Ricoh Company, Ltd.

Tomoko Utsumi

Tomoyuki Ichikawa

Shinya Nakayama

Hideki Sugiura

Satoshi Mochizuki

Yasuo Asahina

Akihiro Kotsugai

Masami Tomita

Hiroshi Yamada

Yasuaki Iwamoto

Koichi Sakata

Hisashi Nakajima

Osamu Uchinokura

Masayuki Ishii

Kazuhiko Umemura

Hitoshi Iwatsuki

Minoru Masuda

Hiroto Higuchi

Shigeru Emoto

Fumihiro Sasaki

Junichi Awamura

Shinichiro Yagi

Toshiki Nanya

Naohito Shimota

Takahiro Honda

Tomomi Suzuki

Kohichi Sakata

Mitsuo Aoki

Kumi Hasegawa

Hyo Shu

Emi Machida

Kota Ogasawara

Naohito Bell Shine Takehara A-103 Shimota

Tomoyuki Dai6 Sumika Bldg 206 Ichikawa

Koichi Takashimahoncho M's 503 Sakata

Shinya Grand River Ave 201 Nakayama

Masami Pasco Grand Mansion Shinnumazu 302 Tomita

Shinya Grand River A 201 Nakayama

Shinya Gran River Avenue 201 Nakayama

A server apparatus is communicably connected to multiple information processing devices and is configured to manage a session in which content data are transmitted and received between the multiple information processing devices. A communication management unit is configured to manage a connection to the session by each of the information processing devices. An information management unit is configured to receive a request from at least one of the information processing devices and to associate collateral information about an environment with the session. An information transmission unit is configured to transmit the collateral information to the at least one of the information processing devices.

Server apparatus, communication system and communication method

The object of the invention is to provide a toner enabling excellent transferring properties, cleanability, and fixability and forming a high-precision image without substantially degraded image quality even after printed on a number of sheets of paper. The invention also provides the toner-production method, an image forming apparatus, an image forming method, and a process cartridge. To this end, the present invention provides a toner which comprises toner-base particles containing a binder resin and a filler, and inorganic fine particles, in which the filler is included in a filler-layer in the vicinity of surfaces of the toner-base particles, the number average particle diameter of the primary particles of the inorganic fine particles is 90 nm to 300 nm, and the average circularity of the toner is 0.95.

Toner and production method thereof, image forming apparatus and image forming method, and process cartridge

A toner including toner particles including a binder resin, a colorant, and an inorganic particulate material present on a surface of the toner particles. The toner particles have a surface roughness (Ra) of from 1 to 30 nm, a standard deviation of the surface roughness of from 10 to 90 nm and include 1 to 20 convexities per 1 &#x3bc;m, which have a height not less than 10 nm.

Toner, developer, image developer and image forming apparatus

A toner including a binder resin; and a colorant, wherein a hexafluoroisopropanol (HFIP)-soluble component satisfies the following relationship:2,000 &#x2266;Mn &#x2266;7,000 and 1.5 &#x2266;Mn/Mw &#x2266;10

Toner, developer, image forming apparatus and image forming method

To provide a toner that can provide long-term removability and high-definition images with reduced image layer thickness and densely-packed toner particles, a developer capable of forming high-quality images using the toner, a toner container for containing the toner, a process cartridge using the toner, an image forming apparatus using the toner, and an image forming method using the toner. The toner of the present invention is a toner having a substantially spherical shape with irregularities on its surface and containing at least a binder resin and a colorant, wherein a surface factor SF-1 that represents the sphericity of toner particles is 105 to 180, a surface factor SF-2 that represents the degree of surface irregularities of the toner particles is correlated with the volume-average diameter of the toner particles, and the toner particles have an inorganic oxide particle-containing layer within 1 &#x3bc;m from their surfaces.

Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method

A toner which includes a toner material, wherein the toner satisfies the following formula:0&#xb0; C.&#x2266;&#x394;Tm&#x2266;20&#xb0; C.

Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method

The object is to provide a toner which can be smoothly replenished by a toner replenishing device using a powder pump even when the toner contains a releasing agent, and an image forming apparatus using the toner. There is provided a toner, which comprises a binder resin, a colorant and a releasing agent, has a dynamic friction coefficient of 0.15 to 0.35, and is replenished by the toner replenishing device having a powder pump configured to automatically supply the toner and a toner container arranged in conjunction with the powder pump so as to develop a latent electrostatic image on a image bearing member.

Toner, image forming apparatus using the same and process cartridge

An image forming method including: forming a toner image on a support using a toner including toner particles; and feeding the support bearing the toner image thereon through a nip between an endless toner heating member and a pressure roller to fix the toner image on the support, wherein the endless toner heating member is rotated while stretched by a fixing roller and a heat roller which includes a magnetic metal and which is heated by electromagnetic induction, and wherein the pressure roller presses the support to the endless toner heating member and the fixing roller at the nip, wherein the toner particles are prepared by a polymerizing method using a binder resin containing at least a modified polyester resin.

Image forming method using toner

A toner which includes a toner material, wherein the toner satisfies the following formula:0&#xb0; C.&#x2266;&#x394;Tm&#x2266;20&#xb0; C.where &#x394;Tm represents Tma (&#xb0; C.)&#x2212;Tmb (&#xb0; C.), Tma (&#xb0; C.) is &#xbd; flown-out temperature of the toner by a capillary type flow tester, and Tmb (&#xb0; C.) is &#xbd; flown-out temperature of a melt kneaded mixture of the toner by the capillary type flow tester, and wherein Tma is from 130&#xb0; C. to 200&#xb0; C.

A toner for developing an electrostatic image, includes: a colorant; and a binder resin. The toner has a particle including at least one pore having a diameter of 10 nm or over, and a porosity thereof is in a range from 0.01 to 0.60.

Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of toner

To provide a toner that can provide long-term removability and high-definition images with reduced image layer thickness and densely-packed toner particles, a developer capable of forming high-quality images using the toner, a toner container for containing the toner, a process cartridge using the toner, an image forming apparatus using the toner, and an image forming method using the toner. The toner of the present invention is a toner having a substantially spherical shape with irregularities on its surface and containing at least a binder resin and a colorant, wherein a surface factor SF-that represents the sphericity of toner particles is 105 to 180, a surface factor SF-that represents the degree of surface irregularities of the toner particles is correlated with the volume-average diameter of the toner particles, and the toner particles have an inorganic oxide particle-containing layer within 1 &#x3bc;m from their surfaces.

The object of the present invention is to provide a toner which has sufficiently high chargeability and less toner spent to a carrier or the like even when several tens of thousands of image sheets are output, is capable of keeping high-charge property and flowability without causing substantial background smear or toner fogging, excels in low-temperature fixing property and hot-offset property, and has a wide range of fixing temperature as well as to provide a developer, an image forming apparatus, a process cartridge, and an image forming method using the toner for developing electrostatic images. The toner of the present invention comprises a colorant, and a resin, and a fluoride compound, in which the fluoride compound exists on the surfaces of toner particles, and the atomic number ratio (F/C) of fluoride atoms to carbon atoms existing on the surfaces of the toner particles is 0.010 to 0.054.

Toner for developing electrostatic images, developer, image forming method, and image forming apparatus

The object of the present invention is to provide a developer having a sharp charge amount distribution and bringing out high-quality image without substantially smearing a charging unit, developing units, a photoconductor, and an intermediate transferring member by the developer, namely, a developer capable of providing an appropriate image density and exhibiting extremely little background smear even when used over a long period of time and repeatedly used for a number of sheets of paper as well as to provide an image forming apparatus for electrophotography using the developer.

Toner for electrophotography and image forming apparatus

A toner for electrophotography contains a binder resin, a colorant and a releasing agent and has a viscosity, a storage modulus (G') and a loss modulus (G&#x2033;), in which the viscosity is 1&#xd7;10Pa&#xb7;s or more and a loss tangent (tan &#x3b4;) as the ratio of G&#x2032; to G&#x2033; is 0.4 or more at temperatures from 140&#xb0; C. to 170&#xb0; C.

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Ebina, Japan

Tomoko Utsumi