US2996042A - Electrostatic spray coating system - Google Patents
Electrostatic spray coating system Download PDFInfo
- Publication number
- US2996042A US2996042A US487498A US48749855A US2996042A US 2996042 A US2996042 A US 2996042A US 487498 A US487498 A US 487498A US 48749855 A US48749855 A US 48749855A US 2996042 A US2996042 A US 2996042A
- Authority
- US
- United States
- Prior art keywords
- spray
- atomizer
- electrode
- coating
- article
- 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
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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
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
-
- 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
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- 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
Definitions
- This invention relates to the coating of articles of manufacture with a spray of electrically charged liquid coating material particles and more particularly to methods and apparatus for controlling the distribution of spray particles moved through a quiescent atmosphere and deposited on the surface of an article under the infiuence of an electrostatic field.
- quiescen is here used in the sense that the atmosphere or air trite States Patent through which the charged spray particles move as they paths of the spray particles and their distribution over the surface of the article being coated.
- United States Patent No. 2,736,671 issued February 28, 1956 discloses a system of electrostatic spray coating in which the spray particles are atomized from the circular edge of a rotating bell-shaped atomizing head and are projected in a direction generally axial of such edge by an electrostatic field maintained between the atomizer and an article being coated.
- the pattern in which the spray from such an annular-edged device is deposited on a stationary flat surface of relatively large area maintained substantially normal to the axis of the atomizer (which pattern will hereinafter be referred to as a static pattern) is an annulus having a center portion substantially devoid of spray particles.
- the spray will form on the surface a band of coating material characterized generally by the fact that it increases in thickness for a distance from its longitudinal center toward its side edges.
- the cross-sectional shape of a band so produced will hereinafter be referred to as a dynamic pattern.
- the dynamic pat tern produced by an unmodified annular spray may be such that the thickness at and adjacent the center of the band is half, or even less than half, that at points nearer the sides of the band.
- I provide an annular-edged atomizing device, such as one of the usual type disclosed in the aforesaid E. M. Ransburg patent, No. 2,73 6,671, capable of projecting a normally annular spray of electrically charged particles in a general axial direction, and I associate such atomizing device with a conveyor adapted to move through the axially projected spray the article or articles to be coated.
- I employ an electrode which provides spray-repelling zones near the annular edge of the atomizer and effectively confined to regions located adjacent the ends of an edge-diameter extending transversely to the path of article movement.
- Such spray-repelling zones improve uniformity in the thickness of coatings produced on extended surfaces and provide a spray which is well adapted to triggered control.
- the spray-repelling zones tend to divide the spray along a plane extending axially of the atomizer and transverse to the path of article movement.
- the atomizer may be arranged for movement into spaces between adjacent articles, and in such an arrangement the spray-spilling tendency of the spray-repelling zones promotes a uniform division of the spray between the adjacent articles.
- FIG. 1 is a isometric view illustrating apparatus for practicing my invention in the coating of automobile bodies
- FIG. 2 is a fragmental side'elevation, in partial section, illustrating one of the atomizers shown in FIG. 1;
- FIG. 3 is a plan view illustrating in somewhat idealized form the static pattern produced by one specific embodiment of my invention.
- FIG. 4 is a view similar to FIG. 3 showing the static pattern produced by another embodiment of my invention.
- automobile bodies 10 are passed in succession and in spaced relation through a coating zone by a conveyor diagrammatically indicated at 11.
- a conveyor diagrammatically indicated at 11 At each side of the conveyor there is a pair of atomizers 13 positioned to discharge a paint spray horizontally against the lower portion of the side of the automobile body and a second pair of atomizers 14 arranged to discharge paint sprays horizontally against the upper portions of the automobile-body sides; and above the path followed by the automobile bodies there is another atomizer 15 arranged to project a paint spray downwardly to coat the tops of the bodies.
- the atomizer 15 will be mounted for vertical movement under control of a fluid pressure cylinder 16 so that it may enter the space between adjacent automobile bodies and discharge coating material onto the opposed front and rear surfaces thereof.
- the atomizer includes a rotatable atomizing hell or head 17 having a peripheral atomizing edge 17a and mounted for rotation on one end of a hollow shaft of a motor (not shown) mounted within a housing 18.
