US3918641A - Electrostatic powder coating installation - Google Patents

Electrostatic powder coating installation Download PDF

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Publication number
US3918641A
US3918641A US534675A US53467574A US3918641A US 3918641 A US3918641 A US 3918641A US 534675 A US534675 A US 534675A US 53467574 A US53467574 A US 53467574A US 3918641 A US3918641 A US 3918641A
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United States
Prior art keywords
filter
installation
suction
cabin
powder
Prior art date
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Expired - Lifetime
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US534675A
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English (en)
Inventor
Ernst Lehmann
Robert Prinzing
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Gema Switzerland GmbH
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Gema AG
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Assigned to RANSBURG-GEMA AG, A CORP. OF SWITZERLAND reassignment RANSBURG-GEMA AG, A CORP. OF SWITZERLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GEMA AG APPARATEBAU
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/20—Arrangements for collecting, re-using or eliminating excess spraying material from moving belts, e.g. filtering belts or conveying belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/43—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by filtering the air charged with excess material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/45—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using cyclone separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/087—Arrangements of electrodes, e.g. of charging, shielding, collecting electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • Appl' 534675 compartment of the cabin is limited by one side or face of a filter moving through the cabin, the other [30] Foreign Application Priority Data face of which confronts the suction side of a suction Nov. 14, 1974 Switzerland 15177/74 device effective through the filter at the aforementioned internal compartment.
  • a cleaning device is op- [52 US. Cl. 239/15; 118/621; 317/3 eratively associated with the filter in Order to remove 51 Int.
  • the 5 Field f Search 239/3 15; 317/3; 117/17; cleaning device embodies a suction nozzle directed 11 21 towards the one face of the filter and which while interposing a separator is operatively connected with the 5 References Cited suction side of a suction blower.
  • the outlet of the sep UNITED STATES PATENTS arator is connected with a supply container.
  • the present invention relates to a new and improved construction of electrostatic powder coating installation.
  • electrostatic powder coatingat the present time cannot hardly be dispensed with in fabrication or manufacturing operations in consideration of the presently available advantages in contrast to wet spraying (for example, greater layer thickness per working operation, no solvent vapors, just to mention a few). Hence it is particularly incumbent to especially take into account two aspects during electrostatic powder coating in order to maintain such coating technique economically competitive with wet spraying.
  • a state-of-the-art installation by means of which it has been attempted to satisfy both of the above-mentioned aspects possesses a cabin in which there are arranged means coupled with a supply container for the purpose of delivering electrostatically charged powder.
  • a part of the internal space of the cabin is bounded by one face ofa filter moving through the cabin, the other face of which is in confronting relationship with the suction side of a suction device which is effective through the filter at the aforementioned internal space.
  • a cleaning device is associated in operative coaction with the filter for removing therefrom excess powder which has deposited thereon.
  • Another and more specific object of the invention is directed to constructing an installation of the previously mentioned type in such a manner that re-processing of the powder removed from the filter is practically superfluous, so that it can be delivered in a truly closed circulation system directly and continuously to the supply container with a minimum danger of contamination.
  • the cleaning device is equipped with a suction nozzle directed towards the one face ofthe filter, this suction nozzle, while interposing a separator, is connected with the suction side of a suction blower, the outlet of the separator being operatively coupled with the supply container.
  • the removal of the powder from the filter by means of the installation of this invention occurs therefore by carrying out a suction operation, i.e., pneumatically, which automatically provides the result that the removal in the suction line takes place to a certain extent in suspension, whereby the thus occurring turbulence maintains the friability or trickling properties of the powder or. again establishes such properties in the event such is even necessary. Additionally due to the connection between the outlet of the separator and the supply container there is established a truly closed circulation system for the excess powder which permits of a continuous working operation.
  • a suction operation i.e., pneumatically
  • the filter advantageously constructed as a filter band can extend out of the cabin in its direction of movement, the suction nozzle then advantageously being arranged at the region of the section of the filter band located externally of the cabin.
