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| Number | Title | Issue Date |
| 8190044 | Image forming apparatus An image forming apparatus includes an image bearing member for bearing an electrostatic latent image; a developing device including a developer carrying member for carrying a developer and developing an electrostatic latent image formed on the image bearing member,... | 05/29/2012 |
| 8135295 | Image forming apparatus with a developing device utilizing an alternating bias voltage There is provided an image forming apparatus capable of realizing Improvement of an image density by improving dot reproducibility and reducing fog as well. An alternating voltage is applied to a development sleeve so that a first period during which a first peak-to... | 03/13/2012 |
| 8131172 | Image forming apparatus An image forming apparatus is provided. The image forming apparatus includes an accommodating member configured to accommodate developer; a supply member configured to supply the developer of the accommodating member; a developer holding member configured to supply ... | 03/06/2012 |
| 8126345 | Image forming device An image-forming device can include an image acquiring unit that acquires image data, an image forming unit that forms an image based on the image data, a determining unit that determines whether the image data includes a part having density greater than or equal to... | 02/28/2012 |
| 8121503 | Image forming apparatus, developing device, and method of adjusting developer An image forming apparatus includes an image supporting member; a developer supporting member for attaching developer to the image supporting member to form a developer image; a regulation member for forming a thin layer of the developer on the developer supporting ... | 02/21/2012 |
| 8116647 | Image forming apparatus and method for controlling same An image forming apparatus includes: a photoconductive drum; a developing roller carrying toner; a DC voltage application portion outputting a DC voltage to be applied to the developing roller, and receiving a feedback voltage; an AC voltage application portion appl... | 02/14/2012 |
| 8107840 | Image forming apparatus A supplying roller supplies toner to a developing roller which develops an electrostatic latent image formed on a photoconductive drum. The controller controls a power supply to output a first voltage to the developing roller and a second voltage to the supplying ro... | 01/31/2012 |
| 8095026 | Developing device and image forming apparatus A developing device and image forming apparatus are provided, wherein high quality images, in which generation of development hysteresis (ghost image) is alleviated, are obtained over a long period using a hybrid development method including a toner-supplying develo... | 01/10/2012 |
| 8073350 | Developing apparatus, image forming apparatus, and process cartridge A disclosed developing apparatus employs a flare roller that is a toner carrier in which electrodes of two different phases are provided at fine intervals. Density irregularities or scumming in a developed image due to a potential difference between the flare roller... | 12/06/2011 |
| 8032043 | Image forming apparatus and image forming method In case new and old toners may be mixed, a developing bias is set as follows. The time is first clocked. The number of times toner is replenished from a hopper into a buffer for a clocked period is counted. If a replenishment amount per clock time is a threshold val... | 10/04/2011 |
| 8032042 | Developing bias control device capable of properly controlling developing bias voltage Upon receiving a request to control developing bias voltage, first and second square-wave signal output units output first and second square-wave signals, respectively. When a rising edge of the first square-wave signal coincides with a rising edge of the second squ... | 10/04/2011 |
| 8027604 | Image forming apparatus having a voltage change determiner An image forming apparatus includes data conversion, charging, exposure, developer supply, image density calculation, determination and voltage change mechanisms. The data conversion mechanism converts image data into printing data. The charging mechanism charges an... | 09/27/2011 |
| 8023846 | Segmented roller for flood coating system An electrostatographic apparatus and method of forming a toner image on a receiver using a segmented roller in order to improve transfer of a pigmented toner image to a receiver. The pigmented toner image is applied using the segmented roller and is then transferred... | 09/20/2011 |
| 8023847 | Image forming apparatus and image forming method An image forming apparatus includes an image carrier that is electrically charged and exposed to light to form a latent image that is developed by liquid developer. A first squeezing roller that is held in contact with the image carrier carrying a developed image be... | 09/20/2011 |
| 8014690 | Developing unit and image forming apparatus A developing unit has a voltage-applicator (80) to apply a developing bias voltage to a developing roller (72). The voltage-applicator (80) applies the developing bias voltage for a first duration to apply an AC voltage having a rectangular wave... | 09/06/2011 |
| 8005381 | Image forming apparatus An image forming apparatus includes a latent image bearing body that bears a latent image, a charging member applied with a charging voltage and configured to charge a surface of the latent image bearing body, a developer bearing body applied with a developing volta... | 08/23/2011 |
| 7995943 | Electrophotographic image forming apparatus for use with powder developer material An image forming apparatus has a pair of spacedly opposed first and second bearing members, in which a powder developer material is moved from the first bearing member to the second bearing member. The apparatus also has an electric field generator. The generator fo... | 08/09/2011 |
| 7991313 | Image forming apparatus An image forming apparatus includes an alternating-current high-voltage power supply generating an alternating-current bias for detection of the remaining amount of toner. The alternating-current high-voltage power supply includes a piezoelectric transformer, a piez... | 08/02/2011 |
| 7986892 | Image forming apparatus having a controller for controlling a developer Provided are a developing device and an image forming apparatus, the developing device which employs a two-component developer wherein development hysteresis (ghost) is reduced and deterioration of a carrier is stably suppressed, and high-quality images are thus rea... | 07/26/2011 |
| 7974545 | Developing device and image forming apparatus that utilize a variable AC bias voltage A developing device capable of improving the image density and the dot reproducibility, and an image forming apparatus including the same are provided. A developing device applies an alternating voltage superimposed on a direct current voltage to a developing roller... | 07/05/2011 |