- bell 17 When the motor is energized, bell 17 will rotate about a line 17x which is the axis of the atomizer and the bell.
- Liquid coating material is fed from a reservoir at a controlled rate through a conduit 20 to a stationary feed tube 21 running through the hollow motor shaft and projecting into the atomizing bell 17.
- Electrode terminals 24a and 2412 are positioned adjacent diametrically opposite portions of atomizing edge 17a.
- the atomizer 14, or at least the head 17 and electrode terminals 24a and 24b, is maintained at a high electrical po tential relative to autobody 11, as by connecting the atomizer to the high voltage terminal of a high-voltage source 26 and grounding the autobody through its con- ,veyor.
- the liquid thus fed to the surface of the bell will be formed by centrifugal force into a thin film flowing outwardly over the inner surface to the atomizing edge 17a, where it will be atomized under the influence of the electrostatic field maintained between edge 17:: and the surface-f body to form a spray of electrically charged particles which will be moved to and deposited on the body 10 by the aforesaid field.
- the spray of charged particles is annular in cross-section, and would tend to retain that annular cross-sectional form if it were not for the electrode 24.
- the electrode 24 modifies the spray by effecting a redistribution of the spray particles both parallel to and perpendicular to the axial plane in which the electrodes lie.
- the nature and extent of such redistribution will depend upon several factors including principally the radial and axial location of the electrode tips 24a and 24b.
- FIG. 3 I have illustrated a slightly idealized static pattern produced by one specific atomizer having the following characteristics:
- the static pattern of FIG. 3 had a width (extent parallel to the median line 32) of about forty inches.
- the static pattern instead of being a uniform annulus, comprises two generally similar, arcuate lobes 30a and 30b symmetrical abouta common or longitudinal center-line ,31 :and sym 4 metrically disposed on opposite sides of a transverse median line 32 with their concave edges presented toward such median line.
- FIG. 3 it has been attempted to illustrate only the outlines of the static pattern, which are rather ill defined; and no attempt has been made to illustrate the distribution of the spray particles within thecutlines. Enough of the circumferential momentum of the coatingmaterial supplied to the edge of the atomizer head 17 persists to cause the median line 32 to be displaced angularly from the axial plane occupied by the electrode 24. In the specific example illustrated in FIG. 3, such displacement amounted to about 10 and was, of course, in the direction of head-rotation.
- the dynamic pattern produced on such sheet instead of possessing the relatively thin center portion characteristic of dynamic patterns produced by unmodified annular sprays, will be of a generally trapezoidal shape, having a center portion of substantial transverse extent and relatively uniform thickness. If the sheet has a width somewhat less than the transverse extent of the static pattern, as is the case in the sheet 35 illustrated in FIG.
- the marginal portions of the spray near the ends of the lobes 30a and 3011, which spray-portions would form the extreme tips of the trapezoidal dynamic pattern, will be drawn inwardly by the electrostatic field existing over the face of the sheet, and the sheet will receive a substantially uniform coating from one edge to the other.
- a plurality of atomizers may be employed, offset from each other laterally of the path of sheet movement to the extent necessary to cause the tips of the trapezoidal dynamic patterns of adjacent atomizers to overlap slightly.
- the use of overlapping dynamic patterns of trapezoidal shape to build a coating of uniform thickness is more fully illustrated and described in the Juvinall et al. patent above referred to.
- the improved uniformity in the thickness of the dynamic pattern produced by my invention is due to a lateral redistribution of the particles in the normally annular spray.
- Some of the particles directed toward surface portions which would be coated to abnormal thickness by an unmodified spray are usually deflected inwardly or toward the center of the dynamic pattern, and some are deflected outwardly.
- the outward deflection increases the overall width of the dynamic pattern to a slight extent and also decreases the slope of its inclined sides.
- the latter feature is of advantage when wide surfaces are coated with a plurality of sprays, as it renders less critical the extent to which the dynamic patterns of adjacent sprays overlap in the production of a reasonably uniform coating.
- the longitudinal redistribution of particles, or redistribution in the direction parallel to the longitudinal center-line 31, has an advantage when the atomizer is triggered.
