EP0472817B1 - Electrostatic spray pistol - Google Patents

Electrostatic spray pistol Download PDF

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Publication number
EP0472817B1
EP0472817B1 EP91107412A EP91107412A EP0472817B1 EP 0472817 B1 EP0472817 B1 EP 0472817B1 EP 91107412 A EP91107412 A EP 91107412A EP 91107412 A EP91107412 A EP 91107412A EP 0472817 B1 EP0472817 B1 EP 0472817B1
Authority
EP
European Patent Office
Prior art keywords
carrier plate
electrostatic spray
spray pistol
voltage generator
capacitor
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
EP91107412A
Other languages
German (de)
French (fr)
Other versions
EP0472817A2 (en
EP0472817A3 (en
Inventor
Georg Simon
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.)
Wagner International AG
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Wagner International AG
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 Wagner International AG filed Critical Wagner International AG
Publication of EP0472817A2 publication Critical patent/EP0472817A2/en
Publication of EP0472817A3 publication Critical patent/EP0472817A3/en
Application granted granted Critical
Publication of EP0472817B1 publication Critical patent/EP0472817B1/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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0531—Power generators

Definitions

  • the invention relates to an electrostatic spray gun, in particular a manual spray gun, for coating workpieces with liquid or powder coating material according to the preamble of patent claim 1
  • LU-A-67 141 discloses a high-voltage generator with the features of the preamble of claim 1, namely a high-voltage cascade for the high-voltage generator of an electrostatic powder coating device, which is implemented by a printed circuit comprising two or more superimposed layers, one layer for even-numbered capacitors and the other layer is for odd-numbered capacitors. Diodes are soldered directly to the connections of the capacitors, and the entire assembly is coated with a resin.
  • the multistage voltage multiplier high-voltage cascade
  • the spray gun for example to install it in the pistol grip or the pistol barrel.
  • the dimensions and the weight of the high-voltage cascade have been reduced in recent years, which is understandably of crucial importance, especially with hand spray guns.
  • the dimensions of the required capacitor and diode modules are likely to be a limit to a further reduction in space and weight set without the goals already being achieved.
  • the object of the present invention is therefore to design a voltage multiplier intended for installation in or attachment to an electrostatic spray gun in such a way that its dimensions and weight can be reduced still further.
  • This object is achieved by a high-voltage generator for an electrostatic spray gun with the features of claim 1.
  • FIG. 1 shows a carrier plate of rectangular extension made of sintered ceramic.
  • a large number of corresponding capacitor areas 11 are printed on the upper and lower surfaces of this carrier plate 10, in the form of two opposing rows of capacitors, similar to the arrangement of the capacitors of a conventional high-voltage cascade.
  • the electrical supply and discharge is carried out by printed conductor tracks 12, which are also printed.
  • FIG Embodiment of the entire high-voltage cascade, the diodes 13 which are still required being applied to the carrier plate 10 with capacitors 11 and conductor tracks 12 from FIG. 1 and are correspondingly connected to the capacitors by soldering.
  • synthetic resin for example.
  • circuit diagram of this high-voltage cascade from FIG. 2 corresponds entirely to that of a high-voltage cascade constructed using conventional capacitors, so that a special explanation is unnecessary.
  • the dimensions and also the weight of the high-voltage cascade according to FIG. 2 are, however, considerably smaller than in the case of conventionally constructed high-voltage cascades.
  • Figure 3 shows a modification of the high-voltage cascade of Figure 2.
  • the modification consists in that the carrier plate 10 of Figure 3 has been extended on one side and protective resistors 14 and / or other electronic components are arranged on the extension area 10 ', as in electrostatic spray guns between the high-voltage output of the cascade and charging electrode are common and necessary.
  • FIG. 4 shows a further carrier plate 15, for example likewise made of sintered ceramic, on which diodes 16 are printed as doped silicon rods or strips and contact areas 17 to form a diode matrix.
  • This carrier plate 15 with a diode matrix is intended for combination with the carrier plate 10, the active surfaces of the carrier plates 10 and 15 being placed on one another by soldering the capacitor and diode connections. Finally, these double plates 10, 15 can then be cast with synthetic resin.
  • the carrier plate 10 preferably consists made of sintered ceramic.
  • the capacitor areas can then be printed on using a layout template, for example.
  • the thickness of the carrier plate 10 must be selected in relation to the capacitors so that no breakdowns occur for a given capacitance, specifically depending on the high-voltage strength and the number of stages of the cascade. If one chooses a comparatively large number of cascade steps for a given total capacity of the voltage multiplier, then a comparatively long carrier plate 10 is required, the thickness of which may be kept small, whereas with a few cascade steps the carrier plate 10 may be short but have a comparatively large thickness got to. In this way it is possible to adapt to the respective requirements, given by the required electrical values and the space available for the respective spray gun.
  • the carrier plate 15 for the diode matrix can also consist of sintered ceramic, but a carrier plate 15 made of insulating plastic is also possible, because a lower dielectric constant is sufficient for the carrier plate 15 than for the carrier plate 10 for the capacitors.
  • the two carrier plates 10, 15 are then placed one on top of the other, it being irrelevant whether the two carrier plates 10, 15 lie directly on one another with their surfaces or are at a minimal distance, because this component 10, 15 ultimately has insulating plastic is cast around.
  • the diode part can also be constructed and encapsulated as is known from today's integrated circuits. Another modification possibility is to design the carrier plates 10 and / or 15 not as straight rectangular plates, but as curved plates, in order to take account of the specified installation conditions. The leadership of the High-voltage cables can be arranged in the curve. Of course, in the case of curved carrier plates, care must be taken that the printed active areas are each of the same size.
  • printing should also be understood to mean known equivalent application methods, such as, for example, vapor deposition and lamination.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Rectifiers (AREA)

