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| Number | Title | Issue Date |
| 8135314 | Developing device, process cartridge, and image forming apparatus, method of developing latent image A developing device includes a first screw that supplies a developer to a developing roller while agitating/conveying the developer in a first direction, and a screw that collects residual developer from the developing roller, agitates/conveys the residual developer... | 03/13/2012 |
| 8068771 | Image forming apparatus A developing unit includes a developing hopper for storing a dual-component developer. In the developing hopper, an opening portion is formed at the position opposing the outer peripheral surface of a photoreceptor drum. A developing roller for supplying the develop... | 11/29/2011 |
| 8055167 | Image forming apparatus including pressing unit to maintain gap between rollers An image forming apparatus is disclosed. The image forming apparatus includes a photosensitive body, a magnetic roller disposed at a predetermined distance from the photosensitive body, and a donor roller disposed between the photosensitive body and the magnetic rol... | 11/08/2011 |
| 8055168 | Magnet knife assembly for a toner developing device A magnet knife assembly for a toner developing device including a ferromagnetic strip held between like poles (N) of two permanent magnets such that a knife edge portion of the strip projects outwardly beyond the two magnets and is subject to a magnet force that ten... | 11/08/2011 |
| 8023867 | Magnet roller and method for the same, magnetic particle-support member, development device, process cartridge, and image forming apparatus A magnet roller includes a cylindrical roller body including a side surface in which a groove is formed, a magnet body which is disposed in the groove, and a magnetic metal member which is attached to a surface of the magnet body, which is remote from an opening of ... | 09/20/2011 |
| 7917067 | Magnetic field generating member and manufacturing method thereof, magnetic particle support body, image development device, process cartridge and image forming apparatus A magnetic field generating member with high stiffness and small size, an image development device, a process cartridge and an image forming apparatus including the magnetic field generating member as well as a manufacturing method of the magnetic field generating m... | 03/29/2011 |
| 7890028 | Developing device and image forming apparatus comprising the same A developing device and image forming apparatus that can satisfy stability over time in relation to amount of developer carried, and prevent developer retention, deterioration of developer and developing sleeve adhesion, wherein the amount of developer carried per u... | 02/15/2011 |
| 7877047 | Developing device, process cartridge and image forming apparatus to inhibit the increase of the rate of uncharged toner during prolonged operation A developing device, which can inhibit the increase of the rate of uncharged toner caused by long hours of operation and develop an excellent image, and a process cartridge and an image forming apparatus that use such a developing device. A developing sleeve is rota... | 01/25/2011 |
| 7792472 | Developing apparatus and image forming apparatus using same A developing apparatus using a two-component developer constituted by a magnetic carrier and a toner, and an image forming apparatus comprising the developing apparatus. A developing unit and a stirring unit are provided, and in order to suppress toner scattering th... | 09/07/2010 |
| 7773920 | Toner drop suppressing developing apparatus A developing apparatus includes a non-magnetic sleeve installing a magnetic field creating device, a developer carrier that carries and conveys developer including magnetic carrier and toner, and a development casing that contains developer. The development casing i... | 08/10/2010 |
| 7693465 | Image forming apparatus and process cartridge An image forming apparatus and process cartridge which uses a two-component developer comprising a toner and a carrier. By using toner and carrier having a small-particle size, deterioration of the toner fluidity over time can be avoided, and further by maintaining ... | 04/06/2010 |
| 7664439 | Image forming apparatus, and carrier, toner and developer used therein for reducing foggy images An image forming apparatus including an image bearer, a magnetic field generator, a two-component developer bearer, a developing electric field generator, and an image developer. The two-component developer has at least a current speed index (25FRI) of from 0 to 2.0... | 02/16/2010 |
| 7577387 | Developing unit having improved agent recovery and supply system and image forming apparatus using the same A developing unit for an image forming apparatus including an agent carrying member, a supply compartment, a supply screw, a recovery compartment, a recovery screw, an agitation compartment, and an agitation screw. The agent carrying member carries and supplies deve... | 08/18/2009 |
