US2247963A - Apparatus for spray coating articles - Google Patents

Apparatus for spray coating articles Download PDF

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Publication number
US2247963A
US2247963A US281766A US28176639A US2247963A US 2247963 A US2247963 A US 2247963A US 281766 A US281766 A US 281766A US 28176639 A US28176639 A US 28176639A US 2247963 A US2247963 A US 2247963A
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US
United States
Prior art keywords
articles
spray
cabinet
electrode
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US281766A
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English (en)
Inventor
Harold P Ransburg
Harry J Green
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harper J Ransburg Co Inc
Original Assignee
Harper J Ransburg Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harper J Ransburg Co Inc filed Critical Harper J Ransburg Co Inc
Priority to US281766A priority Critical patent/US2247963A/en
Priority to US308024A priority patent/US2334648A/en
Application granted granted Critical
Publication of US2247963A publication Critical patent/US2247963A/en
Priority to FR920203D priority patent/FR920203A/fr
Priority to BE462200D priority patent/BE462200A/xx
Priority to NL123170A priority patent/NL62903C/xx
Priority to GB18704/47A priority patent/GB644593A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B05B14/42—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using electrostatic means
    • 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
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • 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
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • B05B5/084—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects the objects lying on, or being supported above conveying means, e.g. conveyor belts
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/07—Hoods
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/45—Molding using an electrical force
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/72—Processes of molding by spraying
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/121—Projection

