Ricoh Company, Ltd.

Sony Corporation

Masami Tomita

Shigeru Emoto

Toshio Koike

Takeshi Shintani

Hiroshi Yamashita

Fumihiro Sasaki

Takeshi Uchitani

Hiroshi Yamada

Takao Takahashi

Hiroto Higuchi

Naohiro Kumagai

Hiroyuki Nagashima

Yuji Arai

Naohiro Watanabe

Ken Amemiya

Tomoyuki Ichikawa

Yasuaki Iwamoto

Hiroshi Ono

Chiaki Tanaka

Hideki Sugiura

Yutaka Takahashi

Shinya Nakayama

Koichi Sakata

Yohichiroh Watanabe

Satoru Inoue

Masanori Suzuki

Hiroshi Kobayashi

Hiroshi Hosokawa

Naoki Iwaya

Yoshiki Yamaguchi

Shin Hasegawa

Hiroaki Matsuda

Masahide Yamashita

Mitsuo Aoki

Hitoshi Iwatsuki

Koji Suzuki

Hideo Yoshizawa

Akira Shinshi

Takashi Fujita

Toshiki Nanya

Masanori Kawasumi

Shinichiro Yagi

Tsunemi Sugiyama

Masato Yanagida

Masashi Ohta

Taro Suito

Eisaku Murakami

Naohito Shimota

Atsushi Sampe

Maiko Kondo

Junichi Awamura

Yasuo Asahina

Takaaki Tawada

Tomomi Suzuki

Haruji Mizuishi

Takahiro Honda

Osamu Uchinokura

Hiroyuki Fushimi

Akihiro Kotsugai

Satoshi Mochizuki

Hisashi Nakajima

Takatsugu Fujishiro

Noboru Murabayashi

Masayuki Ishii

Yoshiyuki Kimura

Takuya Saito

Masahiko Satoh

Jun Okamoto

Kimitoshi Yamaguchi

Shinichi Kuramoto

Yoshiki Hozumi

Shinichi Kawahara

Takaya Muraishi

Keiko Shiraishi

Minoru Masuda

Satoshi Takano

Yukimichi Someya

Satoshi Hatori

Hisashi Kikuchi

Hitoshi Ishibashi

Yoshio Hattori

Kousuke Suzuki

Eiji Kurimoto

Kaoru Yoshino

Toshihiko Baba

Katsuhiro Echigo

Atsushi Nakafuji

Takeo Suda

Nobuo Kuwabara

Shigeo Kurotaka

Hideki Zemba

Shuji Tanaka

Akira Fujimori

Hiroyuki Kunii

Naoki Iwata

Shigekazu Enoki

Yoshiaki Kawasaki

Kohji Ue

A cleaning roller cleaning a surface of a cleaning component, wherein the cleaning roller is provided in a roller configuration having a cylindrical shape and has a portion in contact with the cleaning component, the portion being made of a melamine resin foam having a continuous foam structure, the melamine resin foam being provided by heating compression from an original configuration in a radial direction, and wherein the portion in contact with the cleaning component has a continuous foam structure and a tensile strength in a range of 1.7&#xb1;0.5 kg/cm, and an image forming apparatus incorporating the same.

Charging device, process cartridge, image forming apparatus, and toner

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 method for producing a toner is provided that comprises a kneading step, a milling step, a pre-externally adding step, in which at least a part of an external additive is externally added to the powder to prepare a mixture, a classifying step, a recycle step, and a post-externally adding step,

Method for producing toner and resulting toner

A toner composition including toner particles, wherein the toner particles are prepared by a method in which toner constituents including at least a binder resin and a colorant are kneaded upon application of heat to prepare a toner constituent mixture; the toner constituent mixture is dissolved or swelled in an organic solvent capable of dissolving or swelling at least the binder resin to prepare an oil phase liquid; the oil phase liquid is emulsified in an aqueous liquid to prepare an emulsion; the emulsion is coagulated; and then the coagulated emulsion is dried to prepare the toner particles.

Toner composition and method for manufacturing the toner composition

A video signal display system includes: a reproducing apparatus including a decoder that decodes input video data to produce a video signal, an IP converter that, when the video signal produced by the decoder is an interlaced video signal, converts the interlaced video signal into a progressive video signal, a pseudo-interlacing unit that performs pseudo-interlacing in which the progressive video signal converted by the IP converter undergoes pseudo-interlacing so that the progressive video signal is converted into a pseudo-interlaced signal, and a first controller; and a display apparatus including a display processor that carries out a display process for displaying a video signal, and a display that can at least display the video signal that has undergone the display process in the display processor.

