Konica Corporation

Konica Minolta Business Technologies, Inc.

Kazuhisa Shida

Akihiko Itami

Tomoo Sakimura

Takeo Oshiba

Yohko Kitahara

Masahiko Kurachi

Masao Asano

Fumitaka Mochizuki

Hiroshi Yamazaki

Satoshi Uchino

Hirofumi Hayata

Tomoe Kitani

Kunihiro Ogura

Kageyuki Tomoyori

Takeo Ohshiba

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

An organic photoconductor, comprises a conductive base, a charge generating lager and a charge transport layer, wherein the charge generating lager and the charge transport layer are provided in this order on the conductive base, wherein when a curve is drawn by plotting integrated-values of a detected current in terms of time in measurement of transient photocurrent by TOF (time of flight) measurement with an electric field intensity of 10V/&#x3bc;m , crossing angle &#x3b8; of two tangent lines tangent to the curve is 15&#xb0; to 45&#xb0;; and the charge transport lager has a film thickness of 20 to 35 &#x3bc;m.

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

An electrophotographic photoreceptor having an intermediate layer in which the intermediate layer contains a compound formed from a composition containing the following components X, Y and Z.

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

An organic photoconductor including a charge generating layer and a charge transport layer on a conductive base, wherein crossing angle&#x3b8; of two tangent lines is 70&#xb0; or more, two tangent lines which border on a curve drawn by plotting integrated values of detected current versus time in measurement of transient photocurrent (TOF), at a field intensity of 10V/&#x3bc;m; and film thickness of the charge transport layer is 8 to 15 &#x3bc;m.

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

An electrophotographic photoreceptor having an interlayer and a photosensitive layer on an electroconductive substrate, wherein the interlayer comprises any one of 1) an N-type semiconductive particle containing at least one of transition metals having an atomic number of 21 to 30, 39, 41 to 48 and 57 to 80, the total amount of the transition metals having an atomic number of 21 to 30, 39, 41 to 48 and 57 to 80 being from 100 ppm to 2.0% by mass, or 2) a metal oxide particle containing a silicon atom in a bond energy spectrum by the X-ray photoelectron spectroscopy at a ratio represented by the following Formula (1): Formula (1) 0.02&#x2266;Si/M&#x2266;0.55 Si: a peak intensity of a silicon atom among the bond energy spectrum, and M: a peak intensity of a metal atom among the bond energy spectrum.

Electrophotographic photoreceptor and device

An image forming method is disclosed. The method comprises processes in which a latent image on an electrophotographic photoreceptor is developed employing a developer material, and after transferring the visualized toner image to a recording material, the remaining toner on said photoreceptor is removed employing an elastic body cleaning blade. The electrophotographic photoreceptor comprises a surface layer containing a charge transportable polysiloxane hardenable resin, and said developer material comprises a fatty acid metal salt.

Image forming method

A method of forming a toner image is disclosed. The photoreceptor is installed so that the center axis of the cylinder is to be almost horizontal, front edge of the cleaning blade is pressed against surface of the photoreceptor at the top, ratio of width of the photosensitive layer of the photoreceptor to length of the cylindrical electroconductive substrate is 80/100 to 99/100, and a number ratio of toner particles having a shape coefficient of 1.2 to 1.6 is at least 65 percent in the toner particles.

A photoreceptor for forming an electrostatic latent image is disclosed. The photoreceptor comprises a photosensitive layer and a resin layer wherein a resin of the resin layer comprises an organic polymer component, siloxane component and charge transportable component.

Photoreceptor for forming electrostatic latent image

An electrophotographic image carrier is disclosed. The image carrier has a photoreceptor made from a photoreceptive layer and a resin layer. The resin layer is made of a siloxane resin having a cross-linked structure, and contains an anti-oxidant.

Electrophotographic image carrier and image forming apparatus, image forming method and processing cartridge using it

Electrophotographic photoreceptor, electrophotographic image forming method, electrophotographic image forming apparatus and processing cartridge

Electrophotographic image forming method, electrophotographic image forming apparatus, and processing cartridge

An electrophotographic photoreceptor is disclosed. The photoreceptor has a photosensitive layer provided on an electrically conductive support which has a sealed alumite film, a surface layer of said electrophotographic photoreceptor comprises a hardenable siloxane resin having charge transportability or a hardenable siloxane resin comprising a partial structure having charge transportability.

Electrophotographic photoreceptor

In an electrophotographic photoreceptor which comprises an electrically conductive support having thereon a multilayer composed of a photosensitive layer and a protective surface layer in said order, an electrophotographic photoreceptor characterized in that said protective surface layer comprised of a layer comprising structural units having charge transportability, as well as siloxane based resins having a cross linking structure, and said photosensitive layer comprises titanyl phthalocyanine having a maximum peak of Bragg angle (2&thgr;&plusmn;0.2)&deg; at 27.2&deg; with respect to Cu-K&agr; ray.

Growing community of inventors

Hachioji, Japan

Kazuhisa Shida