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| Number | Title | Issue Date |
| 8182972 | Developer, developer storage unit, developing device, and image forming apparatus Developer includes toner formed of base particles containing at least a binder resin. The base particles have surfaces coated with an additive agent, and the toner has a volume average particle size between 3.9 μm and 6.1 μm. The developer further includes agglome... | 05/22/2012 |
| 8137885 | Hybrid toner and method of preparing the same A hybrid toner includes micro cylinders, cores inserted into the micro cylinders, and an external addition layer covering the micro cylinders to which the cores are inserted. The hybrid toner prevents a toner blocking phenomenon, image contamination, and low storage... | 03/20/2012 |
| 8092968 | Toner, method of manufacturing toner, developer, two-component developer, developing device, and image forming apparatus The toner includes a plurality of toner particles containing a binder resin and a colorant. In toner particles, according to measurement by a flow particle image analyzer, the content of small size particles having a circle-equivalent diameter of 0.5 to 2.0 μm is 5... | 01/10/2012 |
| 8084179 | Electrostatic image developing toner having specific variation coefficient of number distribution, two-component developer, image forming method and process cartridge A toner including: toner particles which include: a colorant, a releasing agent, and a binder resin. The number average particle diameter of the toner particles is in the range of from 3.5 μm to 6.5 μm, wherein the number average particle diameter is determined by... | 12/27/2011 |
| 8053155 | Toner, two-component developer, developing device, and image forming apparatus A toner has columnar particles manufactured through: a kneading step of melt-kneading toner raw materials including at least binder resin, colorant and a release agent to prepare a kneaded product; a spinning step of extruding the kneaded product from orifices dispo... | 11/08/2011 |
| 8048603 | Toner, two-component developer, developing device, and image forming apparatus A toner is composed of toner particles which contain at least a binder resin, a colorant, and a release agent. As to particle size distribution and particle number distribution of the toner particles, a volume average particle size of the toner particles is set to b... | 11/01/2011 |
| 8021814 | Toner, and oilless fixing method and process cartridge using the toner A toner useful for an oilless fixing method, includes a binder resin; a colorant; and 2.0 to 4.5% by weight of a wax which is soluble in n-hexane, based on a total weight of the toner, wherein the wax is dispersed in the toner, the wax forming wax domain particles (... | 09/20/2011 |
| 7887984 | Toner porous particles containing hydrocolloids The present invention is toner particle that includes a continuous phase of binder polymer and a second phase of hydrocolloid. The particle has a porosity of at least 10 percent. ... | 02/15/2011 |
| 7745086 | Developer material, developer material cartridge, image forming device, and image forming apparatus A developer material includes base particles that contain at least a binder resin and a colorant, and an external additive that covers the surface of the base particles. The developer material has a mean volume particle diameter in the range of 3.9-6.1 μm, and incl... | 06/29/2010 |
| 7459254 | Toner and two-component developer Toner includes aggregated and associated particles formed by mixing in an aqueous medium at least a resin particle dispersion in which resin particles are dispersed, a colorant particle dispersion in which colorant particles are dispersed, and a wax particle dispers... | 12/02/2008 |
| 7435521 | Toner for developing electrostatic image A toner for developing an electrostatic image which has a small particle size essential for attaining a high-quality image, and can output a high-quality image excellent in frictional charging property and free from scumming. The toner for developing an electrostati... | 10/14/2008 |
| 7422833 | Toner, production process thereof, and process for forming image A charge control resin composition for positive or negative charge, which is prepared either by mixing and kneading a charge control resin for positive or negative charge with a colorant, or by mixing and kneading the above combination further with a charge control ... | 09/09/2008 |
| 7419754 | Particle having conductive polymer surface additive Particles, preferably toner particles comprised of at least binder and colorant, are described that include a doped conductive polymer material as a surface additive on the external surface of the particle. The presence of the doped external conductive polymer mater... | 09/02/2008 |
| 7368212 | Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of toner A toner for developing an electrostatic image, includes: a colorant; and a binder resin. The toner has a particle including at least one pore having a diameter of 10 nm or over, and a porosity thereof is in a range from 0.01 to 0.60. ... | 05/06/2008 |
| 7368213 | Toner and fixing device and image forming device using the same A toner containing toner particles having a core-shell structure containing a binder resin, a colorant and a release agent. The toner particles are prepared by dissolving or dispersing at least one of the binder resin and a precursor thereof in an organic solvent or... | 05/06/2008 |
| 7351509 | Toner A toner is disclosed including toner particles containing a binder resin and a colorant. The binder resin contains a vinyl resin. In the high-temperature GPC-RALLS-viscometer analysis of the o-dichlorobenzene-soluble matter of the toner, a weight-average molecular w... | 04/01/2008 |
| 7344812 | Developer for developing electrostatic latent image and image forming apparatus A developer for developing an electrostatic latent image, including a carrier which includes core particles, and a surface layer surrounding each of the core particles and containing an acrylic resin binder; and a toner which includes toner particles and an external... | 03/18/2008 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7323280 | Chemically produced toner and process therefor A toner for developing an electrostatic image comprising toner particles which include a binder resin, a wax and a colorant, wherein the wax has a melting point of between 50 and 150° C., the wax exists in the toner particles in domains of 2 μm or less mean partic... | 01/29/2008 |
| 7318989 | Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method To provide a toner that can provide long-term removability and high-definition images with reduced image layer thickness and densely-packed toner particles, a developer capable of forming high-quality images using the toner, a toner container for containing the tone... | 01/15/2008 |
