Nok Corporation

Ricoh Company, Ltd.

Sony Corporation

Shizuoka University

Shogo Suzuki

Kenji Sasaki

Satoshi Fukuoka

Kosuke Oura

Atsushi Ikeda

Kousuke Oura

Shigeru Yamada

Hideyuki Miyazawa

Makito Nakashima

Yuu Zama

Toshiyuki Mutoh

Kimio Aoki

Aya Utsuki

Kenichi Hayakawa

Chiaki Tanaka

Ryota Inoue

Yasuo Iwasaki

Satoyuki Sekiguchi

Makoto Ogura

Takeshi Sako

Satoshi Shinohara

Noriaki Okada

Idzumi Okajima

Takahiro Yamashita

Asami Uematsu

Shogo Torii

Satoshi Hukuoka

A conductive roller includes a base including an outer surface along and about an axial line thereof, and a surface layer arranged on the outer surface of the base. The surface layer includes particles. The ten-point height of irregularities Rz of the outer surface of the base is greater than or equal to 6.0 micrometers and less than or equal to 8.0 micrometers. A ten-point height of irregularities Rz of an outer surface of the surface layer is greater than or equal to 5.5 micrometers and less than or equal to 8.5 micrometers. The base included in the conductive roller preferably includes a core member and a conductive elastic layer arranged between the core member and the surface layer. The surface layer preferably includes a conductive portion including a resin material and a conductive agent.

Conductive roller

A conductive roller includes: a core member including an outer surface along and about an axial line thereof; and a surface layer arranged along the outer surface of the core member. The surface layer includes a conductive portion, and a surface roughness imparting material in a form of particles dispersed in the conductive portion. An average particle size of the surface roughness imparting material is in a range of 6 micrometers or greater and less than 10 micrometers. The number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 3.5×10particles per mmor greater and 7.5×10particles per mmor less. An average thickness of the surface layer is in a range of 0.2 micrometers or greater and 5.5 micrometers or less.

Conductive roller, image forming apparatus, and inspection method for conductive roller

A conductive roller includes: a core member including an outer surface along and about an axial line thereof; and a surface layer arranged along the outer surface of the core member. The surface layer includes a conductive portion formed of a conductive resin composition, and a surface roughness imparting material in a form of particles dispersed in the conductive portion. An average particle size of the surface roughness imparting material is in a range of 6 micrometers or greater and 10 micrometers or less. The number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 1.0×10particles per mmor greater and 2.0×10particles per mmor less. An average thickness of the surface layer is in a range of 3.0 micrometers or greater and 15.0 micrometers or less.

An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The arithmetic mean peak curvature Sof a surface of the surface layer is equal to or greater than 1,880 (1/mm), and is equal to or less than 14,024 (1/mm).

Electroconductive roll

An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The arithmetic mean peak curvature Sof a surface of the surface layer is equal to or greater than 1,880 (1/mm), and is equal to or less than 14,024 (1/mm) The density of peaks Sof the surface of the surface layer is equal to or greater than 93,406 (1/mm), and is equal to or less than 151,476 (1/mm). The surface area of the surface layer per unit projected area is equal to or greater than 1.255, and is equal to or less than 5.132.

Charging roll

A charging roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The average of heights of contours of convex portions on a surface of the surface layer relative to an average cylindrical surface obtained by averaging surface irregularities of the surface layer is equal to or greater than 0.8 micrometers and is equal to or less than 2.1 micrometers. The average of intervals between apexes of the convex portions on the surface of the surface layer is equal to or greater than 6.6 micrometers and is equal to or less than 11.5 micrometers.

An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The surface area of the surface layer per unit projected area is equal to or greater than 1.255, and is equal to or less than 6.635.