| 7561837 | Electrographic development method and apparatus The invention relates generally to processes for electrographic image development. An electrographic development apparatus is provided wherein a film is adjacent a cylindrical toning shell and a mixture of toner and carrier is particles disposed on the cylindrical t... | 07/14/2009 |
| 7502579 | Developing device using developer of particular properties suitable therefore A developing device is provided with a developer accommodating vessel accommodating developer having as primary components a nonmagnetic toner and magnetic particles referred to as a carrier. The carrier is composed of a magnetic material as a core material that is ... | 03/10/2009 |
| 7477866 | Image forming method and image forming apparatus In an image forming apparatus provided with an organic photoreceptor; a developing device to bring a developing brush in contact with the organic photoreceptor so as to visualize an electrostatic latent image to toner image; a transfer device; and an agent supplying... | 01/13/2009 |
| 7457570 | Image forming apparatus including a magnetic brush developing system using a two-component developer comprising toner and carrier It is an object of the present invention to provide a process unit and an image forming apparatus in which generation of loss of image density due to flying off of developer and the edge effect occurring as a side-effect under developing conditions aimed at improvin... | 11/25/2008 |
| 7457571 | Image forming apparatus and process cartridge An image forming apparatus and process cartridge which uses a two-component developer comprising a toner and a carrier. By using toner and carrier having a small-particle size, deterioration of the toner fluidity over time can be avoided, and further by maintaining ... | 11/25/2008 |
| 7454160 | Developing apparatus including a cylindrical developer carrying member conveying a magnetic mono-component developer A developing apparatus, a process cartridge and an image forming apparatus which form an image whose image density can be maintained, which form a fogged image and which form an image of uneven density within an acceptable range, even when the diameter of a develope... | 11/18/2008 |
| 7444104 | Variable energy development station using a magnet to restrict developer material flow in the development station An improved development station extends the useful life of toner in the housing and increases the number of images developed by the developer supply. The improved development station includes a development station housing having a developer sump, a toner supply for ... | 10/28/2008 |
| 7416828 | Developing method, developing device, and process cartridge and image forming apparatus using the developing device A developing method including forming a magnetic brush of a two component developer comprising a toner and a magnetic carrier; and developing an electrostatic latent image with the magnetic brush, wherein the ratio (Anc/At) of the area (An... | 08/26/2008 |
| 7392000 | Image forming apparatus to control a linear velocity ratio An image forming apparatus having a photoconductive drum to form an electrostatic latent image corresponding to a predetermined image by a laser beam scanned after being electrified to a predetermined electric potential, and a developing roller to rotate together wi... | 06/24/2008 |
| 7386256 | Toner, developer, toner container and latent electrostatic image carrier, and process cartridge, image forming method, and image forming apparatus using the same An image forming method, includes: forming a latent electrostatic image on a latent electrostatic image carrier; developing the latent electrostatic image with a toner to thereby form a visible image; transferring the visible image to a recording medium; and fixing ... | 06/10/2008 |
| 7383003 | Developing apparatus for preventing ghost images and uneven image density A developing apparatus includes a developing roller for developing an image with a developer; a non-rotary magnet roll inside the roller; a blade; and an abutting member abutting against the roller, wherein the following expressions are satisfied: |Vs|>|Vdev|, |Br|/... | 06/03/2008 |
| 7362991 | Image forming apparatus An image forming apparatus having a photosensitive drum bearing an electrostatic image, and a developing sleeve carrying a developer for developing the electrostatic image, the developing sleeve is in non-contact with the photosensitive drum, and is designed to be f... | 04/22/2008 |
| 7362990 | Image forming apparatus There is described an image forming apparatus for forming a high-density image by using the reversal developing method and suppressing an occurrence of irregularities. The apparatus includes an image bearing member, a latent image forming device to form an electrost... | 04/22/2008 |