Video signal display system, video signal reproducing apparatus, and video signal display method

A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 &#x3bc;m to 10.0 &#x3bc;m and a ratio Dv/Dn within a range of 1.00 to 1.40, in which Dv represents a volume average particle diameter and Dn represents a number average particle diameter,Ti(&#x2014;X)m(&#x2014;OH)n&#x2003;&#x2003;General Formula (I)O&#x2550;Ti(&#x2014;X)p(&#x2014;OR)q&#x2003;&#x2003;General Formula (II) in General Formulas (I) and (II), X represents a residue of a mono-alkanolamine of 2 to 12 carbon atoms or a polyalkanolamine from which a hydrogen atom of one hydroxyl group is removed; other hydroxyl group(s) and still other hydroxyl group(s), within the polyalkanolamine molecule that has a directly bonding Ti atom, may polycondense to form a ring structure; other hydroxyl group(s) and still other hydroxyl group(s) may polycondense intermolecularly to form a repeating structure; and the polymerization degree is 2 to 5 in a case of forming the repeating structure; R represents one of a hydrogen atom and alkyl groups of 1 to 8 carbon atoms that may have 1 to 3 ether bonds; 'm' is an integer of 1 to 4; 'n' is an integer of 0 to 3; the sum of &#x201c;m&#x201d; and &#x201c;n&#x201d; is 4; &#x201c;p&#x201d; is an integer of 1 or 2; &#x201c;q&#x201d; is an integer of 0 or 1; the sum of &#x201c;p&#x201d; and &#x201c;q&#x201d; is 2; and in a case that &#x201c;m&#x201d; and &#x201c;p&#x201d; is 2 or more, the respective Xs may be identical or different each other.

Electrostatic image developing toner, toner kit and image forming apparatus

The present invention provides a charging device which comprises a charging roller () and a cleaning component (). The charging roller charges a surface of an image-recording medium () with a voltage which is applied from an external source. The cleaning component cleans a surface of the charging roller. The charging roller includes a resistance adjustment layer which is made of a resin composite and formed on an outer periphery of a core metal. The hardness of the charging roller is 45 degrees or more in JIS D hardness. The cleaning component has a portion which is in contact with the charging roller. This portion is made of resin foam which has a continuous foam structure. The density of the resin foam is 5 to 15 kg/mand its tensile strength is 1.7&#xb1;0.5 kg/cm.

A dry toner for developing an electrostatic image, including a toner binder containing a urea-modified polyester. The toner has an average sphericity of 0.96 or more and contains no more than 30% by weight of particles having a sphericity of less than 0.95.

Dry toner and method of preparing same

An image forming apparatus including an image bearing member, a charging device, an irradiating device, a developing device, a transfer device, a fixing device, and a cleaning device, wherein the image bearing member includes a substrate on which a photosensitive layer and a cross-linked surface layer are accumulated and the cross-linked surface layer comprises a cross-linked material formed by curing a monomer having at least three radical polymerizable function groups without a charge transport structure and a radical polymerizable compound having a charge transport structure by a photo-energy irradiation device, wherein the toner has a volume average particle diameter of from 1 to 5 &#x3bc;m and an average circularity of from 0.95 to 0.98, wherein external additives added to the toner satisfy the following relationship: 1&#x3c;3X/5+Y&#x3c;3, wherein X represents the amount of an external additive having a primary particle diameter of from 10 to 20 nm and Y represents the amount of another external additive having an primary particle diameter of from 100 to 200 nm and X and Y satisfy the following relationship: X&#x3c;Y, 0&#x3c;X&#x2266;1 and 1&#x2266;Y, and wherein the cleaning device includes a cleaning blade made of a polyurethane rubber plate having a hardness of from 70 to 80&#xb0;, and a rebound resilience of from 10 to 35% at 25&#xb0; C.

Image forming apparatus, image forming method and process cartridge

In an image forming apparatus, an area applied with a lubricant, i.e., an area of a lubricant layer having a uniform thickness, is obtained by spreading the lubricant by a lubricant smoothing blade. The area applied with a lubricant covers an area cleaned by a cleaning blade, i.e., a contact portion of the cleaning blade with a photoconductor.

Image forming apparatus, lubricant applying device, transfer device, process cartridge, and toner

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.

Provided is an electrostatic image developing toner excellent in blocking resistance at high temperature and humidity, as well as in low temperature-fixing property, having a polyester resin toner binder. Provided is the electrostatic image developing toner containing at least one noncrystalline polyester resin and a crystalline polyester resin, wherein the polyester resins are formed in the presence of at least one titanium-containing catalyst expressed in the following Formulas:Ti(&#x2014;X)(&#x2014;OH)O&#x2550;Ti(&#x2014;X)(&#x2014;OR)

Electrostatic image developing toner and image forming apparatus using the same

A developer for an electrophotographic tandem image forming method is provided that contains a toner; and a carrier, wherein the toner has a shape factor SF-1 of from 120 to 160, an average circularity of form 0.93 to 0.98, a weight-average particle diameter (D4) of from 3.0 to 8.0 &#x3bc;m, and a ratio (D4/Dn) of the weight-average particle diameter (D4) to a number-average particle diameter (Dn) of from 1.01 to 1.20, and wherein the carrier is almost a spherical ferrite coated with a resin wherein alumina is dispersed, which has an average particle diameter of from 20 to 45 &#x3bc;m and the following formula:(MgO)x(MnO)y(FeO)zwherein x is from 1 to 5 mol %, y is from 5 to 55 mol % and z is from 45 to 55 mol %.

Developer, and image forming method using the developer

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

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Numazu, Japan

Masami Tomita