Abstract: To provide a toner, which contains: toner base particles each containing a binder resin and a colorant; and an external additive containing inorganic particles and fatty acid metal salt particles, wherein the inorganic particles contain at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass.

Abstract: A polyester resin for a toner containing: a repeating unit derived from a dicarboxylic acid component; and a repeating unit derived from a dial component represented by Formula (1): wherein each of R1 and R2 independently represents a hydrogen atom or a methyl group, each of L1, L2 and L3 independently represents a divalent linking group selected from the group consisting of carbonyl groups, ester groups, ether groups, sulfonyl groups, substituted or unsubstituted chained alkylene groups, substituted or unsubstituted cyclic alkylene groups, substituted or unsubstituted arylene groups, and combinations thereof, L1 and L2 or L1 and L3 optionally forms a ring, each of A1 and A2 independently represents a rosin ester group, and the acid value is from 3 mgKOH/g to 30 mgKOH/g.

Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.

Abstract: A cleaner-less image forming apparatus includes an LED which is arranged with a closest distance of 10 to 5000 ?m to a photosensitive member and exposes the photosensitive member. In the image forming apparatus, an absolute value of an average charge of a developer is between 50 ?C/g and 90 ?C/g, and a contact angle of the photosensitive member with respect to pure water is not less than 90° and not more than 150°.

Abstract: To provide a toner including at least a binder resin and a colorant, wherein the binder resin has two glass transition temperatures Tg1 and Tg2 in a differential scanning calorimetry at a heating speed of 5° C./min, the glass transition temperature Tg1 is ?20° C. to 20° C., and the glass transition temperature Tg2 is 35° C. to 65° C., wherein the binder resin comprises a polyester skeleton and a ring-containing skeleton molecule at ends thereof, and wherein the binder resin is obtained by block copolymerization of: a polyester skeleton A which includes a structural unit obtained by dehydration condensation of a hydroxycarboxylic acid in a repeating structure; and a skeleton B which does not include a structural unit obtained by dehydration condensation of a hydroxycarboxylic acid in a repeating structure.

Abstract: The invention is to provide a toner with a small difference of charging properties and an excellent cleaning property. The toner includes toner particles of cylindrical bodies.

Abstract: Provided is a developing member capable of suppressing occurrence of compression set. The developing member comprises a substrate; an elastic layer provided on the substrate; and a coating layer provided on the elastic layer, wherein the elastic layer contains a cured substance of a mixture containing the following (A) to (D): (A) organopolysiloxane having two or more vinyl groups bonded to a silicon atom in one molecule and having a viscosity at 25° C. of 10 Pa·s or more and 100 Pa·s or less; (B) organopolysiloxane including constituent units of SiO4/2 unit and R1R2R3SiO1/2 unit, where R1, R2, and R3 each represent one of a methyl group and a vinyl group, and having two or more vinyl groups bonded to a silicon atom in one molecule; (C) organohydrogenpolysiloxane having two or more hydrogen atoms bonded to a silicon atom in one molecule; and (D) carbon black.

Abstract: A toner including a mother particle and an external additive covering a surface of the mother particle is provided. The mother particle includes a binder resin, a colorant, and a release agent. The external additive includes a particulate cellulose having a number average particle diameter within a range of 15 to 105 nm.

Abstract: A developer, including a toner including a binder resin comprising a crystalline resin; and a colorant, and a resin carrier comprising a resin; a magnetic particulate material having a magnetic anisotropy, dispersed in the resin, and having a saturated magnetization of from 16 to 30 emu/g, a coercive force of from 15 to 40 kA/m and an average particle diameter not less than 15 ?m and less than 100 ?m.

Abstract: A toner includes a binder resin, a coloring agent, and a releasing agent containing two or more kinds of alkyl monoester compounds having a different number of carbon atoms in a range of from 30 to 50 carbon atoms. The toner has a crystallinity of 10% or more as measured by x-ray diffraction and/or the binder resin is a crystalline resin in an amount of 50% by weight or more of the binder resin. The two or more kinds of alkyl monoester compounds include a component A accounting for the largest amount ranging from 30% by weight to less than 50% by weight of the releasing agent and a component B accounting for the second largest amount ranging from 10% by weight to less than 50% by weight of the releasing agent.

