Konica Corporation

Konica Minolta Business Technologies, Inc.

Konishiroku Photo Industry Co., Ltd.

Konica Minolta Technosearch Co., Ltd.

Meizo Shirose

Hiroshi Yamazaki

Tatsuya Nagase

Asao Matsushima

Hiroyuki Yamada

Hiroyuki Takagiwa

Yoshiki Nishimori

Michiaki Ishikawa

Kaori Soeda

Jiro Takahashi

Naohiro Hirose

Masafumi Uchida

Shigenori Kouno

Ken Ohmura

Yoshiaki Kobayashi

Shiro Hirano

Ryuji Kitani

Keiko Ogawa

Tomoyasu Umeno

Kazuya Isobe

Kenji Hayashi

Akihiko Itami

Mikio Koyama

Satoshi Uchino

Akitoshi Matsubara

Hiroyuki Kozuru

Yoshiyasu Matsumoto

Kazuo Yasuda

Makoto Nomiya

Tadashi Kaneko

Tomoko Tanma

Hiroya Masaki

Shoichiro Ishibashi

Shigenori Kohno

Masakazu Fukuchi

Masashi Saito

Hiroyuki Tokimatsu

Tomomi Oshiba

Shinya Obara

Hiroyuki Yasukawa

Kunio Ito

Takao Yamanouchi

Tatsuya Fujisaki

Hajime Tadokoro

Akira Ohira

Kishio Tamura

Tsuyoshi Uchida

Hiroshi Tsuchiya

Takahira Kasuya

Yoko Yamamoto

Kenichi Kishi

Kiyoshi Tamaki

Kunio Akimoto

Kazuhiko Uneme

Ken-ichi Kishi

Kenzi Tuzita

Kazuhisa Horiuchi

Kouichi Gunzi

Tsugio Abe

Megumi Seki

Kazuhisa Horiuch

Haruji Kojima

Toru Shoji

Yoshiaki Kobayahi

Keiko Ujihara

Naomi Inaba

A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 74, C.I. Pigment Yellow 139, C.I. Pigment Yellow 155, C.I. Pigment Yellow 180 and C.I. Pigment Yellow 185; the magenta toner comprises toner particles containing a dye represented by Formula (X-1) and a metal compound represented by Formula (1); and the cyan toner comprises toner particles containing a silicon phthalocyanine represented by Formula (2): 

Electrophotographic toner

An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon having at least one of a branched chain structure and a cyclic structure; and the colorant comprises a silicon phthalocyanine represented by Formula (I): 

Electrostatic latent image developing toner and method of image forming

A developing roller that can form a toner image with high quality includes: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.

Developing roller

The present invention provides an intermediate transfer belt allowing formation of a high-quality toner image. The present invention relates to an intermediate transfer belt having at least one resin layer that is wound around at least a pair of supporting shafts, for receiving a toner image transferred from a photosensitive member, the resin layer comprising a carbon black dispersed in a base resin material, the carbon black having a number-average particle size of Feret's diameter of 5 to 300 nm and containing primary particles in an amount of 5% or more on a number basis.

Intermediate transfer belt for image-forming apparatuses

Disclosed is a method for forming color image, in which one of the yellow, magenta, cyan and black toners is a high water content toner, and one of the yellow, magenta, cyan and black toners is a toner low water content toner, water content of the high water content toner is 1.2 to 2.5% by weight based on the high water content toner, and water content of the low water content toner is 0.1 to 1.2% by weight based on the low water content toner.

Image forming method

An embodiment may be an image forming method, which comprises forming a latent image on an image carrier; developing the latent image with a toner to form a toner image on the image carrier; transferring the toner image; and applying ultrasonic vibration at one of the developing step and the transferring step. The toner comprises a resin particle and a release agent particle having a melting point in a range of 40 to 75&#xb0; C. and the toner has Dp50 of 3.0 to 5.0 &#x3bc;m.

A toner including toner particles each containing a resin and a colorant, wherein the toner particle has:

Toner, manufacturing method thereof and image forming method

An image forming method, comprising: a step of forming a toner image on a image carrying member; and a step of transferring the toner image from the image carrying member to a transfer member, wherein toner forming the toner image has a volume-basis median diameter of 3.0 to 5.0 &#x3bc;m, contains a releasing agent with a melting point in the range of from 40&#xb0; C. to 75&#xb0; C., and is added with a lubricant.

A toner is disclosed, comprising a resin (A), a colorant (B) and an alkylidenecarboxylic acid (C).

Toner and method of manufacturing the toner

Toner containing binder resin constituted of plural types of copolymers comprising a vinyl type polymerizing monomer, wherein at least one of the copolymers comprising a vinyl type polymerizing monomer is one formed by utilizing a monomer provided with at least two polar groups.

Toner and manufacturing method of the same

A toner for electrostatic latent image development contains a toner particle having a median diameter (d50) in number standard of 2.5 &#x3bc;m to 7.5 &#x3bc;m, acrylate of less than 12 ppm and aliphatic alcohol of 4 to 12 carbons of 40 ppm to 300 ppm.

Toner for electrostatic latent image development and manufacturing method of the toner for electrostatic latent image development

An image forming method comprising: developing an electrostatic latent image on a latent image carrier with toner to form a toner image, transferring the toner image; and using ultrasonic vibration in the developing step or in the transferring step is disclosed. The toner includes toner particles that contain a releasing agent having a melting point 40-75&#xb0; C., and has a number-based median diameter D50 of 3.0 to 5.0 &#x3bc;m and a CV value of 12 to 20% in a number-based particle size distribution and/or a mean circularity of 0.975-1.000.

A toner for developing an electrostatic image is disclosed. The arithmetic average of shape coefficient SF-1 of the toner particles calculated by Equation 1 is from 125 to 170 and a ratio of that to an arithmetic average of the shape coefficient SF-2 of the toner particles calculated by Equation 2, SF-1/SF-2, is from 1.10 to 1.52 and the ratio of the toner particles having a circle corresponding diameter measured by a flow particle image analyzer of from not less than 0.60 to less than 1.00 &#x3bc;m is not more than 5.0% in number. The image forming methods employing the toner are also disclosed.

Toner for forming electrostatic image

An image forming method for forming a full color toner image by overlaying four color electrostatic image developing toners of black, yellow, magenta and cyan, wherein at least one of the four color electrostatic image developing toners is a toner containing a large diameter external additive in a larger amount and at least one is a toner containing the large diameter external additive in a smaller amount, in which the primary particle diameter of the large diameter external additive is from 150 nm to 2,000 nm, the content of the large diameter external additive in the toner containing the large diameter external additive in larger amount is from 0.06% by weight to 4.0% by weight and the content of the large diameter external additive in the toner containing the large diameter external additive in the smaller amount is not more than 0.05% by weight.

An image forming method comprising the step of transferring a toner image while applying vibration by ultrasonic wave where in the toner particle forming the toner image has a sea-island structure containing at least two islands of a releasing agent, and the average of the nearest distance between the islands is from approximately 100 nm to approximately 1060 nm and the number of the island having the nearest wall distance of not less than 1300 nm is not more than 10% of the whole number of the islands contained in the toner particle.

Image forming method employing the toner

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Hachioji, Japan

Meizo Shirose