Brother Kogyo Kabushiki-Kaisha

Yuko Iwamura

Hitomi Sadohara

Hiroto Sugahara

Hirofumi Kondo

Kazuma Goto

Akiko Miyajima

Ryuji Kato

Hiromitsu Sago

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

An ink set for ink-jet recording includes a dye ink containing a water-soluble dye and water and a pigment ink containing a self-dispersible pigment and water; wherein the dye ink further contains a polymer having a lactam structure; and the pigment ink further contains a substance having a surface active ability, a blending amount of the substance having the surface active ability being set in a ratio to fulfill a condition that a line width of a one-dot line is not less than 115 &#x3bc;m when an amount of one liquid droplet of the pigment ink to be discharged is set to be within a range of 22 pL to 28 pL and the one-dot line is printed on a regular paper sheet.

Dye ink for ink-jet recording, ink set including the same, ink-jet recording apparatus, and ink-jet recording method

A printer comprises an ink-jet head, and a control unit which has a judgment pattern printing control section. When a judgment pattern is printed, the judgment pattern printing control section allows the discharge of ink droplets of a second color to an area on which ink droplets of a first color are to be landed, before discharging the ink droplets of the first color having a small color difference with respect to a color of a medium. Accordingly, the ink discharge malfunction is reliably judged for the nozzle irrelevant to the color of the recording medium and the color of the ink discharged from the ink-jet head.

Printer and nozzle malfunction judgment program

An evaluation method for evaluating a pigment ink for ink-jet recording used together with a dye ink and containing a pigment and water includes an aggregation property evaluation method for the pigment in which 10 parts by weight of an aqueous sodium chloride solution is added to 100 parts by weight of the pigment ink; the evaluation method including first aggregation property evaluation adding an X wt % aqueous sodium chloride solution; and second aggregation property evaluation adding a Y wt % aqueous sodium chloride solution; wherein concentrations of the aqueous sodium chloride solutions are set to fulfill the following condition in the first and second aggregation property evaluations: 1.0&#x2266;X&#x3c;Y&#x2266;2.5. The optical density of a printed matter and the dispersion stability of the pigment when the pigment ink is brought in contact with the dye ink can be easily evaluated before the printing.

Method for evaluating pigment ink for ink-jet recording and method for producing pigment ink for ink-jet recording

A water-based ink for ink-jet recording includes a coloring agent and water. The coloring agent includes a dye represented by the following general formula (1). In the ink, an amount of glycerin is set so as to satisfy the following condition (A).3.5&#x2212;5&#x2266;1&#x2266;3.5&#x2003;&#x2003;(A) 

Water-based ink for ink-jet recording, ink cartridge, ink-jet recording apparatus and method of stabilizing water-based ink for ink-jet recording

The present invention provides a water-based ink for ink-jet recording containing a coloring agent and water. The coloring agent contains a dye represented by the following general formula (1). The ink further includes a substance having a structure in which a carbon atom and a nitrogen atom are covalently bound. 

Water-based ink for ink-jet recording, ink cartridge, and ink-jet recording apparatus

A liquid supply apparatus includes a container mounting portion and a liquid container. The liquid container includes a case configured to store liquid therein, and a movable member positioned in the case. The movable member and the case comprise a pair of magnetic materials on which a magnetic force acts, such that the pair of magnetic materials attracts each other. When the liquid container is not mounted to the container mounting portion, the movable member is in a fixed state in which the movable member is fixed to the case by the magnetic force acting between the pair of magnetic materials. The container mounting portion includes a release member configured to release the movable member from the fixed state by generating a magnetic force acting between the pair of magnetic materials, such that the pair of magnetic materials separates away from each other.

Liquid supply apparatuses and liquid containers

A liquid supply apparatus includes a container mounting portion and a liquid container. The liquid container includes a case configured to store liquid therein, a first movable member positioned in the case, a second movable member positioned on the case, and a retainer configured to retain the second movable member in the first position. The first movable member and the second movable member include a pair of magnetic materials. When the second movable member moves from a first position to a second position, the first movable member is released from a fixed state in which the first movable member is immovably fixed to the case by a magnetic force acting between the pair of magnetic materials.

Growing community of inventors

Nagoya, Japan

Yuko Iwamura