Patent application number | Description | Published |
20080261131 | TONER, IMAGE FORMING APPARATUS USING THE SAME, IMAGE FORMING METHOD USING THE SAME, AND PROCESS CARTRIDGE - A toner that is excellent in low-temperature fixing property, offset resistance, storage stability, charge rising property, charge stability with time and pulverizability and allows for forming high-quality images over a long period of time. The toner contains at least a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent contains an aromatic oxycarboxylic acid metal compound having a trivalent or more central metal, the binder resin comprises a polyester resin (A) having a softening point Tm (A) of 120° C. to 160° C. and a polyester resin (B) having a softening point Tm (B) of 80° C. to less than 120° C., and at least any one of the polyester resins (A) and (B) contains 1,2-propane diol at 65 mol % or more in a divalent alcohol component and can be obtained by condensation polymerizing an alcohol component substantially composed of only an aliphatic alcohol with a carboxylic acid component. | 10-23-2008 |
20090075195 | IMAGE FORMING METHOD, IMAGE FORMING APPARATUS, AND TONER - A toner is provided including a mother toner including a crystalline polyester resin, an amorphous resin, and a wax, and an external additive in an amount of from 0.30 to 0.55 parts by weight based on 100 parts by weight of the mother toner. The toner satisfies the following equation 0.36≦(2.77×C/R+1.97×W/R)/X≦1.85, wherein each of C, W, and R represents a height of an absorbance peak specific to the crystalline polyester resin, the wax, and the amorphous resin, respectively, measured by a FT-IR ATR method, and X represents an amount (parts by weight) of the external additive. An image forming method and apparatus using the toner are also provided. | 03-19-2009 |
20090142677 | ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND APPARATUS - An image forming method including electrostatic image forming step, developing step, transferring step, fixing step and oil application step for applying an oil to a fixing member, wherein the toner includes a binder resin, a colorant and a wax, and the relationship (A2/A1)×100<200 is satisfied, wherein A1 represents the area of the oil dropped on a pellet of the toner measured 30 seconds after dropping the oil, and A2 represents the area of the dropped oil measured 24 hours after dropping the oil. Alternatively, the relationships (X1−X2)<0.5 atomic percent, X1>1.0 atomic percent, and X2>1.0 atomic percent, are satisfied, wherein X1 and X2 represent amounts of Si atoms of the silicone oil measured by subjecting the toner image to X-ray photoelectron spectroscopy at times 5 minutes and 24 hours, respectively, after fixing the toner image. | 06-04-2009 |
20090155706 | IMAGE FORMING APPARATUS, TONER, AND PROCESS CARTRIDGE - An image forming apparatus including a fixing device to fix a toner image on a recording medium including a heat roller and an oil applicator to apply a silicone oil to the heat roller, having a system speed of from 500 to 1700 mm/sec, and using a toner including a binder resin including a crystalline polyester resin and an amorphous polyester resin; a fatty acid amide compound; and a colorant, wherein a ratio (W/R) of a height (W) of a peak at a wavenumber of 1638 cm | 06-18-2009 |
20090297973 | TONER, DEVELOPER, AND IMAGE FORMING METHOD - The present invention provides a toner which includes at least a binder resin, and a colorant, wherein the toner has a concentration of radioactive carbon isotope C-14 of 10.8 pMC or higher. | 12-03-2009 |
20100067958 | IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - An image forming method including forming an electrostatic latent image on a photoreceptor; developing the latent image with a developer including a toner using a center-feed developing device to form a toner image; transferring the toner image onto a receiving material; and fixing the toner image using a fixing member coated with silicone oil. The toner includes at least a binder resin; a colorant; and a quaternary ammonium salt having a specific formula, wherein when the toner is dispersed in ethanol using ultrasonic waves, the dispersion has a turbidity of from 0.4 to 1.0 when the turbidity is determined using a haze meter. An image forming apparatus including a photoreceptor; a center-feed developing device using a developer including the toner; a transferring device; a fixing device using a fixing member coated with silicone oil; and a cleaner for the photoreceptor. | 03-18-2010 |
20100068644 | TONER, AND DEVELOPER - The present invention provides a toner which contains at least a binder resin, and a colorant, wherein the binder resin contains a polyester resin (A) obtained by polycondensation of an alcohol component with a carboxylic acid component containing one of a purified rosin and a modified rosin, and a polyester resin (B) obtained by polycondensation of a carboxylic acid with an alcohol component containing a specific alkylene oxide adduct of bisphenol A, and wherein when the carboxylic acid component containing a purified rosin is used in the carboxylic acid component for the polyester resin (A), a mass ratio [(B)/(A)] of the polyester resin (B) to the polyester resin (A) is 2/8 to 6/4. | 03-18-2010 |
20100227267 | METHOD FOR PRODUCING TONER AND TONER - A method for producing a toner, containing: ultrasonically vibrating a liquid toner composition in which a toner material containing at least a binder resin and a colorant is dissolved or dispersed in a solvent; introducing the liquid toner composition to a liquid chamber, and ejecting the liquid toner composition as droplets from an ejecting plate having a plurality of holes and disposed on one surface of the liquid chamber; and drying and solidifying the droplets so as to produce a toner, wherein the ultrasonically vibrating is performed before the introducing the liquid toner composition to the liquid chamber. | 09-09-2010 |
20110014565 | METHOD OF MANUFACTURING TONER - A method of manufacturing a toner including supplying a fluid containing a resin and a coloring agent to a retaining member including a film having multiple discharge orifices, discharging droplets of the fluid from the multiple discharge orifices at a speed of from 2 to 4 m/s by applying a pulse voltage having a trapezoid waveform to a piezoelectric body having a surface provided substantially parallel to the film to move the surface in a direction away from the film relative to a reference position of the surface followed by holding the surface there for a predetermined time, and bringing the surface back to the reference position; and solidifying droplets of the fluid discharged from the multiple discharge orifices to form mother particles. | 01-20-2011 |
20110091245 | ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND APPARATUS - An image forming method including electrostatic image forming step, developing step, transferring step, fixing step and oil application step for applying an oil to a fixing member, wherein the toner includes a binder resin, a colorant and a wax, and the relationship (A | 04-21-2011 |
20110305987 | METHOD FOR MANUFACTURING TONER AND TONER - A method for producing toner particles by ejecting a liquid from at least one ejection hole to form the liquid into liquid droplets, and solidifying the liquid droplets to produce toner particles. The ejecting is accomplished by applying a vibration to the liquid in a liquid column resonance-generating liquid chamber in which an ejection hole is formed to form a standing wave through liquid column resonance, and ejecting the liquid from the ejection hole which is formed in a region corresponding to an antinode of the standing wave to thereby form the liquid into the liquid droplets. Toner produced by the method. | 12-15-2011 |