Ricoh Company, Ltd.

Tohoku Ricoh Co., Ltd.

Takashi Bisaiji

Mitsuru Takahashi

Yasunori Kawaishi

Noboru Sawayama

Hirokatsu Suzuki

Takeyoshi Sekine

Toshiaki Motohashi

Hideo Yu

Satoru Ishikake

Hideki Kamiyama

Satoshi Takano

Kazunori Bannai

Koji Hayashi

Ryuji Yoshida

Takayuki Maruta

Itaru Matsuda

Mitsuru Seto

Nobuhiro Nakayama

Yuko Harasawa

Hiroomi Tamura

Kouji Hayashi

Makoto Ohsaki

Tetsuro Miura

Kazunari Yamada

Toshiyuki Kabata

Takeshi Shintani

Shinya Kobayashi

Tsuneo Kurotori

Masahide Yamashita

Tadashi Kasai

Satoshi Hatori

Jun Okamoto

Katsunori Kurose

Shin Kayahara

Takeshi Takemoto

Masato Iio

Yasutada Shitara

Takamasa Ozeki

Jun Aoto

Nobuyuki Koinuma

Chikara Imai

Tsuyoshi Asami

Yasuo Hirano

Mitsuo Tanaka

Kouji Ishigaki

Toshio Kawakubo

Akio Tsujita

Wataru Yasuda

Hirohmi Tamura

Yuji Sawai

Haruki Saitoh

Kentarou Matsumoto

Maiko Koeda

Moriyuki Koike

Katsuhisa Tsuji

Shigeru Fukuda

Hideo Yoo

Kazumi Kuwata

Hijiri Ogata

Naoko Iwata

Masaki Tokuhashi

Hideo Yuu

Kathuhiro Shinohara

Norimitu Kikuchi

Norimitsu Kikuchi

Kohichiro Jinnai

A toner including base particles and external additives on the base particles, the toner satisfying Conditions 1 and 2 defined in the specification, when a number distribution D of particle diameters of powder particles B generated from one base particle A is calculated from a density a of the base particles A and a density b of the powder particles B, where the base particles A and the powder particles B are deposited on an adhesive area and mica respectively by feeding the toner into a vacuumed space from an inlet, and allowing the toner to crush against a surface of a substrate having the adhesive area composed of a carbon tape, and the mica disposed in a manner that the surface is orthogonal to a direction connecting between center of the vacuumed space and center of the inlet, Powder particles B: particles detached from the base particles.

Toner, toner stored unit, image forming apparatus, and image forming method

An image forming apparatus including multiple imaging units and a fixing unit is provided. Each of the imaging units includes an image bearing member, a developing device containing a toner including a pressure-induced phase transition resin or a thermoplastic resin, a transfer device, and an image bearing member cleaner, and is adapted to form a toner image with the toner. The fixing unit includes a pressure fixing device adapted to fix the toner including the pressure-induced phase transition resin on the recording medium by applying a temperature Tb and a pressure Pb thereto in a pressure fixing nip, and a heat fixing device adapted to fix the toner including the thermoplastic resin on the recording medium by applying a temperature Ta and a pressure Pa thereto in a heat fixing nip. The image forming apparatus satisfies the following inequations: Tb&#x3c;Ta and Pb&#x3e;Pa.

Image forming apparatus with fixing unit adapted to fix toner including pressure-induced phase transition toner

The image forming method comprising: forming a toner image on an image carrier; transferring the toner image formed on the image carrier onto a recording medium; and transforming the toner image on the image carrier into a semi-film by applying a pressure. And the image forming apparatus comprising: an image carrier; a toner image forming unit configured to form a toner image on the image carrier; a transfer unit configured to transfer the toner image formed on the image carrier onto a recording medium; and a toner image transforming unit configured to transfer the toner image on the image carrier into a semi-film by applying a pressure to the toner image.

Image forming method and image forming apparatus for transforming a toner image into a semi-film

An image forming apparatus comprising: a plurality of housing units that houses toners of mutually different colors, at least one toner inside of the plurality of housing units being to be used for forming a toner image on a recording medium; and a fixing unit configured to fix the toner image on the recording medium to the recording medium, wherein a housing unit among the plurality of housing units that houses a toner with a lowest peak temperature of loss elastic modulus is disposed in a portion with a lower temperature than a temperature of a portion where another housing unit is disposed, or in a position farther from the fixing unit than a portion where another housing unit is disposed.