Definitions

  • spray particles do not behave in the manner to be expected from the application of this theory. Even though the gun itself is the discharge electrode and all particles of the spray may then be expected to be electrically charged, still the spray particles apparently move toward a positively charged electrode as readily as toward a negative one, other things being equal.
  • the walls of the cabinet even when charged at the same potential as the gun, have substantially the same attractive effect as when charged at the opposite potential. In cases where the discharge electrode is placed in the path of the spray said electrode apparently acts as a collector of spray particles.
  • One object ot the present invention is generally to increase the efficiency of spray coating methods and apparatus of the type described and particularly to reduce the amount of coating material lost by deposition on the walls of the cabinet and on' the discharge electrode.
  • This object is attained in part, first, by substituting a cabinet formed completely of insulating material for the metallic cabinet heretofore used; second, by placing the discharge electrode as completely as possible out of the path of the spray from the gun; and third, by suitably proportioning the sizes of the discharge and collecting electrodes.
  • the behavior of the particles indicates that it is unnecessary to give them an initial charge by contact or proximity to an electrode charged in the opposite potential to the collecting electrode. Hence particles discharged into an electrostatic ileld are attracted to either electrode. Other things being equal, the attractive effect of a positively charged electrode is considerably greater than that of a negatively charged electrode but the attractive4 eiect of any electrode increases enormous with an increase in the size of electrode. These facts have made it possible to increase .the 'eiilciency of the apparatus by placing the dischargev electrode out of the path of spray particles and by making the discharge electrode relatively small and the collecting electrode relatively large. For the coating of small objects the discharge electrode may be in the form of a ⁇ point, while for a succession of articles moving on a conveyor the discharge electrode is preferably in the form of a fine Wire or a series of points arranged parallel to the direction of travel.
  • Another object of the invention is to provide efficient means for coating articles having a surface area too small to comprise an eiicient collecting electrode.
  • This objectv is attained by grouping a plurality of such articles in such way as to cause all members of the group to be presented simultaneously to the discharge electrode in such manner'that their aggregate area is much greater than that of the discharge electrode.
  • Another object ot the invention is to coordinate the velocity and direction of the spray with the strength of the electric field and the position of the article to be coated in such manner that as little as possible of the spray fails to reach the articles.
  • particles of varying sizes are created and these particles lose their initial velocities at various distances from the gun, depending upon their size.
  • many of the larger particles reach the region of the article to be coated with such a high velocity remaining that they cannot be pulled in by electrostatic attraction and are carried past the article.
  • Small particlesfon the other hand lose their velocities before they can approach close enough to the articles to be attracted electrostatically.
  • a series of articles to be coated is moved in a predetermined path adjacent to the spray gun.
  • the gun is directed roughly parallel to the path or inclined at an acute angle to the path so that the articles successively pass close to the points at which the initial velocities of the particles of varying sizes are lost.
  • Another object of the invention is to minimize the hazard of explosion in electrostatic spray painting with materials having inflammable solvents.
  • Another object of the invention is to provide an efficient method and apparatus for electrostatic spray painting of articles formed of nonconducting materials.
  • Fig. l is a plan View of a spray painting apparatus constructedl in accordance with a preferred form of 'the invention and having the cabinet shown in section.
  • Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1.
  • Fig. 3 is a plan view of conveyor apparatus used with the 'invention and is taken substantially on the line 3-3 of Fig. 2.
  • Fig. 4 is an elevational sectional view taken on the line 4-4 of Fig. 3.
  • Fig. 5 is a plan view of a detail of the apparatus of Figs. 3 and 4.
  • Fig. 6 is an elevational view of the same partly in section.
  • Fig. 'I is an end elevational view showing an adaptation of the invention to the coating of a diierent type of object.
  • a cabinet i8 consisting of side walls I l, top i2 and Iloor plates I3, all supported by Vverticall posts i4.
  • the cabinet including the vertical posts i4, is preferably constructed entirely of electrically nonconducting materials such as wood or Bakelite or other suitable plastics. Attention is called particularly to the use of non-conducting mate rial for the supporting posts I4. Even though an insulated cabinet is used, if the supporting posts are of metal, an appreciabledepositof coating material is found on the inner wall of the cabinet in the region of the supporting posts. As will be apparent from the drawings, the cabinet is completely open to the atmosphere at both ends.
  • a conveyor chain vI5 supported on a trackway formed by an angle iron I6, an angle iron Il and a plate Il (Fig. 4). Said trackway is suitably supported bylegs i9.
  • the conveyor chain is trained about sprockets 20 and may be continuously driven by a motor 2
  • the path of the conveyor chain is best seen in Fig. 1 and leads from beneath the cabinet past an unloading station 25 and a loading station 26 and then again beneath the cabinet.
  • Each of said carrier units includes a sleeve 29 preferably formed of insulating material and having in its lower end a plug 30 provided with an opening to receive the pin 2l.
  • is mounted near the lower end of the sleeve 29.
  • a plug 32 is secured in the upper end of the sleeve 29 and is provided with a recess adapted to receive an upwardly extending rod 33.
  • a collar 34 tightly secured about the upper end of the sleeve 28 prevents undesired displacement of the plug 32.
  • the rod 33 extends upwardly through an opening between the two bottom plates i3 of the cabinet and carries at its upper end an electrical terminal in the form of an electrode 35 herein shown as of frusto-conical shape formed of sheet metal and serving as a support for an article 36 to be coated.
  • the article is in the form of a flowerpot and may be of non-conducting material, such as ceramic ware.
  • each end of the cabinet close to the floor there are mounted a pair of rods 3l suitably supported in fittings 33 and each having mounted thereon one or more slidable fittings 39.
  • Said ttings 39 may be secured at any desired place along the rods 31 by means of thumb screws 4U and each of said fittings is adapted to receive a vertical rod 4
  • Fittings 42 are carried by the vertical rods 4I and are similar to the fittings I3.
  • Said fittings 42 carry horizontal rods 43 adapted to support spray guns 44.
  • Said spray guns may be of a well known commercial form and are connected by tubing 45 to a suitable source of a coating material such as paint, lacquer or enamel and a source of compressed air for atomization.
  • the spray guns may be positioned as desired adjacent either end of the cabinet.
  • two such guns are used at one end 'of the cabinet and are located to direct a spray 4l of coating material in the general direction of the opposite end of the cabinet.
  • One of said guns is positioned on each side of the path of movement of the articles 3i through the cabinet.