Abstract: An image forming agent storage unit includes a body portion and a pair of a protrusion portion. The body portion extends in an insertion direction in which the image forming agent storage unit is inserted into an image forming apparatus. The pair of a protrusion portion is disposed on an outer face of the body portion and extends along the insertion direction. An approximate geometrical center of gravity of a cross-sectional shape of the body portion is disposed between the pair of the protrusion portion. One of the protrusion portions is disposed on an upper right angle position between an upper portion of the body portion and a right portion of the body portion and the other of the protrusion portions is disposed on a lower left angle position between a lower portion of the body portion and a left portion of the body portion.

Abstract: An electrophotographic toner, which is decolorized by heating and a glossiness after decolorization of which is less than 10, comprising an electron donating color former compound, an electron accepting color developing agent, and a polyester binder resin.

Abstract: A developing apparatus including a developing container for containing developer, the developing container having an opening portion, a developer carrying member for carrying the developer at the opening portion, a detecting member for detecting a developer amount, the detecting member detecting a capacitance between the developer carrying member and the detecting member, and a force receiving portion for receiving a force and moving the developing container between a first position in which a developing operation is performed by the developer carrying member and a second position in which the developing operation is not performed, wherein the capacitance can be detected in the second position, and the detecting member is a rotatable developer supplying member for supplying the developer to the developer carrying member, the developer supplying member including a foam layer in which the developer can enter.

Abstract: An electrostatic charge image developing toner includes: bright pigment particles; and a binder resin, and the electrostatic charge image developing toner has a main peak and at least one peak or shoulder that is higher in molecular weight than the main peak in a molecular weight distribution of a tetrahydrofuran-soluble component that is obtained through gel permeation chromatography measurement, and satisfies the following formula: 2?A/B?100, wherein A is reflectance at an acceptance angle of +30° that is measured when a solid image is formed using an electrostatic charge image developing toner and the image is irradiated with incident light at an incidence angle of ?45° by the use of a variable-angle photometer, and B is reflectance at an acceptance angle of ?30° that is measured when the image is irradiated with incident light at an incidence angle of ?45° by the use of a variable-angle photometer.

Abstract: A method of manufacturing toner carrier formed of a core and a cover thereon, including the steps of: coating the core with a liquid cover containing a solvent and a material for forming the cover on the core in a processing tank; heating the core and the cover by first microwave radiation to volatilize the solvent from the cover; and removing the solvent volatilized in the step of heating from the processing tank.

Abstract: A developer includes a toner containing at least a binder resin, wherein the toner has a molecular weight distribution Mz/Mw of 2.0 or smaller and a phase angle of viscoelasticity of 65° or greater.

Abstract: The present disclosure describes toner compositions containing an additive package including one or more additives that exhibit low dielectric loss, which toners exhibit improved tribo charging, 2nd transfer efficiency and IQ without affecting color.

Abstract: The invention relates to a toner for developing a toner image, the toner comprising a binder resin, a colorant, a first wax and a compatibilizer. The wax is finely dispersed within the toner. The compatibilizer has a melting transition, wherein the lower temperature limit of the melting transition is between 110° C. and 140° C. at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. The invention further relates to a printing system for applying the toner according to the present invention on an image receiving medium. The invention further relates to a method for preparing the toner according to the present invention.

Abstract: A toner including a core particle and projections at a surface of the core particle is provided. The core particle includes a binder resin and a colorant. The binder resin includes a crystalline resin as a major component. Each of the projections consists of a fine resin particle. An average length of long sides of the projections is not less than 0.15 ?m and less than 0.5 ?m. A standard deviation of lengths of the long sides of the projections is 0.2 or less. A surface coverage of the toner with the projections is within a range of 30 to 90%.

Abstract: The present disclosure describes toner compositions comprising an alkyl surface-treated silica, which toners exhibit improved tribo-charging, second transfer efficiency and IQ without impacting color.

Abstract: A developer cartridge provided in an image-forming device has a developer side casing that includes a toner-accommodating chamber and a developing chamber; and a plate wall disposed in the developing chamber for partitioning a thickness-regulating blade from the toner-accommodating chamber. When a thickness-regulating blade scrapes excess charged toner off the developing roller, the plate wall prevents this charged toner from returning to the toner-accommodating chamber. A flexible wiper for cleaning toner detection windows is attached to an agitator for stirring toner in the toner-accommodating chamber via a fixing member. The fixing member includes a support plate and a gripping plate disposed opposite each other with a slit formed therebetween. The wiper is inserted into the slit and is fixed to the fixing member when a boss protruding from a restricting plate becomes inserted into a through-hole formed in the wiper.

