Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3643128 A
Publication typeGrant
Publication dateFeb 15, 1972
Filing dateSep 15, 1969
Priority dateSep 15, 1969
Publication numberUS 3643128 A, US 3643128A, US-A-3643128, US3643128 A, US3643128A
InventorsTestone Anthony Q
Original AssigneeTestone Electrostatics Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ionized air projector
US 3643128 A
Apparatus for projecting ionized air comprising a conductive tube connected to an air source and to an AC source, and having a row of extending points, beside which are air discharge passages; a grounded conductive shield around the tube has opposed rows of air inlet and outlet apertures, the former receiving the ends of the points.
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

0 United States Patent 1151 3,643,128 Testone 5] Feb. 15, 1972 [54] 1ONIZED AIR PROJECTOR 3,111,605 11/1963 Muller et al. ..317/4 [72] Inventor: Anthony Q. Testone, Lansdale, Pa. FOREIGN PATENTS 0R APPLICATIONS [731 Assigm i West 531,114 7/1955 ltaly ..317/2 F 885,450 8/1963 Germany..... ..317/2 F [22] Filed: Sept. 15, 1969 973,242 10/1964 Great Britain ..3l7/2 F [21] Appl' 857532 Primary Examiner-J. D. Miller Assistant Examinerl-larry E. Moose, Jr. [52] 0.8. CI ..317/4, 317/2 F, 250/495 GC yni n r n R ich [51] lnt.Cl. [58] Field of Search ..317/2 F, 4, 262 A; ABSTRACT 250/495 TC; 313/325 Apparatus for projecting ionized air comprising a conductive 56] Reierences Cited tube connected to an air source and to an AC source, and having a row of extending points, beside which are air discharge UNiTED STATES PATENTS passages; a grounded conductive shield around the tube has 3,179,849 4/1965 3,120,626 2/1964 Schweriner 3,396,308 8/1968 Schweriner ..317/2 F opposed rows of air inlet and outlet apertures, the former receiving the ends of the points.

Whitmore.... ..3 17/4 9 Claims, 3 Drawing Figures 11 Y/ M, e 14/ 36 \1 1f 24 T i \\\\1!ll\ v' 1 l J11 /7]TIIII' llll PATENTEDFEBIS m2 3.643.128

l8 3O 3O I ////3I 1////////7 1mv////// /r INVENITOR 3 ANTHONY Q. TESTONE BY $1722, FQ/ZZIOI/ anti ATTORNEYS IONIZED AIR PROJECTOR BACKGROUND OF THE INVENTION The present invention relates to a device for projecting a stream of ionized air, air being ionized and then carried along by a stream of air under pressure.

lnrmany industries, such as the plastic industry, the printing industry and the paper converting industry, static electricity is generated by the machinery being used and/or the work material, and has a deleterious effect upon the operation of such machinery. To overcome this, devices have been provided to reduce or eliminate the static electricity and among the devices for this purpose are so-called static eliminators, these-being devices for generating a stream of air which includes ionized air. The ionized air is generated in these devices by the application of relatively high-voltage alternating current electricity to a structure including a series of ionizing points. Where it is desired to eliminate static at a particular location, or in a particular region, the ionized air which is generated is blown by a'compressed airstream in the desired direction. Devices of this nature which have been previously used have either not provided for the projection of the ionized air, or where a barlike structure was provided for ionizing, the air for conveying the ionized air was obtained from an exterior compressed air tube positioned so as to direct compressed air tangentially to the ionizing apparatus. Such a construction was unwieldy, costly to manufacture, and was difficult or impossible to position in much existing machinery with which it was intended'to be used.

Among the objects of the present invention are to provide an ionized air projector of barlike configuration which is economical to manufacture, which can be positioned in relatively small spaces within existing machinery, which will project ionized air'at a considerable distance in order to eliminate static electricity, and which is efficient and reliable in operation.

I SUMMARY OF THE INVENTION An apparatus is provided for ionizing air and for projecting theionized air in a carrier airstream. An inner tube of conductive material has a row of spaced, generally outwardly extending ionizing points, which are preferably radially extending from the tube. Air passages are provided adjacent each of the points, and the tube is closed at one end, being connected to a source of compressed air at the other end,so that compressed air enters the tube and leaves through the small air passages, one of which lies on either side of each of the ionizing points. The tube is provided at its other end with a connection to a source of high-voltage alternating current. Annular insulators on the tube support an outer shield of conductive material, which is connected to ground. This shield has a first row of air outlet apertures, each ionizing point terminating substantially at the center of each aperture. A row of air inlet apertures is provided, the apertures of the two rows being diametrically opposed.


FIG. I is a perspective view, with parts broken away, of an ionized air projector in accordance with the present invention.

FIG. 2 is a cross-sectional view taken on the line 22 of FIG, 1.

