US2442986A - ransburg - Google Patents

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Publication number
US2442986A
US2442986A US57472145A US2442986A US 2442986 A US2442986 A US 2442986A US 57472145 A US57472145 A US 57472145A US 2442986 A US2442986 A US 2442986A
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United States
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articles
field
article
coating
particles
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Priority to BE462454D priority Critical patent/BE462454A/xx
Priority to NL65859D priority patent/NL65859C/xx
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Priority to US57472145 priority patent/US2442986A/en
Priority to FR919751D priority patent/FR919751A/fr
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Publication of US2442986A publication Critical patent/US2442986A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0235—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being a combination of rotation and linear displacement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0264—Overhead conveying means, i.e. the object or other work being suspended from the conveying means; Details thereof, e.g. hanging hooks
    • 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
    • B05B5/087—Arrangements of electrodes, e.g. of charging, shielding, collecting electrodes
    • 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
    • Y10S264/46—Molding using an electrical heat

Definitions

  • This invention relates to a new and novel method and apparatus for directing atomized coating material to articles which are to be finished with a protective or decorative coating, and in particular wherein the deposition of the material is accomplished wholly or in part through the medium of an electrostatic field as described in Letters Patent No. 2,334,648, granted November 16, 1943, for "Method of spray coating articles.
  • the coating material having been atomized by relatively high pressures, travels at quite high velocities only a very short distance from the atomizing or spray gun before encountering the article onto which it is blasted by the direct action of the atomizing air. Only part of the material leaving the gun is applied to the article by this method. The remainder is blown past the article into a collecting water curtain or spray booth and is unused material.
  • the electrostatic spray method employs principles which are quite in contrast to those of the high pressure method.
  • the material must first find itself in the field which exists between the discharge electrode and the item. Introducing the material into this field and retaining it therein sufiiciently long for the relatively weak forces of the field to bring about the precipitation has been one of the chief problems of this method.
  • Prior to this invention it has been the practice to position the atomizing agent in such a way that its atomizing air blast constituted the sole source of positioning the particles in the electrostatic field.
  • the purpose of the present invention to disclose a method and apparatus by which the dispersed coating particles may be more eifectively and consistently controlled for and prior to their electrostatic deposition.
  • the gas stream By the introduction of a gas stream which is completely independent of the atomizing and dispersing agent, the gas stream is caused to absorb the energy the particles acquire during atomization and dispersion and to correct their momentum so that they will travel and remain suspended in the precipitating field for a sufiiciently long time for their deposition to be effected, even though this energy and momentum might alone have been sufiicient to carry the particles into the field.
  • the initial velocities which the particles inherently acquire from the atomizing action may be effectually integrated to bring them into a condition of velocity equilibrium with the gas stream in the electrostatic field,
  • such auxiliary gas stream causes the coating material in suspension to be carried along, and preferably counter to, the path of travel of the articles and in a direction perpendicular to that of the lines of force generated in the electrostatic field.
  • Fig. 1 is a perspective view of one form of apparatus with parts broken away and removed.
  • Fig. 2 is a schematic plan of the invention shown in Fig. 1.
  • Fig. 3 is a, schematic plan showing a modification of the invention.
  • a spray booth comprising an elongated compartment ID for housing and confining the coating zone or space through which the electrostatic coating action takes place.
  • a discharge electrode carried by the insulated supports II from which the electrode frame l2 depends, which frame supports a series of equally spaced fine electrode wires l3 connected through the lead-in conductor M with one terminal of a source of high voltage IS.
  • the discharge electrode may comprise a pair of frames l2 spaced from each other and having their electrode wires connected by a connecting lead IS.
  • the opposed electrode frames are so spaced as to permit the articles to be coated to pass between and in a path spaced dErom each of them somewhat greater than the distance of the relative spacing of the electrode wires IS.
