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| Number | Title | Issue Date |
| 8180231 | Testing transfer nips of printing devices using transfer field uniformity maps A method and apparatus can, while operating a printing device in a test mode, supply a changed transfer field to a marking material transfer device. The changed transfer field is less than or more than the standard transfer field. The method and apparatus disable op... | 05/15/2012 |
| 8126339 | Image forming apparatus, intermediate transfer belt drive control method, computer program, and recording medium An image forming apparatus includes a primary transfer unit, a secondary transfer unit, a belt drive unit, and a swingable assembly. The primary transfer unit primary transfers an image from an image carrying member to an intermediate transfer belt. The secondary tr... | 02/28/2012 |
| 8023840 | Image forming apparatus for detecting the distribution of electrical resistance of a transferring member An image forming apparatus includes a rotatable image bearing member and a toner image former for forming a toner image on the image bearing member, wherein the toner image former is capable of forming a toner image having a predetermined width measured in a directi... | 09/20/2011 |
| 8019241 | Image forming apparatus An image forming apparatus is provided. The image forming apparatus includes: a photosensitive member; a discharging unit arranged to face the photosensitive member; a high-voltage power supply unit which supplies power to the discharging unit; a discharge detection... | 09/13/2011 |
| 7986889 | Abnormality detection in an image forming apparatus An image forming apparatus includes: a plurality of photosensitive members; a plurality of discharging units respectively facing the plurality of photosensitive members; a plurality of high-voltage power supply units which are provided for the plurality of charging ... | 07/26/2011 |
| 7962054 | Image forming apparatus having a function of predicting device deterioration based on a plurality of types of operation control information An image forming apparatus is provided. The image forming apparatus includes an acquiring unit that acquires a plurality of types of operation control information of the image forming apparatus that indicate deterioration of a toner in the image forming apparatus or... | 06/14/2011 |
| 7890002 | Image forming apparatus with cooling device and controller permitting image heating during error occurrence There is provided an image forming apparatus that effectively suppresses an increase in temperature of a heating device by operating an air blowing device when image formation is performed to a small-size recording material, and which can continuously perform the im... | 02/15/2011 |
| 7813658 | Image forming apparatus An image forming apparatus is provided. The image forming apparatus includes a photosensitive member which carries an electrostatic latent image; a charger comprising a charging wire extended in a direction parallel to an axial direction of the photosensitive member... | 10/12/2010 |
| 7715737 | Charge roll with axial end portions in contact with cleaning member and image forming apparatus A charge roll disposed in an image forming apparatus, for charging an image carrier for carrying an image, and to be cleaned by a cleaning member, the charge roll including: a shaft and an electrically conductive layer provided around the shaft, an axial end portion... | 05/11/2010 |
| 7620335 | Image forming apparatus An image forming apparatus that includes: plural photosensitive members; plural charging units respectively opposed to the plurality of photosensitive members; a high-voltage power supply unit which applies a voltage to the charging unit; and a discharge detecting u... | 11/17/2009 |
| 7450869 | Transfer component monitoring methods, image forming devices, data signals, and articles of manufacture Transfer component monitoring methods, image forming devices, data signals, and articles of manufacture are described. According to one aspect, a transfer component monitoring method includes counting a plurality of imaging operations performed by an image forming d... | 11/11/2008 |
| 7440808 | Electronic apparatus, replacement unit, and electronic apparatus control method An electronic apparatus holds identification information for identifying the electronic apparatus. A replacement unit is detachably connected to the electronic apparatus. The replacement unit holds an operation program to controls the electronic apparatus and determ... | 10/21/2008 |
| 7400759 | Method for testing a plastic sleeve for an image cylinder or a blanket cylinder This invention relates to a method for testing a plastic sleeve for use with an image cylinder or a blanket cylinder in an electrophotographic process. ... | 07/15/2008 |