Description

Die Erfindung betrifft eine Elektrostatische Sprühpistole, insbesondere Handsprühpistole, zum Beschichten von Werkstücken mit flüssigem oder pulverförmigem Überzugsmaterial gemäß dem Oberbegriff des Patentanspruchs 1The invention relates to an electrostatic spray gun, in particular a manual spray gun, for coating workpieces with liquid or powder coating material according to the preamble of patent claim 1

Die LU-A-67 141 offenbart einen Hochspannungserzeuger mit den Merkmalen des Oberbegriffes des Anspruchs 1 und zwar eine Hochspannungskaskade für den Hochspannungserzeuger einer elektrostatischen Pulverbeschichtungseinrichtung, die durch einen gedruckten Schaltkreis aus zwei oder mehr übereinanderliegenden Schichten realisiert ist, wobei eine Schicht für geradzahlige Kondensatoren und die andere Schicht für ungeradzahlige Kondensatoren vorgesehen ist. Direkt an die Anschlüsse der Kondensatoren sind Dioden angelötet, und die gesamte Baueinheit ist mit einem Harz ummantelt.LU-A-67 141 discloses a high-voltage generator with the features of the preamble of claim 1, namely a high-voltage cascade for the high-voltage generator of an electrostatic powder coating device, which is implemented by a printed circuit comprising two or more superimposed layers, one layer for even-numbered capacitors and the other layer is for odd-numbered capacitors. Diodes are soldered directly to the connections of the capacitors, and the entire assembly is coated with a resin.

Relevanter Stand der Technik ist auch in den Druckschriften US-A-3,902,108 und US-A-4,171,098 offenbart.Relevant prior art is also disclosed in US-A-3,902,108 and US-A-4,171,098.