Abstract: An electrostatic charge image developing toner includes: toner particles; and an external additive having an average particle diameter of from about 70 nm to about 420 nm, an average circularity of equal to or less than about 0.9, and a standard deviation of the circularity of greater than 0.2.

Abstract: A toner, including a lactone compound having not less than 14-membered rings; and a resin including a crystalline polyester unit.

Abstract: A carrier for developing an electrostatic latent image, including a particulate core material having a magnetism having developed spontaneous magnetization; and a covering layer comprising an electroconductive material, covering the surface of the particulate core material, wherein the carrier has an electrical resistivity Log R [?cm] of from 8.0 to 12.

Abstract: Liquid electro-photographic (LEP) printers having a coating disposed thereon, LEP printers having a compound such as fluorosurfactant in the resin to make one or more parts of the LEP printer, and the like, are disclosed.

Abstract: A developer according to an embodiment includes toner particles, wherein the toner particles contain an amorphous polyester resin, a crystalline polyester resin, a coloring material, and a charge control agent containing metal elements of aluminum and magnesium, and have an endothermic peak temperature as measured by a differential scanning calorimeter (DSC) of from 90 to 100° C. and an acid value of from 9 to 19 mgKOH/g.

Abstract: An image forming method includes charging an image holding member; forming an electrostatic latent image on a surface of the image holding member; developing the electrostatic latent image formed on the surface of the image holding member with a toner or an electrostatic image developer to form a toner image; transferring the toner image formed on the surface of the image holding member onto a surface of a transfer-receiving material; fixing the toner image by pressurization without heating; feeding at least one photoreactive component to the toner or toner image; and irradiating the toner image with ultraviolet rays, wherein the toner satisfies the relationship of the following relational expression (1): TB(30)?100<TA(30)??(1) wherein TB (30) and TA (30) are defined in the specification.

Abstract: A toner for developing an electrostatic image, contains a binder resin having an acid value of from approximately 10 mgKOH/g to approximately 20 mgKOH/g and carbon black having a surface carboxyl group density of from approximately 2×10?6 mol/m to approximately 8×10?6 mol/m2, and is prepared in an aqueous medium.

Abstract: An electrostatic image developing toner including: first toner particles which contain a first binder resin and a photoluminescent pigment; and second toner particles which contain a second binder resin and do not contain a photoluminescent pigment, wherein the proportion of the second toner particles is in a range from 5% by number to 80% by number with respect to a total number of all toner particles.

Abstract: A toner includes a coloring agent, a binder resin comprising a crystalline resin having a urethane skeleton and/or urea skeleton, and a releasing agent (a microcrystalline wax). A development agent, a process cartridge, and an image forming apparatus employ the toner to form images on recording media electrophotographically.

Abstract: The present invention relates to: a composition for label base containing a polyester resin having a repeating unit formed by condensation of an aliphatic dicarboxylic acid and an aliphatic diol; a method for producing a label base containing developing the composition for label base to form a solid image having a label shape, transferring the solid image onto a pressure-sensitive adhesive layer side of a release paper, and fixing the transferred solid image on the pressure-sensitive adhesive layer by heat and pressure application into a film shape; and a label containing the label base and a label image provided thereon obtained by transferring a toner image to the label base and fixing the transferred toner image to the label base by heat and pressure application

Abstract: A developing device is disclosed which includes a developing tank, a developing roller, a carrying member, and a filter. Rotation of the developing roller causes a first airflow directed from the outside of the developing tank through an air path to the inside of the developing tank. Rotation of the carrying member causes a second airflow directed from below in an upward direction inside the developing tank. Collision between the first airflow and the second airflow causes a third airflow directed from the inside of the developing tank through the filter to the outside of the developing tank and further from the outside through the filter back to the inside of the developing tank. This arrangement prevents not only filter clogging but also a toner leak to the outside of the developing device.

