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| Number | Title | Issue Date |
| 7340204 | Color image forming apparatus and process cartridge therefor A color image forming apparatus including a first-color developing unit configured to form a toner image on the photoconductive belt; and a second-color developing unit and successive developing units, at least the second-color and successive developing units each i... | 03/04/2008 |
| 7235123 | Particle transport and near field analytical detection Particle collection, transport, and detection systems are disclosed. The systems are uniquely adapted for collecting or concentrating particles from a flowing medium and then transporting the collected particles to a desired location or for subsequent analysis. Elec... | 06/26/2007 |
| 7224917 | Method and system for reducing toner abuse in development systems of electrophotographic systems An improved development system for an electrophotographic system includes a reload defect detector for generating a signal corresponding to a potential for reload defect detected in an image to be developed by an electrophotographic system; and a magnetic roll speed... | 05/29/2007 |
| 7204583 | Control electrode for rapid initiation and termination of particle flow An electrostatic gating assembly utilizing at least three electrodes is disclosed. The assembly is particularly well suited for controlled administration of small particles. ... | 04/17/2007 |
| 7200352 | Developing apparatus, developing method, image forming apparatus, image forming method and cartridge thereof A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes ar... | 04/03/2007 |
| 7197259 | Developing apparatus and image forming apparatus that incorporates the developing apparatus A developing apparatus includes a developing roller and a sealing member. The developing roller applies toner to an electrostatic latent image to develop the electrostatic latent image. The sealing member presses the developing roller to seal the developer. The appa... | 03/27/2007 |
| 7197268 | Current measurement circuit for transformer with high frequency output A printer apparatus includes a photoreceptor, a magnetic roll, an electrode, a current source coupled to the electrode, the current source having a signal generator coupled to an input winding of a transformer that exhibits a parasitic capacitance; and a current mea... | 03/27/2007 |
| 7188934 | Electrostatic gating Various systems and techniques are disclosed for stopping, selectively controlling, and optimizing a flow of particles in a flowing stream. The systems and techniques utilize a multi-electrode assembly and various voltage waveforms applied to those electrodes. The p... | 03/13/2007 |
| 7171136 | Power supply for hybrid scavengeless development type image forming system A power supply for a hybrid scavengeless development (HSD) image forming system which generates three voltages, a mag voltage, a donor voltage and a wire electrode voltage. The power supply outputs square waveforms for generating toner clouds to maximize the voltage... | 01/30/2007 |
| 7149460 | Systems and methods for electron charging particles Electron charging of particles, as may be associated with electrographic and/or xerographic image forming devices, powder coat finishing devices and/or guns, or the like, is performed by subjecting a stream of particles to electron bombardment from at least one elec... | 12/12/2006 |
| 7076193 | Wire module for developer unit An apparatus for developing in a development zone a latent image recorded on a surface, including a housing defining a chamber storing at least a supply of toner therein; a donor member disposed of at least partially in the chamber of the housing and spaced from the... | 07/11/2006 |
| 7062204 | Classifier, developer, and image forming apparatus A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electros... | 06/13/2006 |
| 7035577 | Developing apparatus, image forming apparatus and toner replenishing method The invention provides a developing apparatus, an image forming apparatus and a toner replenishing method that can restrain deterioration of toner and can stably form high quality image. Replenishing bias voltage is applied to a developing roller and a replenishing ... | 04/25/2006 |
| 7024142 | Developing apparatus, developing method, image forming apparatus, image forming method and cartridge thereof A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes ar... | 04/04/2006 |
| 6999703 | Ion toner charging device A device for ion charging airborne toner particles for the development of electrophotographic images is proposed. The ion toner-charging device subjects an airborne stream of toner particles to unipolar gas ions in the presence of an applied alternating electric fie... | 02/14/2006 |
| 6969160 | Ballistic aerosol marking apparatus A toner gating apparatus for supplying toner through an aperture to a gas channel having a propellant stream. The toner gating apparatus has a traveling wave grid having electrodes. A first gating electrode is located proximate a first side of the aperture. A second... | 11/29/2005 |
| 6947691 | Electrostatic transportation device, development device and image formation apparatus An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the el... | 09/20/2005 |
| 6941098 | Classifier, developer, and image forming apparatus A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electros... | 09/06/2005 |
| 6901231 | Developing apparatus, developing method, image forming apparatus, image forming method and cartridge thereof A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes ar... | 05/31/2005 |
| 6901232 | Developing apparatus and image forming apparatus using progressive wave electric field transport On surfaces of insulating layers 1b and 1c of a transportation member 1, a protective layer 1d having a volume resistivity of 1010 Ω·cm to 1017 Ω·cm is so laminated that a sum of thickness of... | 05/31/2005 |
| 6895202 | Non-interactive development apparatus for electrophotographic machines having electroded donor member and AC biased electrode A non-interactive development system generates a toner cloud in a development zone by an AC biased stationary electrode positioned in contact with the back surface of a movable toned dielectric donor belt having a patterned electrode structure on the front surface t... | 05/17/2005 |
