Ricoh Company, Ltd.

Chisso Corporation

Michitaka Sasaki

Yasuo Suzuki

Tetsuro Suzuki

Kohichi Ohshima

Eiji Kurimoto

Keisuke Shimoyama

Atsushi Inoue

Shinichi Kawamura

Tatsuya Niimi

Tadashi Hayakawa

Seiji Terazawa

Yoshiki Yanagawa

Yuki Oshikawa

Jun Saito

Akira Yamauchi

Takanori Nakashima

Kaori Mitsuishi

Takeshi Orito

Hiroyuki Iwasa

Chikashi Okayama

Shin-ichi Kawamura

A powder storage container capable of preventing erroneous opening of a powder loading port. The powder storage container includes a powder storage part configured to store a developer used for image forming, a powder discharge part provided on one end part of the powder storage part to discharge the developer stored in the powder storage part, a gripping part protruding through an end face of the one end part side of the powder storage part, a powder loading port causing an inner space of the powder storage part and an outer portion of the powder storage part to communicate with each other, and a sealing member capable of sealing the powder loading port. The powder loading port is enclosed by the gripping part.

Powder storage container and image forming apparatus in which a gripping part includes a powder loading port and a sealing member

An electrophotographic image forming apparatus, including a photoreceptor, a charger charging the surface of the photoreceptor, an irradiator irradiating the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, an image developer developing the electrostatic latent image with a developer including a toner to form a toner image on the surface of the photoreceptor, and a transferer transferring the toner image onto a transfer material, wherein the photoreceptor includes an electroconductive substrate, and a photosensitive layer overlying the electroconductive substrate and including a charge generation material and a specific charge transport material.

Electrophotographic image forming apparatus and process cartridge

To provide an electrophotographic photoconductor that has a layer containing a compound represented by the following general formula (1), and an image forming apparatus using the electrophotographic photoconductor. 

Electrophotographic photoconductor having charge blocking and moire preventing layers

The present invention provides an image bearing member that includes: a photoconductor; and a heating unit which heats the photoconductor, wherein the photoconductor includes: a support; a charge generating layer on the support, a charge transport layer, and a crosslinked charge transport layer in this order, wherein the crosslinked charge transport layer includes a reaction product of a radically polymerizable compound with three or more functional groups which does not have a charge transporting structure, and a radically polymerizable compound with one functional group, which compound has a charge transporting structure.

Image bearing member and image forming method using thereof, and image forming apparatus and process cartridge

An image forming method including: forming an electrostatic latent image on an image bearing member; developing the latent image with a toner; transferring the toner image onto a receiving material; and fixing the toner image. The image bearing member includes a substrate, and a charge generation layer, a charge transport layer and a crosslinked charge transport layer, wherein the crosslinked charge transport layer includes a compound obtained from radical polymerizable monomers including a monomer having three or more functional groups and no charge transport structure and a monomer having one functional group and a charge transport structure. The toner includes a binder resin, a colorant, and a release agent, wherein tetrahydrofuran-soluble components of the binder resin have a molecular weight distribution such that at least one peak is observed in a range of from 1,000 to 10,000 and the half-width of the molecular weight distribution curve is not greater than 15,000.

Image forming method, and image forming apparatus and process cartridge using the image forming method

An image forming process using an electrostatic latent image carrier containing a support and a photoconductive layer including: a charge generating layer, a charge transportable layer, and a cross-linked charge transportable layer which are disposed on the support in this order and the cross-linked charge transportable layer comprises a compound produced by the reaction between a trifunctional or more functional radical-polymerizable compound having no charge transportable structure, and a monofunctional radical-polymerizable compound having a charge transportable structure, and a toner produced in the form of particles by producing an adhesive base material through reacting a compound having an active hydrogen group with a polymer which can be reacted with the above-noted compound having an active hydrogen group in an aqueous medium.

Process cartridge, image forming apparatus, and image forming process

Image forming apparatus and process cartridge

A polypropylene composition which contains 0.01 to 5 parts by weight of an olefin (co)polymer (a) having an intrinsic viscosity of 15 to 100 dl/g, 100 parts by weight of a propylene homopolymer (b) having an intrinsic viscosity of 0.2 to 10 dl/g, and 28 to 300 parts by weight of an ethylene/propylene copolymer (c) having an intrinsic viscosity of 0.2 to 10 dl/g, and in which the ratio of the melt flow rate of the homopolymer (b) to that of the copolymer (c), MFR,/MFR,, is 0.3 to 4 and the product of the ratio of the intrinsic viscosity of the copolymer (c) to that of the homopolymer (b), &lsqb;&eegr;&rsqb;,/&lsqb;&eegr;&rsqb;,, and the weight ratio of the amount of the homopolymer (b) to that of the copolymer (c), W,/W,, is in the range of from 0.2 to 3.0. The composition has high melt tension, high crystallization temperature, and excellent thermal stability, and yields a molded article having excellent transparency, reduced molding shrinkage, and excellent resistance to whitening by impact or bending.

Polypropylene composition and process for producing the same

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Chiba, Japan

Michitaka Sasaki