- triggering it is customary to initiate sprayprojection after the article being coated has partially entered the normal static pattern of the spray and to terminate spray projection befor'e the article has moved completely out of such static pattern. If the spray were initiated before the article entered the normal static pattern and maintained until the article cleared such pattern, considerable coating material might be lost; and on the other hand, if the spray is initiated too late or terminated too early, the leading and trailing portions of the article will not receive an adequate coating.
- an atomizer employed to coat a sheet 35 moving in the direction indicated by the arrow in FIG.
- the end portions, or at least one end portion of the static pattern are concentrated within a fraction of the width of the entire pattern, and the failure of the sheet to receive them would result in a localized reduction in coating thickness.
- the longitudinal rearrangement of the spray particles is such that particles near the sides of the static pattern-i.e., near the ends of the lobes 30a and 30bare displaced away from the median line 32 to an extent greater than are particles near the longitudinal center-line 31.
- the paint of which the trailing edge of the sheet 35 is deprived when the atomizer is triggered is paint which would have been reasonably well distributed transversely of the sheet, and the effect of triggering in creating disuniformity of coating thickness along the trailing edge of the sheet is materially reduced if not practically eliminated.
- the electrode 24 be so constructed and arranged as to split the static pat-tern into two substantially discrete lobes, such as are shown in FIG. 3.
- the static pattern approximates an annulus notched internally at diarnetrically opposite points and having an outer periphery which is substantially continuous.
- the static pattern of FIG. 4 like that of FIG. 3, had awidth of about forty inches and Was produced under the same conditions except that the electrode tips 24a and 24b were spaced one-quarter inch ahead of and one-half inch inwardly from the atomizing edge 17a.
- the dynamic pattern produced by the spray of FIG. 4 was markedly more uniform than that produced by an unmodified annular spray but somewhat less uniform than that produced by the spray of FIG. 3.
- the electrode 24 produces a relatively small effect on the outline of the static pattern its tendency to split the spray can nevertheless produce a substantial effect on the distribution of particles within that outline.
- a comparison of maximum or average thickness along the median line with maximum or average thickness along diameters angularly remote from the median line is at least a rough measure of the effectiveness of the electrode 24 in providing desirable alteration of the dynamic pattern.
- the tendency of the electrode 24 to divide the spray in the manner just described is of particular advantage when, as in the case of the atomizer 15 shown in FIG. 1, an atomizer is advanced into the region between two spaced articles to coat opposed surfaces of such articles; as in such a situation, the transversely arranged electrode promotes an equal division of the spray between such opposed surfaces.
- the precise location of the electrode tips 24a and 24b is subject to some variation. So far as concerns the beneficial redistributing effect of the electrode 24 its tips may lie on the radius of the spray-source or well inwardly or outwardly therefrom. However, projection of they tips radially beyond the atomizing edge 17a tends to cause a deterioration in the quality of electrostatically produced atomization, and excessive radial projection may in addition result in the coating of the tips, which is undesirable.
- Deterioration of atomization may be expected if the electrode tips lie outside a hypothetical conical survface coaxial with the edge 17a, passing therethrough, and having an included apical angle of 30, and electrode coating may be expected if the tips lie outside a similar conical surface having an included apical angle of Electrodes 24 having a diametric extent as small as twothirds the diameter of the edge 17a have been found effective in promoting a beneficial redistribution of spray particles. Axially, the electrode tips may be located close to the plane of the edge 17a or well beyond such plane in the direction of spray-projection.
- the plane of the electrode 24 is preferably displaced from a plane perpendicular to the direction of article travel by an angular interval such that the median line 32 of the static pattern at the article surface will lie in the latter plane.
- the static pattern of the spray be divided otherwise than at a plane perpendicular to the path of article travel.
- the presence of the window openings in the upper portion of the automobile bodies illustrated in FIG. 1 may make it desirable to orient the electrode 24 associated with one or each of the heads 14 so that the splitting of the static pattern will be along an inclined plane to promote a division of the spray between the upper and lower edges of the window openings.
