Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

The Pilot Ink Co., Ltd.

Kabushiki Kaisha Pilot Corporation

Other

Masahiro Ikuta

Tsuyoshi Itou

Takafumi Hara

Takayasu Aoki

Motonari Udo

Kazuhisa Takeda

Yasuhito Noda

Takashi Urabe

Satoshi Araki

Tsuyoshi Ito

Takahito Kabai

Shigeru Fujiwara

Hisanobu Ajima

Hiromichi Mitamura

Asumi Matsumoto

Sunao Takenaka

Koji Imamiya

Yoshihito Shimada

Koji Shimokusa

Hiroshi Mizuhata

According to one embodiment, there is provided a toner cartridge used in an image forming apparatus including a processor which forms a toner pattern image on a photoconductive member, transfers the toner pattern image on a medium, and changes an image forming condition based on a detection result obtained by optically detecting the toner pattern image transferred onto the medium, the toner cartridge including: a toner accommodating container accommodating a toner, and a memory. The memory stores reference data which is determined according to toner characteristics in the toner accommodating container, and is used for applying a reference value for an optical detection result of a toner pattern formed by the toner on the medium.

Toner cartridge and image forming apparatus

According to one embodiment, there is provided a toner cartridge used in an image forming apparatus including a processor which forms a toner pattern image on a photoconductive member, transfers the toner pattern image on a medium, and changes an image forming condition based on a detection result obtained by optically detecting the toner pattern transferred onto the medium, the toner cartridge including: a toner accommodating container accommodating a toner, and a memory. The memory stores a plurality of reference data which are determined according to toner characteristics in the toner accommodating container and a value indicating an image forming execution amount, and are used for applying reference values for an optical detection result of a toner pattern formed by the toner on the medium.

Toner cartridge and image forming apparatus using toner characteristics for improving image quality

A reversibly allochroic toner contains a binder resin and a colorant. The colorant reversibly switches between first and second color states in response to temperature changes. The colorant exhibits a hysteresis in a temperature-color state curve thereof in which the following relationships are satisfied.Tr&#x3c;T&#x3c;T&#x3c;T&#x3c;T&#x3c;TgT&#x2264;50&#xb0; C.20&#xb0; C.&#x2264;Tr&#x2264;30&#xb0; C.

Reversibly allochroic toner, method of producing the same, toner cartridge, and image forming apparatus

A developer according to an embodiment includes a toner having a color erasable by heating and a carrier. The carrier includes a core portion and a coating portion covering at least 50% of the core portion. The coating portion includes a white-colored additive agent which suppresses an increase in electrification due to friction between the toner and the carrier, a mass of the additive agent being between 20% and 60% of a total mass of the coating portion.

Developer with toner and carrier, and image forming apparatus using the same

Certain embodiments provide a marking apparatus, which marks on media that is reusable by recording and erasing decolorable material, comprising a scanner configured to read media to which a first mark representing the reuse times of media is attached; a determination section configured to determine whether or not the media is reusable according to a reading result of the first mark or a use state of the media; and a recording section configured to print a second mark different from the first mark on the media according to a determination result representing that the media cannot be reused.

Marking apparatus and decoloring apparatus

Disclosed is a decolorizable electrophotographic toner, including: a binder resin; and a colorant which contains at least a color developable compound and a color developing agent and is covered with an outer shell so as to have a capsule structure, wherein the number ratio of particles having an equivalent circle diameter of 0.6 &#x3bc;m or more and 2.5 &#x3bc;m or less of the toner when measured using a flow particle image analyzer after the toner is dispersed in an aqueous medium at a ratio of 0.08% by weight and the resulting dispersion is subjected to a stirring treatment in which stirring is performed at 5000 rpm for 30 minutes using a homogenizer (T-25 digital ULTRA-TURRAX (manufactured by IKA Japan K.K., provided with a shaft generator S25N-10G)) is 30% by number or less.

Electrophotographic toner and method for producing the same

In accordance with one embodiment, a color erasing apparatus comprises a conveyance path, a color erasing section and a control section. The conveyance path conveys a sheet. The color erasing section erases the color of an image formed with color erasable recording agent serving as recording agent containing coloring agent the color of which can be erased by heating. The control section carries out a control, in a case where the image formed on the sheet is not an image formed with the color erasable recording agent, so that the sheet is not subjected to a color erasing processing by the color erasing section.

Color erasing apparatus, color erasing system and color erasing control method

Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components.

Decolorizable toner

An image forming apparatus includes a first image forming unit configured to form a first image to be transferred to a sheet with a non-decolorizable material, and a second image forming unit configured to form a second image to be transferred to the sheet with a decolorizable material. At least a part of the second image transferred to the sheet is formed on the first image transferred to the sheet.

Apparatus and method for forming an image with a non-decolorizable material and a decolorizable material

A developer according to an embodiment includes a toner having a color erasable by heating and a carrier. The carrier includes a core portion and a coating portion covering at least 50% of the core portion. The coating portion includes an additive agent which suppresses an increase in electrification due to friction between the toner and the carrier. The additive agent has a white color.

A reversibly allochroic toner contains a binder resin and a colorant. The colorant reversibly switches between first and second color states in response to temperature changes. The colorant exhibits a hysteresis in a temperature-color state curve thereof in which the following relationships are satisfied.Tr&#x3c;T&#x3c;T&#x3c;T&#x3c;T&#x3c;TgT&#x2266;50&#xb0; C.20&#xb0; C.&#x2266;Tr&#x2266;30&#xb0; C. where, Tis a temperature at which the colorant starts to change from the first color state to the second color state, Tis a temperature at which the colorant completely changes to the second color state, Tis a temperature at which the colorant starts to change from the second color state to the first color state, Tis a temperature at which the colorant completely changes to the first color state, and Tg is a glass transition temperature of the binder resin.

Disclosed here is a method for producing a decolorizable electrophotographic toner, comprising mixing a first dispersion liquid in which a colorant is dispersed in an amount such that the content of the colorant in the toner is from 5% to 35% by weight, with a second dispersion liquid in which particles containing at least a binder resin and having a volume average particle diameter of 500 nm or less are dispersed, aggregating the colorant and the particles containing at least the binder resin, thereby obtaining aggregated particles, fusing the aggregated particles at a temperature lower than a completely decolorizing temperature of the colorant to obtain the toner, and measuring the number ratio of particles having an equivalent circle diameter of 0.6 &#x3bc;m or more and 2.5 &#x3bc;m or less of the toner using a flow particle image analyzer after the toner is subjected to a stirring treatment.

Growing community of inventors

Shizuoka-ken, Japan

Masahiro Ikuta