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| Number | Title | Issue Date |
| 8116640 | Apparatus and method for sensing photoreceptor failure in a xerographic printing apparatus An apparatus (100) and method (200) that senses photoreceptor failure in a xerographic printing apparatus is disclosed. The xerographic printing apparatus can include a rotatable photoreceptor (110) having a photoreceptor surface (111), a... | 02/14/2012 |
| 8019239 | Device and method for detecting life of organic photoreceptor and image forming apparatus A device for determining an end of life of an organic photoreceptor includes a potential detecting unit that detects a residual potential of the organic photoreceptor, a temperature detecting unit that detects temperature of the organic photoreceptor in either one o... | 09/13/2011 |
| 8019238 | Image forming apparatus In an image forming apparatus, an image forming portion forms an image on a rotator. A storage portion stores change characteristics information relevant to correction parameters corresponding to phase points of the rotator. A designating portion designates a correc... | 09/13/2011 |
| 7983575 | Apparatus and method for determining photoreceptor charge transport layer thickness of apparatus using a scorotron charge device A photoreceptor charge transport layer thickness determining apparatus for a photoreceptor including a scorotron charge device having coronode wires and a scorotron grid positioned between the corona wires and the photoreceptor charge transport layer, the scorotron ... | 07/19/2011 |
| 7978987 | Image forming apparatus In an image forming apparatus, an image forming portion forms an image on a rotator. A storage portion stores change characteristics information relevant to correction parameters corresponding to phase points of the rotator. A designating portion sequentially design... | 07/12/2011 |
| 7907854 | Image forming apparatus and image forming method An image forming apparatus includes a photoconductor, a charging member, a voltage applying unit that applies at least one of voltage of a DC component and voltage of an AC component to the charging member, a capacitance unit connected to a superposition point for t... | 03/15/2011 |
| 7869721 | Apparatus and method for detecting carrier particles in an electrophotographic device A method (400) and apparatus (100) that detects carrier particles (130) in an electrophotographic device is disclosed. The apparatus may include an image carrying member (110). The image carrying member may have a first side (111) ... | 01/11/2011 |
| 7831157 | Total layer thickness detection apparatus, charging device, image forming apparatus, total layer thickness detection method and computer readable medium storing program for total layer thickness detection A total layer thickness detection apparatus for a charged body includes: a saturated charge amount detection unit that detects a saturated charge amount of a charged body having plural coating layers with mutually different relative dielectric constants; a storage u... | 11/09/2010 |
| 7826754 | Image forming apparatus with thickness detecting unit and parameter setting unit An image forming apparatus includes a photosensitive member, a charging device, a developing device, a thickness detecting unit and a parameter setting unit. A photosensitive layer is formed on a surface of the photosensitive member. The charging device charges the ... | 11/02/2010 |
| 7693433 | Image forming apparatus and layer thickness calculating method An image forming apparatus includes: an image carrier that rotates and carries a toner image by a surface layer disposed on a surface thereof; a charging roll that charges the surface layer while the image carrier completes one or more rotations; a power supply unit... | 04/06/2010 |
| 7657193 | Consumable management device, image forming apparatus, computer readable medium storing a program, and consumable management method A consumable management device includes a life determining unit that determines whether a consumable reaching a life end exists in an object apparatus which operates with a plurality of consumables or not, a stop process unit that, when the life determining unit det... | 02/02/2010 |
| 7639956 | Image forming apparatus, cartridge, and storing device mounted to the cartridge An image forming apparatus has a first image formation mode for forming an image on an image bearing member by using developer under a first predetermined image forming condition and a second image formation mode for forming an image on an image bearing member by us... | 12/29/2009 |
| 7567763 | Image forming apparatus and image forming method capable of detecting a resistance value of an intermediate transferring member An image forming apparatus capable of detecting a resistance value of an intermediate transferring member at a stabilized sensitivity irrespective of the influences of environmental conditions, disturbing elements, etc. and contributing to the promotion of the image... | 07/28/2009 |