  • the replenishment of fresh powder and its admixing with the excess powder circulating throughout the closed circulation system is extremely simple-
  • an outlet of an infeed device for fresh powder which is disposed ahead of the suction nozzle, i.e. upstream thereof when considered with respect to the direction of movement of the filter band.
  • the outlet of the infeed device just men tioned above is arranged to be directed towards the one face or side of the filter. Consequently, there is not only sucked through the suction nozzle the excess powder, rather also the fresh powder deposited upon the same side or face of the filter, so that during the course of this operation both of the powder components are automatically intimately admixed with one another.
  • a device acting at the filter for removal of the electrostatic charge there can be arranged a device acting at the filter for removal of the electrostatic charge. In this way it is possible to remove any existing electrostatic residual charge from the excess powder deposited upon the filter.
  • the connection prevailing be tween the suction nozzle and the suction blower against deposition of the excess powder which flows through in suspension. it is possible to provide means for generating flow or current surges. In this way the suction action of the suction nozzle takes on a pulsating characteristic and in the connection line or conduit there is favored the formation of turbulence or vortexes.
  • a sieve mechanism Between the outlet of the separator and the supply container there can be provided a sieve mechanism. especially for the purpose of removing possibly entrained contaminants by sieving the powder prior to entry into the supply container and. if necessary, to again rcestablish the trickling or friable properties of the powder.
  • a conveyor mechanism which extends through the cabin 10 and by means of which there are delivered in the direction of the arrow 16 through a gantry-like opening (not shown) the articles or the like to be coated into the internal space or compartment 14, the gantry-like opening being conveniently provided for instance in the end wall 12. Further the articles can again be removed out of the cabin 10 by means of a similar opening which in this case is provided at the end wall 13.
  • the spray pistol 17 is connected via a connection line, for instance a hose 18 or equivalent, with a supply container 19 and by means of an infeed or delivery line 20 with a voltage source 21.
  • a connection line for instance a hose 18 or equivalent
  • an infeed or delivery line 20 with a voltage source 21.
  • the infeed or delivery line 18 there is delivered to the spray pistol 17 through the agency of conveying air the powder which is to be electrostatically charged.
  • the infeed line 20 there is furnished the electrical energy needed for electrostatic charging.
  • the infeed line 20 can be arranged in or at the hose 18.
  • the floor of the cabin 10 is formed by the upper face of the upper run 22 of an endless filter band 23 or equivalent structure, which is guided about deflecting rollers 24, 25 in the manner of a conveyor band.
  • deflecting rollers 24, 25 it is possible for one. such as the deflecting roller 25 to be driven through the agency of a chain drive or a shaft 26 by means of a gear or transmission motor 27 or the like in the direction of the arrow 28.
  • the lower face or side of the run 22 of the filter band 23 bears on the one hand upon a flange 29 which laterally protrudes and surrounds the open side of a suction vat or trough 30 and, on the other hand, bears upon a grate 31 formed for instance of a fine wire mesh, and which grate spans the open side of the vat or trough 30 and is substantially coplanar to the flange or flange means 29.
  • Internal compartment 32 of the vat 30 is connected by means of a connection line 33 with the suction side of a blower 34.
  • the outlet 36 is provided with a corona electrode 37 which radiates the upper face of the filter band run 22.
  • This electrode 37 is powered by a high-voltage source 39 through the agency of a connection line 'or conductor 38.
  • the corona electrode 37 serves the purpose of removing the residual charge adhering to the powder possibly present at the upper face of the run 22.
  • This corona electrode 37 could be equally replaced by another device which produces an ionized surrounding region. i.e., electrically conductive surrounding region, for instance by using a weak beta radiating device.
  • a delivery or infeed device which has been designated in its entirety by reference character 40.
  • This infeed device 40 possesses a filling funnel 4i or the like which supplies a dosing worm 43 driven by a motor 42.
