DE2166948B2 - Corona discharger with a shield case - Google Patents

Corona discharger with a shield case

Info

Publication number
DE2166948B2
DE2166948B2 DE2166948A DE2166948A DE2166948B2 DE 2166948 B2 DE2166948 B2 DE 2166948B2 DE 2166948 A DE2166948 A DE 2166948A DE 2166948 A DE2166948 A DE 2166948A DE 2166948 B2 DE2166948 B2 DE 2166948B2
Authority
DE
Germany
Prior art keywords
corona discharger
discharge
discharge wire
corona
shielding housing
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.)
Granted
Application number
DE2166948A
Other languages
German (de)
Other versions
DE2166948C3 (en
DE2166948A1 (en
Inventor
Yoshio Kokubinji Tokyo Ito
Hajime Katayama
Hiroshi Tokyo Nitanda
Masaru Yokohama Kanagawa Yamaguchi
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.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP45020075A external-priority patent/JPS5029651B1/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of DE2166948A1 publication Critical patent/DE2166948A1/en
Publication of DE2166948B2 publication Critical patent/DE2166948B2/en
Application granted granted Critical
Publication of DE2166948C3 publication Critical patent/DE2166948C3/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1604—Arrangement or disposition of the entire apparatus
    • G03G21/1623—Means to access the interior of the apparatus
    • G03G21/1628—Clamshell type
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/1642—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements for connecting the different parts of the apparatus
    • G03G21/1647—Mechanical connection means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1606—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the photosensitive element
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1618—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1618—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit
    • G03G2221/1624—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit transporting cleaned toner into separate vessels, e.g. photoreceptors, external containers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/163—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the developer unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1636—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the exposure unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1654—Locks and means for positioning or alignment
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1651—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts
    • G03G2221/1657—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for connecting the different parts transmitting mechanical drive power
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/1672—Paper handling
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Fixing For Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Electrophotography Configuration And Component (AREA)

Description

Die Erfindung bezieht sich auf einen Koronaentlader gemäß dem Oberbegriff des Patentanspruchs.The invention relates to a corona discharger according to the preamble of the patent claim.

Bei einem in der US-PS 29 22 883 beschriebenen bekannten Koronaentlader dieser Art ist ein Halterungsrahmen vorgesehen, in den drei Entladungsdrähte über Spannfedern eingespannt sind. Dieser Halterungsrahmen ist nun seinerseits zwischen Seitenwänden des Abschirmgehäuses befestigt, und zwar mittels Befestigungsschrauben, die durch Schlitze in den Seitenwänden hindurchgreifen. Zur Einstellung des Abstandes zwischen den Entladungsdrähten und einem an ihnen vorbeigeführten blattförmigen Material müssen sämtliche Befestigungsschrauben gelöst, der Halterungsrahmen anschließend entsprechend justiert und die Befestigungsschrauben sodann wieder angezogen werden. Diese Art der Einstellung ist zeitraubend und aufwendig und erlaubt keine Feinjustierung.In a known corona discharger of this type described in US Pat. No. 2,922,883, a support frame is provided provided, in which three discharge wires are clamped via tension springs. This mounting frame is now in turn fastened between the side walls of the shielding housing, by means of fastening screws, which reach through slots in the side walls. To set the distance between the discharge wires and a sheet-like material guided past them must all Loosened the fastening screws, then adjusted the mounting frame accordingly and the Fixing screws are then tightened again. This type of setting is time consuming and complex and does not allow fine adjustment.

