Ricoh Company, Ltd.

Jnc Corporation

Naohito Shimota

Shinichiro Yagi

Hiroto Higuchi

Fumihiro Sasaki

Toshiki Nanya

Shigeru Emoto

Masami Tomita

Junichi Awamura

Tomoyuki Ichikawa

Hiroshi Yamada

Naohiro Watanabe

Hiroshi Yamashita

Tsuyoshi Sugimoto

Hiroaki Matsuda

Masaki Watanabe

Satoshi Mochizuki

Yasuaki Iwamoto

Shinya Nakayama

Tatsuya Niimi

Mitsuo Aoki

Yoshiki Yamaguchi

Hideki Sugiura

Koichi Sakata

Ryota Inoue

Osamu Uchinokura

Akihiro Kotsugai

Jun Okamoto

Masahide Yamada

Yasuo Asahina

Koji Suzuki

Yuji Suzuki

Hiroshi Nakai

Tadashi Kasai

Satoshi Kojima

Yutaka Takahashi

Maiko Kondo

Takahiro Honda

Tomomi Suzuki

Shinichi Wakamatsu

Tadao Takikawa

Tsuneyasu Nagatomo

Masana Shiba

Satoshi Ogawa

Tomomi Tamura

Tsunemi Sugiyama

Hisashi Nakajima

Masayuki Ishii

Akihiro Itoh

Akinori Saitoh

Masahiro Ohki

Shinji Ohtani

Kumi Hasegawa

Bing Shu

Tomoko Utsumi

Kazuyuki Hirai

Kazushige Yasumatsu

Mikio Yamahiro

Masanori Rimoto

Hiroshi Tateishi

Hyo Shu

Fumiaki Arai

Takayuki Koike

Shigeru Kusakata

Kazuyuki Yazaki

Akemi Sugiyama

Ryuta Chiba

Hitoshi Ueda

Kazuo Matsuda

Masahiro Koike

Kenya Itoh

Kazushige Sanyo Chemical Ind Ltd Yasumatsu

Kazuyuki Sanyo Chemical Industries Ltd Hirai

A method of manufacturing toner including melting, mixing, and kneading a releasing agent and a coloring agent with at least part of a polyester binder resin, and suspending and granulating an oil phase comprising the binder resin, the coloring agent, and the releasing agent in an aqueous medium.

Method of manufacturing toner and toner manufactured by the method

An electrostatic image developing toner including: a binder resin; a colorant; and a wax, wherein the intensity ratio of an absorbance at 2,850 cmderived from the wax to an absorbance at 828 cmderived from the binder resin, represented by 'absorbance derived from the wax/absorbance derived from the binder resin', is in the range of 0.1 to 0.5, where the absorbances are measured by FTIR-ATR, and the intensity ratio serves as a value for determining the amount of the wax present within 0.3 &#x3bc;m in depth from surfaces of particles of the toner after the toner has been heated to 140&#xb0; C. and then cooled, and wherein the toner has a storage elastic modulus of 5,000 Pa or greater at 140&#xb0; C.

Electrostatic image developing toner

To provide a toner A containing: base particles, each containing polyester, microcrystalline wax, and a colorant; and spherical silica particles having an average primary particle diameter of 100 nm to 150 nm, wherein the microcrystalline wax has an onset temperature of 45&#xb0; C. to 60&#xb0; C. as determined by DSC, and a carbon number distribution of 25 to 55.

Toner, method for forming toner, developer, and image forming method

A toner including at least one polyester resin serving as a binder resin, a colorant, a releasing agent, and a fixing aid, wherein the fixing aid includes a fatty acid amide-based compound, and the fatty acid amide-based compound is at least one of a fatty acid amide compound having a mono- or higher valent amide bond and a fatty acid amide-based compound having a mono- or higher valent amino group or a hydroxyl group.

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

A toner according to the present invention contains at least a polyester resin as a binder resin, a colorant, a releasing agent, a fixing-assisting component, and a fatty acid, wherein the fixing-assisting component has a melting point of 60&#xb0; C. to 120&#xb0; C. and contains at least one of an esterified compound obtained by esterification of the fatty acid and an amide compound obtained by amidation of the fatty acid.

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

Disclosed is a resin particle having a volume average particle diameter of 10 nm to 500 nm, obtained by polymerizing an addition polymerizable monomer containing a silsesquioxane (a) represented by Formula (I) or by copolymerizing the silsesquioxane (a) with an addition polymerizable monomer (b),  where Rto Reach independently represent a group selected from the group consisting of hydrogen, alkyl having 1 to 40 carbon atoms, substituted or unsubstituted aryl, and substituted or unsubstituted arylalkyl; any hydrogen in the alkyl group is optionally substituted by fluorine and any &#x2014;CH&#x2014; is optionally substituted by &#x2014;O&#x2014;, &#x2014;CH&#x2550;CH&#x2014;, cycloalkylene or cycloalkenylene; any hydrogen in alkylene in the arylalkyl group is optionally substituted by fluorine and any &#x2014;CH&#x2014; is optionally substituted by &#x2014;O&#x2014; or &#x2014;CH&#x2550;CH&#x2014;; and Arepresents an addition polymerizable functional group.

