EP0923500B1 - Method and device for electrostatic charging - Google Patents
Method and device for electrostatic charging Download PDFInfo
- Publication number
- EP0923500B1 EP0923500B1 EP97950196A EP97950196A EP0923500B1 EP 0923500 B1 EP0923500 B1 EP 0923500B1 EP 97950196 A EP97950196 A EP 97950196A EP 97950196 A EP97950196 A EP 97950196A EP 0923500 B1 EP0923500 B1 EP 0923500B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- rollers
- shaft
- web
- gap
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
- B65H2301/513—Modifying electric properties
- B65H2301/5132—Bringing electrostatic charge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/14—Roller pairs
- B65H2404/145—Roller pairs other
- B65H2404/1451—Pressure
Definitions
- the invention relates to a device for electrostatically charging the two outer sides of at least one material web with loads opposite polarity according to the generic term of Besides claims.
- Such a generic device is known (EP-A-0 378 350) and discloses an apparatus for electrostatically charging the two outer sides of with at least one slowly transported sheet of material Charge of opposite polarity before Further processing of the at least one sheet, this one through the gap of a pair parallel to each other and with small distance from each other arranged rollers and the device for electrostatic charging is formed by the pair of rollers and wherein electrostatic charging of the outer peripheral area the rolls each roll to a high voltage source can be connected.
- the exact structure of the rollers not disclosed, however, the possibility of Circumferential area to charge.
- rollers whose outer circumferential areas are electrostatically chargeable by induction and are used for Serve sheets of material, known (US-A-3 773 234).
- the invention has for its object a Generic device according to the preamble of Propose subsidiary claims, by means of which a more targeted Charging with better efficiency is possible.
- the generic device charging by that formed by the pair of rollers Device in the first subject of the invention of performed inside, with each roller over one Steel jacket a limited electrically conductive (so-called semiconducting) covering and to electrical charging of the limited conductive coating Steel jacket of each roller to a positive or negative High voltage source can be connected.
- a limited electrically conductive (so-called semiconducting) covering and to electrical charging of the limited conductive coating Steel jacket of each roller to a positive or negative High voltage source can be connected.
- the device according to the invention is because of the supply of Tension from the inside, especially afterwards Installation in existing systems for processing especially endless and fast moving material webs, preferably made of plastic or paper with a High voltage source possible at 3 to 7 kV.
- the axis or shaft of the roller is electrically conductive with the Steel jacket connected and from the machine frame for the Electrically insulated roller.
- the conductive coating becomes limited High voltage is applied to the axis or shaft leading to this Purpose has a connection. This can either be a fixed connection on the axis or as one on the Front side of the shaft to be arranged thrust bearing his.
- Each of the two rollers 5 according to FIG. 1 has one fixed axis 6 in the first embodiment according to Fig. 1 and a steel jacket 7, on the total designated 8, limited conductive coating as Surface is arranged, which is electrically chargeable is. Between the axis 6 and the steel jacket 7 is a provided with a total of 9 designated ball bearings. Between the two arranged parallel to each other There is a gap 50 between the rollers.
- the axis of the roller 5 is 10 in total designated machine stand in a total of 11 designated electrical insulation stored.
- the Distances 12 and 13 are sufficient to discharge or To prevent voltage flashovers.
- the end face 16 of the axis 6 is with a total 15 designated generator and a measuring device 16 with connected to a terminal 17, which to the terminal 17 leading line is grounded via a resistor 18.
- the machine stand 10 is, as schematically with 19 designated, also grounded.
- the shaft 20 from the machine stand 10 is either via an electrically insulating ball bearing 22 or separate insulation 11 connected. It is also possible, to use a normal, electrically conductive ball bearing and between this and the machine stand 10 one to provide electrically insulating sleeve 11.
- the further, third embodiment according to FIG. 3 has also two rollers to form a gap, from but only one for the sake of a better overview Roll up like those in Figs. 1 and 2 are described. It is also concentric to Wave 6 of the roller 5 next to this on one end face 112 a first designated 113 overall Recording device as a magnetizable core with a Secondary coil 114 and a second secondary coil 115 each arranged concentrically to the shaft 6.
- the receiving device 116 is by means of a Pin 119, which in a with respect to the machine frame fixed anchoring 120 engages with respect to shaft 6 rotatable and has an overall on the inside 121 designated ball bearing, so that this is can rotate, but the magnetizable core due to the Pin 119 and the anchor 120 with respect to the first Recording device 113 can be held non-rotatably.
- a rectifier circuit 122 On the secondary side of the first receiving device 113 is also a rectifier circuit 122 and a Smoothing circuit 123 provided with its output is connected to the limited conductive coating 8.