  • the dosing worm 43 in turn extends practically over the entire width of the filter band 23.
  • This dosing device or dosing mechanism 40 serves the purpose of delivering to the installation new powder, whether such be of the same or a different quality, as shall still be more fully described hereinafter.
  • the delivery mechanism or device 40 has arranged thereafter a suction nozzle 44 possessing a suction slot 45 which likewise extends practically over the entire width of the filter band 23.
  • This suction nozzle 44 is connected via a device 46 for producing air surges or pulses with a connection conduit or line 47 leading to a separator 48 in the form of a cyclone, by way of example.
  • the separator 48 is coupled through the agency of a suction conduit 50 with the suction side of a blower 49, so that upon operation of the suction blower 49 there prevails a pronounced suction action in the con nection conduit 47.
  • the device 46 for generating the air surges serves the purpose of insuring that the suction action emanating from the blower 49 is not continuous rather pulsating, whereby there is rendered more difficult in any case, if not completely avoided, a deposition of the powder removed by the suction nozzle 44 from the filter band at the inner wall of the connection conduit 47.
  • This separator 48 possesses an outlet or discharge 51 by means of which there is continuously delivered the powder separated out at the separator 48 by means of the suction air, for instanc through the agency of a bucket wheel or sluice impeller 52 driven by a motor 53, to an oscillating or rotary sieve 54.
  • Both the bucket wheel or impeller 52 as well as also the oscillating or rotary sieve 54 are arranged in a closed housing, which among other things. serves 'the purpose of protecting against contamination the powder located upon the sieve 54, and, in the event there is omitted the impeller wheel 52, serves as sluice, in order to maintain the negative pressure prevailing in the separator 48 and preventing the generation of any false air currents.
  • the powder which has been prepared by the sieve or filter ,54 that is to say, to the extent necessary freed of possible contaminants and again rendered friable, arrives through the agency of a sieved material outlet'or discharge 55 directly and continuously in the supply container 19. Possibly existing coarser fractions of the powder removed by the suction nozzle 44 from the upper run 22, and which are not again comminuted by the action of the sieve 54, arrive via a waste conduit 56 in a waste or refuse container 57.
  • the pressure side of the blower 49 is connected with a pressure conduit 58 which, in turn, leads to the internal compartment 14 of the cabin l and there opens into a distributor conduit or pipe 59 having a multiplicity of openings 60.
  • the reason for this arrangement resides in the fact that the separa tor 48 as a general rule cannot be designed such that it completely separates out the powder from the powderair current existing in the connection conduit 47, because the danger thereby exists that the separated out powder particles will cake together or conglomerate in the separator 48, which prc hibits the direct reuse, i.e., the delivery into the supply container.
  • the upper run 22 of the filter band 23 passes approximately the following sections between the deflecting roller 24 and the driven deflecting roller 25.
  • a first section a there is deposited upon such upper run to an increasing degree excess powder coming out of the spray pistolor gun 17.
  • this deposition of excess powder emanating from the spray pistol l7 continues, whereby however there is added a residual amount of excess powder which was not previously separated out in the separator 48.
  • this powder is fixedly held in the filter material of the filter band 23 due to the suction action which prevails upon the travel of the filter band over the open side of the vat or trough 30.
  • FIG. 2 there is schematically illustrated a possible device or mechanism 46 for producing air surges or pulses.
  • the suction nozzle 44 with its suction slot 45, as well as the starting portion of the connection conduit or line 47.
  • a substantially pot-shaped widened portion 62 which directly merges with the suction nozzle 44 there is formed a type of conical valve seat 63 which coacts with a closure element or floating body 65 prebiased by a weak pressure spring 64 or the like.
  • a weak pressure spring 64 or the like When the installation is switched off the floating body 65 normally almost closes the through-passage formed by the valve seat 63.
  • a false air opening 66 is provided in the connection conduit 47 directly at the connection with the suction nozzle 44, this false air opening normally being closed by a flap member 67 or equivalent structure.