  • the articles I! to be coated are supported in a column and in spaced relation to each other by an overhead conveyor track l8 through the medium of the hanger rods l0. They are moved along a path extending substantially centrally of the spray booth and discharge electrode by a conveyor chain 20.
  • the conveyor system is grounded and through ground is connected with the other terminal of the high voltage source l5.
  • the articles which are electrically connected through their hangers to the conveyor system are similarly grounded so as to comprise a collecting electrode of the circuit, said electrode being maintained in spaced relation to the discharge electrode wires l3.
  • Such articles as are shown herein are preferably rotated during their passage through the coating zone to present their entire cylindrical surface to the discharge electrode. Said rotation is caused by engagement of the friction rollers 2
  • the coating material such as paint or lacquer
  • the coating material is introduced into the electrostatic field, preferably in the form of finely divided particles emanating from the atomizing spray guns 23.
  • One'or' more spray guns are mounted upon a support 24 and connected through the usual flexible hose with a source of compressed air to provide atomization, as well as with the source of material, in the usual manner. They are adjusted to discharge their spray into the field and substantially toward the articles to be coated.
  • the articles are caused to continuously travel through the coating zone along a path longitudinally thereof in a direction usually toward the spray guns so that the heavier particles of coating material having the greatest momentum are carried for either impact or electrostatic deposition upon the rearmost articles as they pass into said zone, the finer particles of less momentum being similarly deposited to further coat the articles as they approach the spray guns.
  • the particles lose their momentum and drop below the coating zone or float away and escape through turbulence or otherwise into a region outside of the effective action of the field and beyond the coating zone, such as the space indicated at 25 between the discharge electrodes and the walls of the booth.
  • a carrier gas current is directed through the field along the path of movement of the articles therethrough.
  • the carrier gas may be drawn therethrough by a blower 2G electrically driven by a suitable power source, not shown, said blower being positioned at the end of the spray booth remote from the guns. 4
  • inwardly curved ducts 21, 28 extending in close proximity to the path of travel of the articles, and so arranged as to direct the incoming gas, drawn ⁇ through the cabinet by the blower, toward said articles and the electrostatic field, so that the greater portion of the current of gas will be concentrated in a stream passing therethrough 1ongitudinally thereof and along the path of travel of the articles.
  • the articles are conveyed into the booth from one side thereof through a restricted tunnel 29 to minimize the amount oi gas bypassed therethrough by the blower.
  • the gas current so developed assists and augments the atomlzing agent in that it acts as a carrier for the fine particles of the material which have been atomized somewhat in the form of a mist. Additionally, the current of this gas stream smooths out any turbulence and billowing of the spray to prevent particles from being thrown outside of the effective field or coating zone.
  • This gas current also permits of the use of low pressure spray guns which is desirable in electrostatic deposition, by reason of its picking up and carrying the particles along with it lengthwise of the field and in line of travel of the articles. The smaller mist-like particles of the material will, therefore.
  • a series of air distributing grills or baflles 30 are arranged between the blower duct 3! and the adjacent end of the spray cabinet.
  • the aggregate eflect of the forces resulting from the spray ms and the carrying gas stream is such as to insure the slow floating oi the particles along the path of travel of the articles without turbulence and in a direction perpendicular to the direction of the lines of force created by the field.
  • This has the effect of minimizing the otherwise misdirection of many of the coating particles, such as to find themselves outside of the effective field, and causes said particles to be regimented into position for the efficient electrostatic deposition thereof. It is particularly important since the electrostatic forces are perpendicular to the movement of the particles of material introduced into the field, that the particles remain in the field, for a substantial time so that the action of the electrostatic forces will eventually cause their precipitation onto the articles.
  • This is materially assisted and controlled by the auxiliary carrier stream acting to regiment and control the motion of the particles over this required longer period of time, confining them to the field and in efi'ective relation to the oncoming articles.
  • Fig. 3 there is shown a modification of the above, wherein the articles 1 are of a peculiar form. requiring a somewhat difierent treatment than as above described.
