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| Number | Title | Issue Date |
| 8190045 | Developing device and image forming apparatus A developing including a developer replenishing tank for replenishing a replenishment developer to a developer tank; a toner concentration detecting sensor; a discharging mechanism for discharging an excessive amount of the developer-tank-contained developer outside... | 05/29/2012 |
| 8027605 | Image forming apparatus and image density control method An image forming apparatus and an image density control method for controlling image density in the image forming apparatus, involving adjusting a toner concentration control reference value in accordance with an amount of the toner replaced in a developing device s... | 09/27/2011 |
| 7881629 | Image forming apparatus and image density control method In an image forming apparatus and an image density control method that are capable of suppressing the amount of toner consumed for a purpose other than image formation and responding to variation in the development ability of a development device due to environmenta... | 02/01/2011 |
| 7515844 | Image density control method and image forming apparatus An image density control method for an image forming apparatus in which, in order to keep the development capability constant over time, the toner density in the developer is manipulated to an appropriate range by changing the toner density control reference value i... | 04/07/2009 |
| 7370949 | Liquid supplying member, method of manufacturing the same, and liquid ejection apparatus incorporating the same In a liquid supplying member, for supplying liquid from a liquid container to a liquid ejection head which are provided in a liquid ejection apparatus, a plurality of elastic members, each of which is elongated in a first direction so as to have a first face and a s... | 05/13/2008 |
| 7362466 | Image forming apparatus and replaceable part and IC chip for the same An image forming apparatus of the present invention includes an apparatus body. An image forming device included in the apparatus is at least partly implemented by a replaceable part. A counter counts prints output by the apparatus with the replaceable part. A memor... | 04/22/2008 |
| 7352977 | Toner level detection method and image forming apparatus employing such toner level detection method Forced supply of toner(s) from toner hopper(s) to developer storage container(s) is executed while interrupting and/or prohibiting image forming operation(s) so as to prevent consumption of toner(s), toner level(s) within toner hopper(s) being determined to be low a... | 04/01/2008 |
| 7279667 | Image forming apparatus An image forming apparatus includes an exposure unit, a developing unit and a transferring unit that transfers a visualized image of developer to an image recording medium. The exposure unit includes a light emitting unit, a detecting unit that detects a quantity of... | 10/09/2007 |
| 7274887 | System and method for setup of toner concentration target for a toner concentration sensor A method by which the target of a toner concentration (TC) sensor can be set up based on the equivalent developability concept without using an expensive patch generator. First, use a black toner area coverage (BTAC) sensor to measure the relative reflectance (RR) o... | 09/25/2007 |
| 7260336 | Image forming apparatus and image forming method for performing density control of toner images In a density control technique wherein a density of a toner image formed as a patch image is detected for performing density control based on the detected result, detection errors are decreased so as to properly set a density control factor. The density control fact... | 08/21/2007 |
| 7206068 | Image forming device, post-processing device and color calibration method An image forming device includes: a toner image forming unit that forms a toner image onto a recording medium; a controlling unit that controls the toner image forming unit such that a test image is formed on the recording medium; a sheet transfer unit that transfer... | 04/17/2007 |
| 7200346 | Image forming apparatus having different dots per unit area densities An image-forming apparatus includes image-forming sections, a density detector, and a controller. Each image-forming section has an exposing unit and a developing unit. The image-forming section prints an image of a density detection pattern having a plurality of pa... | 04/03/2007 |
| 7162167 | Image forming apparatus, method of adjusting developing unit of the apparatus, developing unit, and storage medium In adjustment control of a developing device, the number of printed sheets and the toner consumption amount per sheet are calculated. If the accumulated toner consumption amount is smaller than a predetermined amount when a predetermined number of sheets are printed... | 01/09/2007 |
| 7158732 | Method and system for using toner concentration as an active control actuator for TRC control A method of using toner concentration (TC) as an active actuator in the tonal reproduction curve (TRC) controller, so that not only will the TRC controller maintain the TRC of the output, but also all the electrostatic actuators will not diverge, and the toner conce... | 01/02/2007 |
| 7031020 | Image processing method, apparatus and controller An image forming apparatus and method in which a controller is capable of executing image processing of its own are disclosed. The controller has an RF unit for processing image information, a halftone image processor, a density corrector and a patch generator. The ... | 04/18/2006 |
| 7003233 | Image forming apparatus with a toner replenishing control feature based on stored toner density and fluidity information, related method, and developing agent replenishing container for same There is provided an image forming apparatus including the first developing agent storing section which stores toner, a toner replenishing member for supplying the toner in the first developing agent storing section to the second developing agent storing section, an... | 02/21/2006 |
| 7003236 | Liquid development apparatus, liquid development method, and image forming apparatus and image forming method using liquid development A liquid development apparatus utilizes wet development as a development method and an image forming technique. The apparatus uses squeegee rollers, disposed facing a developer roller, and moved to adjacent positions at which the squeegee rollers contact a liquid de... | 02/21/2006 |
| 6968240 | Method for controlling process parameters to achieve constant process conditions A method for controlling process parameters to achieve constant process conditions, including studying the actual data and reference data independent of time and applying them one on top of the other so that, in the case of optimum match, a 45° straight line is ach... | 11/22/2005 |
| 6954597 | Electrophotographic image-forming apparatus using two-component developer and print density control method thereof An electrophotographic image-forming apparatus and method using a two-component developer comprises a charging roller for charging a surface of a photosensitive medium at a predetermined potential; a developing unit for developing an electrostatic latent image forme... | 10/11/2005 |