- the electrical connection 2 of the primary coil 117 is grounded, whereas the electrical connection 1 to one AC voltage generator can be connected.
- the two electrical connections 3 and 4 of the second primary coil 118 are connected to the inputs of a control circuit connectable, which is the size of the output voltage and / or their frequency - in a manner known per se - can change.
- the secondary coil 114 is grounded on one side. The same applies to the second secondary coil 115. Both Secondary coils 114, 115 are connected in parallel. Both Coil is first the rectifier circuit 122 for Rectifying the AC downstream. Behind the Rectifier circuit 122 is smoothing circuit 123, e.g. in the form of an LC filter, as is known per se, arranged. The output of the smoothing circuit 123 is with the limited conductive steel jacket 7 of the roller 5 connected.
- the secondary coil 114 against the Primary coil 117 moves. Over the air gap between the two magnetizable cores of the holding device 113 and 116 can therefore the AC voltage of the primary coil 117 induce a secondary voltage in the secondary coil 114, which are rectified via the rectifier circuit 122 and the smoothing circuit 123 directly smoothes that limited conductive coating 8 is supplied.
- the induced voltage of the secondary coil 114 is determined by the second secondary coil 115 removed and onto the second Primary coil 118 in the opposite sense induced with their electrical connections 3 and 4 to one Control circuit is connectable, which the Can control AC voltage source such that at the limited conductive coating 8 of the roller 5 always the same DC voltage is present.
Landscapes
- Elimination Of Static Electricity (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Treatment Of Fiber Materials (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum elektrostatischen Aufladen der beiden Außenseiten von zumindest einer Materialbahn mit Ladungen entgegengesetzter Polarität gemäß dem Oberbegriff der Nebenansprüche.The invention relates to a device for electrostatically charging the two outer sides of at least one material web with loads opposite polarity according to the generic term of Besides claims.
Eine solche gattungsgemäße Vorrichtung ist bekannt (EP-A-0 378 350) und offenbart eine Vorrichtung zum elektrostatischen Aufladen der beiden Außenseiten von zumindest einem langsam transportierten Materialbogen mit Ladung entgegengesetzter Polarität vor dem Weiterverarbeiten des zumindest einen Bogens, wobei dieser durch den Spalt eines Paars zueinander parallel und mit geringem Abstand zueinander angeordneter Walzen geführt ist, und die Vorrichtung zum elektrostatischen Aufladen von dem Paar Walzen gebildet ist und wobei zum elektrostatischen Aufladen des äußeren Umfangsbereiches der Walzen jede Walze an eine Hochspannungsquelle anschließbar ist. Dabei ist der genaue Aufbau der Walzen nicht offenbart, jedoch die Möglichkeit, deren Umfangsbereich aufzuladen.Such a generic device is known (EP-A-0 378 350) and discloses an apparatus for electrostatically charging the two outer sides of with at least one slowly transported sheet of material Charge of opposite polarity before Further processing of the at least one sheet, this one through the gap of a pair parallel to each other and with small distance from each other arranged rollers and the device for electrostatic charging is formed by the pair of rollers and wherein electrostatic charging of the outer peripheral area the rolls each roll to a high voltage source can be connected. The exact structure of the rollers not disclosed, however, the possibility of Circumferential area to charge.
Es sind weiterhin Walzen, deren äußere Umfangsbereiche durch Induktion eloktrostatisch aufladbar sind und die zum Transport von Materialbögen dienen, bekannt (US-A-3 773 234).There are also rollers whose outer circumferential areas are electrostatically chargeable by induction and are used for Serve sheets of material, known (US-A-3 773 234).
Es ist ferner eine Vorrichtung zum elektrostatischen Aufladen bekannt (DE-31 17 419 A1). Hierbei werden mehrere endlose, schnell laufende Materialbahnen zu einem Strang zusammengeführt und nur die beiden Außenseiten mittels einer als Korona-Aufladeelektroden ausgebildeten Vorrichtung zum elektrostatischen Aufladen nach dem ersten Paar von Walzen mittels einer Hochspannungsquelle von 30 kV aufgeladen.It is also an electrostatic device Charging known (DE-31 17 419 A1). Here are several endless, fast running material webs to one strand merged and only the two outer sides by means of one designed as a corona charging electrode Electrostatic charging device after the first Pair of rollers using a high voltage source of 30 kV charged.