  • the article to be coated has certain electrically shielded portions into which the electrical field alone will not "throw" sufllcient coating material, it is desirable to utilize the impact force of the spray guns to so direct the spray of coating material as to reach such shielded portions.
  • the baflies I21, I28 are arranged to direct the carrier gas stream first in direct opposition to the spray and thence along the path of travel of the articles through the electrostatic field.
  • the impact of the gas stream will carry the normally lost particles of the material back toward the articles and will retain them in suspension as they are thereby carried into and through the electrostatic field for electrostatic deposition.
  • Apparatus for coating articles including means for conveying an article to be coated along a predetermined path through a spray zone, a discharge electrode mounted in said zone in spaced relation to the article and extending along its path of travel, a source of high voltage electrically associated with said article and electrode to provide a field of high potential difference therebetween, means for atomizing and directing finely divided particles of liquid coating material towards the path of article-travel for electrostatic deposition on the article, means for creating a carrier gas stream, and baflles arranged to direct the gas stream into said field, along the path of travel of said article, and generally perpendicular to the lines of force of said field for picking up and carrying suspended particles of coating material into position to be electrostatically deposited on said article as it passes through said. zone.
  • Apparatus for coating articles including means for conveying an article to be coated along a predetermined path through a spray zone, a discharge electrode mounted in said zone extending along the path of travel of said article, a source of high voltage electrically associated with said article and electrode to provide a. field of high potential difierence therebetween, means for atomizing and directing finely divided particles of liquid coating material toward said path, andmeans for inducing an independent carrier gas stream through said field for receiving suspended particles of coating material and conveying them along the path of travel of said article during its passage through said zone.
  • Apparatus for coating articles including a cabinet, means for conveying a column of articles to be coated through a side wall of said cabinet and thence centrally and longitudinally thereof, a discharge electrode mounted in said cabinet in spaced relation to and extending along the path of travel of said articles, a source of high voltage electrically associated with said articles and electrode to provide a field of high potential difference therebetween, means for atomizing and directing finely divided particles of liquid coating material towards said articles for electrostatic deposition thereon, means for inducing a carrier gas stream along and counter to the path of travel of said articles through said field, and barier means adjacent the end of said cabinet from which the articles emerge for directing said gas stream toward said articles and into said field.
  • Apparatus for coating articles including an elongated spray cabinet having an outlet end for said articles and a restricted intake passage in the side wall thereof, means for conveying a column of said articles to be coated in spaced relation through said intake passage, longitudinally of said cabinet and through said outlet end, a discharge electrode mounted in said cabinet in spaced relation thereto and extending along the path of travel of said articles, a source of high voltage electrically associated with said articles and electrode to provide a field of high potential difierence therebetween, means for atomizing and directing finely divided particles of liquid coating material towards said column of articles as they pass longitudinally of said cabinet for electrostatic deposition thereon, baiiies provided at the outlet end of said cabinet adjacent said atomizing means extending towards said articles and said field, and a means at the opposite end of said cabinet beyond the path of travel of said articles for drawing a carrier gas through said field and along their path of travel, said baiiies being so arranged as to direct the incoming carrier gas towards said articles and field in the zone of the atomized coating material,
  • Apparatus for coating articles including means for supporting an article to be coated in a predetermined position in a coating zone, a discharge electrode mounted in said zone in spaced relation to said article, a source of high voltage electrically associated with said article or its support and said discharge electrode to provide a field of high potential difierence therebetween, means for atomizing and directing finely divided particles of coating material for electrostatic deposition onto said article, and means for providing a carrier gas stream in addition to the atomizing means for controlling particles of coating material prior to electrostatic deposition onto said article.