| 7970305 | Development apparatus, image forming apparatus and image forming method for consuming degraded toner The development apparatus that develops an electrostatic latent image formed on an image carrier comprises: a developer roller operable to carry toner on a circumferential surface thereof and develop the electrostatic latent image using the toner; a supply roller op... | 06/28/2011 |
| 7965954 | Image forming apparatus A control unit controls a device that executes an image forming process, compares changes of each toner adhesion amount in an image-density-detection pattern image when a developing-bias control condition is changed, with respect to a toner adhesion amount in an ima... | 06/21/2011 |
| 7949271 | Image forming apparatus using a controller configured to control a developing bias to be applied to developer bearing member based on a input waveform bias and an output waveform bias A development device configured to develop an electrostatic image formed on an image bearing member by applying a developing bias in a development operation includes a developer bearing member configured to bear a developer, a bias applying unit configured to apply ... | 05/24/2011 |
| 7949270 | Development method and image forming apparatus In an embodiment in which an electrostatic latent image formed on the surface of a photoreceptor is developed with a toner by applying an oscillating bias voltage in which a development-side electrical potential and an opposite development-side electrical potential ... | 05/24/2011 |
| 7941064 | Image forming apparatus and image forming method and developing bias voltage adjustment therein Provided is an image forming apparatus including a charging device for charging a photoreceptor drum, a developing device for developing an electrostatic latent image formed on the photoreceptor drum, a developing bias applying device for applying a developing bias ... | 05/10/2011 |
| 7937009 | Image forming apparatus and method of controlling the same according to bias voltages An image forming apparatus includes a photoconductive medium electrified by an electrifying apparatus to a predetermined electric potential, a plurality of color developing apparatuses which are fixed around the photoconductive medium, each color developing apparatu... | 05/03/2011 |
| 7920801 | Image forming apparatus and method for controlling image forming apparatus Related is an image forming apparatus by electrophotography having a function of performing adjustment of image quality when performing image formation. The image forming apparatus includes a detection portion for detecting a fixing temperature of a fixing apparatus... | 04/05/2011 |
| 7912389 | Image forming apparatus An image forming apparatus, wherein the following formulae are satisfied: 0.22 ≤ ( M / | 03/22/2011 |
| 7907856 | Development apparatus and image forming apparatus using toner carrier with a plurality of electrodes An apparatus for developing a latent image on a latent image carrier includes a toner carrier and multiple electrodes arranged at intervals on a surface of the toner carrier. A potential difference is formed between even-numbered electrodes and odd-numbered electrod... | 03/15/2011 |
| 7903989 | Developing apparatus with deformation detection and voltage correction A developing apparatus includes a developer carrying member rotatably provided for carrying a developer; a regulating member that has conductivity, and is provided to be capable of being in contact with the developer carrying member for regulating a amount of the de... | 03/08/2011 |
| 7885563 | Development apparatus and image forming apparatus A development apparatus is provided that can quickly form high quality printing material by steadily supplying developer charged and thinned to a uniform thickness and can also prevent the decrease in the quality of the printing material in a case where the develope... | 02/08/2011 |
| 7885564 | Image forming device An image-forming device includes an image acquiring unit, an image forming unit, a determining unit, and a controller. The image acquiring unit acquires image data for one page. The image forming unit forms an image based on the image data. The image forming unit in... | 02/08/2011 |
| 7877030 | Image forming apparatus An image forming apparatus includes a developer carrying member to which a developing bias is applied. A frequency f of a developing bias waveform, a developing area S1 which is a time-integrated value of a difference between a voltage value of the developing... | 01/25/2011 |
| 7869727 | Image forming apparatus with control section to control development bias potential High quality images are provided by controlling development conditions based on the proportion of the toner layer potential difference, which a difference between the toner layer potential and electrostatic latent image potential, to the development contrast potenti... | 01/11/2011 |
| 7869726 | Image forming apparatus An image forming apparatus performs prints image data. A dividing section divides the image data of a print job into a plurality of sub data areas m(i) (i=1 to n). A duty computing section computes a print duty for each of the plurality of sub data areas (m(1)-m(n))... | 01/11/2011 |
| 7865099 | Image forming apparatus There is described an image forming apparatus, which makes it possible to suppress quality degradation of an image on the basis of a developing electric current profile without optically detecting density of a patch image. The image forming apparatus includes: a dev... | 01/04/2011 |
| 7853161 | Image forming apparatus with toner discharge method A potential difference between the photoreceptor and the development roller is set at a value at which the normally charged toner on the development roller can be flown toward the photoreceptor in the development phase at the time of compulsorily consuming the toner... | 12/14/2010 |
| 7848670 | Developing device and image forming apparatus A developing device includes an image carrier, a developer carrier, a biasing unit disposed upstream of a developing area, and a controller configured to control the biasing unit, and a cleaning member disposed downstream of the developing area to remove the liquid ... | 12/07/2010 |
| 7826758 | Image forming apparatus An image forming apparatus includes a photosensitive drum to which an electrostatic image is formed and a developing sleeve carrying a developer including toner carrier. An alternating voltage is applied to the sleeve to form an alternating electric field between th... | 11/02/2010 |
| 7734205 | Image forming apparatus An image forming apparatus is provided, which controls an appropriate developer amount for a desired image so that an image defect such as an unclear font or a white area is prevented, resulting in a stable image formation for a long term. A developer regulating mem... | 06/08/2010 |