Von Nachteil bei dieser bekannten Vorrichtung ist die räumlich nicht sehr gezielte Aufladung der beiden Außenseiten der Materialbahnen. So vagabundiert ein Größteil der aufgeladenen Teilchen im gesamten Bereich, wo die Aufladung stattfindet. Hieraus resultiert ein schlechter Wirkungsgrad bei der Aufladung. Außerdem besteht die Gefahr, daß bei ungünstigen Umgebungsbedingungen die Korona-Aufladeelektroden verschmutzen und ihren Dienst demzufolge versagen. Der Putzaufwand kann sehr beträchtlich sein.The disadvantage of this known device is that spatially not very targeted charging of the two Outside of the material webs. So vagabonded Most of the charged particles in the entire area where the charging takes place. This results in a poor charging efficiency. Moreover there is a risk that with unfavorable Ambient conditions the corona charging electrodes pollute and consequently fail to serve. The Cleaning effort can be very considerable.
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung gemäß dem Oberbegriff der Nebenansprüche vorzuschlagen, mittels der ein gezielteres Aufladen mit besserem Wirkungsgrad möglich ist.The invention has for its object a Generic device according to the preamble of Propose subsidiary claims, by means of which a more targeted Charging with better efficiency is possible.
Diese Aufgabe wird bei der gattungsgemäßen Vorrichtung erfindungsgemäß durch die Gegenstände der beiden Nebenansprüche gelöst.This task is carried out in the generic device according to the objects of the two according to the invention Ancillary claims resolved.
Bei der gattungsgemäßen Vorrichtung wird erfindungsgemäß die Aufladung durch die von dem Paar Walzen gebildete Vorrichtung bei dem ersten Gegenstand der Erfindung von innen her durchgeführt, wobei jede Walze über einem Stahlmantel einen begrenzt elektrisch leitfähigen (sogenannten halbleitenden) Belag aufweist und -zum elektrischen Aufladen des begrenzt leitfähigen Belags- der Stahlmantel jeder Walze an eine positive bzw. negative Hochspannungsquelle anschließbar ist. Bei der erfindungsgemäßen Vorrichtung ist wegen der Zuführung der Spannung von innen her auch insbesondere der nachträgliche Einbau in vorhandenen Anlagen zur Verarbeitung von insbesondere endlosen und schnell bewegten Materialbahnen, vorzugsweise aus Kunststoff oder Papier mit einer Hochspannungsquelle bei 3 bis 7 kV möglich. Somit wird auch mit Bezug auf den Stand der Technik mit beträchtlich geringeren Spannungen gearbeitet. Außerdem erfolgt die Aufladung genau an jener aufzuladenden Stelle, nämlich an den Außenseiten der zumindest einen Materialbahn, wodurch sich ein im Vergleich zum Stand der Technik erheblich besserer Wirkungsgrad ergibt. Schließlich ist wegen des Fortfalls von Korona-Aufladeelektroden ein Reinigungsaufwand für diese vollständig entbehrlich, so daß sich auch im Betrieb geringere Kosten wegen Stillstandzeiten der Anlage ergeben.In the generic device is according to the invention charging by that formed by the pair of rollers Device in the first subject of the invention of performed inside, with each roller over one Steel jacket a limited electrically conductive (so-called semiconducting) covering and to electrical charging of the limited conductive coating Steel jacket of each roller to a positive or negative High voltage source can be connected. In the device according to the invention is because of the supply of Tension from the inside, especially afterwards Installation in existing systems for processing especially endless and fast moving material webs, preferably made of plastic or paper with a High voltage source possible at 3 to 7 kV. Thus also with respect to the prior art with considerable lower voltages worked. In addition, the Charge exactly at that point to be charged, namely at the outer sides of the at least one material web, whereby compared to the prior art results in better efficiency. After all, because of that Eliminate corona charging electrodes Cleaning effort for this completely unnecessary, so that there are also lower costs in operation System downtimes result.
Zweckmäßig ist bei diesem ersten Gegenstand der Erfindung die Achse oder Welle der Walze elektrisch leitend mit dem Stahlmantel verbunden und von dem Maschinenrahmen für die Walze elektrisch isoliert. Zum elektrischen Aufladen des begrenzt leitfähigen Belages wird die elektrische Hochspannung an die Achse oder Welle gelegt, die zu diesem Zweck einen Anschluß aufweist. Dieser kann entweder ein fester Anschluß an der Achse oder als ein an der Stirnseite der Welle anzuordnendes Drucklager ausgebildet sein. In this first subject of the invention is expedient the axis or shaft of the roller is electrically conductive with the Steel jacket connected and from the machine frame for the Electrically insulated roller. For electrically charging the the conductive coating becomes limited High voltage is applied to the axis or shaft leading to this Purpose has a connection. This can either be a fixed connection on the axis or as one on the Front side of the shaft to be arranged thrust bearing his.
