Class 399/289 - Having field curtain

Subclass of Class 399 - Electrophotography
Definition: Subject matter wherein toner (developing material) is transported
No. of patents: 33
Last issue date: 03/06/2012

Number	Title	Issue Date
8131192	Image forming apparatus for forming image on record medium A record-medium determining apparatus constituted such that a luminescent light source irradiates modulated light to a surface of a record medium, a part of reflected light by the record medium of this irradiated light is detected by a photodetector, the photodetect...	03/06/2012
8005409	Development device A development device includes an open-ended housing, a rotatable roller, an array of multiple primary electrodes, a voltage source, a sealing member, and a secondary electrode. The housing accommodates toner for application to the photoconductive surface through an ...	08/23/2011
7822373	Developer conveying device and image-forming apparatus with electrodes for conveying charged developer A developer conveying device includes a first guide member, a second guide member, and a plurality of electrodes arranged on the first guide member and the second guide member. The first guide member forms a first section of a conveying path of a charged developer. ...	10/26/2010
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
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
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
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
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
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
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
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
6684047	Image forming apparatus with reduced image defects An image forming apparatus has a latent image carrier on which a latent image is formed. A developer carrier conveys a one-component non-magnetic developer and develops the latent image either in close proximity to or in contact with the latent image carr...	01/27/2004
6597884	Image forming apparatus including electrostatic conveyance of charged toner An electrophotographic image forming apparatus of the present invention deposits charged toner on a latent image formed on a photoconductive drum or similar image carrier to thereby produce a corresponding toner image. The apparatus includes a toner flyin...	07/22/2003
6345161	Non-contact developing method, non-contact developing device and image formation device This invention relates to a non-contact developing method for applying a driving voltage, which is an AC voltage superimposed on a DC offset voltage, to a non-contact developing roller to develop toner, and which prevents the selective developing phenomen...	02/05/2002
6254221	Printing apparatus with focusing of toner particles Various methods and apparatus are disclosed for facilitating the loading, transportation, and modulation of toner particles on a print head, as well as the transfer of toner particles onto a print medium. These methods and apparatus relate to the optimiza...	07/03/2001
6219515	Vibrating travel wave grid An apparatus for developing a latent image recorded on an imaging surface, including a housing defining a chamber for storing a supply of developer material comprising toner; a donor member, spaced from the imaging surface, for transporting toner on the s...	04/17/2001
6070036	Multizone method for xerographic powder development: voltage signal approach An apparatus for developing a latent image recorded on an imaging surface, comprising, a housing defining a chamber storing a supply of developer material; a donor member, spaced from the imaging surface, for transporting developer material on the surface...	05/30/2000
5920750	Connection between a compact electrical circuit and 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, the required high voltage and low voltage circuitry is placed on a printed flexible circuit ...	07/06/1999
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
5842094	Conveying device for magnetizable particles An apparatus used in electrophotographic printing or copying for conveying magnetically attractable toner or developer particles that includes a stator, electric windings, and an end-plate made of magnetizable material arranged in parallel with the major ...	11/24/1998
5822652	Compact design for combination of an electrical circuit with a segmented electrode development roll There is disclosed a compact design for the electronic circuits required to provide electrical contact to a SED roll of a segmented electrode development unit. In this invention, all the required high voltage and low voltage circuitry is placed on a print...	10/13/1998
5761591	Developing apparatus with means for carrying developer by utilizing the action of electric field curtain A developer is stored in a developer storing section arranged above, below or beside an image carrier on which an electrostatic latent image is formed. A carrying path, provided on its surface with a mechanism to generate an electric field curtain, carrie...	06/02/1998
5717986	Flexible donor belt A development system which includes a flexible donor belt having groups of electrode array near the surface of the belt is disclosed. The Electrode array has group areas in which perform the function of: Loading; Transferring; Developing; Transferring and...	02/10/1998
5463452	Single-component developing apparatus A single-component developing apparatus comprising a developer holding member having a peripheral surface, a power supply section applying an AC developing bias voltage to the developer holding member, the AC developing bias voltage having a waveform with...	10/31/1995
5323214	Image forming apparatus having an electrostatic actuator An electrostatic actuator for forming an electric field for transporting the particles of a developer having a predetermined charge in a predetermined direction. A plurality of stripe-like drive electrodes are continuously formed on only one of opposite s...	06/21/1994
4937630	Image forming apparatus employing non-magnetic and magnetic toner An image forming apparatus employs a non-magnetic developing agent and a magnetic developing agent which have been charged to opposite polarities to develop at least first and second latent images formed on an image carrier in response to image informatio...	06/26/1990
4508052	Developing device A developing device is provided with a nonmagnetic sleeve being rotatable and buried in a mixture of a nonmagnetic toner and a magnetic carrier in a casing. A magnet is contained in the sleeve so that a magnetic brush is formed from the mixture on the sle...	04/02/1985
4480911	Developing apparatus and a developing method of an electrostatic image In an electrostatic copying apparatus of the type in which a magnetic toner is applied to an image holder such as a drum from a developing roller which in turn receives the toner from a supply roller, a source of relative positive and negative voltages is...	11/06/1984
4385829	Image developing method and device therefor An electrostatic latent image developing method and a device therefor, featured in supplying one-component magnetic developer onto a developer-feeding non-magnetic bearing member to form thereon a magnetic brush of developer under the effect of a magnetic...	05/31/1983
4383497	Developing device A developing device of a construction including a magnetic device to form a magnetic brush with a magnetic carrier which charges and attracts single component, non-magnetic toner particles, a developer conveying device which receives the attracted toner p...	05/17/1983
4264185	Two color electrostatographic apparatus An imaging unit forms a bipolar electrostatic image of a two color original document on a photoconductive drum (12). A first developing unit (13) applies a toner (16) of a first color and polarity to the drum (12) and a second developing unit (14) applies...	04/28/1981

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Class 399/289 - Having field curtain