- the head 17 and electrode 24 are directly connected electrically and will therefore have the same potential. This feature is not necessary; as the head and electrode might have different potentials so long as that of the electrode is effectively spray-repelling.
- my invention In addition to being better adapted to a triggered operation than are prior arrangements designed to improve uniformity in the coating produced by annular sprays, my invention possesses other important advantages, including simplicity of construction and an improved capability of functioning satisfactorily in spite of variations in operating conditions, such as the spacing between atomizers and work, the type of coating material handled, and the rate at which such material is supplied to the atomizer.
- Apparatus for electrostatically spray coating an article comprising an atomizer having an annular atomizing edge lying concentrically about an axis of said atomizer, means for moving the article to be coated along a predetermined path axially spaced from said atomizing edge, means including a source of high voltage for creating an electrostatic field between the moving article and coating material at said annular atomizing edge, means for feeding liquid coating material at a controlled rate to said annular edge for atomization therefrom as a hollow spray of liquid particles and projection toward the article to be coated, a single electrode mounted on the atomizer having but two end portions located within the spray and on diametrically opposite sides of the spray axis, said end portions lying substantially in a single plane extending axially of the atomizer and transverse to said path of article movement, and means for maintaining said electrode end portions at a particle repelling potential to reduce the concentration of spray particles in diametrically opposite regions of the spray adjacent such plane and increase the concentration of spray particles in two similar bands located on opposite sides of and and
- the apparatus of claim 1 including means for moving a plurality of articles in succession and in spaced relationship along said path and means for sequentially moving said atomizer into the space between adjacent articles and withdrawing said atomizer from said space as the next article approaches the atomizer, whereby the spray concentrated in one of said bands is deposited on the retreating face of one article and the spray concentrated in the other band is deposited on the approaching face of the succeeding article.
- Apparatus for electrostatically spray coating an article comprising an atomizer having an annular atomizing edge lying concentrically about an axis of said atomizer, means for moving the article to be coated along a predetermined path axially spaced from said atomizing edge, means including a source of high voltage for creating an electrostatic field between the moving article and coating material at said annular atomizing edge, means for feeding liquid coating material at a controlled rate to said annular edge for atomization therefrom as a hollow spray of liquid particles and projection toward the article to be coated, means providing only two electrode end portions located within the spray and on diametrically opposite sides of the spray axis, said end portions lying substantially in a single plane extending axially of the atomizer and transverse to said path of article movement, and means for maintaining said electrode end portions at a particle repelling potential to reduce the concentration of spray particles in diametrically opposite regions of the spray adjacent such plane and increase the concentration of spray particles in two similar bands located on opposite sides of and extending generally parallel to such plane.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US487498A US2996042A (en) | 1955-02-11 | 1955-02-11 | Electrostatic spray coating system |
GB2940/56A GB830514A (en) | 1955-02-11 | 1956-01-30 | Improvements in or relating to electrostatic spray coating |
