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| Number | Title | Issue Date |
| 8139984 | Image forming method and apparatus An image forming apparatus, wherein a surface resistivity Rse[Ω] of a charger and a volume resistivity Rsw [Ω·cm] of the composition having a low softening point satisfy the following relationship: 0.8×10−1Rse | 03/20/2012 |
| 8126369 | Image forming apparatus and process cartridge The invention provides an image forming apparatus, comprising: an electrophotographic photoreceptor, a charging unit, an exposure unit, a developing unit, a transfer unit, a fixing unit, and a cleaning unit; the electrophotographic photoreceptor having an outermost ... | 02/28/2012 |
| 8005404 | Developing device and image forming apparatus having the same A developing device is provided that facilitates developing agent delivery upward. A cartridge includes a developing roller, a supply roller, and a container disposed below the supply roller. The container can have an upper portion formed with an opening having uppe... | 08/23/2011 |
| 7873304 | Image forming apparatus, image forming method, and process cartridge To provide an image forming apparatus including: a latent electrostatic image bearing member; a charging unit configured to charge the surface of the latent electrostatic image bearing member; an exposing unit configured to expose the charged surface of the latent e... | 01/18/2011 |
| 7725058 | Developing unit and image forming apparatus having the same A developing unit capable of dispersing a pressure of developer used therein includes a developer housing to contain the developer and a blocking member to divide the developer housing into a first section and a second section, the second section including a develop... | 05/25/2010 |
| 7725057 | Image forming method and image forming apparatus Disclosed is an image forming method, containing a development step of developing an electrostatic latent image formed on an electrostatic image supporting material using a toner formed on a development sleeve in the from of a thin layer to form a toner image, where... | 05/25/2010 |
| 7489891 | Image-forming apparatus, process cartridge and image-forming method The present invention provides an image-forming apparatus containing an image bearing member, a latent electrostatic image forming unit, a developing unit, in which the developing unit contains an image developing unit, a developer supplying unit, and a developer co... | 02/10/2009 |
| 7480475 | Developing device, and image forming apparatus and process cartridge using the developing device A developing device including a rotating developing roller bearing toner thereon, capable of developing an electrostatic latent image with the toner; a toner layer forming member configured to form a toner layer on the developing roller, and charge the toner of the ... | 01/20/2009 |
| 7435520 | Electrophotographic developing agent Provided is an electrophotographic developing agent including: toner particles including a binder resin, a colorant, and a charge control agent; and an external additive added to the surface of the toner particles, wherein the external additive includes at least one... | 10/14/2008 |
| 7426361 | Developer mixing apparatus having four ribbon blenders A developer mixing apparatus, comprising: a housing including a chamber that holds developer; a first ribbon blender disposed within the chamber and elongate along a first longitudinal axis; and, a second ribbon blender disposed within the chamber and elongate along... | 09/16/2008 |
| 7394997 | Anti-counterfeiting identification system and method for consumables Provided is an article of manufacturer with anti-counterfeit properties a consumable, having taggant nanoparticles dispersed within it. Each taggant nanoparticle has at least one known physical characteristic such as, the taggant nanoparticles being a predetermined ... | 07/01/2008 |
| 7390603 | Image forming apparatus and toner The present invention provides An image forming apparatus having: a negatively chargeable spherical toner; an latent image carrier; a charging member for charging a surface of the latent image carrier uniformly without contacting the latent image carrier; an electro... | 06/24/2008 |
| 7390604 | Negatively chargeable spherical toner, color image forming apparatus, and process for producing negatively chargeable spherical toner The present invention provides a negatively chargeable spherical toner having: a toner mother particle having a binder resin and a colorant, which has: a number average particle size of from 4.5 to 9 μm; a particle size distribution that has an integrated value of ... | 06/24/2008 |
| 7378212 | Image forming method, photoreceptor An image forming method comprising the steps of; forming a latent image by exposing an organic photoreceptor to light, and developing the latent image by a developer containing a toner to form a toner image, wherei... | 05/27/2008 |
| 7379696 | Toner for developing electrostatic image, fixing method for fixing image formed of the toner, and image forming method and process cartridge using the toner A toner including toner particles including a colorant; a binder resin; and a release agent, wherein the binder resin includes a polyester resin (A) having a crystallinity and a specific formula (1), wherein a molar ratio of the ester bond of the crystalline polyest... | 05/27/2008 |
| 7374851 | Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method A toner which includes a toner material, wherein the toner satisfies the following formula: 0° C.≦ΔTm≦20° C. where ΔTm represents Tma (° C.)−Tmb (° C.), Tma (° C.) is ½ flown-out temperature of the toner by a capillary type flow tes... | 05/20/2008 |
| 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 |
| 7356291 | Developing unit, image forming apparatus method that supplies inverse transfer preventing agent with inverse polarity An image forming apparatus of the invention holds a first developing agent of a first color and inverse transfer preventing agent, supplies the first developing agent with predetermined potential, supplies the first developing agent to an image portion of an image c... | 04/08/2008 |
| 7352985 | Image forming apparatus capable of suppressing deterioration of image when toner image on image bearing member is transferred to intermediate transfer member An image forming apparatus having: an image bearing member, which bears an electrostatic image thereon; a developing device, which develops the electrostatic image with toner to form a toner image, and an intermediate transfer member, which is in contact with the im... | 04/01/2008 |
| 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 |