  • this flap 67 is periodically and briefly opened in the direction of the arrow 68, then, since the through flow cross-section of the false air opening 66 is considerably greater than the through flow cross-section between the upper run 22 and the slot 45, there prevails a powerful air surge.
  • the opening time of the flap or flap member 67 is calculated such that in this time the upper run only passes through a path of travel which is considerably smaller than the width of the slot 45.
  • the mode of operation of the described apparatus can be considered as follows:
  • the articles to be coated are moved through the cabin in the direction of the arrow 16.
  • the spray gun or pistol 17 generates in the internal compartment 14 a cloud of electrostatically charged powder particles, and which cloud, owing to the fact that a slight negative pressure prevails in the internal compartment 14, is limited to such internal compartment 14.
  • a large proportion of theelectrostatically charged particles thus deposit upon the articles to be coated and while adhering to such articles leave the cabin.
  • the proportion of the powder which has not found its way to the articles deposits upon the upper run of the filter band and thus arrives beneath the suction nozzel 44 where it is reclaimed and via the separator 48 again delivered to the supply container 19.
  • the powder accordingly moves through a first closed cycle or circulation system, starting from the supply container 19 through the hose [8 to the spray gun 17, from that location into the internal compartment or space 14 and after depositing on the run 22 arrives at the suction nozzle 44, then through the connection conduit 47 to the separator 48 and through the outlet 51 and the sieve 54 again arrives back at the supply container 19.
  • this circulation system is closed and practically only accessible in the sections 0 to e at the upper run.
  • a further powder circulation system is passed through by that part of the powder which is not separated out by the separator 48.
  • This'circulation system begins at the suction conduit 50, thereafter leads through the suction blower 49, through the pressure conduit 58, the distributor conduit 59 into the internal compartment 14, and after depositing on the run 22 continues up to the suction nozzle 44 and via the connection conduit 47 leads back to the separator 48. Also this closed cycle or circulation system is practically only accessible at the sec tions 0 to e of the upper run. In order to replace the powder consumed by the actually occurred coating of the articles or objects, fresh powder is likewise deposited upon the upper run 22 by means ofthe delivery device 40. Hence, the supply container 19 is not directly refilled, rather the fresh powder initially is deposited upon the excess powder and then taken up through the suction nozzle 44 whereby there occurs a powerful or forceful admixing.
  • the installation affords notable advantages. With such change initially no articles are delivered for instance any longer to the cabin. Then the hose conduit 18 is separated from the supply container and compressed air blown therethrough. The remaining parts of the installation operate as previously described. The powder still located in the installation passes through one ofthe two previously described circulation systems until it finally arrives at the supply container which is no longer coupled with the hose 18. At the same time it is possible for instance with the aid of a powerful industrial vacuum cleaner to subject the filter band 23 at the section f of the upper run to a cleaning action which deeply penetrates such upper run of the filter band. Of course at this point in time the delivery mechanism 40 is not in operation.
  • the supply container 19 can be replaced by an empty one, whereafter the delivery mechanism 40 can be charged with the new powder and the hose conduit 18 can be connected to the new supply container 19.
  • the installation is faultlessly charged with the new color without there being discernible with the naked eye at the formed coatings a contamination by powder particles of the preceding color. Apart from the short conversion time and the cleaning of the filter band 23 there are practically no deadtimes.
  • An electrostatic powder coating installation comprising a cabin, a supply container, means operatively coupled with the supply container for delivering electrostatically charged powder into the interior of the cabin, said cabin being provided with an internal compartment, a filter movable in a predetermined direction of travel through the cabin, said filter having opposed faces, one face of said filter bounding a part of the internal compartment of the cabin, a suction device having a suction side and effective through the filter at said internal compartment, the other face of said filter confronting the suction side of the suction device, a cleaning device operatively associated with the filter for removing excess powder which has deposited on the filter, said cleaning device possessing a suction nozzle directed towards the one face of the filter.