| 7340191 | Image forming apparatus featuring variably-controlling a primary-transferring condition based on a detection result of combined toner images An image forming apparatus includes an image bearing member, first toner image forming device of forming a first toner image by a first toner, second toner image forming device of forming a second toner image by a second toner, transferring device of transferring th... | 03/04/2008 |
| 7333741 | Image forming device An image forming device comprises: charging means for uniformly charging the surface of a photosensitive member; charging control means for controlling the charging output of the charging means; and table storing means for storing a plurality of control tables stipu... | 02/19/2008 |
| 7305193 | Image forming apparatus with operation modes An image forming apparatus is provided which can form an image without defective transfer even if a resistance value of a transfer device is so high that defective transfer tends to occur. Before starting operation of printing an image on a sheet, a transfer current... | 12/04/2007 |
| 7254349 | Image forming apparatus having means to control condition of current supply to discharge wire and grid of charging member An image forming apparatus is provided with an image bearing member, a charging member with a discharge wire and a grid, and a first current supply controlling member, which controls a current supply to the discharge wire. Also provided are a second current supply c... | 08/07/2007 |
| 7243045 | Failure diagnosis method, failure diagnosis apparatus, image forming apparatus, program, and storage medium A failure diagnosis method diagnoses failure occurring in an image forming apparatus. The failure causes defect in an image output from the image forming apparatus. The failure diagnosis method includes acquiring operation state signals indicating operation states d... | 07/10/2007 |
| 7227675 | Hologram recording medium, recording/reproducing apparatus and method therefor A hologram recording medium in which data is recorded at a high density, the input of a reference beam to an area to which data is not to be recorded of a recording layer is prevented when recording data to the hologram recording medium, and an amount of noise when ... | 06/05/2007 |
| 7177551 | Apparatus for managing consumables of image forming apparatus The present invention relates to an apparatus for managing consumables of an image forming apparatus widely used in printers, multi-function printers, and so on. The apparatus of the present invention includes memory devices provided in the consumables for writing a... | 02/13/2007 |
| 7175175 | Driving apparatus, sheet processing apparatus having driving apparatus, image forming apparatus having sheet processing apparatus and control system A driving apparatus includes a plurality of driving devices; a plurality of malfunction detectors for detecting a malfunction of the driving devices; a plurality of electric current setting devices for setting electric currents through the driving device; and a cont... | 02/13/2007 |
| 7173395 | Inverter unit grounding method and inverter unit A circuit system that includes a sensor circuit for a sensor that detects the state of a motor is provided in an inverter unit for driving the motor. A 0V of the circuit system is connected with a shield braid of a shielded cable that connects the sensor circuit and... | 02/06/2007 |
| 7162187 | Image forming apparatus and image forming method In an image forming apparatus, a toner image is formed on a photosensitive element and a transfer roller, which carries a transfer medium, is pressed against a photosensitive element at a pressure of from 20.4 N/cm2 to 200 N/cm2. ... | 01/09/2007 |
| 7148976 | Image capture and processing system health check A system which provides a continuous indication of the operating integrity, of an entire image capture and processing system without the need for interfering with document throughput or the need for special paper test documents to be inserted into the scanning path.... | 12/12/2006 |
| 7110917 | Abnormality determining method, and abnormality determining apparatus and image forming apparatus using same An abnormality determining apparatus includes an information storage unit for storing normal index information serving as an index of a normal state of the detection subject, an information obtaining unit for obtaining a plurality of types of information, and an abn... | 09/19/2006 |
| 7110148 | Duplex image reading apparatus A duplex image reading apparatus has a transportation path for transporting a sheet original to a reading region by an original transporting device, and first and second reading devices placed corresponding to respective transportation sides of the sheet original in... | 09/19/2006 |
| 7092646 | Printing device and method for locating a media jam A printing device is provided that includes a housing having a media path therethrough. The printing device includes at least one sensor for detecting when a media jam occurs in the media path. At least one indicator is operatively associated with a processor to pro... | 08/15/2006 |
