Brother Kogyo Kabushiki-Kaisha

Ryuji Kato

Masaya Fujioka

Shunichi Higashiyama

Noriatsu Aoi

Junichiro Sugimoto

Tomoyo Hamajima

Narumi Koga

Noriaki Satoh

Hideo Ohira

Akihiko Taniguchi

Narumi Kawai

Satoshi Okuda

Tatsuyoshi Nagase

Takaichiro Umeda

Tomoyuki Kubo

Hisaki Sakurai

Masashi Tsuda

Hideto Yamazaki

Masahito Kato

Hisako Tonishi

Yoshito Toyoda

Hideji Fukaya

Ai Tahara

Kazuma Goto

Goro Okada

Yuko Iwamura

Kenjiro Imai

Hitomi Sadohara

Mayuko Umemura

Chisato Hayashi

Eiji Kawamura

Masaya Fuijoka

There is provided an ink tank cap configured to open and close an ink inlet port of an ink tank, the ink tank cap including a contacting portion contacting with the ink inlet port, wherein the contacting portion of the ink tank cap is formed of an ethylene-propylene-diene rubber containing silicone.

Cap for ink tank, ink tank, and ink-jet recording apparatus

There is provided an ink-jet recording apparatus, including: a water-based ink which contains glycol ether and water; and an element which is configured to contact with the water-based ink, is formed of a polyacetal resin, and contains aliphatic amide in an amount of less than 29 ppm by weight.

Ink-jet recording apparatus

There is provided a water-based ink for ink-jet recording including a self-dispersible carbon black modified by carboxylic acid group, a water, and a water-soluble organic solvent, wherein a weight concentration of phosphate ion in the water-based ink is not more than 35 ppm. The water-based ink for ink-jet recording has excellent water resistance and is capable of lowering or preventing corrosion of a metal member, in an ink-jet recording apparatus, contacting with the water-based ink for ink-jet recording.

Water-based ink for ink-jet recording, ink cartridge, ink-jet recording apparatus, ink-jet recording method, method for producing water-based ink for ink-jet recording, and method for preventing corrosion of metal member of ink-jet recording apparatus

An ink cartridge including: wherein, in the general formula (1), 

Ink cartridge, method for manufacturing ink cartridge, ink-jet recording apparatus, and ink-jet recording method

The present invention provides a method of ink-jet recording that includes the steps of pretreating by applying a pretreatment liquid onto a recording medium in advance of ink-jet recording, and recording by ejecting a pigment ink onto the recording medium by an ink-jet method. The pretreatment liquid includes the following components (i) and (ii), and water.

Method of ink-jet recording, pretreatment liquid, ink set, and ink-jet recording apparatus

A treatment solution used for ink-jet recording, includes a quaternary alkylammonium salt represented by general formula (1) and water: 

Treatment solution for ink-jet recording, water-based ink set for ink-jet recording, ink-jet recording method, and ink-jet recording apparatus

There is provided a treatment solution used for ink-jet recording, including: quaternary alkylammonium hydroxide represented by general formula (1); an acid including at least one of dicarboxylic acid and tricarboxylic acid; and water; wherein the quaternary alkylammonium hydroxide is neutralized, to be a quaternary alkylammonium salt, by the at least one of the dicarboxylic acid and the tricarboxylic acid to have a degree of neutralization which is not less than 50% and not more than 110%; wherein each of R, R, Rand Ris an alkyl group having 1 to 4 carbon atoms; the alkyl group is a substituted alkyl group or an unsubstituted alkyl group, and is a straight chain alkyl group or a branched chain alkyl group; and the Rto Rare same with or different from one another.

Treatment solution for ink-jet recording, water-based ink set for ink-jet recording, ink-jet recording method and ink-jet recording apparatus

Provided is a treatment liquid used for ink-jet recording including polyallylamine, water, and at least one acid selected from the group consisting of amidosulfonic acid, and itaconic acid.