  • a suction blower having a suction side, a separator, the suction nozzle being connected by means of the separator with the suction side of the suction blower, said separator having an outlet flow communicating with the supply container.
  • said filter comprises a filter band which moves along said predetermined direction of travel and extends out of said cabin in the direction of travel of said filter band.
  • said suction nozzle being arranged at the region of a section of the filter band located externally of the cabin.
  • connection conduit dispose-d between the suction nozzle and the separator said connection conduit having a throughpassage and being provided with an oscillating floating body for periodically throttling said throughpassage.
  • connection conduit arranged between the 10 suction nozzle and the separator, means defining a false air opening provided in the connection conduit and controlled by a to-and-fro movable closure element.
  • suction blower has a pressure side, and means for connecting the pressure side with the internal compartment of the cabin.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US534675A 1974-11-14 1974-12-20 Electrostatic powder coating installation Expired - Lifetime US3918641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1517774A CH593717A5 (pl) 1974-11-14 1974-11-14

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BE (1) BE835550A (pl)
CH (1) CH593717A5 (pl)
ZA (1) ZA756901B (pl)

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153008A (en) * 1977-04-07 1979-05-08 Interrad Corporation Moving filter system for air-powder separation in an electrostatic powder spray system
US4181093A (en) * 1978-04-06 1980-01-01 George Koch Sons, Inc. Spraying system with improved exhaust
JPS5546600U (pl) * 1978-09-21 1980-03-26
US4230068A (en) * 1977-06-13 1980-10-28 Onoda Cement Company, Ltd. Apparatus used in continuous process for electrostatic coating with pulverized material
US4294191A (en) * 1978-12-06 1981-10-13 Loeoef Ingemar Spray booth
DE2926040C2 (de) * 1979-06-28 1982-07-15 Ernst St.Gallen Lehmann Sprühbeschichtungskabine für pulverförmiges bis körniges Beschichtungsmaterial
US4430956A (en) * 1982-06-01 1984-02-14 George Koch Sons, Inc. Spray booth with undeposited coating material collection system
US4852513A (en) * 1988-03-25 1989-08-01 Ransburg Corporation Powder recovery system
US4901666A (en) * 1987-06-24 1990-02-20 Onoda Cement Company, Ltd. Electrostatic powder coating device
US5171368A (en) * 1991-07-02 1992-12-15 Russell Mazakas Filter belt assembly for a powder spray booth
US5199989A (en) * 1991-07-31 1993-04-06 Ransburg Corporation Powder booth floor wiping mechanism
US5259879A (en) * 1991-06-27 1993-11-09 Ransburg Corporation Powder application booth liner and method of making it
US5346553A (en) * 1989-06-16 1994-09-13 Farb-Tec Gesellschaft Fur Beschichtungskabinen Cabin for spray-coating workpieces with material in powder form
US5494517A (en) * 1992-07-15 1996-02-27 Michael Eder Device for supporting or transporting objects to be treated with spray having means for collecting and removing excess spray
US5743958A (en) * 1993-05-25 1998-04-28 Nordson Corporation Vehicle powder coating system
US20020078883A1 (en) * 2000-10-05 2002-06-27 Shutic Jeffrey R. Quick change powder coating spray system
US6461431B1 (en) 1997-09-05 2002-10-08 Nordson Corporation Relating to powder spray coating
US6510788B1 (en) * 2000-05-26 2003-01-28 Perma Press Ab Device and method for application of coating powder
US20030127047A1 (en) * 2000-03-31 2003-07-10 James Ainsworth Powder coating systems
