Minolta Company, Ltd.

Konica Minolta, Inc.

Minolta Camera Kabushiki Kaisha

Hiroyuki Fukuda

Masahiro Anno

Katsunori Kurose

Chikara Tsutsui

Minoru Nakamura

Masayuki Hagi

Takeshi Arai

Junichi Tamaoki

Tetsuo Sano

Yoshitaka Sekiguchi

Kenichi Kido

Yoshihiro Mikuriya

Hideaki Yasunaga

Ichiro Demizu

Makoto Kobayashi

Tomoharu Nishikawa

Koichi Takenaka

Yoshikazu Nishihara

Asao Matsushima

Shiro Hirano

Mikio Kouyama

Toshitaro Kohri

Hitoshi Kato

Mikihiko Sukeno

Yoshitsugu Morita

Haruhiko Furukawa

Hiroshi Ueki

Hiroshi Fukao

Choichiro Tanigawa

Miyoko Goto

Yoko Osawa

Senyu Taira

Satoru Iwata

Fumiko Hirano

Hideaki Tsukamoto

Masao Nakajima

Junju Machida

A method of manufacturing an electrostatic latent image developing toner made of a binding resin made of an amorphous resin and a crystalline resin, and toner particles containing a releasing agent and a coloring agent, the method includes: adding a monomer for forming the amorphous resin, in an aqueous medium, under presence of the fine particles containing the crystalline resin, and performing polymerization to obtain coated resin fine particles that are fine particles containing the crystalline resin, the fine particles being coated with the amorphous resin; and flocculating and fusing at least fine particles containing the amorphous resin, the coated resin fine particles, and fine particles containing the coloring agent, in an aqueous medium, under presence of a flocculating agent, to obtain the toner particles, wherein a surfactant having concentration of one to five times critical micellar concentration is added to the aqueous medium in the polymerization.

Method of manufacturing electrostatic latent image developing toner

The toner according to the present invention is used for electrostatic latent image development, and has toner particles containing a binder resin, a colorant and a release agent. The binder resin is composed of a non-crystalline resin and a crystalline resin. The toner satisfies the relationship represented by specific expressions specified by the endothermic property of the crystalline resin, the endothermic property of the toner and the content ratio of the binder resin in the toner particles.

Toner and process for producing the same

A toner is provided for developing an electrostatic image which has relatively high roundness, uniform shape, excellent property of electrification, electrification stability, maintenance of heat resistance, fixability, image quality and productivity, and is effective for full-color image formation, cleanerless system and toner-recycling system. The toner comprises toner particles containing a binder resin (A), a polymer (B) and a colorant, the polymer (B) having weight-average molecular weight of 1000-3000 and a ratio of weight-average molecular weight/number-average molecular weight of not more than 2.0, wherein the polymer (B) particles exist on surfaces of the toner particles.

Toner for developing an electrostatic image

Toner set and full-color image-forming method suitable for use of the toner set

A production method of toner particles has steps of mixing a binder resin and a colorant, melting and kneading the mixture, pulverizing the kneaded material, and classifying the pulverized materials to give a colored resin particles. Then the colored resin particles are mixed with silica particles having an average primary particle size of 16 to 28 nm with the number of particles (A) that are less than 15 nm in particle size, the number of particles (B) that are between 15 and 30 nm in particle size and the number of particles (C) that are larger than 30 nm in particle size having the relation of (B)/(A)>4 and (B)/(C)>4. To obtain toner particles, the resultant mixture is heat-treated to make the colored resin particles spherical and to make the silica particles fixed on the surface of the colored resin particles.

Production method of toner

A method for manufacturing an electrophotographic toner having a mean particle diameter of more than 5 &mgr;m and less than 10 &mgr;m. For manufacturing the above size of toner, coarsely pulverized particles are pulverized to medium pulverized particles having a mean particle diameter of more than 10 &mgr;m and not more than 19 &mgr;m at first. Subsequently, the medium pulverized particles are further pulverized to small diameter particles having a mean particle diameter of more than 5 &mgr;m and less than 10 &mgr;m, and thereafter the small diameter particles are classified by a rotor type classifier.

Method for manufacturing an electrophotographic toner

The present invention relates to a negatively chargeable toner comprising fine toner particles which contain a thermoplastic resin, a colorant, and a specified compound; the toner externally admixed with inorganic fine particles which have been treated with a hydrophobicizer and a silane coupling agent having a cationic group and/or a silicone oil having a cationic group, and which have a blow-off charge quantity (Q) of &minus;800<Q<0 &mgr;C/g relative to iron oxide particles.

Negatively chargeable toner and developing device using thereof

Non-magnetic toner for developing electrostatic latent image

The present invention relates to a non-magnetic yellow toner for use in full-color image forming apparatuses, such as full-color electrostatic copying machines and full-color laser beam printers, comprising:

Non-magnetic yellow toner

The present invention relates to a binder carrier comprising at least magnetic particles and a binder resin. The binder resin contains a thermoplastic silicone-modified acrylic resin which is a copolymer of a polydiorgano-siloxane macromer having an acrylic functional group and a radical-polymerizable organic monomer. The binder carrier of the present invention a long-life binder carrier which eliminates the possibility of carrier deterioration due to toner components, such as a charge-controlling agent and an after-treatment agent, and which is less liable to deteriorate in its chargeability.

Binder carrier

The present invention relates to a binder carrier, comprising at least magnetic particles and a binder resin, characterized in that the binder resin comprises a thermoplastic silicone-modified acrylic resin and an amino-group-containing resin. The binder carrier is capable of preventing carrier degradation caused by toner ingredients such as a charge-control agent and a post-processing agent for the toner. The binder carrier of the present invention has a long life with less susceptibility to degradation in charging performance, and makes it possible to quickly charge the toner sufficiently.

Binder carrier comprising magnetic particles and specific resin

The present invention relates to developer comprising a toner and/or a carrier;

Developer comprising toner and/or carrier having specified average

The present invention provides a mono-component developing method comprising the steps of: supplying a mono-component developer containing a toner particles having an average shape factor (SF value) of 100 to 150 to a developer transporting member;

Mono-component developing method and mono-component developing machine

A mono-component developing method, comprising the steps of:

Mono-component developing method

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Kobe, Japan

Hiroyuki Fukuda