Konica Minolta, Inc.

Sony Corporation

Koninklijke Philips Corporation N.v.

Konica Minolta Business Technologies, Inc.

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Kosuke Nakamura

Satoshi Uchino

Yasuaki Maeda

Hiroyuki Kozuru

Yoshiyasu Matsumoto

Toshiyuki Nakagawa

Tatsuya Narahara

Gijsbert Joseph Van Den Enden

Kornelis A Schouhamer Immink

Josephus A H M Kahlman

Yoshihide Shinpuku

Koji Shibata

Hideki Nagashima

Futoshi Kadonome

Takanari Kayamori

Tsutomu Harada

Tatsuya Nagase

Shinichi Hamaguchi

Tomomi Oshiba

Shinya Obara

Tomoko Mine

Okushi Okuyama

Saburou Hiraoka

Junya Ueda

Mikihiko Sukeno

Hitomi Motani

Hidehito Haruki

Taichi Tateishi

Yoshiaki Miyamoto

Toshio Tsukamoto

Toshiyuki Hokazono

A toner container information acquiring method includes: measuring a toner amount contained in a resin forming a toner container; and acquiring information regarding mechanical strength of the toner container based on the measured toner amount.

Toner container information acquiring method, toner container sorting method, toner container pulverizing method, toner container processing method, and toner container manufacturing method

Provided is a carrier for electrostatic charge image development which provides a two-component developer having a high electric charge amount, a suppressed variation in an electric charge amount caused by an environmental change, and excellent durability, even if a low temperature fixable toner is used. A carrier for electrostatic charge image development of the present invention includes: carrier particles in which a core particle surface is coated with a coating material containing a resin, wherein the coating material contains phosphorus element, and the resin contains structural units derived from an alicyclic (meth)acrylic acid ester compound.

Carrier for electrostatic charge image development and two-component developer for electrostatic charge image development

A toner for developing an electrostatic latent image includes: toner base particles containing a hybrid crystalline polyester resin having a crystalline polyester polymerized segment and an amorphous polymerized segment chemically bonded to each other and an amorphous resin; and an external additive including fatty acid metal salt particles, wherein a volume median diameter of the fatty acid metal salt particles is from 3.0 to 5.0 &#x3bc;m.

Toner for developing electrostatic latent image

Provided is a method for producing a carrier for developing an electrostatic latent image, the carrier including carrier particles each including a core particle with a surface coated with a coating material including a resin, and the method including the steps of: a) obtaining first coating resin particles by polymerizing an alicyclic methacrylate monomer using, as a polymerization initiator, an azo compound having a nitrogen atom-containing substituent; b) obtaining second coating resin particles by polymerizing an alicyclic methacrylate monomer using a persulfate as a polymerization initiator; and c) forming carrier particles by coating surfaces of core particles with a coating material obtained by mixing at least the first and second coating resin particles.

Method for producing carrier for developing electrostatic latent image and method for producing two-component developer

A process of forming an image includes the steps of: developing an electrostatic latent image with a toner, the latent image being formed through charge of the surface of an electrostatic latent image carrier and exposure of the surface to light; and applying a lubricant onto the surface of the electrostatic latent image carrier. The toner includes a toner matrix particle and an external additive nanoparticle. The external additive nanoparticle comprises a silica-polymer composite nanoparticle. A percentage of atomic silicon present on the surface of the silica-polymer composite nanoparticle satisfies Condition A expressed by Expression: 15.0 atm %&#x2266;percentage of atomic silicon ({Si/(C+O+Si)}&#xd7;100)&#x2266;30.0 atm %. The percentage of atomic silicon is determined from total amounts of atomic carbon, oxygen, and silicon present on the topmost surface of the silica-polymer composite nanoparticle and within 3 nm inwards from the topmost surface.

Image forming process

Disclosed is a two-component developer containing toner particles and carrier particles. The number-average particle diameter of the toner particles MDt ranges from 3.5 to 5.0 &#x3bc;m. The MDt of the toner particles and the volume-average particle diameter of the carrier particles MDc are at a specific ratio, and spherical fine toner particles in the toner particles and fine carrier particles in the carrier particles exist at specific percentages.

Two-component developer

A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.

Two-component developing agent for developing electrostatic latent image and method for forming electrophotographic image

A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95.

Developing device with developer replenishment

A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65.

Developing device and image forming apparatus

A two-component developing agent includes toner and a carrier including carrier particles. The toner includes a binding resin. The carrier particle includes a porous ferrite core particle and a resin covering layer. The resin covering layer covers the porous ferrite core particle. The resin covering layer includes ferrite particles. An average particle diameter of the ferrite particles ranges from 0.1 to 1.0 &#x3bc;m.

Two-component developing agent and developing method

A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.

Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pore apertures on a surface of the particle, and the method comprises steps of blocking the pore apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore apertures have been blocked, and mixing the resin coated carrier and the toner.

Production method of two-component developer

Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D) of from 3.0 to 8.0 &#x3bc;m, the small particles (B) have an average circularity of from 0.70 to 0.92 and a number-based median diameter (D) of from 0.15 to 0.60 times that of the toner particles (A), and the surface energy of the toner particles (A) is different from that of the small particles (B).

Toner

A communication system, reception apparatus and method, recording medium and program are provided. A technique is provided wherein, even where means for synchronizing a reception clock with a transmission clock is not available, data transmitted can be received accurately with a high transmission capacity assured. The frequency of a transmission clock used by an apparatus of the sender side of data is set equal to that of a reception frequency used by an apparatus on the receiver side. If a sampling timing and a changing point of the value of transmission data do not coincide with each other, then the value of 1 or 0 of a noticed bit is decided from a sample value. However, if they coincide with each other, then the sample value assumes an intermediate value different from 1 and 0, and the value of the noticed bit is decided as a value opposite to the value of the immediately preceding bit.

Communication system, reception apparatus and method, recording medium and program

A DSV control bit determining/inserting unitinserts DSV control bits for execution of DSV control into an input data string and outputs the data string including the DSV control bits to a modulation unitThe modulation unitconverts the data string with a basic data length of 2 bits into variable length code with a basic code length of 3 bits in accordance with a conversion table and outputs the code resulting from the conversion to a NRZI encoding unitThe conversion table used by the modulation unitincludes substitution codes for limiting the number of consecutive appearances of a minimum run to a predetermined value and substitution codes for keeping a run length limit. In addition, the conversion table enforces a conversion rule, according to which the remainder of division of the 'count of an element in a data string by 2 having a value of 0 or 1 shall always be equal to the remainder of division of the '1' count of an element in the code resulting from conversion of the data string by 2.

Growing community of inventors

Tokyo, Japan

Kosuke Nakamura