US20040074987A1 (en) * 2001-01-31 2004-04-22 Shutic Jeffrey R. Apparatus and method for automatic powder spray booth cleaning
US20040137144A1 (en) * 1993-05-25 2004-07-15 Shutic Jeffrey R. Vehicle powder coating system
US20040147884A1 (en) * 2003-01-24 2004-07-29 Lester Szurko Overspray collection booth
US20050178851A1 (en) * 2001-06-25 2005-08-18 Nordson Corporation Quick change powder coating spray system
EP1586362A2 (en) * 2004-04-08 2005-10-19 Bergi S.p.A. Spraying machine for tannery hides
DE102004039646A1 (de) * 2004-08-14 2006-02-23 Itw Gema Ag Pulverfördervorrichtung, insbesondere für Beschichtungspulver
US20060137680A1 (en) * 2002-08-23 2006-06-29 Vladimir Sheiman Nebulizing and drug delivery device
US7074274B1 (en) 1999-09-17 2006-07-11 Nordson Corporation Quick color change powder coating system
US20060201502A1 (en) * 2005-03-09 2006-09-14 Ric Investments, Llc. Nebulizing drug delivery device with increased flow rate
US20060201500A1 (en) * 2005-03-09 2006-09-14 Ric Investments, Llc. Nebulizing drug delivery device for ventilator
US20060243274A1 (en) * 2005-03-09 2006-11-02 Ric Investments, Llc Nebulizing drug delivery device with barrier
EP1952892A1 (de) 2007-02-02 2008-08-06 ITW Gema GmbH Pulversprühbeschichtungsanlage und Pulversprühbeschichtungsverfahren
DE102007005310A1 (de) 2007-02-02 2008-08-07 Itw Gema Ag Beschichtungspulver-Filtervorrichtung
DE102007005306A1 (de) 2007-02-02 2008-08-07 Itw Gema Ag Pulverzufuhrvorrichtung von einer Pulversprühbeschichtungsanlage
DE102007005312A1 (de) 2007-02-02 2008-08-07 Itw Gema Ag Pulverrückgewinnungsvorrichtung für eine Pulversprühbeschichtungsanlage
DE102007005313A1 (de) 2007-02-02 2008-08-07 Itw Gema Ag Beschichtungspulver-Fördervorrichtung
US20080190359A1 (en) * 2007-02-13 2008-08-14 Itw Gema Ag Powder feeding device for spray coating powder
US20090200397A1 (en) * 2005-05-23 2009-08-13 Vladimir Lvovich Sheiman Apparatus for atomisation and liquid filtration
US7631643B2 (en) 2005-03-09 2009-12-15 Ric Investments, Llc Nebulizing drug delivery device with interlock detection and temperature protection
US20100313883A1 (en) * 2006-04-20 2010-12-16 Koninklijke Philips Electronics N.V. Ultrasonic bebulilzer with metal coated ultrasonic genrator

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US3691991A (en) * 1968-04-26 1972-09-19 Atlas Copco Ab Apparatus for spray-coating components
US3724755A (en) * 1971-09-27 1973-04-03 Allis Chalmers Powder-air venturi for electrostatic spray coating system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691991A (en) * 1968-04-26 1972-09-19 Atlas Copco Ab Apparatus for spray-coating components
US3724755A (en) * 1971-09-27 1973-04-03 Allis Chalmers Powder-air venturi for electrostatic spray coating system

Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153008A (en) * 1977-04-07 1979-05-08 Interrad Corporation Moving filter system for air-powder separation in an electrostatic powder spray system
US4230068A (en) * 1977-06-13 1980-10-28 Onoda Cement Company, Ltd. Apparatus used in continuous process for electrostatic coating with pulverized material
US4181093A (en) * 1978-04-06 1980-01-01 George Koch Sons, Inc. Spraying system with improved exhaust
JPS5546600U (pl) * 1978-09-21 1980-03-26
US4257345A (en) * 1978-09-21 1981-03-24 Westinghouse Electric Corp. Electrostatic powder coating installation
US4294191A (en) * 1978-12-06 1981-10-13 Loeoef Ingemar Spray booth
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BE835550A (fr) 1976-05-13
CH593717A5 (pl) 1977-12-15
ZA756901B (en) 1977-06-29

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