| 7316880 | Toner for developing a latent image and an image forming method employing the same A toner for developing an electrostatic charge image comprising a resin, a colorant, and a particle having domain-matrix structure and the particle having two or more kinds of metal elements. ... | 01/08/2008 |
| 7312009 | Color toner having low contamination of charging elements The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 μm, a firs... | 12/25/2007 |
| 7300735 | Electrophotographic toner and production method therefor An electrophotographic toner contains a resin, a colorant and a releasing agent. The releasing agent has a solidifying point of from 79° C. to 109° C., and one peak in an endothermic curve measured by a differential scanning calorimeter. A difference between tempe... | 11/27/2007 |
| 7294443 | Toner composition and method for manufacturing the toner composition A toner composition including toner particles including a binder resin; and a colorant, and a charge controlling agent which is at least located on a surface of the toner particles, wherein the toner composition has a spherical degree of from 0.96 to 0.99, and where... | 11/13/2007 |
| 7291435 | Toner binder for electrophotography and toner for electrophotography The present invention provides a toner binder for electrophotography which comprises a polyester resin constituted of an alcohol component containing a polyoxyalkylene ether (A) of a bisphenol and an acid component, and the content of unreacted bisphenols in said po... | 11/06/2007 |
| 7288353 | Toner, developer, image developer and image forming apparatus A toner including toner particles including a binder resin, a colorant, and an inorganic particulate material present on a surface of the toner particles. The toner particles have a surface roughness (Ra) of from 1 to 30 nm, a standard deviation of the surface rough... | 10/30/2007 |
| 7288354 | Toner A toner is composed of toner particles including toner base particles containing at least a binder resin and a colorant, and inorganic fine particles. The toner base particles having a specific circle-equivalent diameter as measured with a flow type particle image a... | 10/30/2007 |
| 7276320 | Surface particle attachment process, and particles made therefrom A method of forming toner particles having surface particles attached thereto includes the steps of aggregating a material of at least one binder material and at least one colorant to produce toner particles, following aggregation, forming a mixture of the surface p... | 10/02/2007 |
| 7252921 | Toners with improved pigment dispersion The invention relates to color toner compositions prepared from an aqueous pigment concentrate dispersion which renders a toner exhibiting improved pigment dispersion, and consequently improved image density and color characteristics. ... | 08/07/2007 |
| 7250240 | Toner, developer, container containing toner, process, cartridge, image forming apparatus and process The toner according to the present invention may be produced from a toner raw composition which comprises a foaming agent, a binder resin and a colorant, wherein the colorant comprises a black metal compound, the foaming agent has a volume-average particle diameter ... | 07/31/2007 |
| 7247416 | Toner processes and compositions thereof The invention relates to color toner compositions prepared from a process for the preparation of a dry toner powder from an aqueous pigment concentrate dispersion comprising: blending at least an aqueous-based pigment concentrate dispersion and a resin to produce a ... | 07/24/2007 |
| 7244537 | Toner for developing an electrostatic charge image and method for its production To provide a toner for developing an electrostatic charge image, which has a good low temperature fixing property whereby it is useful for an image-forming device of a low temperature heat fixing system using a heat roll having a surface temperature of at most 150°... | 07/17/2007 |
| 7241548 | Toner, method for preparing the toner, and image forming method and apparatus using the toner A method for preparing a toner including toner particles, including granulating a toner constituent mixture to prepare toner constituent particles having a polar group with a first polarity on a surface thereof; and mixing a surfactant having a second polarity diffe... | 07/10/2007 |
| 7223508 | Toner for developing electrostatic image, method for producing the toner and image forming method The toner for developing an electrostatic image, includes a toner particle containing a binder resin and a colorant. The colorant has Feret's average horizontal diameter from 10 nm to 500 nm, and 50 number % or more of colorant has a Feret's horizontal diameter of f... | 05/29/2007 |
| 7214459 | Toner for developing electrostatic charged images and developer for developing electrostatic charged images, and image forming method using the same The invention provides a toner for developing electrostatic charged images comprising toner mother particles containing a binder resin and a colorant, and an external additive, wherein: the average of shape factors SF1 of the toner mother particles represente... | 05/08/2007 |
| 7212777 | Image forming apparatus used in electrostatic process An image forming apparatus including an image bearing member to bear a latent electrostatic image, an irradiation device and developing device to develop a toner latent electrostatic image on the image bearing member, a cleaning blade to remove toner particles remai... | 05/01/2007 |
| 7211361 | Image formation apparatus and image formation method An image formation apparatus includes a development unit using a developer support having a conductive surface layer, and a control unit for causing an idle operation of the developer support to be performed at a predetermined timing in a non-print state. ... | 05/01/2007 |
| 7208255 | Powder-coated toner particles and method of making same A color toner composition for developing latent electrostatic images includes nanopowder-coated toner particles, the powder-coated toner particles being characterized in that each comprises a core toner particle having a volume average diameter, Dp, and t... | 04/24/2007 |
| 7186493 | Electrostatic image developing toner and two-component developing agent A toner for developing an electrostatic image is disclosed. The toner comprises toner particles comprising a resin and a colorant, and the toner comprises metal oxide particles have a domain-matrix structure comprising a domain and a matrix. ... | 03/06/2007 |
| 7179576 | Toner and production process for the same A toner includes core particles containing a resin and a colorant, and a coating layer formed over the core particles. The coating layer includes at least one type of coating particles selected from the group consisting of wax-containing resin microparticles contain... | 02/20/2007 |