  • Apparatus for coating an article comprising a chamber having near its opposite ends inlet and discharge openings of smaller cross-sectional area than the chamber, means for supporting an article to be coated between said inlet and discharge openings, an electrode spaced laterally of said chamber and from an article supported by said supporting means, a high-voltage source having its opposite terminals associated respectively with said article and electrode to create an electrostatic field therebetween, means for withdrawing air from said discharge opening to create an air stream flowing through 'said field and over the article, and means for introducing finely divided coated material into said air stream prior to its moving into said field.
  • a method of electrostatically depositing a liquid coating material on the surface of an article comprising creating an air stream of relatively low velocity and confining it laterally to cause it to flow through a zone of deposition in which coating material is to be applied to the article, moving the article over a predetermined path which includes a stretch extending in the zone of deposition longitudinally of said air stream, maintaining an electrostatic field over the surface of the article during its passage through the zone of deposition, and introducing into said stream a relatively high-velocity, divergent jet of atomized liquid coating material, said jet being introduced into said air stream at a point therein upstream from the zone of deposition and being directed generally toward said zone whereby said air stream will supplement the initial momentum of the atomized coating material in causing such material to move into and along the zone of deposition, will insure that undeposited coating-material particles in the zone of deposition possess a minimum velocity longitudinally of said zone, and will materially reduce the relative magnitude of differences between the respective longitudinal velocities of undeposited coating-material particles.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US57472145 1945-01-26 1945-01-26 ransburg Expired - Lifetime US2442986A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE462454D BE462454A (it) 1945-01-26
NL65859D NL65859C (it) 1945-01-26
US57472145 US2442986A (en) 1945-01-26 1945-01-26 ransburg
FR919751D FR919751A (fr) 1945-01-26 1946-01-07 Recouvrement électrostatique

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528087A (en) * 1948-01-02 1950-10-31 Kwikset Locks Inc Apparatus for spray coating
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
US2612595A (en) * 1948-02-12 1952-09-30 Girdler Corp Adjustable electrode assembly for high-frequency heating systems
US2618733A (en) * 1948-10-26 1952-11-18 Raytheon Mfg Co Radio frequency drying device
US2632716A (en) * 1945-09-29 1953-03-24 Ransburg Electro Coating Corp Method of coating articles
US2661310A (en) * 1949-06-25 1953-12-01 Spra Con Co Apparatus for and method of painting
US2700182A (en) * 1950-10-28 1955-01-25 Firestone Tire & Rubber Co Electronic processing of dielectric articles
US2724661A (en) * 1951-12-07 1955-11-22 Ransburg Electro Coating Corp Spray coating method
US2741218A (en) * 1950-11-10 1956-04-10 Ransburg Electro Coating Corp Electrostatic coating apparatus
US2764125A (en) * 1952-02-14 1956-09-25 Ransburg Electro Coating Corp Electrostatic atomizing and coating apparatus
DE961333C (de) * 1951-10-25 1957-04-04 Metallgesellschaft Ag Verfahren und Einrichtung zur Oberflaechenbehandlung im elektrostatischen Feld, beispielsweise zum Lackieren von Gegenstaenden
US2789922A (en) * 1952-05-24 1957-04-23 Stewart Warner Corp Method and apparatus for applying a thin film of liquid
US2847324A (en) * 1955-07-21 1958-08-12 Schoepe Adolf Method and apparatus for control of charged particles in electrostatic machines