Resin particle, toner, and image forming method and process cartridge using the same

The present invention relates to toner compositions containing: toner particles made of: binder resin; colorant; and a wax which is dispersed in the toner particles, where the toner composition satisfies relationship (2): B&#x2266;394&#x2212;400A' when 0.950&#x3c;A&#x2032;&#x2266;0.965 (2) where A&#x2032; represents an average circularity of the toner composition, B represents a content of toner particles having a particle diameter not greater than 3 &#x3bc;m expressed in % by number, and a concentration of the wax at a surface of the toner particles is larger than a concentration thereof in the center of the toner particles.

Toner, developer and image forming apparatus

A toner, including a colorant; a binder resin; a release agent; and a fixing supplemental component, wherein the toner has a storage elastic modulus G' (Pa) satisfying the following conditions:5.0&#xd7;10&#x3c;G&#x2032;&#x3c;5.0&#xd7;10at 80&#xb0; C.1.0&#xd7;10&#x3c;G&#x2032;&#x3c;1.0&#xd7;10at 90&#xb0; C.5.0&#xd7;10&#x3c;G&#x2032;&#x3c;5.0&#xd7;10at 100&#xb0; C.1.0&#xd7;10&#x3c;G&#x2032;&#x3c;1.0&#xd7;10at 120&#xb0; C.1.0&#xd7;10&#x3c;G&#x2032;&#x3c;1.0&#xd7;10at 150&#xb0; C.

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

A magenta toner, produced by a method including suspending an oily liquid comprising a binder resin and a colorant in an aqueous medium, wherein the colorant comprises a naphthol pigment and a quinacridone pigment, and the quinacridone pigment comprises a pigment having a specific formula.

Magenta toner and developer

A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2):B&#x2266;14 when 155&#x3c;A&#x2266;180; and&#x2266;0.6&#x2212;79 when 145&#x2266;&#x2266;155,&#x2003;&#x2003;(1)wherein A represents a shape factor SF-1 of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 &#x3bc;m; andB&#x2266;14 when 0.920&#x2266;A'&#x2266;0.950; and&#x2266;394&#x2212;400&#x2032; when 0.950&#x3c;&#x2032;&#x2266;0.965&#x2003;&#x2003;(2)wherein A&#x2032; represents an average circularity of the toner composition and B represents a content of toner particles having a particle diameter not greater than 3 &#x3bc;m.

An image forming apparatus including an image bearing member; a charger; a light irradiator; a developing device; a transfer device; an image bearing member's cleaner; and a fixing device, wherein the fixing device includes a fixing member configured to fix a toner image upon application of heat and pressure thereto; a pressing member configured to press the recording material toward the fixing member; and a cleaning member configured to clean a surface of the fixing member and/or the pressing member, wherein the cleaning member has an outermost layer including a reactive material which increases viscoelasticity of a binder resin of the toner by reacting with the binder resin.

Fixing device, and image forming apparatus using the fixing device

To provide a toner containing an ethyl acetate-soluble polyester component and an ethyl acetate-insoluble polyester component, wherein the toner is granulated in an aqueous medium, the ethyl acetate-insoluble polyester component is obtained by elongating and/or cross-linking a modified polyester resin during granulating and/or after granulating, the modified polyester resin is produced by condensation polymerization of an acid component and at least one type of diol compound selected from aliphatic diol and alicyclic diol in the presence of a catalyst, and the mass average molecular weight of the modified polyester resin is 10,000 to 100,000.

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

A fixer fixing a toner including a binder resin and a colorant on a recording medium upon application of at least one of heat and pressure, including:

Fixer and image forming apparatus

A toner for developing a latent electrostatic image including a base of toner particle which contains a binder resin and a coloring agent, and an external additive. Herein, a plurality of the base of toner particle has a volume average particle diameter (Dv) of 3 &#x3bc;m to 7 &#x3bc;m, a ratio (Dv/Dn) of the volume average particle diameter (Dv) to a number average particle diameter (Dn) is 1.01 to 1.25, a plurality of the base of toner particle contains 15% by number or less of the base of toner particle having a particle diameter of 0.6 &#x3bc;m to 2.0 &#x3bc;m, a plurality of the base of toner particle has a circularity of 0.930 to 0.990 on average, the binder resin contains a modified polyester resin, and the toner contains 0.3 parts by weight to 5.0 parts by weight of the external additive, relative to 100 parts by weight of the base of toner particle.

Toner for developing latent electrostatic image, container having the same, developer using the same, process for developing using the same, image-forming process using the same, image-forming apparatus using the same, and image-forming process cartridge using the same

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

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Numazu, Japan

Naohito Shimota