FIG. 3 is a cross section view taken on the line 3-3 of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings, wherein like or corresponding reference numerals are used to designate like or corresponding parts throughout the several views, there is shown in FIG. I an ionizing projector of generally barlike, elongate configuration. The projector 10 comprises an inner tube 12 of conductive material connected at one end with a conduit 14 which leads from a source of compressed air 16. The other Ann:

end of tube 12 is connected by a lead 18 to a high-voltage alternating current generator 20. As may be seen in FIG. 1, tube 12 has a plurality of ionizing points 22 extending therefrom. The points 22 are in a row, and are axially spaced along the tube 12. Air passages 24 extend through the wall of tube 12 (see also FIG. 2).

Supported in surrounding relationship to the tube 12 is a shield 26 of generally tubular configuration, shield 26 having a first row of air outlet apertures 28 and a second row of air inlet apertures 30. Shield 26, which is of generally tubular configuration, has a conductor 32 secured to it, which is connected with ground.

Referring now to FIG. 2, there may be seen the conductive tube I2 and an ionizing point 22, which may be seen to have its head pressed into an opening in the wall of tube 12, and its point or terminal end in the air outlet aperture 28 in tubular shield 26. An air passage 24 may be seen to be adjacent the ionizing point 22, and as indicated, in its preferred form, the axis of ionizing point 22 is coincident with the axis of air outlet aperture 28 and air inlet aperture 30. Further, the axis of each of the air passages 24 is substantially parallel to the axis of ionizing point 22.

Referring now to FIG. 3, the tube 12 will be seen to be closed at its end opposite the end connected with conduit 14 by a suitable plug 34. Inwardly of the plug 34 and conduit 14 are annular insulator discs 36, of which a plurality may be used, as deemed necessary, in accordance with the length of the projector 10.

Also to be seen in FIG. 3 are arrows representing the issuance of air from the tube 12 through the air passages 24, that air, being under compression, issuing at relatively high velocity generally radially of tube 12 and carrying ions generated at the points 22 outwardly of the projector 10 through the air outlet apertures 28 in the tubular shield 26. Due to the high velocity of the air issuing through the air passages 24, air will be drawn into the space between the tube 12 and the shield 26, through the air inlet apertures 30, which may be seen to be in radial alignment with the air outlet apertures 28, respectively.

Ionized air generated at the several-ionizing points 22 is projected radially outwardly of the projector 10, and the ionized air will carry for a relatively great distance, distances of approximately 5 feet being obtained thereby achieving significantly good results of static elimination.

The ionized air projector of the present invention may be made in various diameters and in various lengths, the diameter of tube 10 being conventionally three-fourth inch to 1 inch and the voltage of the alternating current may be in the range between 3,000 and 7,000 volts. The voltage will vary depending upon such parameters as the diameter of the tube.

There has been provided an economical and efficient ionized air projector. The ionized air projector in accordance with the present invention is capable of being used in a wide variety of installations, and occupies a minimum of space while having the ability to project ionized air over a relatively great distance for the efficient and effective removal of static electricity from machinery and material. The utilization of the inner tube for both current conduction and the passage of compressed air provides an easily placed ionizing air projector, and the orientation of the ionizing points, the air passages and the air inlet and outlet apertures relative to each other provides for effective ionized air generation and projection.

It will be obvious to those skilled in the art that various changes may be made without departing from the spirit of the invention and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.


1. Apparatus for projecting ionized air comprising:

a tube of conductive material having a series of ionizing points extending therefrom;

means for connecting said tube with a source of compressed air and with a source of alternating current;

air passage means extending through the wall of said tube for directing air generally along said points; grounded shield means of conductive material about said tube and having outlet apertures for air from within said 7 each said point terminating substantially within a said aperture; and

additional aperture means for admitting atmospheric air into the space between the tube and shield.

2. The apparatus of claim 1, and insulating means supporting said tube and shield means in spaced relationship.

3. The apparatus of claim 1, said points being in a line and, axially spaced along said tube.

4. The apparatus of claim 3, there being at least two said air passages between each two points.

5. The apparatus of claim 1, the axes of said points, said apertures and said air passage means being substantially parallel.

6. The apparatus of claim 1, said additional aperture means comprising inlet apertures in said shield means.

7. The apparatus of claim 1, said inlet apertures being in a row and said outlet apertures being in a row, the apertures of one row being diametrically opposite the apertures of the other row.

8. The apparatus of claim 7, wherein the axes of said points, said apertures and said air passage means are substantially parallel.

