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| Number | Title | Issue Date |
| 7684735 | Charging apparatus and image forming apparatus A charging apparatus having a corona electrode is provided which exhibits high durability against ozone and moisture in the air, which can charge a surface of a photoreceptor drum stably throughout the life of an image forming apparatus, and which can be manufacture... | 03/23/2010 |
| 7567771 | Charging apparatus and image forming apparatus There is provided a charging apparatus having high durability, in which no rusts etc. are generated, and by which a potential of a photoreceptor drum being charged can be controlled stably within an appropriate range for a long period of time owing to hardly impaire... | 07/28/2009 |
| 7430388 | Pin array scorotron charging system for small diameter printer photoreceptors Non-contact corona charging of a small radius moving surface to a desired surface voltage with a single corona charging system with a first corona generator applying a first charge through a screen grid having a first bias voltage to initially charge the surface to ... | 09/30/2008 |
| 7421222 | Electrophotographic device with contaminant-resistant photoconductor and charger In a charging device having saw-tooth electrodes for generating corona discharges, an amount of dust, toner, or paper dust attached to the tip end portions of saw-tooth electrodes is reduced. First to third pairs of saw-tooth electrode plates are disposed in a side-... | 09/02/2008 |
| 7418224 | Corotron pin guard An improved coronode assembly includes pin guards that are positioned closely spaced from and extending above a coronode in order to provide protection for a user reaching past the coronode to remove a sheet jam, and prevent coronode damage when the coronode is hand... | 08/26/2008 |
| 7412186 | Cleaning system for a charging device in a xerographic printer In a xerographic printing apparatus, a charge device is used to apply a charge to a photoreceptor. The shuttle includes a wiper that cleans a sidewall of the charge device. A tab is disposed adjacent the sidewall to retain toner or dirt accumulated by the scraper. T... | 08/12/2008 |
| 7356286 | Charger, image forming apparatus and process cartridge A charger is opposed to a charging subject member and charges the charging subject member by generating corona discharge. The charger includes: a discharge electrode; and a pair of facing electrodes that are disposed to face with each other being the discharge elect... | 04/08/2008 |
| 7302211 | Charging apparatus and image forming apparatus with plated electrode A charging apparatus having high durability, with no occurrence of rusts or the like, scarcely impaired for the controllability of the charged potential even when contaminants such as a toner are deposited more or less, capable of stably controlling the charged pote... | 11/27/2007 |
| 7277651 | Image forming apparatus and control method with power controlled in accordance with remaining amount of rechargeable battery power There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. This image forming appara... | 10/02/2007 |
| 7260337 | Image forming apparatus with control of commercial and battery power supplies to fusing device There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. The image forming apparat... | 08/21/2007 |
| 7257341 | Image forming apparatus with power supply control for fusing control circuit There is provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively. This image forming apparatus includes a rechargeable battery devi... | 08/14/2007 |
| 7254353 | Image forming apparatus and method of controlling commercial power supply to fusing means There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. This image forming appara... | 08/07/2007 |
| 7251439 | Shield for charging device in xerographic printing device having reduced rate of contamination A xerographic printing device, including a charging device having a shield. In some embodiments of the shield of the charging device in the xerographic printing device, a plurality of holes are provided in an evenly spaced linear fashion extending nearly a full leng... | 07/31/2007 |
| 7236723 | Shield for charging device in xerographic printing device having enhanced voltage and current uniformity A xerographic printing device, including a charging device having a shield. In some embodiments of the shield of the charging device in the xerographic printing device, three slots are provided with one slot in the upstream process direction and the other two slots ... | 06/26/2007 |
| 7187888 | Corona generating device having a wire composite A charging device including a coronode having a wire composite including a core having a dielectric material and a coating layer of conduct material thereon. ... | 03/06/2007 |
| 7187534 | Uniform charge device with reduced edge effects By varying corona producing element height/projection, a more uniform charge potential is achieved. Elements, such as pins or teeth, are shorter at the edges of an element array and grow longer as one moves toward the center of the array. Such variation in height/pr... | 03/06/2007 |
| 7149458 | Xerographic charging device having three pin arrays In a xerographic printing apparatus, a scorotron places a uniform charge on a photoreceptor for forming electrostatic latent images. Three conductive pin arrays are disposed in a housing defined by sidewalls and a screen adjacent the photoreceptor. There can be prov... | 12/12/2006 |
| 7123871 | Neutralizing apparatus and image forming apparatus having the neutralizing apparatus An image forming apparatus having a sharp neutralizing member which can perform uniform neutralizing effects for a long period of time. The sharp neutralizing member includes sharp projections in which tip portions having the following relationship between a distanc... | 10/17/2006 |
| 7123860 | Small footprint charge device for tandem color marking engines In a xerographic printing apparatus, a small footprint charging device may provide uniformity of charge and/or long life in a small diameter photoconductive drum. A grid to be parallel to the drum surface and including small wing shields may reduce or even prevent l... | 10/17/2006 |
| 7110701 | Xerographic charging device having two pin arrays In a xerographic printing apparatus, a scorotron places a uniform charge on a photoreceptor for forming electrostatic latent images. Two conductive pin arrays are disposed in a housing defined by sidewalls and a grid adjacent the photoreceptor. For each array, the d... | 09/19/2006 |
