Konica Minolta Business Technologies, Inc.

Konica Corporation

Konica-Minolta Holdings, Inc.

Shigeki Takenouchi

Tatsuya Nagase

Yukio Hosoya

Okushi Okuyama

Satoshi Uchino

Eiichi Sakai

Akihiko Itami

Masao Asano

Kazuhiko Sato

Yoshihide Fujimaki

Hiroshi Yamazaki

Ken Ohmura

Tomoe Kitani

Hiroyuki Konno

Katsumi Matsuura

Kiyoshi Tamaki

Akira Hirano

Shiori Saito

Hideyuki Matsumoto

Yuuko Yamaguchi

An image display medium is disclosed, which medium includes a pair of substrates each having an electrode and colored particles between the pair of substrates, and the colored particles have an absolute electric charge of 0.5 to 4.0 &#x3bc;C/g.

Image display medium, preparation method thereof

Disclosed are white particles for an image display device which includes: (i) a pair of substrates facing each other, provided that at least one of the substrates is transparent; and (ii) the white particles enclosed in a gap between the substrates, with which an image is displayed through migration of the white particles by generating an electric field between the substrates, wherein each of the white particles contains: (a) a core particles containing an inorganic oxide having a refractive index of 2.0 or more in an amount of 80 to 99 weight % based on the total weight of the core particle; and (b) a resin layer having a thickness of 10 to 1000 nm on a surface of the core particle.

White particles for image display device

An image display devicehaving two substratesandat least one of which is transparent; and display particlesandenclosed in the powder form between the substrates, the display particles being moved under an electric field generated between the substrates so that an image is displayed, wherein metal oxide fine particlessurface-treated with at least one processing agent selected from the group consisting of silane-coupling agents and silicone oils are adhered to at least one substrate surfaceand/orof the surfaces in contact with the display particles in a gapbetween the substrates.

Image display device

An image display device comprising: (i) a pair of substrates facing each other; and (ii) particles placed in a gap between the substrates, wherein at least one of the substrates is a resin substrate which is transparent and exhibits a light transmittance of 50% or more at a wavelength of 300 nm.

Disclosed is an image display device comprising: (i) a pair of substrates facing each other, provided that one of the substrates is transparent; and (ii) charged particles placed in a gap between the substrates, wherein each of the substrates has a layer containing a compound having a silicone structure in the molecule on a surface of the substrates faced with another electrode.

Disclosed is a photoreceptor comprising a cylindrical substrate and a photosensitive layer. The substrate wherein the cylindrical substrate has a cylindricity of 5 to 40 &#x3bc;m, and the photoreceptor satisfies the relation of0&#x3c;()&#x3c;5.0&#xd7;10mm,wherein PWS is an average value of power spectrum values of regular reflection light amount in a region of a space frequency from 0 to 2 mmmeasured at the wave length of imagewise exposing light to the photoreceptor, and P is an average value of reflection light at the measuring point of the photoreceptor. An image forming method employing the photoreceptor is also disclosed, which comprises developing a latent image formed on the photoreceptor, with a developer comprising a toner including toner particles having a variation coefficient of shape coefficient of not more than 16%.

Organic photoreceptor and an image forming method using the same

An organic photoreceptor for an electro-photography, comprising a conductive support member and at least a light sensitive layer, and comprising a toner image forming surface of the photoreceptor having a surface roughness Ra between 0.02 &#x3bc;m and 0.1 &#x3bc;m and a surface roughness Rz between 0.1 &#x3bc;m and 1 &#x3bc;m, and an image forming apparatus comprising the same are disclosed.

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

An image forming apparatus, comprising: an electrophotographic photoreceptor and an intermediate transfer member, wherein the photoreceptor and the intermediate transfer member have a condition represented by Formula 1:Wa&#x3c;Wbwhere Wa represents a water content (wt %) on the surface of the photoreceptor and Wb represents a water content (wt %) on the surface of the intermediate transfer member.

Image forming apparatus and an image forming method

An image forming apparatus comprising a plurality of image forming units, an intermediate transfer member, and an intermediate transfer member cleaning device to remove toner remaining the intermediate transfer member with plural cleaning blades,

Image forming apparatus and image forming method

An image forming apparatus comprising: a photoreceptor; and a plurality of processing devices to form an image, wherein at least one of the processing devices include a portion assembled by an adhesive material including a volatile gas component in an amount of 0.1&#x2013;9 &#x3bc;g/cm.

Adhesive material for processing device, process cartridge, and electrophotographic image forming apparatus

An electrophotographic image forming method is disclosed. A latent image on a photoreceptor is developed to form a toner image on the photoreceptor by a developer and the toner image is transferred to a recording material or an intermediate transfer element, and the developing and the transferring are performed while regulating a contact angle of the photoreceptor with water within &#xb1;5&#xb0; of an average contact angle by applying a surface energy-lowering agent on the surface of the photoreceptor.

Image forming method and image forming apparatus

A method for forming plural images by repeating a process is disclosed. The method comprises the steps of (1) forming an electrostatic latent image on an organic photoreceptor, (2) developing the electrostatic latent image formed on the organic photoreceptor with a toner particles each of which contains domains of releasing agent having a number average domain diameter of 0.1 .mu.m to 1.1 .mu.m to form a toner image, (3) transferring the toner image to a image receiving paper using a transferring roller being pressed to the photoreceptor with a pressure of 25 g/cm.sup.2 to 1000 g/cm.sup.2, (4) separating the image receiving paper carrying the transferred toner image from the photoreceptor, (5) fixing the toner image carried on the image receiving paper, and (6) cleaning the surface of the photoreceptor.

Electrophotographic image forming method

A color toner image forming apparatus comprises a transferring roller having an average cell diameter of 1 .mu.m to 300 .mu.m to transfer a toner image from a photoreceptor drum to a sheet. During the transferring operation, the electric bias member applies onto the transferring roller an opposite electric bias of a constant current having the opposite electric polarity to that of the toner image, and during a cleaning operation to shift toner adhered on the transferring member to the photoreceptor, the electric bias member applies onto the transferring member alternately an identical electric bias of a constant voltage having the identical electric polarity with that of the toner image and an opposite electric bias of a constant current having the opposite electric polarity to that of the toner image six times or more.

Color image forming apparatus having bias controller for cleaning

An image forming apparatus has a photoreceptor which has a radius of curvature of more than 35 mm at a transfer position or a separation position, a transfer roller provided at the transfer position where the transfer roller faces the photoreceptor, a transfer power supply source to supply a predetermined DC bias current onto the transfer roller, a conductive brush-shaped separation device provided at the separation position where the separation device faces the photoreceptor, and a separation power supply source to supply a variable DC bias voltage onto the separation device.

Image forming apparatus having transfer roller and separation brush

An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive support and provided thereon, a layer comprising a carrier generating material and a polymer having a repetition unit represented by the following formula (1); ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an alkylsilyl group or an arylsilyl group, and n is a natural number.

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Tokyo, Japan

Shigeki Takenouchi