9. Apparatus for projecting ionized air comprising: a tube of conductive material, x a tubular shield of conductive material surrounding said tube, said shield having a first series of radially extending apertures therein, and a second series of apertures each diametrically opposed to an aperture of said first series, insulator means mounting said tube substantially concentrically within said shield,

- a row of points electrically connected with said tube and extending therefrom, said points being axially spaced along said tube and each terminating substantially within a said aperture of said first series,

air passages extending through said tube and directed generally toward the apertures of said first series,

said tube having one end closed and having at the other end means for connection to a source of air under pressure,

means for connecting said tube to a source of alternating current, and

means for grounding said shield.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3111605 *Jun 24, 1959Nov 19, 1963Bayer AgGaseous-ion generator for rooms in which there is a danger of explosion
US3120626 *Nov 7, 1960Feb 4, 1964Simco Co IncShockless static eliminator
US3179849 *Jul 15, 1964Apr 20, 1965Simco Co IncShockless ionizing air nozzle
US3396308 *Jul 2, 1965Aug 6, 1968Eastman Kodak CoWeb treating device
*DE885450A Title not available
GB973242A * Title not available
IT531114A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4007576 *Jun 19, 1975Feb 15, 1977Hercules IncorporatedMethod and apparatus for controlling static charges
US4038583 *Oct 28, 1975Jul 26, 1977Jacques Leon Georges BretonApparatus for the generation of negative or positive atmospheric ions
US4168973 *May 31, 1977Sep 25, 1979Agfa-Gevaert, A.G.Process for the transfer printing of electrostatic charge images using N2 atmosphere
US4188530 *Nov 14, 1978Feb 12, 1980The Simco Company, Inc.Light-shielded extended-range static eliminator
US4194232 *Mar 31, 1978Mar 18, 1980Cumming James MIon treatment of photographic film
US4198061 *Mar 6, 1978Apr 15, 1980Dunn Robert EElectrostatic-vacuum record cleaning apparatus
US4213167 *Mar 31, 1978Jul 15, 1980Cumming James MPlanar gas and ion distribution
US4271451 *Jul 20, 1976Jun 2, 1981Hercules IncorporatedMethod and apparatus for controlling static charges
US4302670 *Jul 17, 1979Nov 24, 1981Claude E. CorsonElectrogenic seed treater
US4349359 *Apr 14, 1980Sep 14, 1982Maxwell Laboratories, Inc.Electrostatic precipitator apparatus having an improved ion generating means
US4388274 *Dec 18, 1981Jun 14, 1983Xerox CorporationElectrography; air pollution control
US4523082 *May 5, 1983Jun 11, 1985Sturdevant Eugene JElectrode shield device
US4725731 *Jul 2, 1986Feb 16, 1988Xerox CorporationPhotoreceptor deletion control by utilization of corona wind
US4725732 *Jul 2, 1986Feb 16, 1988Xerox CorporationPin corotron and scorotron assembly
US4729057 *Jul 10, 1986Mar 1, 1988Westward Electronics, Inc.Static charge control device with electrostatic focusing arrangement
US5121286 *May 4, 1989Jun 9, 1992Collins Nelson HAir ionizing cell
US5229819 *Sep 5, 1991Jul 20, 1993Xerox CorporationProtective assembly for charging apparatus
US5592357 *Sep 10, 1993Jan 7, 1997The University Of Tennessee Research Corp.Electrostatic charging apparatus and method
US5686050 *Mar 28, 1995Nov 11, 1997The University Of Tennessee Research CorporationMethod and apparatus for the electrostatic charging of a web or film
US5895558 *Sep 25, 1996Apr 20, 1999The University Of Tennessee Research CorporationSurface treating polymer by applying asymmetrical voltage pulse to affect wettability
US5955174 *Apr 21, 1995Sep 21, 1999The University Of Tennessee Research CorporationElectrostatically charged by sequentially subjecting the web or film to a series of electric fields
US6059935 *Dec 22, 1998May 9, 2000The University Of Tennessee Research CorporationDischarge method and apparatus for generating plasmas
US6416633May 3, 2000Jul 9, 2002The University Of Tennessee Research CorporationResonant excitation method and apparatus for generating plasmas
US7170734Nov 19, 2002Jan 30, 2007Haug Gmbh & Co. KgAir ionization device
US7589949Oct 14, 2005Sep 15, 2009Seagate Technology LlcFluid assisted emitter tip and method
DE10157524B4 *Nov 23, 2001Oct 26, 2006Haug Gmbh & Co. Kg.Luftionisationsgerät
DE19855040C1 *Nov 28, 1998Apr 6, 2000Haug Gmbh & Co KgAir ionization device with corona discharge electrode arrangement has flow element with mutually inclined flow conducting surfaces for generating a divergent air flow
EP0644711A1 *Sep 19, 1994Mar 22, 1995Illinois Tool Works Inc.Ionizing air gun
WO1995007175A1 *Sep 9, 1994Mar 16, 1995Univ Tennessee Res CorpElectrostatic charging apparatus and method
U.S. Classification361/230, 250/326
International ClassificationH05F3/04
Cooperative ClassificationH05F3/04
European ClassificationH05F3/04