Bei dem alternativen Gegenstand der Erfindung ist es auch möglich, daß konzentrisch zu der Achse oder Welle der Walze neben dieser eine Primärspule bezüglich des Maschinenrahmens fest und konzentrisch zu der Achse oder Welle der Walze an dessen einer Stirnseite eine Sekundärspule mit dieser umlaufend fest angebracht ist und daß deren einer Anschluß an die Achse oder Welle und deren anderer Anschluß über eine Gleichrichterschaltung an dem Stahlmantel angeschlossen ist.The alternative subject of the invention is also possible that concentric to the axis or shaft of the Roll a primary coil next to this with respect to the Machine frame fixed and concentric to the axis or Shaft of the roller on one end face Secondary coil with this all around is firmly attached that their a connection to the axis or shaft and their another connection via a rectifier circuit to the Steel jacket is connected.
Weitere Ausgestaltungen des alternativen Gegenstandes der Erfindung sind in den restlichen Unteransprüchen gekennzeichnet.Further refinements of the alternative subject of Invention are in the remaining subclaims characterized.
Drei Ausführungsbeispiele der Erfindung werden nachfolgend unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigt:
- Figur 1
- eine erste Ausführungsform der erfindungsgemäßen Vorrichtung, im schematischen Querschnitt und teilweise abgebrochener Darstellung;
- Figur 2
- eine zweite Ausführungsform der erfindungsgemäßen Vorrichtung, im schematischen Querschnitt und teilweise abgebrochener vereinfachter Darstellung; und
- Figur 3
- eine dritte Ausführungsform der erfindungsgemäßen Vorrichtung, in teilweise ab- und ausgebrochener vereinfachter Darstellung.
- Figure 1
- a first embodiment of the device according to the invention, in schematic cross section and partially broken representation;
- Figure 2
- a second embodiment of the device according to the invention, in schematic cross section and partially broken simplified representation; and
- Figure 3
- a third embodiment of the device according to the invention, in a partially broken away and broken out simplified representation.
Jede der beiden Walzen 5 gemäß Fig. 1 weist eine
feststehende Achse 6 in der ersten Ausführungsform gemäß
Fig. 1 sowie einen Stahlmantel 7 auf, über dem insgesamt
mit 8 bezeichneter, begrenzt leitfähiger Belag als
Oberfläche angeordnet ist, welcher elektrisch aufladbar
ist. Zwischen der Achse 6 und dem Stahlmantel 7 ist ein
insgesamt mit 9 bezeichnetes Kugellager vorgesehen.
Zwischen den beiden parallel zueinander angeordneten
Walzen ist ein Spalt 50 vorhanden.Each of the two
Die Achse der Walze 5 ist in einem insgesamt mit 10
bezeichneten Maschinenständer in einer insgesamt mit 11
bezeichneten elektrischen Isolierung gelagert. Die
Abstände 12 und 13 sind ausreichend, um Entladungen oder
Spannungsüberschläge zu verhindern.The axis of the
Die Stirnseite 16 der Achse 6 ist mit einem insgesamt mit
15 bezeichneten Generator und einer Meßeinrichtung 16 mit
einem Anschluß 17 angeschlossen, wobei die zu dem Anschluß
17 führende Leitung über einen Widerstand 18 geerdet ist.