  • Preferably all or a part of the supporting structure Ior the guns is formed of insulating material and the tubing 45 is also of non-conducting material. The guns are, therefore, isolated from the electrical apparatus and do not impart any electrical charge to the spray particles nor tend to attract stray particles of the coating material.
  • each of the side walls of the cabinet there is mounted a pair of tubular insulating members 41 extending inwardly toward the path of travel of the articles 36.
  • An electrode 48 in the form of a iine wire is strung between the inner ends of each of the insulators 41 and extends generally parallel to the path of travel of the articles.
  • Each of said electrodes extends outwardly through one or both of the insulators 4l and is connected by a conductor 48 to one terminal of an electrical generating apparatus 50 shown diagrammatically in Fig. 2.
  • the opposite terminal of said .apparatus is connected by a conductor 5
  • the wires 52 are adapted to engage the vertical rods 3,3 in their travel I through the cabinet and thus serve to make an electrical connection between the generating apparatus 50 and each of the electrodes 35.
  • the generating apparatus is adapted to supply direct currentwith a voltage of the order of 100,000 volts.
  • the path of the spray and the path of the articles 36 is such that both small and large spray particles lose their initial velocities at points adjacent to the path of travel of the article'.
  • the efficiency of the paint collection is, therefore, enormous increased over that of any arrangement in which the spray is directed substantially at right angles to the path of travel of the articles.
  • the velocity of spray is normally adjusted so that none of the spray particles pass beyond the confines of the cabinet. It is immaterial in which end of the cabinet the spray guns are mounted. In fact, one may be mounted in one end and the other in the opposite end. Such an arrangement is beneficial in certain installations. Where only one side of each article is to be coated only one gun and one discharge electrode may be required. In other cases, such as for larger objects, more than one gun may be required on each side of the conveyor.
  • the articles to be coated need not be electrical conductors. When said articles are so placed as to mask the collecting electrode so that the electrostatic eld must pass through the article, the efllciency of the collecting electrode is not materially impaired. Paint which is attracted by the collecting electrode is then deposited on the outer surface of the article It is not necessary in all cases that the collecting electrodes be carried by the conveyor and act as supports for the articles. Where only one side of an article is to be coated it may be advantageous in some cases to mount a collecting electrode in a stationary position on the side of the conveyor opposite to the discharge electrode. Such an arrangement is illustrated in Fig. 'l in which an object
  • Said object is carried by a support
  • the discharge electrode may be in the form of a metallic point
  • the collecting electrode is shown as a plate
  • the spray gun 44 discharges the paint spray into the space between the discharge electrode and the object. In apparatus of this kind it is advantageous to move the conveyor intermittently, stopping each of the objects
  • a terminal associated with said article is intended to include an electrode such as those specifically illustrated for use with non-conducting articles or an electrically conducting element to which a conducting article which is itself the collecting electrode may be connected.
  • the member 35 of Fig. 4 may or may not serve as the collecting electrode, depending upon whether non-conducting or conducting articles are tobe coated, but in either case it is a terminal associated with the article.
  • is provided with a suitable opening in which there is inserted a pin 68, the lower end of which is received in an opening in the adjacent link of the chain l5. The pin, therefore, prevents the articles from turning during their travel through the cabinet.
  • a sprocket chain 64 is trained about a pair of sprockets 65 and 66 carried by said stub shafts. The chain 64 is of the proper pitch to mesh with the sprockets 3
  • a plate 61 rests on brackets 88 and a bracket 69 secured to the plate I8.
  • edges of said plate 61 engage the inner and outer runs of the chain 84 which is preferably a roller chain adapted to run smoothly on said edges.
  • the chain Il may be brought into and out of mesh with the sprockets Il.
  • the plate 61 has secured thereto a vertical pin Il extending downwardly through a slotted opening 1
  • a stud 13 is threaded in the outlet of said T-fitting and is connected to a rod 14 by a pipe union 1l. Said union is loosely adjusted so that the rod 14 may be rotated without rotating the stud 13 and the threaded connection 1i therein is soldered to prevent the union becoming unscrewed in its movement.
  • the outer end of the rod 14 is guided in a bracket 11 secured to the bracket 69.
  • a washer 18 is carried by the rod 14 and is held in place thereon by a pin 1l.
  • a compression spring Il is interposed between said washer and the bracket 11 and normally urges the rod 14 and associated parts to the left in Fig. 4 to keep the chain I4 in engagement with sprockets 3
  • the yielding pressure of the spring permits the chain to give slightly if the teeth of the sprockets do not initially engage the chain at the proper point.
  • the outer end oi the. rod 14 is provided with a T-fitting Il, in one run of which there is secured a downwardly extending handle 82 and the other of which carries a stud I3.
  • a detent N is secured to a portion of the cabinet in position to engage the stud 83.
  • a guide pin 85 secured to the bracket 6! operates in a slotted opening in the plate 61 and serves to guide the movement of the same.
  • the spring 80 normally presses the plate l1 against the inner run of the chain N and holds said chain in engagement with the sprockets 3i.
  • the rod 1Q may be rotated so that the stud 83 clears the detent 8l, the rod may then he drawn to the right in Fig. 4 and the stud t3 lreturned to its vertical position outside of the detentu. this movement the plate 61 is moved to the right Irl.
  • conveyor means adapted to move a series of articles to be coated in a predetermined path, a series of receiving electrodes movable with said articles, each of said electrodes being associated with one of said articles, a discharge electrode spaced from the path of movement of said articles and positioned so that at least a portion of each of said articles intervenes between said discharge electrode and the associated receiving electrode, electrical means producing a high potential difference between said discharge electrode and said receiving electrodes, and means for spraying a coating material into the space of electric potential having opposite terminals in Fig.
  • a conveyor carrying a plurality of spaced articles moving successivel; in a predetermined path, a terminal associated with said articles, a discharge electrode spaced from the path of travel of said articles, a source of high potential connected with said terminal and electrode respectively and creating in the atmosphere therebetween an electrostatic field, and a spray gun adapted to discharge a spray of coating material into said field, the axis of said spray being inclined at an acute angle to the direction oi' movement of the articles such that the initial velocities of particles of different sizes are lost adjacent to said path, and said electrode and terminal being so placed that said electrostatic field includes substantially the whole of the path of said spray, whereby spray particles varying in size and velocity are collected on said articles by electrostatic action.
  • a conveyor carrying a plurality of spaced articles moving successively in a predetermined path, a discharge electrode in the form of a relatively fine wire arranged generally parallel to the path of said articles and spaced therefrom, al source of high potential connected with said terminal and electrode respectively n and creating in the atmosphere therebetween an