| 7471906 | Image forming apparatus and image forming method An image forming apparatus includes a photoconductor, an electrifying member, a high voltage applying unit for applying to the electrifying member a high voltage in which a DC component of a constant voltage on an AC component of a constant current are superposed, a... | 12/30/2008 |
| 7433611 | Image forming apparatus that judges lifetime of photosensitive unit The residual potential and charging potential of the surface of a photosensitive drum 20, or the charging potential and exposure potential of the surface of the photosensitive drum 20 are detected by an exposure sensor 28. The lifetime of the ph... | 10/07/2008 |
| 7430378 | Image forming apparatus setting an image forming condition based on characteristics of a cartridge, cartridge used in the image forming apparatus, and storage medium mounted on the cartridge An image forming apparatus allows mounting thereon and dismounting therefrom a plurality of types of cartridges, each of the cartridges including a plurality of process members used for image formation and a storage medium for storing information. The image forming ... | 09/30/2008 |
| 7426351 | Image forming apparatus and layer thickness calculating method An image forming apparatus, includes: an image carrier that carries a developer image by a charge layer provided on a surface of the image carrier; a charger that charges the image carrier; a feeder that feeds the charger with a charge; a total charge amount detecto... | 09/16/2008 |
| 7403723 | Image forming apparatus with measuring technique An image forming apparatus including a photoreceptor that rotates, a charging member provided in contact with or in close proximity of the photoreceptor to charge the photoreceptor, a charge amount detecting portion that accumulates current flowing across the photor... | 07/22/2008 |
| 7403727 | Image forming apparatus and density adjusting method thereof The present invention performs density adjustment (ATR process) and transfer voltage control (ATVC) in parallel; the ATR process transfers and forms a patch image on an intermediate transfer member and detects and adjusts the density of the patch image, and the ATVC... | 07/22/2008 |
| 7359650 | Image forming apparatus and method for judging the lifetime of a photosensitive unit The residual potential and charging potential of the surface of a photosensitive drum 20, or the charging potential and exposure potential of the surface of the photosensitive drum 20 are detected by an exposure sensor 28. The lifetime of the ph... | 04/15/2008 |
| 7327965 | Charging units capable of use in and image forming apparatus having different processing speeds Charging unit(s) is/are made versatile enough to be used in a plurality of image forming apparatus models having different processing speeds. Furthermore, in the context of an electrophotographic image forming apparatus permits selective switching between/among proc... | 02/05/2008 |
| 7319826 | Method of optimizing amount of toner of electrophotographic printer A method of optimizing the amount of toner of an electrophotographic printer is provided. The method includes measuring a life span of the development roller in use. The speed of a development roller, which corresponds to the measured life span of the development ro... | 01/15/2008 |
| 7319829 | Transfer bias adjustment based on component life An electrophotographic image forming device may use a feedback loop to determine environmental conditions and accordingly set one or more operating parameters. The device may detect a resistance/capacitance characteristic of a feedback loop comprising an interface b... | 01/15/2008 |
| 7300047 | Multi-layer sheet feeder A sheet feed mechanism having a multi-layer structure. The multi-layer structure has a wear layer adapted to contact a sheet during sheet feeding and a replacement indicator layer adjacent the wear layer. The replacement indicator layer is adapted to indicate a wear... | 11/27/2007 |
| 7292794 | System, apparatus, and method for preventing access to information stored in a consumable item of an image forming apparatus An image forming apparatus having a recognizing member configured to read a property stored in a memory member of a consumable item via a communication member, and to recognize if the consumable item can be used. The image forming apparatus also includes a property ... | 11/06/2007 |
| 7274885 | Image forming device having replaceable drum unit and developing unit In an image forming device, when a replacement timing of a photoconductive drum unit has been reached, the image forming device determines whether or not a replacement timing of a developing unit is close, but not yet actually reached. When the replacement timing of... | 09/25/2007 |
