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| Number | Title | Issue Date |
| 8168363 | Toner and producing method thereof, developer, two-component developer, developing device and image forming apparatus A toner is so configured as to satisfy the following conditions: (b)/(a) is from 0.90 to 1.02, (a) is from 140 to 150 and the average value in the entire toner particles of a shape factor SF-2 of the toner particles is larger than 140, where (a) represents a shape f... | 05/01/2012 |
| 8158320 | Toner and process of preparing the same A toner includes a core containing a binder resin, wax, and a colorant, and an external additive layer coating the core, wherein the core is prepared such that it is extruded and extended to have a fiber phase, and is pulverized. The toner has an improved fixing abi... | 04/17/2012 |
| 8148040 | Toner and method of manufacturing the same, two-component developer, developing device, and image forming apparatus In a toner at least containing a binder resin and a colorant, a value obtained by dividing a particle size D50p by a particle size D84p is 1.43 or more and 1.64 or less, wherein D50p and D84p respectively represent particl... | 04/03/2012 |
| 8137886 | Magnetic carrier, two-component developer and image forming method A magnetic carrier is provided which uses a toner having high coloring power and enables development to be performed at low electric field intensity and can form high quality images while keeping gradation characteristics. The magnetic carrier includes magnetic carr... | 03/20/2012 |
| 8053156 | Toner, and toner production process In a chart of molecular weight distribution measured of a toner, i) the toner has a main peak in the region of molecular weight of 16,000 to 60,000, and ii) where the molecular weight at the main peak is represented by M1, and where the height at the molecular weigh... | 11/08/2011 |
| 8043780 | Toner, and developer, developing apparatus, process cartridge, image forming apparatus and image forming method A toner that includes toner base particles including a binder resin and a colorant, wherein the toner base particles have a surface roughness (Ra) of 18 nm to 50 nm and a standard deviation (RMS) of the surface roughness of 0.5 nm to 9.9 nm. A developer, a developin... | 10/25/2011 |
| 7858283 | Magnetic carrier and two-component developer A magnetic carrier which has magnetic carrier particles each having at least porous magnetic core particles and a resin, in which, in a backscattered electron image of the magnetic carrier particles, photographed with a scanning electron microscope as taken at an ac... | 12/28/2010 |
| 7794909 | Toner An object of the present invention is to provide a spherical toner that has a sharp particle size distribution and a small particle diameter. This is a capsule-type toner that exhibits an excellent low-temperature fixability, while at the same time having a high off... | 09/14/2010 |
| 7771910 | Image forming method An image forming method is disclosed, comprising (a) forming a toner image on an image forming body, (b) transporting the image forming body to a transfer region, (c) overlapping an image supporting body onto the image forming body, (d) radiating ultrasonic waves on... | 08/10/2010 |
| 7759040 | Image forming method A cleaner-less image forming method includes forming an electrostatic latent image on a electrostatic latent image carrying member; developing the electrostatic latent image with a developer comprising a toner and a carrier to form a toner image; and transferring th... | 07/20/2010 |
| 7736826 | Toner, developer and image forming apparatus A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2): B≦14 when 155 | 06/15/2010 |
| 7713670 | Developer, and image forming method using the developer A developer for an electrophotographic tandem image forming method is provided that contains a toner; and a carrier, wherein the toner has a shape factor SF-1 of from 120 to 160, an average circularity of form 0.93 to 0.98, a weight-average particle diameter (D4) of... | 05/11/2010 |
| 7713671 | Semispherical toner having plural dents A toner, which is semispherical and has plural dents on the surface, including a binder resin; and a pigment, wherein a circle circumscribing a circular profile of the toner provides an average envelopability (AE) of 10 to 10,000 particles thereof of from 74 to 84%,... | 05/11/2010 |
| 7592115 | Carrier for electrostatic latent image developer, production method thereof, electrostatic latent image developer, and image-forming device A carrier for electrostatic latent image developer, including a core material and at least two or more resin-coated layers formed on the surface of the core material, wherein the resin-coated layers include a siloxane bond-containing coating resin containing an orga... | 09/22/2009 |
| 7588874 | Toner for developing electrostatic image used in electrophotography and process for producing the same A toner for developing an electrostatic image is provided, which contains at least a binder resin, a colorant and a releasing agent, the releasing agent, has an endothermic peak temperature measured by a differential scanning calorimeter of from 60 to 100° C., and ... | 09/15/2009 |
| 7566521 | 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... | 07/28/2009 |
| 7473508 | Toner, developer and image forming apparatus A toner composition including toner particles including at least a binder resin; and a colorant, wherein the toner composition satisfies at least one of the following relationships (1) and (2): B≦14 when 155 | 01/06/2009 |
| 7459255 | Toner and developer, toner container, process cartridge, image-forming apparatus, and image-forming method using the same An object of the present invention is to provide a toner having small-sized and potato-shaped particles created from multiple coherent spherical particles for excellent cleaning ability and high image quality, an image-forming method that realizes high image quality... | 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 |