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US281766A 1939-06-29 1939-06-29 Apparatus for spray coating articles Expired - Lifetime US2247963A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US281766A US2247963A (en) 1939-06-29 1939-06-29 Apparatus for spray coating articles
US308024A US2334648A (en) 1939-06-29 1939-12-07 Method of spray-coating articles
FR920203D FR920203A (fr) 1939-06-29 1945-12-29 Appareil pour recouvrir des objets au moyen d'un jet de liquide pulvérisé
BE462200D BE462200A (enrdf_load_stackoverflow) 1939-06-29 1946-01-04
NL123170A NL62903C (enrdf_load_stackoverflow) 1939-06-29 1946-01-25
GB18704/47A GB644593A (en) 1939-06-29 1947-07-14 Method and apparatus for spray-coating articles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US281766A US2247963A (en) 1939-06-29 1939-06-29 Apparatus for spray coating articles
US308024A US2334648A (en) 1939-06-29 1939-12-07 Method of spray-coating articles

Publications (1)

Publication Number Publication Date
US2247963A true US2247963A (en) 1941-07-01

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Application Number Title Priority Date Filing Date
US281766A Expired - Lifetime US2247963A (en) 1939-06-29 1939-06-29 Apparatus for spray coating articles
US308024A Expired - Lifetime US2334648A (en) 1939-06-29 1939-12-07 Method of spray-coating articles

Family Applications After (1)

Application Number Title Priority Date Filing Date
US308024A Expired - Lifetime US2334648A (en) 1939-06-29 1939-12-07 Method of spray-coating articles

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US (2) US2247963A (enrdf_load_stackoverflow)
BE (1) BE462200A (enrdf_load_stackoverflow)
FR (1) FR920203A (enrdf_load_stackoverflow)
GB (1) GB644593A (enrdf_load_stackoverflow)
NL (1) NL62903C (enrdf_load_stackoverflow)

Cited By (56)