Es ist seit vielen Jahren bekannt, den aus Kondensatoren und Dioden bestehenden mehrstufigen Spannungsvervielfacher (Hochspannungskaskade) mit der Sprühpistole zu integrieren, beispielsweise in den Pistolengriff oder den Pistolenlauf einzubauen. Durch geschickte Anordnung und Auswahl der Kondensatoren und Dioden der Kaskade ist es dabei in den letzten Jahren gelungen, die Abmessungen und das Gewicht der Hochspannungskaskade immer weiter zu vermindern, was verständlicherweise gerade bei Handsprühpistolen von ausschlaggebender Bedeutung ist. Einer weiteren Raum- und Gewichtsverminderung dürften jedoch jetzt die Dimensionen der erforderlichen Kondensatoren- und Diodenbausteine eine Grenze setzen, ohne daß die Zielvorstellungen bereits erreicht wären.It has been known for many years to integrate the multistage voltage multiplier (high-voltage cascade) consisting of capacitors and diodes with the spray gun, for example to install it in the pistol grip or the pistol barrel. By cleverly arranging and selecting the capacitors and diodes of the cascade, the dimensions and the weight of the high-voltage cascade have been reduced in recent years, which is understandably of crucial importance, especially with hand spray guns. However, the dimensions of the required capacitor and diode modules are likely to be a limit to a further reduction in space and weight set without the goals already being achieved.

Aufgabe der vorliegenden Erfindung ist es deshalb, einen zum Einbau in oder Anbau an eine elektrostatische Sprühpistole bestimmten Spannungsvervielfacher so zu gestalten, daß seine Abmessungen und sein Gewicht noch wesentlich weiter verminderbar sind. Gelöst wird diese Aufgabe durch einen Hochspannungserzeuger für eine elektrostatische Sprühpistole mit den Merkmalen von Anspruch 1.The object of the present invention is therefore to design a voltage multiplier intended for installation in or attachment to an electrostatic spray gun in such a way that its dimensions and weight can be reduced still further. This object is achieved by a high-voltage generator for an electrostatic spray gun with the features of claim 1.

Weitere Merkmale der Erfindung sind in den Unteransprüchen angegeben.Further features of the invention are specified in the subclaims.

Auf der Zeichnung sind Ausführungsformen der Erfindung beispielsweise dargestellt. Es zeigen:

Fig. 1
eine Trägerplatte mit aufgedruckten Kondensatoren,
Fig. 2
in gleicher Ansicht die Leiterplatte von Figur 1 mit aufgelöteten Dioden,
Fig. 3
eine gegenüber Fig. 2 abgewandelte Ausführungsform mit zusätzlich angebrachten Widerständen,
Fig. 4
eine Leiterplatte mit aufgedruckten Dioden.
Embodiments of the invention are shown in the drawing, for example. Show it:
Fig. 1
a carrier plate with printed capacitors,
Fig. 2
in the same view the circuit board of Figure 1 with soldered diodes,
Fig. 3
1 modified embodiment with additional attached resistors,
Fig. 4
a printed circuit board with printed diodes.

In Figur 1 ist eine aus Sinterkeramik bestehende Trägerplatte rechteckiger Erstreckung dargestellt. Auf die obere und untere Oberfläche dieser Trägerplatte 10 ist eine Vielzahl korrespondierender Kondensatorflächen 11 aufgedruckt, und zwar in Form von zwei einander gegenüberliegender Kondensatorreihen, ähnlich der Anordnung der Kondensatoren einer üblichen Hochspannungskaskade. Die elektrische Zu- und Abführung erfolgt durch ebenfalls aufgedruckte Leiterbahnen 12. Figur 2 zeigt dann eine Ausführungsform der gesamten Hochspannungskaskade, wobei auf die Trägerplatte 10 mit Kondensatoren 11 und Leiterbahnen 12 von Figur 1 die noch erforderlichen Dioden 13 aufgebracht und entsprechend durch Lötung mit den Kondensatoren verbunden sind. Zum Schutz der Hochspannungskaskade wird diese dann beispielsweise mit Kunstharz umgossen.FIG. 1 shows a carrier plate of rectangular extension made of sintered ceramic. A large number of corresponding capacitor areas 11 are printed on the upper and lower surfaces of this carrier plate 10, in the form of two opposing rows of capacitors, similar to the arrangement of the capacitors of a conventional high-voltage cascade. The electrical supply and discharge is carried out by printed conductor tracks 12, which are also printed. FIG Embodiment of the entire high-voltage cascade, the diodes 13 which are still required being applied to the carrier plate 10 with capacitors 11 and conductor tracks 12 from FIG. 1 and are correspondingly connected to the capacitors by soldering. To protect the high-voltage cascade, it is then cast with synthetic resin, for example.