Der Maschinenständer 10 ist, wie schematisch mit 19
bezeichnet, ebenfalls geerdet.The
Das Ausführungsbeispiel gemäß Fig. 2 unterscheidet sich
von jenem gemäß Fig. 1, als nur eine der beiden Walzen
gezeigt und die dortige Achse 6 nunmehr als Welle 20
ausgebildet ist, die starr über ein elektrisch leitendes
Zwischenstück 21 mit dem Stahlmantel 7 verbunden ist.2 differs
of that according to FIG. 1, as only one of the two rollers
shown and the
Dafür ist die Welle 20 vom Maschinenständer 10 entweder
über ein elektrisch isolierendes Kugellager 22 oder eine
gesonderte Isolierung 11 verbunden. Es ist auch möglich,
ein normales, elektrisch leitendes Kugellager zu verwenden
und zwischen diesem und dem Maschinenständer 10 eine
elektrisch isolierende Hülse 11 vorzusehen.For this, the shaft 20 from the
Ferner ist an der Stirnseite 14 der Welle 20 ein insgesamt
mit 23 bezeichnetes Drucklager als Anschluß vorgesehen,
welches elektrisch leitend ist und an dessen Außenseite
der Anschluß 17 des Hochspannungsgenerators 15 über die
Meßeinrichtung 16 angebracht ist.Furthermore, there is a total on the
Bei beiden Ausführungsformen gemäß Fig. 1 und 2 ist
sichergestellt, daß die über die Achse 6 oder Welle 20
angelegte Hochspannung einerseits nicht in den
Maschinenraum 10 wegen der elektrischen Isolierung 11
gelangen kann, andererseits die Hochspannung auf den
begrenzt leitfähigen Belag 8 der Walze 5 von innen her
gelangen kann.In both embodiments according to FIGS. 1 and 2
ensures that the
Die weitere, dritte Ausführungsform gemäß Fig. 3 weist
auch zwei Walzen unter Bildung eines Spaltes auf, von
denen aber aus Gründen der besseren Übersicht nur eine
Walze wie jene auf, wie sie in den Fig. 1 und 2
beschrieben sind, gezeigt ist. Ferner ist konzentrisch zur
Welle 6 der Walze 5 neben dieser auf der einen Stirnseite
112 eine insgesamt mit 113 bezeichnete erste
Aufnahmevorrichtung als magnetisierbarer Kern mit einer
Sekundärspule 114 sowie eine zweite Sekundärspule 115
jeweils konzentrisch zur Welle 6 angeordnet.The further, third embodiment according to FIG. 3 has
also two rollers to form a gap, from
but only one for the sake of a better overview
Roll up like those in Figs. 1 and 2
are described. It is also concentric to
Konzentrisch zu der Welle 6 ist eine weitere
Aufnahmevorrichtung 116 als magnetisierbarer Kern zur
Aufnahme einer ebenfalls zur Welle 6 konzentrischen
Primärspule 117 mit elektrischen Anschlüssen 1 und 2 sowie
eine zwischen dieser und der Welle 6 angeordneten zweiten
Primärspule 18 mit elektrischen Anschlüssen 3 und 4
angeordnet. Die Aufnahmevorrichtung 116 ist mittels eines
Zapfens 119, der in eine bezüglich des Maschinenrahmens
feste Verankerung 120 eingreift, bezüglich der Welle 6
drehbar und weist auf seiner Innenseite ein insgesamt mit
121 bezeichnetes Kugellager auf, so daß sich diese zwar
drehen kann, der magnetisierbare Kern jedoch infolge des
Zapfens 119 und der Verankerung 120 bezüglich der ersten
Aufnahmeeinrichtung 113 drehfest gehalten werden kann.Another is concentric to the
Auf der Sekundärseite der ersten Aufnahmevorrichtung 113
ist ferner noch eine Gleichrichterschaltung 122 sowie eine
Glättungsschaltung 123 vorgesehen, die mit ihrem Ausgang
mit dem begrenzt leitfähigen Belag 8 verbunden ist.On the secondary side of the
Der elektrische Anschluß 2 der Primärspule 117 ist
geerdet, wohingegen der elektrische Anschluß 1 an einen
Wechselspannungsgenerator anschließbar ist. Die beiden
elektrischen Anschlüsse 3 und 4 der zweiten Primärspule
118 sind an die Eingänge einer Regelschaltung
anschließbar, welche die Größe der Ausgangsspannung
und/oder deren Frequenz - in ansich bekannter Weise -
ändern kann.The electrical connection 2 of the
Die Sekundärspule 114 ist mit ihrer einen Seite geerdet.