* Cited by examiner, † Cited by third party
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US2421787A (en) * 1945-01-26 1947-06-10 Harper J Ransburg Company Electrostatic coating method
US2426016A (en) * 1941-11-29 1947-08-19 Westinghouse Electric Corp Electrostatic coating apparatus
US2428991A (en) * 1944-01-22 1947-10-14 Harper J Ransburg Company Apparatus for spray coating articles
US2435931A (en) * 1940-04-06 1948-02-10 Howard V Schweitzer Glazing apparatus
US2442986A (en) * 1945-01-26 1948-06-08 ransburg
US2444144A (en) * 1944-06-16 1948-06-29 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2446953A (en) * 1945-02-03 1948-08-10 Ransburg Electro Coating Corp Apparatus for electrostatically coating articles
US2447664A (en) * 1945-02-01 1948-08-24 Westinghouse Elec Elevator Co Electrostatic coating apparatus and method
US2456795A (en) * 1945-10-06 1948-12-21 Reeves Hoffman Corp Cathode sputtering apparatus for coating oscillator plates
US2463422A (en) * 1945-02-03 1949-03-01 Ransburg Electro Coating Corp Method and apparatus for coating articles by electrostatic deposition
US2465128A (en) * 1945-10-31 1949-03-22 Rausburg Electro Coating Corp Method and apparatus for electrostatic coating
US2476145A (en) * 1944-08-12 1949-07-12 Libbey Owens Ford Glass Co Protection of surfaces
US2509277A (en) * 1945-04-06 1950-05-30 Ransburg Electro Coating Corp Control of electrostatic fields
US2509276A (en) * 1944-06-28 1950-05-30 Ransburg Electro Coating Corp Apparatus for electrostatically depositing adherent coating materials
US2526763A (en) * 1946-05-20 1950-10-24 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2526780A (en) * 1945-10-22 1950-10-24 Ransburg Electro Coating Corp Apparatus for coating articles
US2531542A (en) * 1945-12-03 1950-11-28 Ransburg Electro Coating Corp Spray coating electrode structure
US2544806A (en) * 1945-11-19 1951-03-13 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2546701A (en) * 1945-05-31 1951-03-27 Ransburg Electro Cating Corp Apparatus for spray coating articles in an electrostatic field
US2550657A (en) * 1945-12-28 1951-04-24 Ransburg Electro Coating Corp Electrostatic coating method and apparatus
US2553724A (en) * 1946-03-16 1951-05-22 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2559225A (en) * 1946-09-07 1951-07-03 Ransburg Electro Coating Corp Electrostatic coating method and apparatus
US2567781A (en) * 1945-04-23 1951-09-11 Ransburg Electro Coating Corp Method for coating articles
US2568611A (en) * 1949-07-16 1951-09-18 Ransburg Electro Coating Corp Coating method and apparatus
US2598466A (en) * 1948-07-13 1952-05-27 Gen Motors Corp Electrostatic spray painting method and apparatus
US2626589A (en) * 1948-12-01 1953-01-27 Gen Motors Corp Electrostatic spray painting apparatus
US2632716A (en) * 1945-09-29 1953-03-24 Ransburg Electro Coating Corp Method of coating articles
US2636471A (en) * 1946-10-10 1953-04-28 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2640459A (en) * 1945-10-22 1953-06-02 Ransburg Electro Coating Corp Electrostatic detearing apparatus
US2650329A (en) * 1947-12-13 1953-08-25 Ransburg Electro Coating Corp Control apparatus
US2655128A (en) * 1946-03-16 1953-10-13 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2657339A (en) * 1953-10-27 Method and apparatus for producing
US2684656A (en) * 1949-07-30 1954-07-27 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2722908A (en) * 1954-04-20 1955-11-08 Gen Motors Corp Electrostatic spray painting apparatus
US2729191A (en) * 1950-07-15 1956-01-03 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2730460A (en) * 1949-09-28 1956-01-10 Ransburg Electro Coating Corp Electrostatic method and apparatus
US2730988A (en) * 1950-06-10 1956-01-17 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2758535A (en) * 1952-06-26 1956-08-14 Research Corp Electrical precipitation apparatus
DE951499C (de) * 1949-03-25 1956-10-31 Gen Motors Corp Verfahren und Vorrichtung zur elektrostatischen Spritzlackierung
US2777784A (en) * 1951-11-27 1957-01-15 Ransburg Electro Coating Corp Method and apparatus for spray coating of articles
US2794751A (en) * 1953-11-12 1957-06-04 Ransburg Electro Coating Corp Electrostatic depositing method
US2806803A (en) * 1952-07-11 1957-09-17 Rubberset Company Method of making painting roller
DE973950C (de) * 1951-02-11 1960-07-28 Metallgesellschaft Ag Anordnung von Isolierflaechen bei Einrichtungen zum Spritzlackieren, Faerben oder Raeuchern von Gegenstaenden im elektrostatischen Feld
DE975380C (de) * 1948-03-05 1961-11-16 Harper J Ransburg Company Verfahren und Vorrichtung zum gleichmaessigen UEberziehen von Gegenstaenden mit Hilfe eines elektrostatischen Feldes
DE1156342B (de) * 1951-11-13 1963-10-24 Harper J Ransburg Company Elektrostatische Fluessigkeitsauftragvorrichtung
US4120261A (en) * 1977-11-25 1978-10-17 Caterpillar Tractor Co. Electrostatic coating system
WO1979000267A1 (en) * 1977-11-09 1979-05-17 Caterpillar Tractor Co Electrostatic coating system
EP0055536A3 (en) * 1980-12-29 1982-08-04 Allied Tube & Conduit Corporation Apparatus for continuously electrostatically coating an elongated object
US4538542A (en) * 1984-07-16 1985-09-03 Nordson Corporation System for spray coating substrates
EP0115321A3 (en) * 1983-01-27 1985-10-16 Nordson Corporation Improved powder spray booth and powder recovery system
US4635585A (en) * 1985-10-15 1987-01-13 Nordson Corporation System for spray coating substrates
US5192369A (en) * 1986-11-20 1993-03-09 British Technology Group Ltd. Apparatus for spraying harvested crops
US5698269A (en) * 1995-12-20 1997-12-16 Ppg Industries, Inc. Electrostatic deposition of charged coating particles onto a dielectric substrate
US5830274A (en) * 1995-12-20 1998-11-03 Ppg Industries, Inc. Electrostatic deposition of charged coating particles onto a dielectric substrate
CN109465124A (zh) * 2018-12-28 2019-03-15 中南林业科技大学 纤维板静电喷涂设备
CN114522839A (zh) * 2022-01-20 2022-05-24 厦门美美餐具工业有限公司 一种木制家具喷涂装置