Abstract: According to an embodiment, provided is a developer, which is used for a full-color image forming apparatus, wherein the developer includes a monochrome toner and a color toner, each including a coloring material, an amorphous polyester resin, a crystalline polyester resin, and an ester wax which includes ester compounds having an alkyl group and also having a carbon number of from 32 to 48, the amorphous polyester resin to be blended in the monochrome toner has a melting point (Tm2) of from 140 to 155° C. and the amorphous polyester resin to be blended in the color toner has a melting point (Tm1) of from 115 to 130° C., and the Tm1 and the Tm2 satisfy the following formula (1): 10(° C.)?Tm2?Tm1?40(° C.).

Abstract: An electrostatic latent image developing toner contains a binder resin, a colorant, europium, and bismuth.

Abstract: An electrostatic charge image developing toner includes toner particles and an external additive. The toner particles have a moisture content of from 0.1 mass % to 5.0 mass %, and the external additive has a volume average particle diameter of from about 70 nm to about 400 nm and an average circularity of from 0.5 to 0.9.

Abstract: A manufacturing apparatus provided with a rotary stirring section and a powder passage is used to manufacture the resin-layer coated carrier. At a fine resin particle adhering step, a magnetic base particle and a fine resin particle are inputted into the powder passage with the rotary stirring section rotating and the fine resin particle is adhered onto the surface of the magnetic base particle. At a spraying step, at least a liquid that plasticizes the fine resin particles is sprayed with spray gas from a spraying section on the magnetic base particle and the fine resin particle which are in a fluidized state in the powder passage. At a film-forming step, rotation by the rotary stirring section is continued to fluidize the magnetic base particles and the fine resin particles until the fine resin particles adhered to the magnetic base particles are softened to form a film.

Abstract: An electrostatic charge image developing toner includes: toner particles; and an external additive. The external additive contains sol-gel silica having a volume average particle diameter of from about 70 nm to about 400 nm and an average circularity of from about 0.5 to about 0.9, and a dielectric loss factor of the toner is from about 5×10?3 to about 30×10?3 when the toner is kept for 24 hours under the environment of a temperature of 28° C. and a humidity of 85%.

Abstract: A latent electrostatic image developing carrier including: core particles each having magnetism; and a coating layer covering each of the core particles, wherein the latent electrostatic image developing carrier has a shape factor SF-2 of 115 to 150 and has a bulk density of 1.8 g/cm3 to 2.4 g/cm3, wherein the core particles have a shape factor SF-2 of 120 to 160 and have an arithmetic mean surface roughness Ra of 0.5 ?m to 1.0 ?m, and wherein the coating layer contains a resin and a filler and an amount of the filler contained in the coating layer is 50 parts by mass to 500 parts by mass per 100 parts by mass of the resin contained in the coating layer.

Abstract: A toner including a colorant and a first binder resin is provided. The first binder resin has first and second glass transition points at a temperature Tg1 of ?20 to 20° C. and a temperature Tg2 of 35 to 65° C., respectively, measured by a differential scanning calorimeter at a heating rate of 5° C./min. A ratio h1/h2 of a baseline displacement h1 observed in the first glass transition point to a baseline displacement h2 observed in the second glass transition point is less than 1.0. The first binder resin has a structure in which a first phase is dispersed in a second phase. The first and second phases consist of portions having larger and smaller phase difference values, respectively, than an intermediate value between maximum and minimum phase difference values in a binarized phase image obtained by an atomic force microscope with a tapping mode method.

Abstract: A method of forming an image on a substrate with an electrophotographic photoreceptor and a toner, wherein the electrophotographic photoreceptor has an electroconductive substrate; the electroconductive substrate has a surface roughness Ra of from 0.01 ?m to 0.3 ?m; the toner contains toner matrix particles formed in an aqueous medium, has a volume median diameter (Dv50) of from 4.0 ?m to 7.0 ?m; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m satisfies: Dns?0.233EXP(17.3/Dv50) (1) where Dv50 is the volume median diameter (?m) of the toner, and Dns is the percentage in number of toner particles having a particle diameter of from 2.00 ?m to 3.56 ?m.

Abstract: Silica particles have a volume average particle diameter in a range of from about 80 nm to about 300 nm, an average degree of circularity in a range of from about 0.920 to about 0.935, and a geometric standard deviation of the degree of circularity in a range of from about 1.02 to about 1.15.