Der Schaltplan dieser Hochspannungskaskade von Figur 2 entspricht dabei völlig demjenigen einer unter Verwendung herkömmlicher Kondensatoren aufgebauten Hochspannungskaskade, so daß sich eine besondere Erläuterung erübrigt. Die Abmessungen und auch das Gewicht der Hochspannungskaskade nach Figur 2 sind jedoch wesentlich geringer als bei herkömmlich aufgebauten Hochspannungskaskaden.The circuit diagram of this high-voltage cascade from FIG. 2 corresponds entirely to that of a high-voltage cascade constructed using conventional capacitors, so that a special explanation is unnecessary. The dimensions and also the weight of the high-voltage cascade according to FIG. 2 are, however, considerably smaller than in the case of conventionally constructed high-voltage cascades.

Figur 3 zeigt eine Abwandlungsform der Hochspannungskaskade von Figur 2. Dabei besteht die Abwandlung darin, daß die Trägerplatte 10 von Figur 3 an einer Seite verlängert worden ist und auf dem Verlängerungsbereich 10' Schutzwiderstände 14 und/oder andere elektronischen Bausteine angeordnet sind, wie sie bei elektrostatischen Sprühpistolen zwischen hochspannungsseitigem Ausgang der Kaskade und Ladeelektrode üblich und notwendig sind.Figure 3 shows a modification of the high-voltage cascade of Figure 2. The modification consists in that the carrier plate 10 of Figure 3 has been extended on one side and protective resistors 14 and / or other electronic components are arranged on the extension area 10 ', as in electrostatic spray guns between the high-voltage output of the cascade and charging electrode are common and necessary.

Figur 4 zeigt eine weitere, beispielsweise ebenfalls aus Sinterkeramik bestehende Trägerplatte 15, auf die Dioden 16 als dotierte Siliziumstäbchen bzw. -bänder und Kontaktflächen 17 unter Bildung einer Diodenmatrix aufgedruckt sind. Diese Trägerplatte 15 mit Diodenmatrix ist für die Kombination mit der Trägerplatte 10 bestimmt, wobei die aktiven Oberflächen der Trägerplatten 10 und 15 unter Verlöten der Kondensator- und Diodenanschlüsse aufeinander gelegt werden. Abschließend können dann diese Doppelplatten 10, 15 mit Kunstharz umgossen werden.FIG. 4 shows a further carrier plate 15, for example likewise made of sintered ceramic, on which diodes 16 are printed as doped silicon rods or strips and contact areas 17 to form a diode matrix. This carrier plate 15 with a diode matrix is intended for combination with the carrier plate 10, the active surfaces of the carrier plates 10 and 15 being placed on one another by soldering the capacitor and diode connections. Finally, these double plates 10, 15 can then be cast with synthetic resin.