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US2730460A (en) * 1949-09-28 1956-01-10 Ransburg Electro Coating Corp Electrostatic method and apparatus
US2730988A (en) * 1950-06-10 1956-01-17 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2729191A (en) * 1950-07-15 1956-01-03 Ransburg Electro Coating Corp Electrostatic coating apparatus
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DE1156342B (de) * 1951-11-13 1963-10-24 Harper J Ransburg Company Elektrostatische Fluessigkeitsauftragvorrichtung
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US2758535A (en) * 1952-06-26 1956-08-14 Research Corp Electrical precipitation apparatus
US2806803A (en) * 1952-07-11 1957-09-17 Rubberset Company Method of making painting roller
US2794751A (en) * 1953-11-12 1957-06-04 Ransburg Electro Coating Corp Electrostatic depositing method
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US4158344A (en) * 1977-11-09 1979-06-19 Caterpillar Tractor Co. Electrostatic coating system
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EP0055536A3 (en) * 1980-12-29 1982-08-04 Allied Tube & Conduit Corporation Apparatus for continuously electrostatically coating an elongated object
US4344381A (en) * 1980-12-29 1982-08-17 Allied Tube & Conduit Corporation Apparatus for continuously electrostatically coating an elongated object
EP0115321A3 (en) * 1983-01-27 1985-10-16 Nordson Corporation Improved powder spray booth and powder recovery system
US4538542A (en) * 1984-07-16 1985-09-03 Nordson Corporation System for spray coating substrates
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US5192369A (en) * 1986-11-20 1993-03-09 British Technology Group Ltd. Apparatus for spraying harvested crops
US5698269A (en) * 1995-12-20 1997-12-16 Ppg Industries, Inc. Electrostatic deposition of charged coating particles onto a dielectric substrate
US5830274A (en) * 1995-12-20 1998-11-03 Ppg Industries, Inc. Electrostatic deposition of charged coating particles onto a dielectric substrate
CN109465124A (zh) * 2018-12-28 2019-03-15 中南林业科技大学 纤维板静电喷涂设备
CN114522839A (zh) * 2022-01-20 2022-05-24 厦门美美餐具工业有限公司 一种木制家具喷涂装置

Also Published As

Publication number Publication date
NL62903C (enrdf_load_stackoverflow) 1949-03-16
FR920203A (fr) 1947-04-01
BE462200A (enrdf_load_stackoverflow) 1946-02-28
GB644593A (en) 1950-10-11
US2334648A (en) 1943-11-16

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