A charging roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The average of heights of contours of convex portions on a surface of the surface layer relative to an average cylindrical surface obtained by averaging surface irregularities of the surface layer is equal to or greater than 2.0 micrometers and is equal to or less than 8.4 micrometers. The average of intervals between apexes of the convex portions on the surface of the surface layer is equal to or greater than 6.7 micrometers and is equal to or less than 39.8 micrometers.

A method of producing an extract of an animal-derived or plant-derived biological material includes: extracting a component in the biological material using liquefied dimethyl ether for the biological material to obtain a liquefied dimethyl ether solution including the component; separating the solution from the biological material; and volatilizing or separating the liquefied dimethyl ether from the solution.

Method of producing extract and extraction residue of biological material, extract, and extraction residue

A charging roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The ten point height of irregularities Rof a surface of the surface layer is equal to or greater than 3.9 micrometers, and is equal to or less than 6.1 micrometers. The mean spacing between peaks Sof the surface of the surface layer is equal to or greater than 12.5 micrometers and is equal to or less than 13.5 micrometers.

An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The density of peaks Sof the surface of the surface layer is equal to or greater than 93,406 (1/mm), and is equal to or less than 153,027 (1/mm).

A fluid treatment apparatus for treating a target fluid is provided. The fluid treatment apparatus includes a cylindrical reactor and one or more catalyst members each having a rod-like or plate-like shape extending in a longitudinal direction within the reactor. The cylindrical reactor decomposes an organic substance contained in a mixed fluid of the target fluid with an oxidant by an oxidation reaction under heat and pressure. The cylindrical reactor has an introduction port on one end and a discharge port on the other end. An upstream end surface, relative to a direction of flow of the target fluid, of each of the catalyst members is located in a downstream vicinity of or upstream from an inflow position where the target fluid flows into the reactor through the introduction port. Each of the catalyst members is suspended with the upstream end surface being fixed.

Fluid treatment apparatus

A fluid purifying apparatus that purifies fluid containing organic matter has a reactor including a first transfer part that receives the fluid from outside and transfers the fluid in a vertical direction from an upper side to a lower side while heating and pressurizing the fluid and mixing the fluid with an oxidant, a second transfer part that receives the fluid that has passed through the first transfer part and transfers the fluid in the vertical direction from the lower side to the upper side, and a partition member that partitions an upper part of the reactor into the first transfer part and the second transfer part, and a solid storage part that communicates with the first transfer part and the second transfer part below the partition member and receives solid matter contained in the fluid that settles while the fluid is transferred.

Fluid purifying apparatus

A method for producing colored polymer particles, including adding a colorant-containing composition containing a radically polymerizable monomer and a colorant in a supercritical fluid or a subcritical fluid and polymerizing the radically polymerizable monomer, so as to produce colored polymer particles which are insoluble in the supercritical fluid or subcritical fluid, wherein the supercritical fluid or subcritical fluid is a supercritical fluid or subcritical fluid in which at least the radically polymerizable monomer is soluble, but polymer particles resulted from polymerization of the radically polymerizable monomer are insoluble, and wherein the colorant is at least one selected from the group consisting of a pigment, a dye and a polymer dye.

Colored polymer particles, method for producing the same, and toner and developer using the same

A data recording/reproducing apparatus in which plural disc-shaped recording/reproducing means are run in parallel. The apparatus is designed for avoiding the risk of the write/readout unit being changed in size to lower the transfer rate to raise the cost brought about by changing the number of the disc-shaped recording/reproducing means. A disc array unit,accesses video data of 163840 bytes equal to 40 times as many as 4096 bytes and audio data of 8192 bytes equal to twice as many as 4096 bytes to a data driving unit,D made up of seven HDDs with a size of, for example, 3584 bytes. An accessing control unit,controls data accessing to the disc array unit,. A data adjustment unit,appends a volume of nonsensical data (padding data) equal to a multiple of 3584 bytes at the time of recording, while taking out data excluding the padding data during reproduction in terms of 4096 bytes as a unit.

Growing community of inventors

Kanagawa, Japan

Shogo Suzuki