Dasselbe gilt auch für die zweite Sekundärspule 115. Beide
Sekundärspulen 114, 115 sind parallel geschaltet. Beiden
Spulen ist zunächst die Gleichrichterschaltung 122 zum
Gleichrichten des Wechselstromes nachgeordnet. Hinter der
Gleichrichterschaltung 122 ist die Glättungsschaltung 123,
z.B. in Form eines LC-Filters, wie ansich bekannt,
angeordnet. Der Ausgang der Glättungsschaltung 123 ist mit
dem begrenzt leitfähigen stahlmantel 7 der Walze 5 verbunden.The
Im Betrieb werden die Sekundärspule 114 gegenüber der
Primärspule 117 bewegt. Über den Luftspalt zwischen den
beiden magnetisierbaren Kernen der Aufnahmevorrichtung 113
und 116 kann also die Wechselspannung der Primärspule 117
eine Sekundärspannung in der Sekundärspule 114 induzieren,
die über die Gleichrichterschaltung 122 gleichgerichtet
und die Glättungsschaltung 123 geglättet direkt dem
begrenzt leitfähigen Belag 8 zugeführt wird. Die
induzierte Spannung der Sekundärspule 114 wird durch die
zweite Sekundärspule 115 abgenommen und auf die zweite
Primärspule 118 im umgekehrten Sinne induziert, die mit
ihren elektrischen Anschlüssen 3 und 4 an eine
Regelschaltung anschließbar ist, welche die
Wechselspannungsquelle dergestalt steuern kann, daß an dem
begrenzt leitfähigen Belag 8 der Walze 5 stets die gleiche
Gleichspannung anliegt.In operation, the
Claims (5)
- Apparatus for the electrostatic charging of the two outward sides of at least one web of material with charges of opposite polarity, before further processing of the at least one web of material, wherein same is guided through the gap of a pair of rollers (5) which are arranged parallel to each other and at a small spacing from each other, where the electrostatic charging apparatus is formed by the pair of rollers (5), characterised in that each roller has over an outer steel shell a limitedly electrically conductive covering (8), that for electrical charging of the limitedly conductive covering in the gap (50) the steel shell (7) of each roller (5) is connectable to a positive or negative high-voltage source, that the roller (5) which is provided with a spindle (6) or a shaft (20) is arranged in a machine frame (10), that the spindle (6) or the shaft (20) of the roller (5) is connected by an electrically conducting bearing to the steel shell (7) and electrically insulated from the machine frame (10), that the size of the gap (50) between the rollers (5) is adjustable and that the rollers (5) are pressed with an adjustable force against the two outward sides of the at least one web of material.
- Apparatus according to claim 1 characterised in that the electrical high voltage can be applied by way of a connection which is in the form of a thrust bearing (23) arranged at the end (14) of the shaft (20).
- Apparatus for the electrostatic charging of the two outward sides of at least one web of material with charges of opposite polarity, before further processing of the at least one web of material, wherein same is guided through the gap of a pair of rollers (5) which are arranged parallel to each other and at a small spacing from each other, where the electrostatic charging apparatus is formed by the pair of rollers (5), characterised in that each roller has over an outer steel shell a limitedly electrically conductive covering (8), that for electrical charging of the limitedly conductive covering in the gap (50) the steel shell (7) of each roller (5) is connectable to a positive or negative high-voltage source, that a primary coil (117) is arranged fixedly with respect to the machine frame (10, 120) concentrically with respect to the spindle or shaft (6) of the roller (5) beside same, that a secondary coil (114) is arranged fixedly rotating with the roller (5) concentrically with respect to the spindle or shaft (6) of the roller (5) at the one end (112) thereof, that a connection thereof is connected to the spindle or shaft (6) and the connection thereof is connected by way of a rectifier circuit (122) to the steel shell (7) (8), and that the size of the gap (50) between the rollers (5) is adjustable and that the rollers (5) are pressed with an adjustable force against the two outward sides of the at least one web of material.
- Apparatus according to claim 3 characterised in that a smoothing circuit (123) for the pulsating direct current is arranged between the rectifier circuit (122) and the limitedly conductive covering (8).
