Abstract: An electroconductive resin belt having a flame resistance of VTM-0 in UL94 standard when having a thickness of from 50 to 150 ?m includes a first resin selected from the group consisting of polyetherimide-siloxane block copolymer, polyphenylene sulfide and polyimide; a second resin selected from the group consisting of polyetherimide, polyether sulfone, polyester, aliphatic polyamide, polyetherimide-siloxane block copolymer and polyamideimide; carbon as a first conductant; and at least one second conductant selected from the group consisting of particulate Al-doped ZnO, particulate Ga-doped ZnO, particulate Sb-doped SnO2, particulate In-doped SnO2, particulate P-doped SnO2 and the group consisting of metal oxides coated with any one of the second conductant group.

Abstract: A conductive resin belt includes at least one amorphous polymer selected from a first group consisting of polyether imide and polyether sulfone, at least one crystalline polymer selected from a second group consisting of polyether ether ketone and polyphenylene sulfide, at least one reactive polymer selected from a third group consisting of a copolymer of ethylene and glycidyl methacrylate and a polymer including an oxazoline group, and a conductivity imparting material. Surface resistivity of the conductive resin belt at 500V is 106 ?/sq. Volume resistivity of the conductive resin belt at 100V is 106 ?·cm to 1014 ?·cm. A cross-section of the conductive resin belt includes a dispersion phase and a continuous phase. The reactive polymer exists at a concentration of 30% to 70% within 10 nm to 1 ?m of an interface between the dispersion phase and the continuous phase.

Abstract: A belt assembly is disclosed. The belt assembly comprises an incompatible-polymer alloy including at least one crystalline resin which is selected from polyphenylene sulfide, polyetheretherketone, and polyvinylidene difluoride and at least one amorphous resin which is selected from polyethersulfone and polycarbonate, polyphenyleneether, polysulfone, and polyarylate. Wherein the weight ratio between the crystalline resin and the amorphous resin is from 70:30 to 95:5, carbon as a first conductive agent is distributed unevenly only in a successive layer, at least a second conductive agent which is selected from ZnO particles, SnO2 particles. Sb-doped SnO2 particles, In-doped SnO2 particles, P-doped SnO2 particles and metal-oxide particles covered by one of these particles is distributed unevenly only in the successive layer, and a flame-resistance value of the belt is VTM-0 under a condition that a thickness thereof is from 50 [?m] to 150 [?m] at a UL 94 standard.

Abstract: To provide a seamless belt, which includes: a polyether imide containing a siloxane bond; at least one selected from the group consisting of a polyphenylene sulfide, a polyether ether ketone, a thermoplastic fluororesin, and a liquid crystal polymer; an ethylene-glycidyl (meth)acrylate copolymer; and an electrical conductivity-imparting agent.

Abstract: A development roller, including a development sleeve disposed near a photo conductive drum, a magnetic roller disposed in the development sleeve, and a supplying device configured to supply a developer including a toner and a magnetic carrier to the photo conductive drum uniformly, the development sleeve having an outer surface on which the developer including the toner and the magnetic carrier is adsorbed by a magnetic force of the magnetic roller.

Abstract: A heat-resistant endless resin belt including a heat-resistant resin sheet, which can be employed in a thermal fixing apparatus, wherein the sheet includes two cutting work parts in an inclined shape. The two parts are overlapped with each other and bonded with an adhesive to form a bonding part. An external shape displacement f(x), measured via a flatness measuring apparatus, which scans the belt in a width direction thereof, satisfies a following formula ? 0 x ? ? f ? ( x ) - g ? ( x ) ? ? ? ? x ? XL 6800 , wherein “X” (mm) is a length of the belt in a width direction thereof; “L” (mm) is a perimeter of the belt and “g(x)” represents a displacement of an ideal shape of the heat-resistant resin belt, when g(x)=C (a constant), a left side of the formula is set to be a minimum; whilst when g(x) is a variable, the displacement of the ideal shape of the belt is set.

Abstract: A method for producing a heat-resistant resin endless belt includes preparing a heat-resistant resin sheet including a first surface and a second surface opposite to each other; forming a first inclined thinned portion at an end of the first surface and a second inclined thinned portion at an end of the second surface as the inclined thinned portion is formed to be gradually thinned toward the end, the end of the first surface being opposite to the end of the second surface; applying an adhesive composition by a screen printing method on at least one of the first and second inclined thinned portions; joining the first and second inclined thinned portions of the sheet to each other; and hardening the adhesive composition, in which the adhesive composition is an additive polymerized silicon adhesive composition containing ferric (III) oxide at between 6.5 and 9.

Abstract: A development roller, including a development sleeve disposed near a photo conductive drum, a magnetic roller disposed in the development sleeve, and a supplying device configured to supply a developer including a toner and a magnetic carrier to the photo conductive drum uniformly, the development sleeve having an outer surface on which the developer including the toner and the magnetic carrier is adsorbed by a magnetic force of the magnetic roller.

Abstract: A method for producing a heat-resistant resin endless belt includes preparing a heat-resistant resin sheet including a first surface and a second surface opposite to each other; forming a first inclined thinned portion at an end of the first surface and a second inclined thinned portion at an end of the second surface as the inclined thinned portion is formed to be gradually thinned toward the end, the end of the first surface being opposite to the end of the second surface; applying an adhesive composition by a screen printing method on at least one of the first and second inclined thinned portions; joining the first and second inclined thinned portions of the sheet to each other; and hardening the adhesive composition, in which the adhesive composition is an additive polymerized silicon adhesive composition containing ferric (III) oxide at between 6.5 and 9.

