Sharp Kabushiki Kaisha Corporation

Takeshi Satoh

Takahiro Bito

Tatsuo Imafuku

Masanobu Deguchi

Hitoshi Nagahama

Yoshitaka Kawase

Takeshi Ohkawa

Eiji Tenjiku

Kazuki Takatsuka

Masaki Ueji

Tenjiku Eiji

Ohkawa Takeshi

Akiko Tsujimoto

Provided is a photocatalyst layer that improves the photocatalytic performance while suppressing detachment of photocatalyst particles. The photocatalyst layer has a front surface and a rear surface on the opposite side of the front surface. The photocatalyst layer includes photocatalyst particles and a binder. The photocatalyst layer has a first region containing the photocatalyst particles and a second region containing the binder and not containing the photocatalyst particles. The photocatalyst particles include tungsten oxide particles. The photocatalyst particles have contact points being in contact with the rear surface. The ratio of the thickness of the second region to the number-average secondary particle diameter of the photocatalyst particles is 0.20 or more and 0.80 or less.

Photocatalyst layer, photocatalyst, and method for manufacturing photocatalyst

The present invention provides a carrier for a two-component electrophotographic developer, comprising a core particle and a thermoset silicone resin layer coated thereon, wherein said layer comprises a charge control agent and is formed by heat-treatment at a temperature below the melting point of said charge control agent.

Carrier, two-component developer using the same, and image-forming apparatus using said developer

A toner comprising a small-particle diameter external additive having a number average particle diameter of 7 to 20 nm, a large-particle diameter external additive having a number average particle diameter of 40 to 80 nm and a toner particle having a volume average particle diameter of 4 to 7 &#x3bc;m, wherein the large-particle diameter external additive is stuck to the surface of the toner particles in a semi-embedded state and has a rate of liberation of 0.1% by weight or less from the surface of the toner particle.

Toner, two-component developer and image formation device

A developer container includes a cylindrical container main body, a supporting member, a sheet-like developer guiding member, and an adhesion eliminating portion. The container main body has a concavity forming a storage space, has a discharge hole, and conveys the stored developer toward the discharge hole by rotating about its axial line. The supporting member covers a portion including the concavity and the discharge hole over circumferences thereof to support the container main body so as to be rotatable about the axial line, and has a leading through hole for leading the developer discharged from the discharge hole of the container main body to the outside. The developer guiding member guides the developer discharged from the discharge hole of the container main body to the leading through hole. The adhesion eliminating portion eliminates developer adhering to the developer guiding member through rotation of the container main body.

Developer container for storing a developer used for electrophotographic image formation

Provided is a developing toner for electrostatic latent images capable of coping with the size reduction of an image forming apparatus and decrease of the consumption amount, not shortening the working life of a photoreceptor, less causing paper jam, background fogging, etc., excellent in various characteristics required for the toner, and capable of forming images of good picture quality. The developing toner being used when images are formed to a recording material in an image forming apparatus comprising an image forming station, a recording material feeding station, an image fixing station and a controlling station, the developing toner for electrostatic latent images containing hydrophobic fluidizing particles deposited to the surface of coloring resin particles comprising a binder resin containing a polyester resin, a polyalkylene, a polyolefin dispersant and a non-oxidized polyethylene resin, and an inorganic pigment, and having time constant &#x3c4; of from 100 to 350 msec.

Developing toner for electrostatic latent images, imaging forming method and image forming apparatus

A toner for electrostatic image development, which contains toner particles in which not more than 13 percent by number of the toner particles have a particle diameter of smaller than 4 &#x3bc;m, not less than 20 percent by number of the toner particles have a particle diameter of 4 &#x3bc;m to 6 &#x3bc;m, and not more than 2.0 percent by volume of the toner particles have a particle diameter of 16 &#x3bc;m or greater. The toner particles have a volume average diameter of 4 &#x3bc;m to 9 &#x3bc;m, and at least an external additive is added to the toner particles.

Growing community of inventors

Yamatokoriyama, Japan

Takeshi Satoh