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Class 209/127.4 - Free fall type particle charging


Subclass of Class 209 - Classifying, separating, and assorting solids
Definition: Methods and means wherein electrostatic charges are applied
No. of patents: 67
Last issue date: 04/08/2008


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NumberTitleIssue Date
7355140Method of and apparatus for multi-stage sorting of glass cullets
A method and system for sorting different colored objects, preferably glass cullets, into separate groups of same colored objects comprising a plurality of sorting devices for receiving an input feed of different colored objects and sorting the different colored obj...
04/08/2008
7351929Method of and apparatus for high speed, high quality, contaminant removal and color sorting of glass cullet
A system for sorting a mixed stream of different colored cullet into separate groups of same colored cullet comprises a light emitting source for transmitting light, such as white light, through a cullet, and a camera having a plurality of pixels for receiving light...
04/01/2008
7329545Methods for sampling a liquid flow
In a method for sampling a continuous liquid flow, the liquid flow is supplied to a surface along an input flow path. The liquid flow is sampled by forming a sample droplet from a portion of the liquid flow. The sample droplet is moved along an analysis flow path to...
02/12/2008
7232687Multiple sorter monitor and control subsystem for flow cytometer
An optical illumination and monitoring subsystem controls the operation of a flow cytometer having a carrier fluid that flows along a channel coupled to a droplet generator, which controls a point at which droplets break off from the carrier fluid, and a droplet sor...
06/19/2007
7220341Controlling solids flow in a gas-solids reactor
This invention is to a process and system for controlling solids distribution in a gas-solids reactor. Solids distribution is controlled by controlling electrical charges between solid particles flowing between conductive surfaces within a gas-solids reactor. The el...
05/22/2007
7119298Method for electrostatically separating particles, apparatus for electrostatically separating particles, and processing system
An electrostatic separation apparatus for conductive particles and insulating particles with reduced separation time and improved separating capability, comprises a substantially flat-plate shaped bottom electrode (26) provided on lower side, a substantially ...
10/10/2006
7105041Grid type electrostatic separator/collector and method of using same
An electrical type grid electrostatic collector/separator removes particles from an air stream. The apparatus includes multiple parallel grids that act as the porous material, enclosed in a sealed compartment so that the entrained air flows parallel and between one ...
09/12/2006
7041153Method of measuring floating dusts
In a method of measuring particles floating in an atmosphere, the atmosphere containing the particles is sucked into a container, ions are generated from a discharge electrode disposed in the container to charge the particles with the ions. A dust-collecting electro...
05/09/2006
7041925Apparatus for the electrostatic separation of particulate mixtures
Apparatus for the electrostatic separation of a mixture of particles that exhibit difference in electrical conductivity, comprising: a conductive surface to which conducting particles lose their charge; feeding means for feeding the mixture of particles onto the con...
05/09/2006
6951992Corona and static electrode assembly
A corona and static electrode assembly is attachable to a frame of an existing electrostatic separator and includes a pair of oppositely spaced end panels and an elongate corona support member disposed inwardly of and supported by the respective end panels. The coro...
10/04/2005
6927354Tribocharging and electrostatic separation of mixed electrically insulating particles
An apparatus for tribocharging particles of electrically insulating materials has a rotatable drum (1), made of a metallic material, for containing the particles. The drum has an inlet (11), for charging material, and an outlet (13), for dischar...
08/09/2005
6923848Collecting apparatus of floating dusts in atmosphere
A collecting device for collecting particles floating in the atmosphere includes a collecting container; a pump for sucking the atmosphere into the collecting container; a discharge electrode disposed in the collecting container for generating single polarity ions t...
08/02/2005
6911132Apparatus for manipulating droplets by electrowetting-based techniques
An apparatus is provided for manipulating droplets. The apparatus is a single-sided electrode design in which all conductive elements are contained on one surface on which droplets are manipulated. An additional surface can be provided parallel with the first surfac...
06/28/2005
6903294Apparatus for separating plastic chips
A first and second electrostatic sorting sections are arranged below a tribo-electrifying device in this order in a vertical direction to form a sorting electrostatic field between a drum electrode and an opposing electrode. Plastic pieces separated from the other p...
06/07/2005
6797908High-tension electrostatic classifier and separator, and associated method
The electrostatic classifier and separator is supported by a housing and includes a corona classifier section for classifying particulate materials according to size. Corona element supplies mobile ions for bombarding particulate materials dropping down a passageway...
09/28/2004
6789679Method and apparatus for separating particles
The invention concerns a method and apparatus for separating mineral particles according to their dielectric and/or electrophysical properties. In one practical example, rutile particles can be separated from zircon particles. In the method, the mineral particles wh...
09/14/2004
6746873Vibratory system for a sorting flow cytometer
A flow cytometry system is disclosed for oscillating the exterior of a flow cytometer nozzle. Oscillating the exterior of a flow cytometer nozzle at selected oscillations or a sweeping range of oscillations disintegrates particles and gas entrapped within the flow c...
06/08/2004
6743870Process for early detection of reactor fouling in gas phase polymerization
A process for early detection of reactor fouling occurring during a gas phase polymerization of olefin(s) using a fluidized bed reactor having a fluidization grid fitted with detection devices. ...
06/01/2004
6723938Electrostatic conductive induction separator
A particle separator for the separation of particulate mixture having species that exhibit difference in electrical conductivity. The separator has a conductive surface including a separation zone, has feeder means for feeding the species to the separation zone, and...