DER18233A DE1291655B (de) | 1955-02-11 | 1956-01-31 | Rotierender Zerstaeuber zum elektrostatischen UEberziehen eines Werkstueckes mit fluessigem UEberzugsmaterial |
FR1152593D FR1152593A (fr) | 1955-02-11 | 1956-02-10 | Perfectionnement aux revêtements par pulvérisation électrostatique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US487498A US2996042A (en) | 1955-02-11 | 1955-02-11 | Electrostatic spray coating system |
Publications (1)
Publication Number | Publication Date |
---|---|
US2996042A true US2996042A (en) | 1961-08-15 |
Family
ID=23935966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US487498A Expired - Lifetime US2996042A (en) | 1955-02-11 | 1955-02-11 | Electrostatic spray coating system |
Country Status (4)
Country | Link |
---|---|
US (1) | US2996042A (fr) |
DE (1) | DE1291655B (fr) |
FR (1) | FR1152593A (fr) |
GB (1) | GB830514A (fr) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3279421A (en) * | 1962-04-03 | 1966-10-18 | Ransburg Electro Coating Corp | Electrostatic spray coating systems |
US4909180A (en) * | 1986-12-27 | 1990-03-20 | Toyota Jidosha Kabushiki Kaisha | Assembly of electrostatic rotary sprayers |
US5647535A (en) * | 1994-10-21 | 1997-07-15 | Honda Giken Kogyo Kabushiki Kaisha | Method of metallic painting |
US20080149026A1 (en) * | 2006-12-21 | 2008-06-26 | Illinois Tool Works Inc. | Coating material dispensing apparatus and method |
US20090020626A1 (en) * | 2007-07-16 | 2009-01-22 | Illinois Tool Works Inc. | Shaping air and bell cup combination |
US20090140083A1 (en) * | 2007-11-30 | 2009-06-04 | Seitz David M | Repulsion ring |
US20090314855A1 (en) * | 2008-06-18 | 2009-12-24 | Illinois Tool Works Inc. | Vector or swirl shaping air |
US20160271631A1 (en) * | 2013-11-12 | 2016-09-22 | Sames Technologies | Electrostatic sprayer of coating product and projection assembly comprising such a sprayer |
EP3081309A1 (fr) * | 2015-04-17 | 2016-10-19 | Ransburg Industrial Finishing K.K. | Appareil et procédé de revêtement |
WO2020021109A1 (fr) * | 2018-07-26 | 2020-01-30 | Ecoclean Gmbh | Dispositif de nettoyage |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2083634A (en) * | 1936-01-11 | 1937-06-15 | Gen Motors Corp | Spraying machine |
US2097233A (en) * | 1934-03-31 | 1937-10-26 | Research Corp | Electrical deposition in pattern form |
US2203851A (en) * | 1937-08-09 | 1940-06-11 | Tucci Anthony John | Spraying apparatus |
US2221338A (en) * | 1936-10-21 | 1940-11-12 | Research Corp | Deposition of material |
US2302289A (en) * | 1938-12-06 | 1942-11-17 | Union Oil Co | Electrified spray method and apparatus |
GB591474A (en) * | 1944-01-03 | 1947-08-19 | Harper J Ransburg | Apparatus for spray coating articles |
US2434125A (en) * | 1941-10-01 | 1948-01-06 | Howard V Schweitzer | Painting method |
US2447374A (en) * | 1934-04-25 | 1948-08-17 | Granne Trust Company | Method of applying coating materials |
US2509448A (en) * | 1944-06-28 | 1950-05-30 | Ransburg Electro Coating Corp | Apparatus for electrostatically coating articles |
GB679751A (en) * | 1949-03-25 | 1952-09-24 | Gen Motors Corp | Improved method of and apparatus for spray coating articles |
US2658009A (en) * | 1948-05-13 | 1953-11-03 | Ransburg Electro Coating Corp | Electrostatic coating method and apparatus |
US2658472A (en) * | 1948-10-29 | 1953-11-10 | Ransburg Electro Coating Corp | Electrostatic coating apparatus |
US2710773A (en) * | 1952-08-27 | 1955-06-14 | Sedlacsik John | Electrostatic spray coating apparatus |
US2777419A (en) * | 1951-04-05 | 1957-01-15 | Cline Electric Mfg Co | Spraying apparatus for successive articles carried by a conveyor |
US2780565A (en) * | 1953-07-17 | 1957-02-05 | Ransburg Electro Coating Corp | Electrostatic spray coating system and method |
US2877137A (en) * | 1952-05-13 | 1959-03-10 | Ransburg Electro Coating Corp | Method of electrostatically coating an article |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE519260A (fr) * | 1952-04-18 | |||