| 7274884 | Image forming apparatus to which a cartridge having a memory medium configured to store information-forming-condition information is attachable, such a cartridge, such a memory medium, and an image forming system comprising such a memory medium An image forming apparatus to which a cartridge is mountable and which is operable to form images at different image formation speeds, wherein the cartridge includes a memory medium having a memory area for storing information relating to image forming conditions of... | 09/25/2007 |
| 7272330 | System for analyzing an organic photoconducting drum and a method thereof A system for analyzing an organic photo conducting drum includes an identification system, a feature examination system, and an evaluation processing system. The identification system identifies one or more characteristic relating to the organic photo conducting dru... | 09/18/2007 |
| 7263299 | Image forming apparatus that judges lifetime of photosensitive unit The residual potential and charging potential of the surface of a photosensitive drum 20, or the charging potential and exposure potential of the surface of the photosensitive drum 20 are detected by an exposure sensor 28. The lifetime of the ph... | 08/28/2007 |
| 7258411 | Method of informing a user of end of life of a consumable for an ink jet printer A method informs a user of an ink jet printer of the end of life of a consumable. The consumable supplies ink to a printhead having a plurality of ink ejection nozzles and an associated plurality of ink jetting actuators, each of the plurality of ink jetting actuato... | 08/21/2007 |
| 7254350 | Image forming apparatus featuring a variable oscillating electric field formed between a developer carrying member and an image bearing member during a developer operation in accordance with a peripheral speed of the image bearing member An image forming apparatus includes an image bearing member; a developer carrying member, disposed opposed to the image bearing member, for carrying a developer, wherein an electric field is formed between the developer carrying member and the image bearing member d... | 08/07/2007 |
| 7251419 | Effective surface resistivity through image analysis A method for determining the approximate surface conductivity of a photoreceptor surface. The method involves forming a latent image of a series of lines of different widths on the surface, developing the image, and then printing the image. Based on which lines prin... | 07/31/2007 |
| 7239413 | Printer replaceable component A replaceable component is installable in and removable from a printing device and contains one or more supplies used in printing by the printing device. A memory and a port are in the replaceable component. Data that characterizes usage of the one or more supplies ... | 07/03/2007 |
| 7233749 | Image forming device for performing calibration by patch pattern An image forming device, has an image carrier on which a latent image is formed, and a development device to which a plurality of development units for containing developer with the same color are detachably installed, and development is performed by attaching the d... | 06/19/2007 |
| 7228078 | Printing control device and method and program for efficient utilization of consumable products mounted thereon A printing control device, method, system and program with a consumable product detachably mounted thereon, including a state storing unit that stores a usage state of the consumable product, a detachment detecting unit that detects that the consumable product has b... | 06/05/2007 |
| 7215904 | Image forming apparatus group In an image forming apparatus group including a plurality of kinds of image forming apparatuses having different process speeds, and a cartridge which can be commonly used in a plurality of kinds of image forming apparatuses, when there is provided a cartridge which... | 05/08/2007 |
| 7203435 | Image forming apparatus and printer having a double-sided printing mode An image forming apparatus operating in a double-sided print mode, includes a charger for charging an image carrier, a charge voltage loader for applying a charge voltage to the charger, an image forming device for forming an image on a recording material, and a con... | 04/10/2007 |
| 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 |
| 7164491 | Identifying apparatus, apparatus to be identified, identifying method, and printing apparatus An encoder of a process unit encodes an identification code output by the CPU of a main unit, thereby obtaining a response code. The response code is returned to the main unit. The logic of the encoder is changeable. At shipment, a first logic is set in the encoder.... | 01/16/2007 |
| 7164881 | Apparatus and method for establishing a default media size for an imaging device An imaging device, such as a printer, scanner, copier, multifunctional printer, and the like includes a sensor to detect the size of media fed into the imaging device. The detected media size can be set as the default media size for further operations, if desired. | 01/16/2007 |