Die Trägerplatte 10 besteht, wie bereits erwähnt, vorzugsweise aus Sinterkeramik. Die Kondensatorflächen können dann beispielsweise mittels Layoutvorlage aufgedruckt werden. Die Dicke der Trägerplatte 10 muß in Bezug auf die Kondensatoren so gewählt sein, daß bei vorgegebener Kapazität keine Durchschläge entstehen, und zwar so in Abhängigkeit von der Hochspannungsfestigkeit und von der Anzahl der Stufen der Kaskade. Wählt man bei vorgegebener Gesamtkapazität des Spannungsvervielfachers eine vergleichsweise große Anzahl von Kaskadenstufen, dann ist eine vergleichsweise lange Trägerplatte 10 erforderlich, deren Dicke jedoch gering gehalten sein kann, wohingegen bei wenigen Kaskadenstufen die Trägerplatte 10 zwar kurz sein kann, dafür aber eine vergleichsweise große Dicke besitzen muß. Auf diese Weise ist es möglich, sich den jeweiligen Erfordernissen, gegeben durch die erforderlichen elektrischen Werte und den bei der jeweiligen Sprühpistole vorhandenen Platz, anzupassen.As already mentioned, the carrier plate 10 preferably consists made of sintered ceramic. The capacitor areas can then be printed on using a layout template, for example. The thickness of the carrier plate 10 must be selected in relation to the capacitors so that no breakdowns occur for a given capacitance, specifically depending on the high-voltage strength and the number of stages of the cascade. If one chooses a comparatively large number of cascade steps for a given total capacity of the voltage multiplier, then a comparatively long carrier plate 10 is required, the thickness of which may be kept small, whereas with a few cascade steps the carrier plate 10 may be short but have a comparatively large thickness got to. In this way it is possible to adapt to the respective requirements, given by the required electrical values and the space available for the respective spray gun.

Die Trägerplatte 15 für die Diodenmatrix kann ebenfalls aus Sinterkeramik bestehen, jedoch ist auch eine Trägerplatte 15 aus isolierendem Kunststoff möglich, weil bei der Trägerplatte 15 eine geringere Dielektrizitätskonstante genügt, als bei der Trägerplatte 10 für die Kondensatoren. Auch in diesem Fall werden dann die beiden Trägerplatten 10, 15 aufeinander gelegt, wobei es unerheblich ist, ob die beiden Trägerplatten 10, 15 mit ihren Oberflächen direkt aufeinander liegen oder einen minimalen Abstand haben, weil ja dieser Bauteil 10, 15 schließlich mit isolierendem Kunststoff umgossen wird.The carrier plate 15 for the diode matrix can also consist of sintered ceramic, but a carrier plate 15 made of insulating plastic is also possible, because a lower dielectric constant is sufficient for the carrier plate 15 than for the carrier plate 10 for the capacitors. In this case too, the two carrier plates 10, 15 are then placed one on top of the other, it being irrelevant whether the two carrier plates 10, 15 lie directly on one another with their surfaces or are at a minimal distance, because this component 10, 15 ultimately has insulating plastic is cast around.

Der Diodenteil kann aber auch so aufgebaut und umgossen werden, wie dies von den heutigen integrierten Schaltkreisen her bekannt ist. Eine andere Modifikationsmöglichkeit besteht darin, die Trägerplatten 10 und/oder 15 nicht als gerade Rechteckplatten, sondern als gekrümmte Platten auszubilden, um so den vorgegebenen Einbaubedingungen Rechnung zu tragen. Die Führung des Hochspannungskabels kann dabei in der Krümmung angeordnet werden. Freilich ist bei gekrümmten Trägerplatten darauf zu achten, daß die aufgedruckten aktiven Bereiche jeweils gleich groß sind.The diode part can also be constructed and encapsulated as is known from today's integrated circuits. Another modification possibility is to design the carrier plates 10 and / or 15 not as straight rectangular plates, but as curved plates, in order to take account of the specified installation conditions. The leadership of the High-voltage cables can be arranged in the curve. Of course, in the case of curved carrier plates, care must be taken that the printed active areas are each of the same size.

