection stability. The ink jet ink contains a coloring material and a water-soluble organic solvent. The coloring material contains a compound represented by the following general formula (I), the water-soluble organic solvent contains ethylene urea end an alkanediol having 4 to 6 carbon atoms, and a content A (% by mass) of the coloring material, a content B (% by mass) of the ethylene urea and a content C (% by mass) of the alkanediol having 4 to 6 carbon atoms based on a total mass of the ink satisfy relationships of 0.20&#x2266;B/A&#x2266;10.0 and 0.10&#x2266;C/A&#x2266;10.0. 

Ink, ink cartridge and ink jet recording method

The invention provides an ink containing a first coloring material and a second coloring material, wherein the first coloring material is a compound represented by a general formula (1), and the second coloring material is a compound represented by a general formula (2). 

Provided is an ink capable of recording an image that is excellent in ozone resistance, hardly causes blurring or color change even in a high-humidity environment, and is excellent in humidity resistance. The ink includes a coloring material and a lithium ion. The coloring material includes a compound represented by the following general formula (I) and a content of the lithium ion in the ink is 3.5 times or more in terms of molar ratio with respect to a content of the compound represented by the general formula (I). 

An object of the present invention is to provide an ink jet recording method which gives an ink excellent anti-sticking properties and can suppress the occurrence of undertrapping when recording surfaces of recording media which each have an ink-receiving layer are overlapped with each other, and to provide an ink jet recording apparatus. The ink jet recording method of forming an image on the recording medium having the ink-receiving layer by ejecting an ink from an ink jet recording head, the method including performing at least one of drying the recording medium which has the image formed thereon and humidifying a gap between the recording head and the recording medium, wherein the ink to be used for forming the image is an ink which contains water, a water-soluble organic solvent and a specific compound.

An ink jet recording method includes an image formation step of forming an image on a recording medium having an ink-receiving layer by ejecting an ink from an ink jet recording head and a humidification step of humidifying a gap between the recording head and the recording medium, in which in the image formation step, an ink containing a specified dye represented by general formula (I) and a water-soluble organic compound having an inorganic-organic balance value of 1.4 or more to 2.7 or less is used.

An ink jet recording method includes an image formation step of forming an image on a recording medium having an ink-receiving layer by ejecting an ink from an ink jet recording head and a humidification step of humidifying a gap between the recording head and the recording medium, in which in the image formation step, at least a cyan ink containing a specific dye and a magenta ink containing a specific dye are used.

An aqueous ink to be used together with a pigment ink containing a pigment and a polymer, wherein the aqueous ink contains a reactive component for destabilizing the dispersion state of the pigment, the dynamic surface tension of the aqueous ink at a lifetime of 30 milliseconds is 41 mN/m or more, and the dynamic surface tension of the aqueous ink at a lifetime of 500 milliseconds is from 28 mN/m or more to 38 mN/m or less as determined by a maximum bubble pressure method.

Aqueous ink, ink set, image forming method and image forming apparatus

An ink jet ink providing an image having excellent lightfastness and having sticking resistance and intermittent ejection stability. The ink jet ink is characterized by containing at least a compound represented by the following general formula (I) and a compound represented by the following general formula (II). 

Ink jet ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus

The impact accuracy of ejected droplets, the quality of printed images, and print speed can be improved in a print head having an ink channel for which the width thereof in a direction orthogonal to an ink supply direction in which ink is supplied from an ink supply port to a pressure chamber is smaller than that of a pressure chamber. In the print head, the center of a heater along the ink supply direction is offset from the center of the pressure chamber along the ink supply direction, toward the side of the pressure chamber far from the ink supply port in the ink supply direction.

Print head with offset ejection ports

An ink jet recording head includes an element substrate; a plurality of ejection outlets, provided on the element substrate, for ejecting ink in a direction perpendicular to the element substrate; and a nozzle formation member having a plurality of ink flow paths which are in fluid communication with the ejection outlets, respectively. The ink flow paths are arranged at a density higher than 1200 dpi in an arranging direction of the ejection outlets and widths of flow passage walls forming the ink flow paths are smaller than heights of the ink flow paths and are smaller than widths of the ink flow paths.

Ink jet recording head

The present invention provides an ink jet ink, which gives a superior lightfastness to an ink image, has a superior sticking resistance and intermittent ejection stability, and gives a preferable color tone to the image. The ink includes an azo-based dye represented by formula (I) and a water-soluble organic solvent represented by bis(2-hydroxyethyl)sulfone represented by formula (II). 

Ink jet ink, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus

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Kawasaki, Japan

Satoshi Kudo