| 7429442 | Toner, and two component developer and image forming apparatus using the toner A toner is provided that contains a binder resin; a colorant; a release agent; and an external additive, wherein the toner has an average circularity of from 0.940 to 0.965 and a crater having a depth of from 0.02 to 0.1 μm, and wherein the crater has an amount of ... | 09/30/2008 |
| 7422832 | Magnetic toner Provided is a magnetic toner comprising magnetic toner particles each comprising at least a binder resin and a magnetic iron oxide, the magnetic toner being excellent in developability and environmental stability, and being capable of reducing a toner consumption. A... | 09/09/2008 |
| 7419756 | Dry toner, method for manufacturing the same, image forming apparatus, and image forming method A dry toner contains fine particles having average sphericity of 0.93 to 0.99, a content of the fine particles having a particle diameter of 2 μm or less in the dry toner is 20% by number or less. A method for manufacturing a dry toner includes a process for disper... | 09/02/2008 |
| 7402367 | Electrostatic image developing toner and image forming method A toner comprising a compound represented by the following formula: R1O(R2O)nH where R1 is an aliphatic hydrocarbon group having 10 to 22 carbon atoms or a distyrene-substituted phenyl group; R2 | 07/22/2008 |
| 7396630 | Toner, developer including the toner, and method for fixing toner image A toner composition including toner particles including a binder resin including a modified polyester resin, and a second resin having a weight average molecular weight of from 2,000 to 10,000; a colorant; a release agent; and a particulate material which is present... | 07/08/2008 |
| 7384722 | Method for preparing functional particulate organic material, toner using the functional particulate organic material, and image forming method and apparatus using the toner A method for preparing a functional particulate organic material, including providing a suspension of a particulate organic material having an acid group on a surface thereof; reacting a metal cation with tri- or more-valence with the acid group; and reacting at lea... | 06/10/2008 |
| 7378213 | Image forming process and image forming apparatus A process contains in which heating and fixing an image of a toner on a recording medium is performed by heating one or more heat-transfer media by a heating element, and pressing the recording medium bearing the toner image to one of the heat-transfer media. At lea... | 05/27/2008 |
| 7374848 | Toner and method or preparing the toner A toner including a binder; a colorant; and a wax, wherein the binder includes a polyester resin; and a reaction product of a polymer having a group capable of reacting with an active hydrogen with a compound having an active hydrogen, wherein the polyester resin in... | 05/20/2008 |
| 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 |
| 7364828 | Toner for electrophotography, method of manufacturing the toner, developer, development method, transfer method, and process cartridge using the toner The method of manufacturing toner for electrophotography includes the steps of dissolving or dispersing a toner composition containing a resin and a coloring agent into polymerizable monomers to provide a solution or a dispersed system, emulsifying the solution or t... | 04/29/2008 |
| 7364791 | Developer carrying member and developing method by using thereof The present invention relates to a developer carrying member for carrying a developer having at least a substrate and a resin-coated layer formed on the surface of the substrate. The developer carrying member is the one which carries a one-component developer to vis... | 04/29/2008 |
| 7364826 | Electrostatic latent image developing toner, and method for manufacturing electrostatic latent image developer and electrostatic latent image developing toner There is provided an electrostatic latent image developing toner including a binder resin, a colorant, and a release agent, wherein the shape factor SF1 of the toner is within the range from 110 to 140, the volume average particle size of the toner is within the ran... | 04/29/2008 |
| 7358023 | Method for producing toner, toner and printed matter The invention provides a method for producing a toner comprising: a step of preparing a powder for production of the toner from a raw material containing a resin as a main component, a coloring agent, and a crystalline polyester having higher crystallinity than the ... | 04/15/2008 |
| 7358021 | Hybrid toner processes A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; a... | 04/15/2008 |
| 7354648 | Electrically conductive non-stick coating A non-stick coating includes fluoropolymer and electrically conductive mica. The coating may be used on rollers in printing machines to help dissipate static electricity. ... | 04/08/2008 |
| 7344814 | Toner and image-forming method therewith A toner for an image-forming apparatus and method which apparatus has a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after transfer; the toner being a mixture of a colored polymer particle and an ... | 03/18/2008 |
| 7344815 | Toner for forming electrostatic image A toner for developing an electrostatic image is disclosed. The arithmetic average of shape coefficient SF-1 of the toner particles calculated by Equation 1 is from 125 to 170 and a ratio of that to an arithmetic average of the shape coefficient SF-2 of the toner pa... | 03/18/2008 |
| 7341812 | Photosensitive member having two layer undercoat An imaging member having a substrate, an electroconducting layer having an electroconducting particle of a core and outer shell, an interfacial layer, and a charge transport layer with charge transport materials dispersed therein. ... | 03/11/2008 |
| 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 |
| 7323281 | Toner, developer including the toner, container containing the toner or the developer and method of producing the toner A toner comprising toner particles comprising a first binder resin; a second binder resin different from said first binder resin and having a glass transition temperature of from 40 to 55° C.; a colorant; and a release agent, and a particulate resin material which ... | 01/29/2008 |
| 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 |