Wenn voranstehend stets vom Aufdrucken der Leiterbahnen und Bauelementflächen die Rede ist, so sollen unter dem Begriff Aufdrucken auch bekannte äquivalente Aufbringungsverfahren verstanden werden, wie etwa das Aufdampfen und das Aufkaschieren.If there is always talk of printing on the conductor tracks and component surfaces above, the term printing should also be understood to mean known equivalent application methods, such as, for example, vapor deposition and lamination.

Claims (7)

  1. A high-voltage generator for an electrostatic spray pistol, in particular a hand spray pistol, for coating work pieces with liquid or powder-type coating material, having a multistage high-voltage cascade of capacitors (11) and diodes (13) which is either built in or attached and represents a voltage multiplier, with the high-voltage cascade having a first carrier plate (10) onto which strip conductors (12) and capacitor surfaces (11) are deposited, and with an insulating mass being cast around the carrier plate (10), characterised in that the capacitor surfaces (11) are imprinted, vapour-deposited or laminated onto opposing plate surfaces, with said capacitor surfaces forming a capacitor matrix, in that the strip conductors (12) are imprinted, vapour-deposited or laminated onto the carrier plate (10), in that the first carrier plate (10) consists of a material having a high dielectric constant, and in that a second carrier plate (15) is provided, onto which a diode matrix is imprinted, vapour-deposited or laminated, which diode matrix corresponds to the capacitor matrix of the first carrier plate (10), with insulating material being cast around the two carrier plates (10, 15), which are provided with the capacitor matrix and the diode matrix respectively and positioned one above the other.
  2. A high-voltage generator for an electrostatic spray pistol according to claim 1, characterised in that the first carrier plate (10) has an extension (10'), which extends beyond the capacitor matrix, for the attachment of resistors (14) and/or other electronic components.
  3. A high-voltage generator for an electrostatic spray pistol according to claim 1 or 2, characterised in that the first carrier plate (10) consists of sintered ceramics.
  4. A high-voltage generator for an electrostatic spray pistol according to one of the preceding claims, characterised in that the second carrier plate (15) consists of sintered ceramics or of synthetic material.
  5. A high-voltage generator for an electrostatic spray pistol according to one of the preceding claims, characterised in that the two carrier plates (10, 15) are combined to form a one-piece ceramic plate, which is imprinted with strip conductors (12), capacitors (11) and diodes (13) by means of thick-film techniques.
  6. A high-voltage generator for an electrostatic spray pistol according to one of the preceding claims, characterised in that the carrier plates (10, 15) are curved.
  7. A high-voltage generator for an electrostatic spray pistol according to one of the preceding claims 2 to 6, characterised in that the resistors and/or other electronic components are imprinted, vapour-deposited or laminated onto the extension (10').
EP91107412A 1990-08-27 1991-05-07 Electrostatic spray pistol Expired - Lifetime EP0472817B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4027078 1990-08-27
DE4027078A DE4027078A1 (en) 1990-08-27 1990-08-27 ELECTROSTATIC SPRAY GUN

Publications (3)

Publication Number Publication Date
EP0472817A2 EP0472817A2 (en) 1992-03-04
EP0472817A3 EP0472817A3 (en) 1992-09-02
EP0472817B1 true EP0472817B1 (en) 1995-08-09

Family

ID=6413016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107412A Expired - Lifetime EP0472817B1 (en) 1990-08-27 1991-05-07 Electrostatic spray pistol

Country Status (4)

Country Link
US (1) US5170315A (en)
EP (1) EP0472817B1 (en)
JP (1) JPH04235763A (en)
DE (2) DE4027078A1 (en)

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Publication number Priority date Publication date Assignee Title
GB9420511D0 (en) * 1994-10-11 1994-11-23 Ici Plc High voltage generator
JP2004167411A (en) * 2002-11-21 2004-06-17 Anest Iwata Corp High voltage generator for electrostatic coating
DE102011121915A1 (en) * 2011-12-22 2013-06-27 Eisenmann Ag Electrode assembly and electrostatic atomizer with such