Abstract: A magnet compound material to be compression molded, said magnet compound material comprising a magnetic powder and a binder resin particles, wherein a ratio of Dv to Dn is in a range of 1.1 to 1.3, Dv and Dn of the binder resin particles denote the volume average particle diameter and the number average particle diameter, respectively.

Abstract: A heat-resistant endless resin belt including a heat-resistant resin sheet, which can be employed in a thermal fixing apparatus, wherein the sheet includes two cutting work parts in an inclined shape. The two parts are overlapped with each other and bonded with an adhesive to form a bonding part. An external shape displacement f (x), measured via a flatness measuring apparatus, which scans the belt in a width direction thereof, satisfies a following formula ? 0 x ? ? f ? ( x ) - g ? ( x ) ? ? ? ? x ? XL 6800 , wherein “X” (mm) is a length of the belt in a width direction thereof; “L” (mm) is a perimeter of the belt and “g (x)” represents a displacement of an ideal shape of the heat-resistant resin belt, when g (x)=C (a constant), a left side of the formula is set to be a minimum; whilst when g (x) is a variable, the displacement of the ideal shape of the belt is set.

Abstract: An image carrier includes a photosensitive layer which carries a latent image, and a lubricant-coated layer formed on a surface of the photosensitive layer, and the lubricant-coated layer is made of a mixture containing a melaminecyanurate, and a polyimide or a silicone resin.

Abstract: The long magnet includes a magnet block made of a mixture of rare earth magnetic powder, thermoplastic resin particles, fluidity additive, pigment, wax and charge control agent, and a reinforcing member to reinforce the magnet block. At least part of the reinforcing member is arranged inside of the magnet block.

Abstract: A development magnet roller for use in a development roller of an electrophotographic image forming apparatus is provided. The development magnet roller has a development pole to form a magnetic field causing a developer born on a surface of the development roller including the development magnet roller to rise in a form of a series of ears in a development area of the image forming apparatus where the development roller opposes an image bearing member, and in a magnetic flux density distribution in a normal line direction of the development pole, a peak magnetic flux density is 120 mT or greater, a zero gauss region width is 70° or greater, and a half-value region width is 40° or smaller.

Abstract: A developing roller includes a developing sleeve having a nonmagnetic material, and a magnet roll provided inside the developing sleeve and formed by dispersing a magnetic powder in a polymer compound. A portion of the magnet roll corresponding to a developing pole of the magnet roll is equipped with a main-pole molded magnet whose magnetic force per unit of volume is greater than that of the magnet roll. A magnetic pole adjacent to the developing pole of the magnet roll downstream in the developer conveyance direction has a peak magnetic flux density on the developing sleeve greater than that of the developing pole, and has a half value width, which is the width of the magnetic pole at which a magnetic flux density of one-half the peak magnetic flux density is exhibited, greater than that of the developing pole.

Abstract: A development roller, including a development sleeve disposed near a photo conductive drum, a magnetic roller disposed in the development sleeve, and a supplying device configured to supply a developer including a toner and a magnetic carrier to the photo conducive drum uniformly, the development sleeve having an outer surface on which the developer including the toner and the magnetic carrier is adsorbed by a magnetic force of the magnetic roller.

Abstract: In a developing device for an image forming apparatus of the present invention, use is made of a magnetic molding produced by compression-molding a magnet compound material in a magnetic field. The magnet compound material contains, in addition to magnetic powder and fine, thermoplastic resin grains that are major components, at least one of a pigment and a charge control agent.

Abstract: A magnet compound material to be compression molded, said magnet compound material comprising a magnetic powder and a binder resin particles, wherein a ratio of Dv to Dn is in a range of 1.1 to 1.3, Dv and Dn of the binder resin particles denote the volume average particle diameter and the number average particle diameter, respectively.

Abstract: A developer carrier for an SLIC developing system includes a developing sleeve and a magnetic roll having a plurality of magnetic poles. A narrow development nip is formed by narrowing the width of a development pole forming a magnet brush and by narrowing a developer rising region in a developing region where a flux density attenuation ratio of the development pole is 40% or more. A half-value width of the flux density of the development pole is 22° or less and the flux density variation rate is 4.0 mT/Deg or more in a circumferential direction in a part where the flux density in at least half of that of a downstream side of a developer carrying direction from a peak magnetic force position of the development pole is 90% or less.

Abstract: A developing roller, comprising a developing sleeve consisting of a nonmagnetic material, and a magnet roll provided inside the developing sleeve and formed by dispersing a magnetic powder in a polymer compound, the portion corresponding to the developing pole of the magnet roll being equipped with a main-pole molded magnet whose magnetic force per unit of volume is greater than that of the magnet roll, wherein the magnetic pole adjacent to the developing pole of the magnet roll downstream in the developer conveyance direction has a peak magnetic flux density on the developing sleeve equal to or greater than that of the developing pole, and has a half value width, which is the width of the magnetic pole at which a magnetic flux density of one-half the peak magnetic flux density is exhibited, is greater than that of the developing pole.