- Apparatus according to claim 3 or claim 4 characterised in that associated with the primary coil (117) is a second primary coil (118) and associated with the secondary coil (114) is a second secondary coil (115) which rotates therewith and which is connected in parallel therewith and which is in opposite relationship to the second primary coil (118).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19713662 | 1997-04-02 | ||
| DE19713662A DE19713662A1 (en) | 1997-04-02 | 1997-04-02 | Method and device for electrostatic charging |
| PCT/EP1997/006387 WO1998043904A1 (en) | 1997-04-02 | 1997-11-16 | Method and device for electrostatic charging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0923500A1 EP0923500A1 (en) | 1999-06-23 |
| EP0923500B1 true EP0923500B1 (en) | 2002-08-14 |
Family
ID=7825271
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97950196A Expired - Lifetime EP0923500B1 (en) | 1997-04-02 | 1997-11-16 | Method and device for electrostatic charging |
| EP98917100A Revoked EP0971851B1 (en) | 1997-04-02 | 1998-03-31 | Device for electrostatic charging |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98917100A Revoked EP0971851B1 (en) | 1997-04-02 | 1998-03-31 | Device for electrostatic charging |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US6159555A (en) |
| EP (2) | EP0923500B1 (en) |
| JP (2) | JP3258034B2 (en) |
| AT (2) | ATE222210T1 (en) |
| AU (2) | AU736011B2 (en) |
| DE (4) | DE29723999U1 (en) |
| DK (1) | DK0971851T3 (en) |
| ES (2) | ES2181044T3 (en) |
| WO (2) | WO1998043904A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29723999U1 (en) * | 1997-04-02 | 1999-12-09 | Eltex Elektrostatik Gmbh | Electrostatic charging device |
| DE19716325C2 (en) | 1997-04-18 | 2001-04-26 | Koenig & Bauer Ag | Device for electrostatically charging a multi-layer strand |
| DE19860034A1 (en) * | 1998-12-23 | 2000-06-29 | Sebald U E | Method and device for producing a folded printed product |
| DE50007814D1 (en) | 1999-03-19 | 2004-10-21 | Koenig & Bauer Ag | ROLLERS FOR GUIDING PAPER RAILS |
| DE20101202U1 (en) * | 2000-05-16 | 2001-05-10 | Spengler Electronic Ag Biel Be | Device for combining at least two paper webs into one paper strand |
| DE10043211A1 (en) | 2000-09-01 | 2002-03-14 | Heidelberger Druckmasch Ag | Electrostatic charge applicator, used for multi-layer strip passing through printing machine, comprises roller surfaces and cutters electrically insulated |
| DE10214867A1 (en) * | 2002-04-04 | 2003-10-16 | Mitex Gummifabrik Hans Knott G | A method for discharging static electricity from metal rotating drums has the bearing(s) insulated and a slip ring and brush having low resistance. |
| DE10305606A1 (en) * | 2003-02-11 | 2004-08-19 | Voith Paper Patent Gmbh | Machine used in the manufacture of paper and cardboard comprises a drying arrangement consisting of a drying cylinder, a rolling unit lying in the running direction of the machine and a transfer belt for transferring a fibrous strip |
| DE102004032067A1 (en) * | 2004-07-01 | 2006-01-19 | Eltex-Elektrostatik Gmbh | winder |
| FR2883267B1 (en) * | 2005-03-18 | 2007-06-08 | Thibeau Soc Par Actions Simpli | METHOD AND SYSTEM FOR TRANSPORTING A NON-WOVEN STRIP WITH ELECTROSTATIC RETENTION IN AT LEAST ONE AREA OF SIZE LESS THAN THE WIDTH OF SAID STRIP |
| US8559156B2 (en) | 2008-06-03 | 2013-10-15 | Illinois Tool Works Inc. | Method and apparatus for charging or neutralizing an object using a charged piece of conductive plastic |
| US8743526B2 (en) * | 2011-03-04 | 2014-06-03 | Victor Mayorkis | Electrostatic roller apparatus and a system for electrostatically supporting an object |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1311673A (en) * | 1969-03-12 | 1973-03-28 | Masson Scott Thrissell Eng Ltd | Methods and apparatus for electrostatic printing or copying |
| US3773234A (en) * | 1971-12-27 | 1973-11-20 | Iwatsu Electric Co Ltd | Apparatus for supply of electro-insulating sheet |
| US3876917A (en) * | 1973-03-26 | 1975-04-08 | Bell & Howell Co | Electrostatic charging apparatus |
| US4056314A (en) * | 1976-06-04 | 1977-11-01 | Xerox Corporation | Liquid ink imaging system |
| DE2754179C2 (en) * | 1977-12-06 | 1984-09-20 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | A processing station with a web guiding device connected downstream of a web-fed rotary printing press |