Treatment liquid for ink-jet recording, ink set, and ink-jet recording method

There is provided an image forming apparatus for forming an image on a recording medium, the image forming apparatus including: a first discharge head which discharges, toward the recording medium, an ink containing a coloring agent; a second discharge head which discharges, toward the recording medium, a liquid which improves image quality and which contains a component for coagulating or depositing the coloring agent; an energy emitting device which emits active energy; and a transport mechanism which transports the recording medium to a position opposed to the first discharge head and the second discharge head, wherein: at least one of the ink and the liquid contains a curable substance which is curable by being irradiated with the active energy.

Image forming apparatus and image forming method

A surface treatment solution for a recording paper on which ink-jet recording is performed with a water-based ink, the surface treatment solution includes calcium alginate which is contained by 0.008 wt % to 0.074 wt % in the surface treatment solution, sodium alginate which is contained by 0.013 wt % to 0.084 wt % in the surface treatment solution, a water-soluble organic solvent, and water.

Surface treatment solution, ink set, ink-jet recording method, and ink-jet recording apparatus

A printer comprises a first head which has first nozzles, a second head which has second nozzles each having a nozzle diameter larger than that of the first nozzle, and an ink cartridge which stores an ink to be supplied to the first and second heads. The first head is directly connected to the ink cartridge by means of a tube. The second head is connected to the first head by means of a tube, and thus the second head is connected to the ink cartridge via the first head. Accordingly, it is possible to shorten the tubes by connecting the ink cartridge and the two heads in series. Further, it is possible to decrease the frequency of the recovery operation by arranging, on the downstream side in the liquid supply direction, the head in which the jetting failure is hardly caused.

Liquid droplet jetting apparatus

A printer includes a first head in which first nozzles are formed, a second head in which second nozzles located at a higher position than the first nozzle are formed, and an ink cartridge positioned at a lower position than the first and second nozzles. Moreover, the first head is connected to the ink cartridge via a tube, and the second head is connected to the first head via a tube. Accordingly, the second head is connected to the ink cartridge via the first head. It is possible to shorten the tubes by connecting serially the ink cartridge and the two heads, and to prevent from breaking simultaneously a meniscus in the nozzles of both the heads located at different height positions.

Liquid droplet jetting apparatus including liquid tank and two heads connected in series

In an ink-jet recording apparatus, insoluble materials originating from rubber members employed in an ink passage are prevented from precipitating into a preservation solution or a water-based ink filled into the ink passage. The ink-jet recording apparatus in which the preservation solution or a water-based ink is filled into the ink passage, is configured such that a rubber member employed in the ink passage is formed of a rubber not containing a lubricant.

A printer comprises a fixed line type first head, a serial type second head, an ink cartridge which stores an ink to be supplied to the first and second heads, a first cap which is to be installed to the first head, and a second cap which is to be installed to the second head. The ink cartridge and the first and second heads are connected in series in this order by using tubes. Accordingly, it is possible to shorten the lengths of the tubes. The serial type head, in which the drying is hardly caused from a nozzle and the influence is exerted to a small extent on the jetting performance when any viscosity-increased liquid and/or bubbles is/are supplied, is arranged on the downstream side. Accordingly, it is possible to decrease the frequency of the recovery operation.

The ink-jet recording apparatus has an ink passage into which a water based ink or a preservation solution is filled. The ink passage employs a rubber member formed from a rubber which is formed of a butyl rubber polymer, a rubber polymer vulcanizable with an organic peroxide, and an organic peroxide. The water-based ink has a dynamic surface tension at a lifetime of 100 ms of about 35 mN/m to about 45 mN/m as measured by means of a maximum bubble pressure method at a measurement temperature of 25&#xb0; C. The preservation solution has a dynamic surface tension at a lifetime of 100 ms of about 30 mN/m to about 35 mN/m as measured by means of the maximum bubble pressure method at a measurement temperature of 25&#xb0; C.

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Aisai, Japan

Ryuji Kato