| 7333746 | Developing device and image forming apparatus provided with same A developing device is arranged such that Dg | 02/19/2008 |
| 7333753 | Developer housing design with improved sump mass variation latitude A developer system for developing an image in an electrophotographic printing machine, including: a developer housing having a toner sump containing developer material; a magnetic development member rotatably mounted in the housing for transferring toner particles t... | 02/19/2008 |
| 7327974 | Electrophotographic toner and image-forming system An electrophotographic toner for visualizing an electrostatic latent image formed by an electrophotographic process, an electrostatic printing process, an electrostatic recording process, etc., which is produced in consideration of the environment and safety. The el... | 02/05/2008 |
| 7316879 | Imaging color toner, color image forming method and color image forming apparatus In an imaging color toner employing a photofixing system, a binder resin, which contains, as a principal component, a polyester resin obtained by mixing a first polyester resin having a softening point Tsp of not lower than 120° C. and lower than 170° C. with a se... | 01/08/2008 |
| 7309554 | Negatively chargeable toner, method for producing the same, and full color image forming apparatus using the negatively chargeable toner A negatively chargeable toner containing: resin particles containing a colorant; and an external additive which coats the surface of the resin particles, wherein the external additive contains; first silica particles having a number mean primary particle size of 5 t... | 12/18/2007 |
| 7300734 | Toner compositions A toner composition comprising a binder, colorant, and a charge control surface additive mixture comprising a mixture of a first titanium dioxide possessing a first conductivity and a second titanium dioxide possessing a second conductivity and which second conducti... | 11/27/2007 |
| 7282315 | Developer, developer cartridge, and image forming apparatus A method of producing a developer includes the steps of: kneading at least a resin and a colorant; reducing the kneaded resin and colorant to coarse powders; adding an additive agent to the coarse powders; reducing the coarse powders with the additive agent to fine ... | 10/16/2007 |
| 7280786 | Electrostatic developing toner An electrostatic developing toner which can effectively suppress image fogging*1 by setting a ratio (d/D) of the average particle diameter D of the toner and the average particle diameter d of iron oxide particles contained in the toner as a colorant to within a pre... | 10/09/2007 |
| 7272348 | Developing method using a developer with a specified degree of compression and shearing stress A developing method using a developing device including at least: a first developer bearing member arranged to be opposed to an image bearing member; and a second developer bearing member arranged on a downstream side of a rotation direction of the image bearing mem... | 09/18/2007 |
| 7264911 | Image forming apparatus and image forming method The invention provides an image-forming apparatus equipped with a toner container containing toner particles and an endless belt circulating in contact with image carriers carrying electrostatic latent images. The image-forming apparatus forms a toner image on a rec... | 09/04/2007 |
| 7263325 | Auger for use in an image forming device A helical auger member for transporting toner in an image forming apparatus. The auger member may be implemented as part of a waste toner removal system for removing toner from a photoconductive member of a toner cartridge. Toner that is removed by a cleaner member ... | 08/28/2007 |
| 7261989 | Toner for developing electrostatic images, developer, image forming method, and image forming apparatus The object of the present invention is to provide a toner which has sufficiently high chargeability and less toner spent to a carrier or the like even when several tens of thousands of image sheets are output, is capable of keeping high-charge property and flowabili... | 08/28/2007 |
| 7260348 | Image forming apparatus having a toner-supplying roller and a developing roller configured to meet a specific parameter An image-forming apparatus includes a toner-supplying roller and a developing roller that receives toner from the toner-supplying roller, the toner having either a glass transition point not higher than 67° C. or a softening point not higher than 120° C. The devel... | 08/21/2007 |
| 7252919 | Carrier and developer for latent electrostatic image development, container housing developer, image forming process, image forming apparatus, and process cartridge A carrier for electrostatic development contains a core particle and a coating layer covering the core particle, and the core particle is a ferrite particle containing at least one of Zr in an amount of 0.005% by mass to 5% by mass and Bi in an amount of 0.001% by m... | 08/07/2007 |
| 7252914 | Toner for electrophotography and developer for electrophotography using the same, process cartridge, apparatus for forming image, and method for forming image A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak... | 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 |
| 7245311 | Image forming apparatus A photosensitive body has a photosensitive layer. An optical scanning device has a deflector deflecting a light flux emitted from a light source, and scans the surface of the photosensitive body by the thus-deflected light flux. A dot is formed at a center between a... | 07/17/2007 |
| 7237732 | Process for preparing ground resin particles and apparatus for preparing the same A process for preparing ground resin particles is provided by modifying a jet mill with opposed fluidized bed. By using a jet mill having a plurality of jet nozzles disposed at predetermined positions in a barrel of a grinding chamber toward the injection point of t... | 07/03/2007 |
| 7236726 | Reusable developer cartridge and image forming apparatus for facilitating the removal of toner during refilling A developer cartridge includes a casing, an agitator, and a developing roller. The casing has a first inner space serving as a developer accommodating chamber that accommodates developer and a second inner space serving as a developing chamber in communication with ... | 06/26/2007 |
| 7236720 | Image forming apparatus and process cartridge An image forming apparatus is disclosed that is able to improve transfer efficiency and image quality. The image forming apparatus includes an organic photo-conductor with latent images formed thereon, and a developing unit for developing the latent images. The orga... | 06/26/2007 |