Abstract: A toner manufacturing method, a toner obtained by the method, a one-component developer, a two-component developer, a developing device and an image forming apparatus are provided. By using a toner manufacturing apparatus including a powder passage, a spraying section for spraying a predetermined substance in the powder passage and a rotary stirring section, provided in the powder passage, and stirring particles in the powder passage to apply impact force to the particles so that the particles are fluidized in the powder passage, performed are a stirring step S3 of fluidizing toner core particles with fine inorganic particles adhering to the surfaces thereof and fine resin particles in the powder passage as the powder by the rotary stirring section, and a spraying step S5 of spraying a volatile liquid which softens fine resin particles as a predetermined substance by the spraying section.

Abstract: An electrophotographic carrier includes a magnetic core material and a resin layer that coats the magnetic core material, the resin layer comprising a resistance control agent and a polymer including a repeating unit derived from an alicyclic group-containing methacrylic ester, the resin layer including a monomer as a base material of the repeating unit in the polymer in an amount of from about 0.5% by weight to about 3.0% by weight relative to the total amount of the resin layer.

Abstract: There are provided a toner manufacturing method of manufacturing a toner which has excellent characteristics such as fluidity and preservation stability and in which a resin layer having uniform thickness is formed on a surface of tone core particle, a toner obtained by a method thereof, a one-component developer, a two-component developer, a developing device, and an image forming apparatus. By using a toner manufacturing apparatus, a stirring step S3 is performed, and during rotation of a rotary shaft section, after a completion of inputting the fine resin particles into a powder passage, and within a period satisfying 1.7?(load F?load F0)/(load Fcore?load F0)?5.7, a spraying step S4 is started.

Abstract: A developer carrying member having less environmental dependence is provided. The developer carrying member has a substrate and a resin layer, which resin layer contains an acrylic resin; the acrylic resin having a unit (1) represented by the following formula (1) and a unit (2) represented by the following formula (2). In the formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents an alkylene group having 1 to 4 carbon atoms, and an asterisk * represents the part of linkage to the part shown by a double asterisk ** in the formula (2). In the formula (2), R3 represents a hydrogen atom or a methyl group; R4 represents an alkylene group having 1 to 4 carbon atom(s); R5, R6 and R7 each represent an alkyl group having 1 to 18 carbon atoms; A? represents an anion.

Abstract: A developing device including a developer bearing member rotatable while bearing developer on a surface thereof, a rotary body having a rotary shaft, a casing that contains the developer supplied to the surface of the developer bearing member to accommodate at least a portion of the rotary body, a rotary gear having a rotary shaft parallel to the rotary shaft of the rotary body and disposed outside a lateral wall of the casing to support an end of the rotary shaft of the rotary body, and a stationary shaft member fixed to the lateral wall of the casing to rotatably support the rotary gear. An axial center of the stationary shaft member is collinear with an axial center of the rotary shaft of the rotary body.

Abstract: A toner including a resin particle (C) is provided. The resin particle (C) includes a resin particle (B) and a resin particle (A). The resin particle (B) includes a resin (b). The resin particle (A) or covering layer (P) includes a resin (a). The resin particle (A) or covering layer (P) is adhered to a surface of the resin particle (B). The resin (a) is a polyester resin. The resin (a) has a total acid value of 15 to 36 mgKOH/g. The resin particle (A) or covering layer (P) has a surface acid value of 10 to 27 mgKOH/g.

Abstract: The present invention relates to a developer carrying member which includes a substrate and the resin layer formed on the surface of the substrate, wherein the resin layer is obtained by thermally curing the coating material composition including at least the following (A) to (E): (A) a thermosetting resin as a binder resin; (B) an alcohol as a solvent, containing 1 to 4 carbon atoms; (C) a resin including the unit represented by the following formula (1); (D) graphitized carbon black having a graphite (002) lattice spacing of 0.3370 nm or more and 0.3450 nm or less as measured by X-ray diffraction; and (E) acid carbon black having a pH of 5.

Abstract: Methods and apparatus to develop an electrostatic latent image using conductive particles, such as carbon and metal particles with a low resistance value, without treating the surface with insulation membrane or other insulators that generate impurities in the conductive material printed by the imaging system.

Abstract: A developing device includes a developing member for developing an electrostatic latent image by adhering developer on an image carrier; a feeding member for feeding the developer to the developing member; and an interposing member that is interposed between the developing member and the feeding member during a period of when the developing device is not being used.