Patent application number | Description | Published |
20080227000 | IMAGE FORMATION METHOD - An image formation method including charging an image bearing member; irradiating the surface of the image bearing member to form a latent electrostatic image thereon; developing the latent electrostatic image with a two component developing agent including a carrier and a toner including a mother toner particle and an external additive by a development device including a stirring and transfer device for transferring and stirring the developing agent; transferring the developed image to a transfer medium; and fixing the developed image on the transfer medium, wherein the toner includes a polyol-based resin as a binder resin, the polyol based resin having multiple hydroxyl groups in a molecular chain thereof in which the ratio (EX/OH) of epoxy group (EX) to hydroxyl group (OH) is from 0.990 to 1.010, the stirring and transfer device satisfies the following relationship (I): 1.0×10 | 09-18-2008 |
20080227003 | IMAGE FORMING METHOD AND TONER FOR DEVELOPING LATENT ELECTROSTATIC IMAGE - Disclosed is a developer containing toner and carrier, the toner containing as a binder resin a polyol resin having a plurality of OH groups in a molecule chain having an EX/OH ratio between epoxy groups (EX) and OH groups (OH) of 0.990 to 1.010. The rotational speed α, pitch β and conveyance path length γ of an stirring and conveying unit satisfies 1.0×10 | 09-18-2008 |
20080286679 | TONER PREPARATION METHOD AND APPARATUS, AND TONER PREPARED THEREBY - A method of preparing a toner, including periodically dripping and discharging droplets of a toner constituent liquid comprising a resin and a colorant with a dripper comprising a thin film comprising plural nozzles configured to discharge the droplets, and an electromechanical converter configured to oscillate the thin film; and solidifying the droplets to form toner particles, wherein the nozzle has an aperture discharging the droplet, having a circular or an ellipsoidal cross-sectional shape and cross-sectional area smaller than a cross-sectional area of another aperture contacting the toner constituent liquid. | 11-20-2008 |
20080292985 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE ELECTROPHOTOGRAPHIC TONER - Provided are an electrophotographic toner and a method for producing the electrophotographic toner that satisfy high image quality, cleaning stability, and high productivity. | 11-27-2008 |
20090117486 | METHOD OF PREPARING TONER AND THE TONER, AND DEVELOPER AND IMAGE FORMING METHOD USING THE TONER - A method of preparing a toner, including periodically discharging a toner constituent liquid from plural nozzles having the same aperture diameter with a mechanical oscillator, wherein the toner constituent liquid includes:
| 05-07-2009 |
20090239170 | METHOD FOR PRODUCING TONER, AND TONER - A method for producing a toner, the method including discharging a toner composition liquid from a plurality of nozzles to form liquid droplets thereof, the toner composition liquid being prepared by dissolving or dispersing in a solvent a toner composition containing at least a binder resin, a colorant, an acid-modified hydrocarbon wax and an unmodified hydrocarbon wax, the waxes serving as a releasing agent, and solidifying the liquid droplets so as to form solid particles. | 09-24-2009 |
20090317738 | METHOD AND APPARATUS FOR PRODUCING TONER - A method for producing a toner, including ejecting a toner composition liquid containing at least a resin and a colorant periodically from a plurality of nozzles into a chamber using a vibration unit, so as to form droplets in a gas phase; and solidifying the droplets, wherein the droplets are transported by transport air flow selected from at least one of vertical downward air flow and rotational air flow, and the method can prevent toner particles from aggregation. | 12-24-2009 |
20100003613 | TONER, METHOD OF PRODUCING TONER, AND IMAGE FORMING METHOD - A toner produced by a method including dissolving or dispersing toner components comprising a resin, a colorant, and a release agent in a solvent to prepare a toner components liquid, discharging the toner components liquid from multiple nozzles provided on a thin film by vibrating the thin film by a mechanical vibration unit to form liquid droplets, and drying the liquid droplets into solid particles of the toner. The particle diameter distribution that is a ratio of a weight average particle diameter to a number average particle diameter of the toner is between 1.00 and 1.15, and a weight average particle diameter of the release agent in the toner is between 1% and 30% of an aperture diameter of the nozzle. | 01-07-2010 |
20100021209 | TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - A toner produced by dissolving or dispersing toner components comprising a binder resin, a colorant, and a charge controlling agent in an organic solvent to prepare a toner components liquid, forming liquid droplets of the toner components liquid in a gas phase, and solidifying the liquid droplets into toner particles of the toner. The charge controlling agent includes a polycondensation reaction product of a phenol with an aldehyde. | 01-28-2010 |
20100055590 | TONER, METHOD FOR PRODUCING TONER, AND DEVELOPER - A method for producing a toner including periodically forming and discharging liquid droplets of a toner composition liquid containing at least a resin, a releasing agent and a colorant from a plurality of nozzles formed in a thin film which is provided in a reservoir for the toner composition liquid, by vibrating the thin film using a mechanically vibrating unit, and forming toner particles by solidifying the liquid droplets, wherein the forming toner particles comprises primarily drying the liquid droplets under a stream of dry gas containing an organic solvent whose partial pressure is equal to or higher than 1/10 of a saturated vapor pressure thereof but is equal to or lower than the saturated vapor pressure, the saturated vapor pressure being that at a drying temperature; and secondarily drying the primarily dried liquid droplets for solidification while the organic solvent is being evaporated. | 03-04-2010 |
20130196266 | TONER, DEVELOPER, AND IMAGE FORMING APPARATUS - A toner produced by dissolving or dispersing toner components comprising a binder resin, a colorant, and a charge controlling agent in an organic solvent to prepare a toner components liquid, forming liquid droplets of the toner components liquid in a gas phase, and solidifying the liquid droplets into toner particles of the toner. The charge controlling agent includes a polycondensation reaction product of a phenol with an aldehyde. | 08-01-2013 |