Konica Minolta Business Technologies, Inc.

Konishiroku Photo Industry Co., Ltd.

Konica Corporation

Konica-minolta Holdings, Inc.

Masao Asano

Hiroshi Yamazaki

Akihiko Itami

Tomoe Kitani

Nobuaki Kobayashi

Kazuhisa Shida

Yuzuru Sato

Takao Abe

Mikio Koyama

Hirofumi Hayata

Tomoo Sakimura

Shigeki Takenouchi

Sadatugu Terada

Masao Ishihara

Yasuhisa Yamauchi

Kazumasa Matsumoto

Kageyuki Tomoyori

Hiroyuki Yamada

Kunihiro Koshizuka

Kunio Shigeta

Satoshi Uchino

Yoshitaka Yasufuku

Keiichi Inagaki

Akira Ohira

Hideo Yoshizawa

Yasuo Tsuda

Shigeaki Tokutake

Junji Ujihara

Hideki Murata

Toshiaki Tezuka

Hideaki Iwama

Yoshiaki Shimizu

Toyoko Shibata

Shinichi Hamaguchi

Kenichi Yasuda

Shigehiro Kitamura

Takeo Oshiba

Yasuhiko Tanaka

Tomoko Sakimura

Fumitaka Mochizuki

Tatsuichi Maehashi

Ryosuke Isobe

Kunihiro Ogura

Wataru Fujimatsu

Yoshihiko Eto

Hiroaki Yamagishi

Eiichi Kijima

Mitsutaka Arai

Yumi Matsuzawa

Kenji Watanabe

Hideyuki Anzai

Toshihiko Sato

Mutsumi Sekimoto

Michitoshi Iwao

Tetsuro Sunaga

Toshio Tsuji

Shegehiro Kitamura

Kunio Konica Minolta Business Tec Inc Shigeta

Hiroshi Konica Minolta Business Tec Inc Yamazaki

Akihiko Konica Minolta Business Tec Inc Itami

An image forming method, comprising: forming an electrostatic latent image on a rotatable organic photoreceptor; forming a developing brush with a developing agent containing a toner on a rotatable developing sleeve; and bringing the developing brush in contact with the photoreceptor at a developing region so as to visualize the electrostatic latent image into a toner image. The photoreceptor comprises a conductive support member, an intermediate layer containing a binder resin and inorganic particles which have a number average primary order particle size of 3 to 200 nm, and a photosensitive layer provided on the intermediate layer, and the rotating direction of the developing sleeve is counter to that of the photoreceptor at the developing region.

Image forming method, image forming apparatus and organic photoreceptor

A toner image is formed while a developing sleeve is rotated in a direction counter to that of an organic photoreceptor at the developing section and a developing agent contains toner which contains toner particles having a particle diameter of 0.7&#xd7;(Dp50) or less in an amount of 8 number % or less and has water content of 0.1 to 2.0 mass % under an environment of 30&#xb0; C. and 80% RH, where Dp50 represents 50% number % particle diameter of toner particles.

Image forming method and image forming apparatus

An image forming method characterized in that a plurality of toner images which differ in color is formed as superposed; a plurality of the superposed toner images is simultaneously transferred onto a sheet of recording paper; the turbidity of toners of each color which form a plurality of the toner images is less than 60; and the maximum turbidity difference among said toners of each color is 5-45.

Image forming method and an image forming apparatus

Disclosed is an image forming method employing an apparatus comprising a plurality of toner image forming units, which forms a plurality of toner images and transfer them onto an intermediate transferring member in sequence, and the transferred images is transferred onto a recording sheet. The developer is a non-magnetic single component toner and turbidity of toners of each color is less than 60; and the maximum turbidity difference among the toners is 5-45.

Method for forming image

An image forming method is disclosed, the method includes forming a latent image by irradiating an organic photoreceptor by a semiconductor laser or a light emission diode emitting light of a wavelength of from 350 to 500 nm, and developing the latent image by a developer containing a toner to form a toner image, the organic photoreceptor having a surface layer comprising a binder and fluororesin fine particles having an average primary particle diameter of not less than 0.02 &#x3bc;m and less than 0.20 &#x3bc;m.

Image forming method, a processing cartridge and an image forming method using the same

An image forming method comprising: developing a latent image formed on a cylindrical electrophotographic photoreceptor having a cylindricity of 5 to 40 &#x3bc;m, with a developer comprising toner in which a ratio Dv50/Dp50 of a 50% volume particle diameter Dv50 to a 50% number particle diameter Dp50 is 1.0 to 1.15, a ratio Dv75/Dp75 of a cumulative 75% volume particle diameter from the largest volume particle diameter Dv75, to a cumulative 75% number particle diameter from the largest number particle diameter Dp75, is 1.0 to 1.20, and the number of toner particles having a particle diameter of 0.7&#xd7;Dp50 or less is 10 percent by number or less, to form a toner image; and transferring the toner image from the photoreceptor to an intermediate transferring member, is disclosed.