NL109067C (fr) * | 1952-07-29 | 1900-01-01 |
-
1955
- 1955-02-11 US US487498A patent/US2996042A/en not_active Expired - Lifetime
-
1956
- 1956-01-30 GB GB2940/56A patent/GB830514A/en not_active Expired
- 1956-01-31 DE DER18233A patent/DE1291655B/de active Pending
- 1956-02-10 FR FR1152593D patent/FR1152593A/fr not_active Expired
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2097233A (en) * | 1934-03-31 | 1937-10-26 | Research Corp | Electrical deposition in pattern form |
US2447374A (en) * | 1934-04-25 | 1948-08-17 | Granne Trust Company | Method of applying coating materials |
US2083634A (en) * | 1936-01-11 | 1937-06-15 | Gen Motors Corp | Spraying machine |
US2221338A (en) * | 1936-10-21 | 1940-11-12 | Research Corp | Deposition of material |
US2203851A (en) * | 1937-08-09 | 1940-06-11 | Tucci Anthony John | Spraying apparatus |
US2302289A (en) * | 1938-12-06 | 1942-11-17 | Union Oil Co | Electrified spray method and apparatus |
US2434125A (en) * | 1941-10-01 | 1948-01-06 | Howard V Schweitzer | Painting method |
GB591474A (en) * | 1944-01-03 | 1947-08-19 | Harper J Ransburg | Apparatus for spray coating articles |
US2509448A (en) * | 1944-06-28 | 1950-05-30 | Ransburg Electro Coating Corp | Apparatus for electrostatically coating articles |
US2658009A (en) * | 1948-05-13 | 1953-11-03 | Ransburg Electro Coating Corp | Electrostatic coating method and apparatus |
US2658472A (en) * | 1948-10-29 | 1953-11-10 | Ransburg Electro Coating Corp | Electrostatic coating apparatus |
GB679751A (en) * | 1949-03-25 | 1952-09-24 | Gen Motors Corp | Improved method of and apparatus for spray coating articles |
US2777419A (en) * | 1951-04-05 | 1957-01-15 | Cline Electric Mfg Co | Spraying apparatus for successive articles carried by a conveyor |
US2877137A (en) * | 1952-05-13 | 1959-03-10 | Ransburg Electro Coating Corp | Method of electrostatically coating an article |
US2710773A (en) * | 1952-08-27 | 1955-06-14 | Sedlacsik John | Electrostatic spray coating apparatus |
US2780565A (en) * | 1953-07-17 | 1957-02-05 | Ransburg Electro Coating Corp | Electrostatic spray coating system and method |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3279421A (en) * | 1962-04-03 | 1966-10-18 | Ransburg Electro Coating Corp | Electrostatic spray coating systems |
US4909180A (en) * | 1986-12-27 | 1990-03-20 | Toyota Jidosha Kabushiki Kaisha | Assembly of electrostatic rotary sprayers |
US5647535A (en) * | 1994-10-21 | 1997-07-15 | Honda Giken Kogyo Kabushiki Kaisha | Method of metallic painting |
US8104423B2 (en) | 2006-12-21 | 2012-01-31 | Illinois Tool Works Inc. | Coating material dispensing apparatus and method |
US20080149026A1 (en) * | 2006-12-21 | 2008-06-26 | Illinois Tool Works Inc. | Coating material dispensing apparatus and method |
US20090020626A1 (en) * | 2007-07-16 | 2009-01-22 | Illinois Tool Works Inc. | Shaping air and bell cup combination |
US20090140083A1 (en) * | 2007-11-30 | 2009-06-04 | Seitz David M | Repulsion ring |
US8096264B2 (en) | 2007-11-30 | 2012-01-17 | Illinois Tool Works Inc. | Repulsion ring |
US20090314855A1 (en) * | 2008-06-18 | 2009-12-24 | Illinois Tool Works Inc. | Vector or swirl shaping air |
US20160271631A1 (en) * | 2013-11-12 | 2016-09-22 | Sames Technologies | Electrostatic sprayer of coating product and projection assembly comprising such a sprayer |
US10413919B2 (en) * | 2013-11-12 | 2019-09-17 | Sames Kremlin | Electrostatic sprayer of coating product and projection assembly comprising such a sprayer |
EP3081309A1 (fr) * | 2015-04-17 | 2016-10-19 | Ransburg Industrial Finishing K.K. | Appareil et procédé de revêtement |
US11400466B2 (en) | 2015-04-17 | 2022-08-02 | Ransburg Industrial Finishing K.K. | Coating apparatus and coating method |
WO2020021109A1 (fr) * | 2018-07-26 | 2020-01-30 | Ecoclean Gmbh | Dispositif de nettoyage |
Also Published As
Publication number | Publication date |
---|---|
GB830514A (en) | 1960-03-16 |
FR1152593A (fr) | 1958-02-20 |
DE1291655B (de) | 1969-03-27 |
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