| 7356292 | Electrostatographic developer unit having multiple magnetic brush rolls with a magnetic restrictor for carrier particle emission control A development station in an electrostatographic imaging machine impedes the flow of carrier particles out of the development station as the developer moves from an upper to a lower magnetic roll. The development station includes a developer housing, for retaining a ... | 04/08/2008 |
| 7356295 | Developer-carrying member having improved transportability, a developing unit, a process cartridge and an image forming apparatus A developer-carrying member to transport a developer having a carrier to a developing area facing an image carrying member in an image forming apparatus includes a sleeve. The sleeve carries the developer. The surface of the sleeve has a maximum roughness Rmax of on... | 04/08/2008 |
| 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 |
| 7349639 | Image forming apparatus and management system An image forming apparatus includes a developing device for developing an electrostatic latent image, formed on an image-bearing member, with toner; a developer supply container which contains developer containing toner and a carrier and is detachably mountable to a... | 03/25/2008 |
| 7343122 | Image forming apparatus for preventing worm-shaped image irregularities There is described an image forming apparatus, which prevents an occurrence of worm-shaped image irregularities even in the high-speed developing operation to form a high quality image. In the image forming apparatus, the contact developing employing a two component... | 03/11/2008 |
| 7340195 | Image forming apparatus having a scattered toner sucking port An image forming apparatus includes: an image carrier with an electrostatic latent image formed thereon; a developing device for developing the electrostatic latent image into a toner image, a developer carrier arranged opposite to the image carrier, for allowing a ... | 03/04/2008 |
| 7340202 | Image forming apparatus and process cartridge for use therewith An image forming apparatus and process cartridge that achieves extended operating life of a two-component developer without generating such problems as toner scattering, etc. either in the initial period or over time. The gap between the image support member and the... | 03/04/2008 |
| 7332361 | Xerographic micro-assembler Xerographic micro-assembler systems and methods are disclosed. The systems and methods involve manipulating charge-encoded micro-objects. The charge encoding identifies each micro-object and specifies its orientation for sorting. The micro-objects are sorted in a so... | 02/19/2008 |
| 7314696 | Electrophotographic toner and development process with improved charge to mass stability Toners and developers are disclosed. The toner of the present invention contains at least one toner resin, at least one charge control agent, at least one surface treatment agent, and optionally at least one release agent and/or colorant. The toners of the present i... | 01/01/2008 |
| 7309556 | Black toner and developer A developer includes black toner particles and carrier particles, the black toner particles including at least one binder, at least one black colorant and one or more external additives, wherein the toner particles comprise from about 7 to about 15 pph of the develo... | 12/18/2007 |
| 7310490 | Developing unit for an image forming apparatus A developing unit for an image forming apparatus using a two-property developer that induces a magnetic attraction force based on the slope of a curved line representing the magnetism of each magnetic pole of a magnetic field generating part of a developing roller a... | 12/18/2007 |
| 7308223 | Method, device and image forming apparatus for developing an image using a two-component developing agent A developing agent carrying member including magnets is disposed facing an image carrying member, a two-component developing agent containing toner and magnetic carrier is carried in a form of a layer on a surface of the developing agent carrying member, speed diffe... | 12/11/2007 |
| 7300736 | Toner, and developer, image forming method, image forming apparatus and process cartridge using the toner A toner contains: (A) a binder resin; (B) a colorant; (C) a charge controlling agent; and (D) an additive. (A) contains: a polyester resin containing no tetrahydrofuran-insoluble component; and having components having a molecular weight not greater than 5×102... | 11/27/2007 |
| 7298995 | Developing device used in an image forming apparatus The developing device 100 includes a stirrer and transferor 122, 124, a magnetic roller 130, and a developing roller 140, that are disposed in a housing 110 which contains the two-component developing agent including the magnetic c... | 11/20/2007 |