US2878143A (en) * 1953-10-12 1959-03-17 Ransburg Electro Coating Corp Electrostatic coating system with a curved article path inclined to produce a constant rate vertical movement of the article
US2994618A (en) * 1957-01-22 1961-08-01 Trion Inc Method and apparatus for electrostatic coating
US3049092A (en) * 1959-07-24 1962-08-14 Interplanetary Res & Dev Corp Apparatus for the electrostatic coating of articles
DE1136620B (de) * 1952-03-05 1962-09-13 Harper J Ransburg Company Vorrichtung zum elektrostatischen UEberziehen
DE1197790B (de) * 1958-01-23 1965-07-29 Gen Motors Corp Elektrostatischer Rotationszerstaeuber fuer Fluessigkeitsauftragsvorrichtungen, insbesondere fuer das Spritzlackieren
US3376156A (en) * 1964-03-19 1968-04-02 Douglas C. Whitaker Spray painting employing high voltage charging
DE2425941A1 (de) * 1973-06-01 1975-01-02 Energy Innovations Fliessband-lackieranlage zum lackieren einer serie von werkstuecken mit einem pulver
US3866571A (en) * 1973-08-15 1975-02-18 Nat Steel Corp Apparatus for electrostatically depositing a uniform coating of finely divided coating material on moving substrates
US4230068A (en) * 1977-06-13 1980-10-28 Onoda Cement Company, Ltd. Apparatus used in continuous process for electrostatic coating with pulverized material
US4321281A (en) * 1976-11-10 1982-03-23 Onoda Cement Co., Ltd. Process for electrostatic coating with pulverized material and apparatus used in said process
US4325319A (en) * 1980-01-18 1982-04-20 Caterpillar Tractor Co. Air flow system for the charging conductor in an electrostatic painting system
DE3319995A1 (de) * 1982-06-10 1983-12-15 Fuji Photo Film Co., Ltd., Minami Ashigara, Kanagawa Elektrostatisches spritzgeraet
EP0238238A2 (en) * 1986-03-17 1987-09-23 Nordson Corporation Improvements in and relating to a powder booth
WO2007006674A1 (de) * 2005-07-07 2007-01-18 Siemens Aktiengesellschaft Verfahren zum herstellen einer nanopartikel aufweisenden schicht auf einem substrat
CN111229506A (zh) * 2020-03-18 2020-06-05 长丰吾道智能光电科技有限公司 一种盒体自动挂取喷漆系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032419A (en) * 1989-12-26 1991-07-16 Ball Corporation Method of electrostatically depositing smaller particles first

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484867A (en) * 1921-10-03 1924-02-26 Bradley & Vrooman Company Apparatus for coating objects
US1855869A (en) * 1928-12-31 1932-04-26 Western Electric Co Method of and apparatus for coating articles
US2053781A (en) * 1932-06-04 1936-09-08 Sylvania Ind Corp Apparatus for moistureproofing materials
US2097233A (en) * 1934-03-31 1937-10-26 Research Corp Electrical deposition in pattern form
US2247963A (en) * 1939-06-29 1941-07-01 Harper J Ransburg Apparatus for spray coating articles
US2302289A (en) * 1938-12-06 1942-11-17 Union Oil Co Electrified spray method and apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484867A (en) * 1921-10-03 1924-02-26 Bradley & Vrooman Company Apparatus for coating objects
US1855869A (en) * 1928-12-31 1932-04-26 Western Electric Co Method of and apparatus for coating articles
US2053781A (en) * 1932-06-04 1936-09-08 Sylvania Ind Corp Apparatus for moistureproofing materials
US2097233A (en) * 1934-03-31 1937-10-26 Research Corp Electrical deposition in pattern form
US2302289A (en) * 1938-12-06 1942-11-17 Union Oil Co Electrified spray method and apparatus
US2247963A (en) * 1939-06-29 1941-07-01 Harper J Ransburg Apparatus for spray coating articles

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567781A (en) * 1945-04-23 1951-09-11 Ransburg Electro Coating Corp Method for coating articles
US2632716A (en) * 1945-09-29 1953-03-24 Ransburg Electro Coating Corp Method of coating articles