| 6708014 | Electrostatic transportation device, development device and image formation apparatus An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the el... | 03/16/2004 |
| 6674986 | Insulated journals for a donor roll A donor structure for developing toner images to an image receiving surface, said structure including a core structure; end caps including journal portions attached to said core structure;a bearing for operatively supporting said donor structure in an ima... | 01/06/2004 |
| 6308033 | Image forming method and apparatus using charged particles When developing an electrostatic latent image on an electrostatic latent image support by use of mist-like charged particles, a developing electrode is provided at a space from the electrostatic latent image support to extend substantially in parallel to ... | 10/23/2001 |
| 6292643 | Printing system for applying a mixed combination of colorants for one separation to a photoreceptor In a xerographic printer, the use of traveling wave toner transport devices to deliver toner from the individual single color toner sumps to an intermediate traveling wave belt by utilizing traveling wave roll-type devices, and the traveling wave belt to ... | 09/18/2001 |
| 6226483 | Charging roller and processes thereof An article including a cylindrical roller core; and a titanium dioxide ceramic layer bonded to the exterior of the cylindrical core.... | 05/01/2001 |
| 6208824 | Apparatus for non-interactive electrophotographic development using resonating donor member An apparatus for non-interactive, dry powder development of electrostatic Images composed of solid areas and fine lines areas on an imageable surface including a housing containing developer material; a magnetic member, spaced a predefined distance from s... | 03/27/2001 |
| 6154626 | Development roller A development roller for use in a machine in which marking particles are advanced toward a latent image to form a developed image is provided. The development roller includes a conductive body. The conductive body includes a central portion, a peripheral ... | 11/28/2000 |
| 6023600 | Ion charging developement system An apparatus for developing a latent image recorded on an imaging surface, including: a housing defining a reservoir storing a supply of developer material wherein the developer material having predefined triboelectric charge about 20 to 30 microCoulombs/... | 02/08/2000 |
| 5999780 | Controllably conductive polymer compositions for development systems Controllably conductive polymer compositions may be used in electrophotographic imaging developing systems, such as scavengeless or hybrid scavengeless systems or liquid image development systems. The conductive polymer compositions includes a charge-tran... | 12/07/1999 |
| 5978633 | Apparatus for preventing wire strobing in a hybrid scavengeless development system A developer unit for developing a latent image recorded on an image receiving member with marking particles, to form a developed image, including an image receiving member moving at a predetermined process speed. A donor member is spaced from the image re... | 11/02/1999 |
| 5950057 | Hybrid scavengeless development using ion charging An apparatus and method for enhancing toner charge level in a hybrid scavengeless development system. The system includes a housing defining a chamber storing a supply of developer material including toner; a toner donor member spaced from the surface and... | 09/07/1999 |
| 5943539 | Hybrid scavengeless development using a method for preventing wire strobing A developer unit for developing a latent image recorded on an image receiving member with marking particles, to form a developed image, including: a drive mechanism for moving the surface of the image receiving member at a predetermined process speed. A d... | 08/24/1999 |
| 5940667 | Asymmetrical donor member voltage The present invention is an apparatus that develops a latent image recorded on a surface with toner. An electrically biased electrode member in the development zone between the photoconductive member and the donor roll detaches toners from the donor roll ... | 08/17/1999 |
| 5933684 | Interactivity sensor for electrophotographic printing An apparatus in which the developability and interactivity of electrostatically charged particles in a mixture of particulate material is measured. The sensor apparatus includes a transparent member positioned closely adjacent to a developer roller of an ... | 08/03/1999 |
| 5923932 | Hybrid scavengeless development using a method for preventing a ghosting print defect A method and apparatus for preventing ghosting defect, which appears as a lightened ghost image of a previously developed image in a halftone or solid. The defect is due to the different characteristics of the toner that has been reloaded into the recentl... | 07/13/1999 |
| 5893015 | Flexible donor belt employing a DC traveling wave An apparatus for transporting charged particles in a predetermine path which includes a donor member that is adapted to move charged particles on the surface thereof in the predetermined path. The donor member includes an electrode array on the outer surf... | 04/06/1999 |
| 5892303 | Compact design for combination of an electrical circuit with a segmented electrode development roll A compact design for the electronic circuits to provide electrical contact to a SED roll of a segmented electrode development unit is provided. In this invention, all the required high voltage and low voltage circuitry is placed on a printed flexible circ... | 04/06/1999 |
| 5890042 | Hybrid jumping developer with pulse width compensated toner mass control A hybrid jumping development system utilizing two component developer and providing an improved device for controlling developed toner mass. Toner is metered onto a donor structure and a toner cloud is formed in a development nip between the donor structu... | 03/30/1999 |
| 5864734 | Development system producing reduced airborne toner contamination An apparatus for powder cloud development of an electrostatic image in which a donor roll advances toner to a development zone adjacent the image, and in which precipitating electric fields are provided at the entrance and exit of the development zone to ... | 01/26/1999 |