| 7061637 | Method and apparatus for image forming capable of effectively collating a stack of single-/double-sided recording sheets in a desired ejection tray An image forming apparatus includes first and second image carrying members, ejection trays, and a sheet transferring mechanism. The first image carrying member carries images in increasing order of corresponding sheet numbers. The second image carrying member carri... | 06/13/2006 |
| 7062343 | Remote maintenance system Factories (102–104) have host computers (107) for monitoring industrial equipment (106). Each host computer (107) is connected to a management host computer (108) on a vendor (101) side through the internet (105). T... | 06/13/2006 |
| 6963786 | Remote maintenance system Factories (102-104) have host computers (107) for monitoring industrial equipments (106). Each host computer (107) is connected to a management host computer (108) on a vendor (101) side through the internet (105). Th... | 11/08/2005 |
| 6944408 | Control device and method for monitoring wear parts for printers and copiers A control device and a method for monitoring wear parts for printers and copiers is provided. The control device includes a counter device with which the replacement intervals or, respectively, the maintenance intervals for individual wear parts are monitored. The r... | 09/13/2005 |
| 6931355 | Method and apparatus for providing data logging in a modular device A modular device, that includes an operation event log in respective modules of the device to record time-stamped events, e.g., errors, and a configuration log in a central controller to keep track of changing configurations due to swapping or removal of modules. A ... | 08/16/2005 |
| 6912071 | Virtual tech rep by remote image quality analysis A virtual tech rep system that can assist in reducing service call visits and customer complaints by readily analyzing image quality of an output image device, such as a copier or printer. The system generates a hardcopy test pattern output from the copier or printe... | 06/28/2005 |
| 6904242 | Method, device, system and recording medium for detecting improper cartridge, and cartridge A cartridge is set in a printer main unit, and has a remaining toner measurer which measures toner in a toner chamber upon setting of the cartridge. A cartridge memory stores information of a remaining toner amount measured previously. CPU compares the remaining ton... | 06/07/2005 |
| 6895194 | Xerographic development system where a gap between a donor member and a photoreceptor is estimated In a hybrid jumping (HJD) or hybrid scavengeless (HSD) development station used in xerography, a control system avoids arcing conditions in a gap between a donor member and an image receptor. In a set-up operation, a series of test patches are produced while increme... | 05/17/2005 |
| 6873802 | Methods of verifying requirement for replacement of a main unit and of a component of image formation apparatus and judging advisability of recommendation for replacement The technique of the present invention reads information, such as a use start date of a color laser printer, a cartridge detachment date, a total number of cartridges, used, a total consumption of toners, a total number of prints, and temperatures and humidities at ... | 03/29/2005 |
| 6873803 | Image forming apparatus and method of displaying information about image forming apparatus A method of displaying information about an image forming apparatus comprising a first image forming portion for forming an image on a normal image display medium and a second image forming portion for forming an image on a reversible image display medium and capabl... | 03/29/2005 |
| 6846599 | Image structure and image-forming system An image structure formed on a medium. The image structure is so formed that an angular distribution of surface reflection light beams under the condition that a surface of an image G formed on a medium is irradiated with a slit-transmitted light beam satisfies the ... | 01/25/2005 |
| 6711363 | METHOD OF DETERMINING A CHARGING DEVICE PRE-FAULT STATUS, A PRINTING MACHINE ARRANGED WITH THE SAME METHOD, A METHOD OF FORMING A CHARGING DEVICE SERVICE MESSAGE AND A METHOD OF TRIGGERING A CLEANING CYCLE A printing machine comprises a charging device that forms a variable operating voltage. A charging device pre-fault status condition is determined by sampling the charging device operating voltage, forming a slope value based on a charging device operating voltage r... | 03/23/2004 |
| 6633732 | Reliability model based copy count correction during system recovery for predictive diagnostics The present invention relates to providing supplemental counts or "clicks" to account for recovery conditions in a document processing system. The application of recovery counts combined with the system cycle count when suitably summed will provide superi... | 10/14/2003 |