| 6947676 | Image forming apparatus and controlling method therefor determining state use of cartridge An image forming apparatus is used together with a process cartridge which is detachably attachable to the image forming apparatus and which includes an electrophotographic, photosensitive body, a developing device provided with at least a developer containing porti... | 09/20/2005 |
| 6941084 | Compensating optical measurements of toner concentration for toner impaction A method for sensing toner concentration in a developer housing with an optical system containing developer material including toner and carrier, the method, including: emitting light with the optical system through a viewing window in the developer housing onto dev... | 09/06/2005 |
| 6931217 | Toner residual amount detection apparatus In order to prevent a toner residual amount from being erroneously judged as “toner present” after the toner residual amount has been judged to be insufficient, the toner residual amount detection apparatus of the present invention has a developing device for de... | 08/16/2005 |
| 6910147 | Digital recording apparatus real-time clock An embodiment of a digital recording apparatus real-time clock is disclosed. In particular, a real-time clock to mark when each recording is taken is described. The embodiment comprises a digital recording apparatus that contains a real-time clock powered by the mai... | 06/21/2005 |
| 6907383 | Flow diagnostic system A flow diagnostic system for a flow sensing element and impulse lines. A pressure transmitter coupled to the impulse lines provides digital pressure data to a control system. The control system provides the pressure data and real time clock readings to a diagnostic ... | 06/14/2005 |
| 6687467 | Apparatus and method of controlling supply of developing agent to developer An apparatus for controlling the supply of a developing agent, installed in a developer, is equipped with a developing-agent amount detector to detect an amount of the developing agent consumed by the developer; a driving-time detector to detect a driving... | 02/03/2004 |
| 6668142 | Image forming apparatus with reference density changed according to low frequent and high frequent modes An image forming apparatus is able to maintain an image density at a constant level. The apparatus has a FC mode selecting key for allowing a user to selectively designate a low FC mode indicating that the apparatus is in a less-used state where the numbe... | 12/23/2003 |
| 6654566 | Developer agitating system, electrophotographic image forming apparatus and cartridge A developer agitating system for agitating a developer includes a cartridge detachably mountable to a main body of an electrophotographic image forming apparatus and including a developing member for developing an electrostatic latent image formed on an e... | 11/25/2003 |
| 6501916 | Image forming apparatus An image forming apparatus has a plurality of image forming devices for forming images in different colors. Each image forming device has an image bearing member, a charging device for charging the image bearing member, a developing device for developing ... | 12/31/2002 |
| 6501918 | Toner concentration controlling apparatus A concentration controlling apparatus is provided for controlling the toner concentration of a developer contained in a developer unit. The developer contains a plurality of components including toner to be transferred to a photosensitive body for forming... | 12/31/2002 |
| 6345162 | Image forming apparatus The present invention relates to an image forming apparatus which has an image bearing member for bearing a latent image, charging device for charging the image bearing member by bringing ears of electrically conductive particles into contact with the ima... | 02/05/2002 |
| 6321045 | Xerographic development system, a method for predicting changes in the ratio of toner to carrier In a control system for xerographic development, an important value to be monitored in real time is the ratio of toner to carrier (T/C) in the developer supply. However, direct measurements of T/C, whether by magnetometer readings of the developer, or den... | 11/20/2001 |
| 6233411 | Method and apparatus for stabilizing productivity of an electrostatographic toner image reproduction machine A distributive pitch skipping method and apparatus for stabilizing productivity in an electrostatographic printing machine. The method and apparatus provide for establishing a first toner concentration (TC) limit at and below which toner image reproductio... | 05/15/2001 |
| 6141509 | Toner content control device for an electrophotographic apparatus A toner content control device for an electrophotographic apparatus of the type using a toner and carrier mixture. The control device determines an amount of toner replenishment on the basis of a difference between the toner content of the developer and a... | 10/31/2000 |
| 6118953 | Electrostatographic apparatus and method with programmable toner concentration decline with the developer life In an electrostatographic process and apparatus a replenishment device adds toner particles to a development station that includes a developer comprising a mixture of toner particles and carrier particles. A reference parameter that is used in control of ... | 09/12/2000 |
| 6055388 | Image forming apparatus and method for obtaining appropriate toner density An image forming apparatus includes an image bearing member, a latent image forming device that forms a latent image on the image bearing member, a developing device that develops latent image on said image bearing member to a toner image with a two-compo... | 04/25/2000 |
| 6006050 | Image forming method and apparatus for controlling amount of supplied toner or agitating time An image forming apparatus including an image bearing member, a latent image forming device which forms a latent image on the image bearing member, a developing device which develops the latent image using a two-component developer including a toner and a... | 12/21/1999 |
| 5991558 | Image forming apparatus that control the reflected light detected by an optical scanner in response to a gradation area percentage of a toner patch An image forming apparatus that prepares a toner patch including a predetermined gradation area percentage on an image support to detect a developing concentration. An optical sensor detects reflected light from the background of the image support and ref... | 11/23/1999 |
| 5987272 | Image forming apparatus including image quality compensation means A test patch image is formed and the density thereof is detected to maintain the image quality at a constant level. One of the image forming conditions, for example, the developing bias voltage of the developing unit inside the image forming apparatus tha... | 11/16/1999 |
| 5973795 | Toner mark for toner concentration control A toner mark which is to be sensed by a toner concentration sensor in an electrophotographic printing apparatus includes a rectangular dot pattern where a plurality of toner dot patterns are spaced in a staggered configuration. Each of the toner dot patte... | 10/26/1999 |
| 5946524 | Image forming apparatus and image density regulating method A test pattern image is formed on a photosensitive drum, and the density of the test pattern image is detected by a sensor. The grid voltage Vg of an electrifying charger and the toner concentration T/C in a developer are adjusted according to the detecti... | 08/31/1999 |