04/20/2004
6681938Device and method for separating minerals, carbon and cement additives from fly ash
A process for separating organic and inorganic particles from a dry mixture by sizing the particles into isolated fractions, contacting the sized particles to a charged substrate and subjecting the charged particles to an electric field to separate the pa...
01/27/2004
6589792Method and apparatus for flow cytometry
A flow cytometer (20) capable of utilizing an imaging system including a sensor (88) to determine various properties of the flow cytometer (20). Importantly, the imaging allows for determination of a drop delay time (154). Other characteristics that can b...
07/08/2003
6589314Method and apparatus for agglomeration
A size preferential electrostatic agglomerator is provided for agglomerating small particles with larger "carrier" particles. The agglomerator includes an inlet for receiving a gas flow, a separator for separating the gas flow into flow streams based on t...
07/08/2003
6390302Method and apparatus for separating particles
The invention concerns a method and apparatus for separating mineral particles according to their dielectric and/or electrophysical properties. In one practical example, rutile particles can be separated from zircon particles. In the method, the mineral p...
05/21/2002
6372506Apparatus and method for verifying drop delay in a flow cytometer
An apparatus and method for verifying the drop delay in a flow cytometer, which is indicative of the time that elapses from a moment at which a particle of interest is detected at an interrogation point in the flow of cytometer to the moment at which a so...
04/16/2002
6359246Process and device for separating broken beans and shells
The invention concerns a process as well as an apparatus for separating broken goods, consisting of broken nibs or beans and their shells and especially the separation of broken cacao beans (nibs) from the cacao shells in an electrostatic manner. In this ...
03/19/2002
6248590Method and apparatus for flow cytometry
A flow cytometer capable of utilizing an imaging system to determine various properties of the flow cytometer. Importantly, the imaging allows for determination of a drop delay time. Other characteristics that can be determined include at least the width ...
06/19/2001
6225587Electrostatic separation of chaff from grain
A method and device for the electrostatic separation of chaff from grain. An nonconductive continuous belt moves a mixture of grain and chaff past an ionizing electrode, which imparts an electrical charge to the grain particles and the particles of chaff ...
05/01/2001
6211477Electrostatic deceleration system for flow cytometer
An electrostatic deceleration system is provided for use with a flow cytometer to decelerate the movement of electrically charged droplets formed by the flow cytometer in order to minimize damage to the cells contained in the droplets when the droplets ar...
04/03/2001
6168029Method for separating electrically conductive mineral components from electrically non-conductive mineral components of an ore
An improved method for separating electrically conductive components of an ore or mineral sand from electrically non-conductive components of the ore or mineral sand is disclosed which includes processing the ore, adding a polymer, such as an anionic poly...
01/02/2001
6140598Method for separating polymer-salt mixtures
The present invention relates to a method of triboelectric separation of organic polymers and salts, specially organic polymers containing sulfur, such as polyarylene sulfides and a halogenide or a carboxylate of alkaline metals, alkaline earth metals, am...
10/31/2000
6074458Method and apparatus for separation of unburned carbon from flyash
Apparatus and method for separating carbon particles from flyash includes one of increasing a relative humidity of the flyash or decreasing the relative humidity of the flyash to within an optimum humidity range, and introducing the flyash within the opti...
06/13/2000
6072140Method and apparatus for electrically charging and separating particles
A method and apparatus for separating particles provides comingled particles including a first group of particles having a weight and a triboelectric propensity and a second group of particles each having a weight less than the particles in the first grou...
06/06/2000
6064022Electrostatic separation of particles
An apparatus and a process for subjecting a free falling stream of particles to an electrostatic field, between two rows of oppositely charged electrostatic rotating electrodes to effect a separation between particles of different electrostatic properties...
05/16/2000
6034342Process and apparatus for separating particles by use of triboelectrification
A process and apparatus for subjecting a mixture of two types of electrically charged particles to intense physical contact through a pneumatic transfer modified by turbulent flow and path interruptions to produce surface electrical charges on the particl...
03/07/2000
6011229Electrostatic separator for classifying triboelectrically charged substance mixtures
An electrostatic separator of the free-fall type for classifying triboelectrically charged substance mixtures. This separator has a separate voltage source connected to each of the electrodes forming a pair of electrodes in such a way that the one voltage...
01/04/2000
5967331Method and apparatus for free fall electrostatic separation using triboelectric and corona charging
A free-fall separator apparatus for mixed particles. The apparatus includes a screw feeder for triboelectrically charging the particles, a feed hopper for releasing the tribocharged particles in a laminar flow path between a first electrode structure and ...
10/19/1999
5944875Triboelectric separator with mixing chamber and pre-separator
A triboelectrostatic separation apparatus includes a mixing chamber having opposed first and second charging ports, a separator having a separation chamber, first and second electrodes, and a variable voltage source for applying respective positive and ne...
08/31/1999
5938041Apparatus and method for triboelectrostatic separation
A triboelectrostatic separation apparatus includes a separator with an inlet, a separation chamber, first and second electrodes, a variable voltage source for applying respective positive and negative voltage potentials to the electrodes, a pair of separa...
08/17/1999
5885330Separation system and method of unburned carbon in flyash from a coal-fired power plant
An apparatus and method for reducing the amount of unburned carbon in raw flyash, wherein raw flyash containing unburned carbon is introduced into the tribocharger, the tribocharger producing positive and negative surface charges on the respective particl...
03/23/1999
5845783Method and apparatus for treating fly ash
A method and apparatus for separation of carbonaceous particles from fly ash utilizes an electrostatic separator having a number of separation zones arranged to define a downward serpentine pathway for particulate material. The separation zones include sp...
12/08/1998
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