Image forming apparatus

An image forming method including forming a toner image on a transfer medium with a toner comprising a wax having a polar group, and applying a varnish to the toner image. The wax may be a plant wax having an ester group, a wax having a polar group derived from a fatty acid, an oxidized wax, or a mixture thereof. The varnish may include a surfactant, such as a polyoxyethylene glycol, and may be photocurable.

Image forming method, image forming apparatus, varnish applicator, and toner

An image forming apparatus is disclosed, including: a toner image forming unit which forms a toner image on a surface of a transfer material, the toner image being an image formed of toner, the toner containing wax; a fixing device which fixes the toner image using a fixing member on which a mold release agent including oil is applied; and a surface processing device which processes the fixed surface of the transfer material, on which surface the toner image is fixed using the fixing member on which the mold release agent including the oil is applied, wherein the surface processing device further includes a discharging unit which generates a discharge on or near the fixed surface of the transfer material, on which surface the fixed toner image is formed.

Image forming apparatus and image forming system

An image forming apparatus of the type sequentially forming toner images of different colors on an image carrier while sequentially transferring them to an intermediate transfer body one above the other, and then transferring the resulting composite toner image from the intermediate transfer body to a paper or similar recording medium. Dot toner images different from desired toner images are formed on the image carrier. The dot toner images are transferred from the image carrier to the intermediate transfer body and then to the recording medium. The individual toner images are transferred from the image carrier to the intermediate transfer body in accurate register with each other.

Image forming apparatus which forms an inconspicuous dot pattern prior to image transfer

When an ACC menu is called out on a liquid crystal screen of an operating section, the screen shown in FIG.,is displayed. When &ldquo;Execution&rdquo; of automatic color calibration for use of a copying function is selected, the screen in FIG.,is displayed. When it is desired to use the copying function, a gradation calibration table used when the copying function is changed with reference to the deference data. When Print Start key in FIG.,is selected, a plurality of density gradation patterns corresponding to colors of YMCK as well as to a plurality of image quality mode such as characters and pictures are formed on a transfer material. The density gradation patterns are previously stored and set in a ROM of an IPU. A write value for a pattern is changed according to a result of detection of the development characteristics.

Image forming apparatus having decreased dislocation of toner images

An image forming apparatus has a transfer region located between a first belt and a second belt, which belts are respectively spanned and tensioned around a plurality of rollers. A total length of the first belt is substantially equal to integral multiples of a total length of the second belt. Certain portions of the belts are deformed via plastic deformation caused by contacting the plurality of rollers. The rollers are arranged so that deformed portions of the belts do not overlap each other in the transfer region.

Image forming apparatus which prevents image quality deterioration due

An electrophotographic image forming apparatus operable in a monochrome mode and color mode wherein toner images are sequentially formed on an image carrier by toner of a plurality of colors. The toner images of different colors are sequentially transferred to a single transfer member one above the other to complete a color image. In the color mode when toner of two or more colors are to be transferred to the transfer member one above the other, at least one of the color images on the image carrier is discharged before the transfer to the transfer member. In the monochrome mode the image is not discharged before transfer.

Image forming method and forming apparatus using the same

In an electrophotographic image forming apparatus, a toner images are sequentially formed on an image carrier by toner of a plurality of colors. The toner images of different colors are sequentially transferred to a single transfer member one above the other to complete a color image. When toner of two or more colors are to be transferred to the transfer member one above the other, at least one of the color images on the image carrier is discharged before the transfer to the transfer member.

Image forming method and apparatus which controls the discharging of

A picture design forming operation detects an adhering amount of toner by an optical sensor in an image forming apparatus. Image forming conditions are controlled on the basis of the detection result and a toner image is formed on a member. The toner image is then transferred to a transferring substance. The transferring substance is then attached to a picture design forming object and is sintered in this state. Further, a light absorbing material which has absorbency to light of a wavelength used in the optical sensor is contained in the toner, and resolves at least at a temperature of the sintering process.

Picture design forming system and method toner for forming an image,

An image forming apparatus in which a toner image formed on an image bearing member is first transferred onto an intermediate transfer element and then onto a transfer member. A potential of the image bearing member is detected and a transfer bias voltage applied to the intermediate transfer element is controlled according to the potential of the image bearing member. Undesired images such as transfer blurring due to discharge at the first transfer area, and a solid image scattering and so-called crow's claw mark due to increase of resistance of the transfer member under low absolute humidities are improved.

Color image forming apparatus having toner and transfer sheet bearing

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Yokohama, Japan

Takashi Bisaiji