| 7079786 | Image forming apparatus In an image forming apparatus according to the present invention, the force of a tension spring returning to its original position is utilized to vibrate or impact a conductive member using a predetermined timing, one end of the conductive member being fixed and the... | 07/18/2006 |
| 7031628 | Systems and methods for setting up grid voltages in a tandem pin charging device Systems and methods for setting up grid voltage for a tandem pin charging device for charging a photoreceptor in a xerographic printing machine. A charge-generating emitter ratio of a first charging unit is determined and a first grid voltage is set based on the cha... | 04/18/2006 |
| 6963708 | Charging system utilizing grid elements with differentiated patterns A charging system for uniform charging of charge retentive surfaces such as photoreceptors in imaging systems. The charging system includes corona producing elements and grid elements such as scorotron screens wherein the grid elements are arranged generally paralle... | 11/08/2005 |
| 6952548 | Charging apparatus with auxiliary member and image forming apparatus having the charging apparatus A charging apparatus has a discharging member with a plurality of protrusions and an auxiliary member for assisting discharges by the discharging member, and an insulating member formed among the plurality of protrusions of the discharging member, so that discharge ... | 10/04/2005 |
| 6909867 | Uniform charge device with reduced edge effects By varying corona producing element height/projection, a more uniform charge potential is achieved. Elements, such as pins or teeth, are shorter at the edges of an element array and grow longer as one moves toward the center of the array. Such variation in height/pr... | 06/21/2005 |
| 6823157 | Charging device having curved grid A corona generating device, includes a conductor; a grid having a curved surface; and a frame for supporting the grid. ... | 11/23/2004 |
| 6735407 | Corona chargers having consumer replaceable components A charging device assembly used within a reprographic machine having a hollow shell containing the charging device, an attachment mechanism that retains the charging device relative to the hollow shell in a predetermined position, a pair of end covers at either end ... | 05/11/2004 |
| 6640065 | Electrostatic charging device An electrostatic charging device is provided according to which an edged electrode plate can be inserted into and removed from the charging device easily merely by sliding the edged electrode member and cleaning of the electrode edges formed on the edged ... | 10/28/2003 |
| 6553198 | Single piece control grid electrode for a corona charger A single piece control grid electrode for a corona charging device for charging a curvilinear shaped dielectric support member with improved charging uniformity and consistency and with lower assembly and service cost. The single piece control grid is for... | 04/22/2003 |
| 6459870 | Corona cartridge for charging photoreceptors in high-speed electrophotographic applications A corona cartridge for charging a photoreceptor in high-speed electrophotographic applications may include a comb-like corona charging device electronically connected to operate with the photoreceptor, and one or more excess comb-like corona charging devi... | 10/01/2002 |
| 6185397 | Pin charge corotron for minimum ozone production A charging apparatus for applying a uniform electrostatic charge to a charge retentive surface is provided. There is also provided a housing; an array of pin electrodes supported by said housing and positioned adjacent said surface in a non-contact relati... | 02/06/2001 |
| 6070033 | Charging device for an electrophotographic imaging forming system utilizing thin film conducting members The specification discloses an electrophotographic image forming system. The system includes a photoconductor connected to a first electric potential constituting substantially an elongated cylindrical drum provided for rotating around an axis along an el... | 05/30/2000 |
| 5909608 | Tension support mounting for a corona generating device A tension support mounting for applying tension to the corona generating electrode of a corona generating device. A corona generating electrode is placed in cooperative engagement with a fixedly mounted end block via a torsion spring member mounted on the... | 06/01/1999 |
| 5845179 | Pin charge coroton with optimum dimensions for minimum ozone production A charging apparatus for applying a uniform electrostatic charge to a charge retentive surface is provided. The apparatus includes a housing and an array of pin electrodes supported by the housing and positioned adjacent the surface in a non-contact relat... | 12/01/1998 |
| 5742874 | Charging device An charging apparatus includes a housing having a charging side adapted to face a photoreceptor; and a sharp-edged electrode charging member provided in the housing so that the photoreceptor is charged through the charging side by corona discharge from th... | 04/21/1998 |
| 5666604 | Image forming apparatus with charging device having projecting zip discharge electrode and improved parameters An image forming apparatus having an electrostatic latent image carrier, and a charging device which includes an electric discharge electrode having a plurality of projection and a grid electrode located between the electric discharge electrode and the su... | 09/09/1997 |
| 5666605 | Charging unit A corona-discharging type charging device for charging a photoreceptor includes saw tooth-shaped electrodes facing the photoreceptor; side plates applied with a DC bias voltage Vs and provided on both sides of the saw tooth-shaped electrodes; and a contro... | 09/09/1997 |
| 5613172 | Hybrid DC recharge method and apparatus for split recharge imaging Printing machines and systems which incorporate recharging stations comprised of two corona generating devices which act together to recharge a previously developed photoreceptor to a predetermined potential. The first corona generating device recharges t... | 03/18/1997 |
| 5466938 | Corona discharge device Grid wires arranged in an axial direction of a photoconductive drum have a positional relation with projecting electrodes arranged at regular intervals in an axial direction of the photoconductive drum at a position opposite to the surface of the photocon... | 11/14/1995 |
| 5321548 | Real image mode variable magnification finder optical system A real image mode variable magnification finder optical system comprising an objective lens system including a rotatable prism, an image erecting optical system for erecting an image formed by the objective lens system and an eyepiece lens system having a... | 06/14/1994 |
