Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Other

Kazuhisa Takeda

Tsuyoshi Itou

Masahiro Ikuta

Takafumi Hara

Takayasu Aoki

Motonari Udo

Yasuhito Noda

Shigeru Fujiwara

Hisanobu Ajima

Hiromichi Mitamura

Kazuhiko Kikuchi

Yasunari Miyazaki

Yuichi Yokoyama

Masanori Takai

Satoshi Himeno

Yoshihito Shimada

An image forming apparatus according to an embodiment includes an image bearing body, a developing roller, a housing, and a gap adjusting member. The image bearing body includes a first rotating shaft and includes a first surface on which a latent image is formed. The developing roller includes a second rotating shaft, includes a second surface, includes a bearing, and supplies a developer to the latent image and develops the latent image. The housing rotatably supports the second rotating shaft. The gap adjusting member includes a shaft hole for rotatably receiving one end of the first rotating shaft and includes a cam surface. The gap adjusting member is turned around the first rotating shaft and is fixed to the housing in a turning position where a gap is uniform in a direction of the second rotating shaft of the developing roller.

Image forming apparatus

An image forming apparatus includes a forming unit, a generation unit, a storage unit, a correction unit, and a changing unit. The forming unit forms an image. The generation unit generates correction data for correcting density unevenness for each of a plurality of regions divided in a main scanning direction of an image formed by the forming unit. The storage unit stores the correction data generated by the generation unit. The correction unit corrects a density of an image to be formed by the forming unit for each of the plurality of regions based on the correction data stored by the storage unit. The changing unit changes an image formation density by the forming unit with a uniform amount of change for the plurality of regions after the correction data is generated by the generation unit.

Image forming apparatus and method correcting density unevenness for each divided region in a main scanning direction

According to one embodiment, there is provided a developer layer regulating member including: a magnetic material extending in an axis direction of a developing roller; a non-magnetic material facing the magnetic material; and first and second spot weld rows that bond the magnetic material to the non-magnetic material. The magnetic material includes a first end located near the developing roller and a second end located on an opposite side of the first end. The first spot weld row extends in the axis direction of the developing roller between the first and second ends of the magnetic material. The second spot weld row extends in the axis direction of the developing roller between the first spot weld row and the second end of the magnetic material.

Developer layer regulating member that controls a thickness of a developer layer

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

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

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 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.

Growing community of inventors

Shizuoka-ken, Japan

Kazuhisa Takeda