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US3599038A (en) * 1969-07-28 1971-08-10 Hipotronics Apparatus and systems for high-voltage electrostatic charging of particles
GB1425506A (en) * 1972-03-03 1976-02-18 Redelec High-voltage dc generator in an electrostatic apparatus
IT1006799B (en) * 1973-02-01 1976-10-20 Air Ind WATERFALL MULTIPLIER AND BUILT-IN ELECTROSTATIC SPRAY GUN
SE386841B (en) * 1973-04-19 1976-08-23 Atlas Copco Ab ELECTRIC STATUS SPRAYER
US4033506A (en) * 1974-08-06 1977-07-05 Franz Braun Electrostatic coating guns
US4171098A (en) * 1974-08-06 1979-10-16 Franz Braun Electrostatic coating guns
US4290091A (en) * 1976-12-27 1981-09-15 Speeflo Manufacturing Corporation Spray gun having self-contained low voltage and high voltage power supplies
US4165022A (en) * 1977-03-02 1979-08-21 Ransburg Corporation Hand-held coating-dispensing apparatus
CH623489A5 (en) * 1977-12-08 1981-06-15 Gema Ag
FR2424068A1 (en) * 1978-04-28 1979-11-23 Wagner J Ag ELECTROSTATIC SPRAY GUN
US4266262A (en) * 1979-06-29 1981-05-05 Binks Manufacturing Company Voltage controlled power supply for electrostatic coating apparatus
US4323947A (en) * 1979-08-13 1982-04-06 J. Wagner Ag. Electrostatic gun with improved diode-capacitor multiplier
IT1137200B (en) * 1980-07-10 1986-09-03 Roederstein Ernst Spezialfabri MANUAL APPLIANCE FOR THE ELECTROSTATIC FLOCKING OF OBJECTS
US4441656A (en) * 1982-01-29 1984-04-10 J. Wagner Ag Electrostatic disabling switch for electrostatic spray guns
FR2522991A1 (en) * 1982-03-08 1983-09-16 G2M Lepetit Pneumatic liquid atomising spray - discharges pulviersation air round discharge orifice to form mixture of liquid and air
DE3214314A1 (en) * 1982-04-19 1983-10-20 J. Wagner AG, 9450 Altstätten ELECTROSTATIC SPRAYER
US4554622A (en) * 1983-09-22 1985-11-19 Graco Inc Compact voltage multiplier for spray guns
DE3412266A1 (en) * 1984-04-02 1985-10-03 J. Wagner AG, Altstätten ELECTROSTATIC PAINT SPRAY GUN
DE3412507A1 (en) * 1984-04-03 1985-10-17 J. Wagner AG, Altstätten ELECTROSTATIC HAND SPRAY GUN
FR2587919B1 (en) * 1985-10-02 1988-05-27 Sames Sa ELECTROSTATIC PROJECTION APPARATUS PROTECTED AGAINST ELECTRIC ARC
DE3545885C1 (en) * 1985-12-23 1993-03-04 Kopperschmidt Mueller & Co Electrostatic spray gun
DE3644840A1 (en) * 1986-04-04 1987-10-15 Wagner Int ELECTROSTATIC POWDER SPRAY GUN
FR2618618A1 (en) * 1987-07-20 1989-01-27 Gema Ransburg Ag SPRAY COATING DEVICE WITH PHASE SYNCHRONIZATION OF THE ALTERNATIVE VOLTAGE APPLIED TO ITS TRANSFORMER, AND OF THE CURRENT FLOWING THEREIN
DE3921213C1 (en) * 1989-06-28 1990-11-15 Wagner International Ag, Altstaetten, Ch

Also Published As

Publication number Publication date
US5170315A (en) 1992-12-08
EP0472817A2 (en) 1992-03-04
DE4027078A1 (en) 1992-03-05
JPH04235763A (en) 1992-08-24
DE59106204D1 (en) 1995-09-14
EP0472817A3 (en) 1992-09-02

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