US2528087A (en) * 1948-01-02 1950-10-31 Kwikset Locks Inc Apparatus for spray coating
US2612595A (en) * 1948-02-12 1952-09-30 Girdler Corp Adjustable electrode assembly for high-frequency heating systems
US2618733A (en) * 1948-10-26 1952-11-18 Raytheon Mfg Co Radio frequency drying device
US2661310A (en) * 1949-06-25 1953-12-01 Spra Con Co Apparatus for and method of painting
US2568611A (en) * 1949-07-16 1951-09-18 Ransburg Electro Coating Corp Coating method and apparatus
US2700182A (en) * 1950-10-28 1955-01-25 Firestone Tire & Rubber Co Electronic processing of dielectric articles
US2741218A (en) * 1950-11-10 1956-04-10 Ransburg Electro Coating Corp Electrostatic coating apparatus
DE961333C (de) * 1951-10-25 1957-04-04 Metallgesellschaft Ag Verfahren und Einrichtung zur Oberflaechenbehandlung im elektrostatischen Feld, beispielsweise zum Lackieren von Gegenstaenden
US2724661A (en) * 1951-12-07 1955-11-22 Ransburg Electro Coating Corp Spray coating method
US2764125A (en) * 1952-02-14 1956-09-25 Ransburg Electro Coating Corp Electrostatic atomizing and coating apparatus
DE1136620B (de) * 1952-03-05 1962-09-13 Harper J Ransburg Company Vorrichtung zum elektrostatischen UEberziehen
US2789922A (en) * 1952-05-24 1957-04-23 Stewart Warner Corp Method and apparatus for applying a thin film of liquid
US2878143A (en) * 1953-10-12 1959-03-17 Ransburg Electro Coating Corp Electrostatic coating system with a curved article path inclined to produce a constant rate vertical movement of the article
DE1151452B (de) * 1953-10-12 1963-07-11 Harper J Ransburg Company Vorrichtung zum UEberziehen von Werkstuecken
US2847324A (en) * 1955-07-21 1958-08-12 Schoepe Adolf Method and apparatus for control of charged particles in electrostatic machines
US2994618A (en) * 1957-01-22 1961-08-01 Trion Inc Method and apparatus for electrostatic coating
DE1197790B (de) * 1958-01-23 1965-07-29 Gen Motors Corp Elektrostatischer Rotationszerstaeuber fuer Fluessigkeitsauftragsvorrichtungen, insbesondere fuer das Spritzlackieren
US3049092A (en) * 1959-07-24 1962-08-14 Interplanetary Res & Dev Corp Apparatus for the electrostatic coating of articles
US3376156A (en) * 1964-03-19 1968-04-02 Douglas C. Whitaker Spray painting employing high voltage charging
DE2425941A1 (de) * 1973-06-01 1975-01-02 Energy Innovations Fliessband-lackieranlage zum lackieren einer serie von werkstuecken mit einem pulver
US3991710A (en) * 1973-06-01 1976-11-16 Energy Innovations, Inc. Electrogasdynamic production line coating system
US3866571A (en) * 1973-08-15 1975-02-18 Nat Steel Corp Apparatus for electrostatically depositing a uniform coating of finely divided coating material on moving substrates
US4321281A (en) * 1976-11-10 1982-03-23 Onoda Cement Co., Ltd. Process for electrostatic coating with pulverized material and apparatus used in said process
US4230068A (en) * 1977-06-13 1980-10-28 Onoda Cement Company, Ltd. Apparatus used in continuous process for electrostatic coating with pulverized material
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EP0238238A3 (en) * 1986-03-17 1988-08-24 Nordson Corporation Improvements in and relating to a powder booth
WO2007006674A1 (de) * 2005-07-07 2007-01-18 Siemens Aktiengesellschaft Verfahren zum herstellen einer nanopartikel aufweisenden schicht auf einem substrat
US20090047444A1 (en) * 2005-07-07 2009-02-19 Siemens Aktiengesellschaft Method for production of a layer having nanoparticles, on a substrate
US7906171B2 (en) 2005-07-07 2011-03-15 Siemens Aktiegesellschaft Method for production of a layer having nanoparticles, on a substrate
CN111229506A (zh) * 2020-03-18 2020-06-05 长丰吾道智能光电科技有限公司 一种盒体自动挂取喷漆系统

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BE462454A (it)
NL65859C (it)

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