| CH659035A5 (en) * | 1980-05-06 | 1986-12-31 | Walter Spengler | METHOD FOR GATHERING BUNCHES OF ELECTRICALLY INSULATING BOW-SHAPED SUBSTRATE MATERIALS FOLDED. |
| JPS62244860A (en) * | 1986-04-15 | 1987-10-26 | Inahata Kenkyusho:Kk | Electrostatic adsorption roll device |
| JPH0237835A (en) * | 1988-07-27 | 1990-02-07 | Fujitsu Ltd | Circuit and method for adjusting rise and fall time |
| JPH02185498A (en) * | 1989-01-13 | 1990-07-19 | Abisare:Kk | Method and apparatus for holding drawing paper of plotter |
| JPH0465088A (en) * | 1990-07-03 | 1992-03-02 | Fuji Photo Film Co Ltd | Web electrifying device |
| FR2667267A1 (en) * | 1990-09-27 | 1992-04-03 | Mira Sarl | Electrostatic assistance device for the design of book sections, exercise books or the like |
| JPH0786727B2 (en) * | 1991-05-14 | 1995-09-20 | 富士ゼロックス株式会社 | Recording sheet transport device |
| FR2677301B1 (en) * | 1991-06-05 | 1993-12-24 | Mira Sarl | ELECTROSTATIC ASSISTANCE DEVICE FOR A PRINTING MACHINE ESPECIALLY HELIOGRAVURE. |
| US5369424A (en) * | 1991-06-06 | 1994-11-29 | Mita Industrial Co., Ltd. | Image-forming apparatus |
| US5142759A (en) * | 1991-08-27 | 1992-09-01 | Beloit Corporation | Roll cover apparatus |
| DE9218818U1 (en) * | 1992-02-18 | 1995-08-31 | Eltex-Elektrostatik Gmbh, 79576 Weil Am Rhein | Impressionist |
| DE9400931U1 (en) * | 1994-01-20 | 1994-03-17 | Dettke, Christa, 22946 Trittau | Device for the electrostatic fixing of a multilayer flat material |
| DE9419540U1 (en) * | 1994-12-06 | 1995-01-26 | Pogatzki, Volkmar W., Dr., 21039 Börnsen | Rotogravure printing unit with pressurized pressurizer |
| KR19980702975A (en) * | 1995-03-15 | 1998-09-05 | 애브리데니슨코포레이션 | Web feeder with controlled electrostatic force and its method |
| DE29517139U1 (en) * | 1995-10-27 | 1995-12-21 | Dettke, Christa, 22946 Trittau | Device for the electrostatic fixing of a multi-layer flat material |
| DE29723999U1 (en) * | 1997-04-02 | 1999-12-09 | Eltex Elektrostatik Gmbh | Electrostatic charging device |
-
1997
- 1997-04-02 DE DE29723999U patent/DE29723999U1/en not_active Expired - Lifetime
- 1997-04-02 DE DE19713662A patent/DE19713662A1/en not_active Withdrawn
- 1997-11-16 DE DE59707978T patent/DE59707978D1/en not_active Expired - Lifetime
- 1997-11-16 WO PCT/EP1997/006387 patent/WO1998043904A1/en active IP Right Grant
- 1997-11-16 ES ES97950196T patent/ES2181044T3/en not_active Expired - Lifetime
- 1997-11-16 JP JP53808798A patent/JP3258034B2/en not_active Expired - Fee Related
- 1997-11-16 US US09/142,828 patent/US6159555A/en not_active Expired - Lifetime
- 1997-11-16 AU AU53224/98A patent/AU736011B2/en not_active Ceased
- 1997-11-16 AT AT97950196T patent/ATE222210T1/en active
- 1997-11-16 EP EP97950196A patent/EP0923500B1/en not_active Expired - Lifetime
-
1998
- 1998-03-31 DE DE59802440T patent/DE59802440D1/en not_active Revoked
- 1998-03-31 ES ES98917100T patent/ES2169509T3/en not_active Expired - Lifetime
- 1998-03-31 JP JP54115398A patent/JP3284503B2/en not_active Expired - Fee Related
- 1998-03-31 DK DK98917100T patent/DK0971851T3/en active
- 1998-03-31 US US09/402,253 patent/US6445562B1/en not_active Expired - Fee Related
- 1998-03-31 EP EP98917100A patent/EP0971851B1/en not_active Revoked
- 1998-03-31 AU AU70425/98A patent/AU7042598A/en not_active Abandoned
- 1998-03-31 AT AT98917100T patent/ATE210593T1/en not_active IP Right Cessation
- 1998-03-31 WO PCT/EP1998/001855 patent/WO1998043905A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0923500A1 (en) | 1999-06-23 |
| ES2181044T3 (en) | 2003-02-16 |
| AU5322498A (en) | 1998-10-22 |
| US6159555A (en) | 2000-12-12 |
| ATE222210T1 (en) | 2002-08-15 |
| AU7042598A (en) | 1998-10-22 |
| US6445562B1 (en) | 2002-09-03 |
| WO1998043904A1 (en) | 1998-10-08 |
| EP0971851B1 (en) | 2001-12-12 |
| DE59707978D1 (en) | 2002-09-19 |
| JP2000505032A (en) | 2000-04-25 |
| JP3284503B2 (en) | 2002-05-20 |
| DE29723999U1 (en) | 1999-12-09 |
| DK0971851T3 (en) | 2002-04-08 |
| DE59802440D1 (en) | 2002-01-24 |
| WO1998043905A1 (en) | 1998-10-08 |
| ES2169509T3 (en) | 2002-07-01 |
| JP2000509697A (en) | 2000-08-02 |
| DE19713662A1 (en) | 1998-10-08 |
| AU736011B2 (en) | 2001-07-26 |
| JP3258034B2 (en) | 2002-02-18 |
| EP0971851A1 (en) | 2000-01-19 |
| ATE210593T1 (en) | 2001-12-15 |
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