A method of forming a toner image employing a photoreceptor is described. The photoreceptor comprises a photosensitive layer on a cylindrical conductive substrate, Formula (1) and Formula (2) are held,0&#x3c;Pmax&#x3c;2P&#x2003;&#x2003;Formula (1)2&#x2266;(max/)&#xd7;100&#x2266;50&#x2003;&#x2003;Formula (2)wherein P (&#x3bc;m) is the average of the coating layer thickness in central section in the width direction of the photoreceptor, Pmax (&#x3bc;m) is average of the maximum value of the layer thickness out of the image forming region, and D (&#x3bc;m) is average of distance between point, at which said maximum value is obtained, and edge of the coating layer, and the toner contains 1.0 to 7.0 number % of toner particles having number based particle diameter not more than 3.17 &#x3bc;m based on whole number of toner particles, and number average toner particle diameter is 4-9 &#x3bc;m.

Image forming method

Disclosed is an electrophotographic photoreceptor which comprises a layer on a support, wherein the photoreceptor satisfies a condition represented by Formulas 1 and 2;0&#x3c;&#x3c;2&#x2003;&#x2003;Formula 12&#x2266;()&#xd7;100&#x2266;50&#x2003;&#x2003;Formula 2

Electrophotographic photoreceptor and an image forming method employing the same

A photoconductor for electrophotography, includes a conductive substrate; a photosensitive layer containing charge generation material formed on the conductive substrate. The charge generation material contains a substituted or unsubstituted gallium phthalocyanine dimer (GaPhC dimmer) and a substituted or unsubstituted hydroxy gallium phthalocyanine (GaPhC monomer) and has distinctive diffraction peaks at the Bragg angles (2&#x3b8;&#xb1;0.2) of 7.5&#xb0; and 28.3&#xb0; in a Cu-K&#x3b1; characteristic X-ray diffraction spectrum.

Photoconductor for electrophotography

A toner image is formed while a developing sleeve is rotated in a direction counter to that of an organic photoreceptor at the developing section and a surface layer of the organic photoreceptor contains metal oxide particles which have a number average primary particle diameter of 3 to 150 nm and are chosen from metal of the 3rd or 4th cycle of a periodic table.

An image forming method, comprising the steps of: charging uniformly a surface of an organic photoreceptor while rotating the organic photoreceptor; exposing the charged surface of the photoreceptor with a light beam having a wavelength in the range of 350 nm to 500 nm in a main scanning direction to form a dot-shaped electrostatic latent image on the photoreceptor; and developing the dot-shaped electrostatic latent image with toner to form a dot-shaped toner image on the photoreceptor so as to satisfy the following formulas:1.1&#x2266;B/A&#x2266;1.5 and 10&#x2266;A&#x2266;50,where A is the length (&#x3bc;m) of an exposed dot of the dot-shaped electrostatic latent image in the main scanning direction, and B is the length (&#x3bc;m) of a toner dot of the dot-shaped toner image in the main scanning direction.

An electrophotographic image forming method is disclosed. The method contains steps of forming an electrostatic latent image on an organic photoreceptor, and developing the electrostatic latent image by a developer containing toner to form a toner image on the photoreceptor. In this method the photoreceptor contains inorganic particles in a surface layer, the toner has circle equivalent diameter d of 3.0 to 8.0 &#x3bc;m viewed from a direction which maximizes the projective area of toner particles, the toner has a flatness ratio d/t of 2.0 to 5.0, wherein d is circle equivalent diameter and t is average thickness of toner particles, and the electrostatic latent image is developed in such a manner that the developing sleeve is rotated in the opposite direction to the photoreceptor.

An electrophotographic photoreceptor includes a surface layer having a contact angle of 90 to 130&#xb0; on a cylindrical conductive substrate having a cylindricity of 5 to 40 &#x3bc;m.

Electrophotographic photoreceptor, image forming apparatus and image forming method

Disclosed is an organic photoreceptor possessing a photosensitive layer having a surface layer, provided on a conductive support, wherein the surface layer of the organic photoreceptor contains a block copolymer composed of a matrix component and a low surface energy component, and possesses a sea/island structure having domains formed by aggregating the low surface energy component in the block copolymer, and also disclosed are a process cartridge, an image forming method and an image forming apparatus, employing the foregoing organic photoreceptor.

Organic photoreceptor, process cartridge, image forming method, and image forming apparatus

An image forming apparatus for enabling an image forming which is stable for a long time, by using a charging method in which the amount of generated ozone or nitrogen oxides is reduced and consumed electric power is low. An image forming method includes: a charging section for charging a photoreceptor by contacting on the photoreceptor; an exposure section for forming a static latent image on the photoreceptor by an exposure; a developing section for developing a toner image on the static latent image by a toner having a toner particle which uses a binder resin and a colorant as a component, in which a total quantity of a volatile material measured by a headspace method is 350 ppm or less; and a transfer section for transferring the toner image on a transfer material.

Image forming apparatus and image forming method

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Tokyo, Japan

Masao Asano