Aus der US-PS 28 82 412 ist es bekannt, bei einem Koronaentlader den Abstand einer stangenförmigen Elektrodenanordnung zu einer gegenüberliegend angeordneten geerdeten Walze über zwei Winkeleisen einzustellen, die jeweils über eine Stell- und Befestigungsschraubenanordnung mit einer Halterung verbunden sind. Die Abstandseinstellung erfolgt, indem zunächst an jedem Winkeleisen zwei Befestigungsschrauben gelöst und sodann zwei Stellschrauben zur Erzielung einer Stellbewegung des jeweiligen Winkeleisens entsprechend verstellt werden, woraufhin die Befestigungsschrauben wieder angezogen werden müssen. Allein zur Vornahme dieser Abstandsjustierung der Elektrodenanordnung sind somit acht Schrauben, nämlich jeweils vier in jedem Winkeleisen erforderlich. Insbesondere müssen die Stellschrauben für die Abstandseinstellung genau parallel ausgerichtet werden, was ohne Zurhilfenahme weiterer Hilfsmittel wie etwa sogenannter Libellen zur Niveaueinstellung kaum möglich ist Schließlich kann die gesamte Einstellung nur im eingebauten Zustand des Koronaentladers im Gerät vorgenommen werden, was die ohnehin beschwerlichen und zeitraubenden Einstellmaßnahmen weiter verkompliziert From US-PS 28 82 412 it is known, in a corona discharger, the distance of a rod-shaped Electrode arrangement to an oppositely arranged grounded roller over two angle irons set, each connected to a bracket via an adjusting and fastening screw arrangement are. The distance is adjusted by first attaching two fastening screws to each angle iron loosened and then two adjusting screws to achieve an adjusting movement of the respective angle iron adjusted accordingly, whereupon the fastening screws have to be tightened again. Eight screws are therefore required to carry out this distance adjustment of the electrode arrangement alone. namely four required in each angle iron. In particular, the adjusting screws for the Distance adjustment can be aligned exactly parallel, which can be done without the aid of other aids such as for example so-called dragonflies for level adjustment is hardly possible. Finally, the entire adjustment can only can be made in the built-in state of the corona discharger in the device, which is troublesome anyway and time-consuming adjustment measures are further complicated

Der Erfindung liegt die Aufgabe zugrunde, einen Koronaentlader gemäß dem Oberbegriff des Patentanspruchs derart weiterzubilden, daß der Abstand zwischen dem Entladungsdraht und der der Koronaentladung auszusetzenden Fläche auf einfache Weise sehr fein justiert werden kann.The invention is based on the object of a corona discharger according to the preamble of the patent claim to develop in such a way that the distance between the discharge wire and that of the corona discharge exposed surface can be adjusted very finely in a simple manner.

Diese Aufgabe wird erfindungsgemaß mit den im kennzeichnenden Teil des Patentanspruchs angegebenen Mitteln gelöstThis object is achieved according to the invention with those specified in the characterizing part of the patent claim Funds resolved

Erfindungsgemäß wird also von dem bekannten Prinzip, den federgespannten Elektrodendraht in einen Halterungsrahmen einzuspannen und diesen Rahmen justierbar im Abschirmgehäuse zu befestigen, abgegangen und nur das für die Koronaentladung wirksame Elektrodendrahtstück justiert, welches unter der Wirkung der Spannfeder an die Stütz- und Führungseinrichtung angedrückt wird. Durch dieses Zusammenwirken von Spannfeder und Stütz- und Führungseinrichtung erübrigt sich das nach dem Stand der Technik erforderliche Befestigen der ElektrodendrahthalterungAccording to the invention is therefore of the known principle, the spring-loaded electrode wire in a To clamp the mounting frame and to fasten this frame in an adjustable manner in the shielding housing, departed and only the electrode wire effective for the corona discharge adjusted, which is under the effect the tension spring is pressed against the support and guide device. Through this interaction of tension spring and support and guide device is unnecessary according to the prior art required fastening of the electrode wire holder

is nach dem Justieren. Beim Verstellen der Stütz- und Führungseinrichtung durch die Stellschraubenanordnung wird das wirksame Elektrodendrahtstück mehr oder weniger stark ausgelenkt, wobei der Elektrodendraht durch die Spannfeder praktisch unabhängig von dem Maße des Auslenkens unter der gewünschten Spannung gehalten wird. Die Spannfeder dient also nicht nur zum Spannen des Elektrodendrahts, sondern zugleich dazu, eine gewisse Verlängerung der Einheit aus Elektrodendraht und Spannfeder zu Justierzwecken zu ermöglichen, ohne daß die Gefahr besteht, daß der Elektrodendraht reißt.is after adjustment. When adjusting the support and Guide device through the set screw arrangement, the more effective electrode wire piece or less strongly deflected, the electrode wire practically independent of the tension spring the amount of deflection is kept under the desired tension. So the tension spring is used not only for tensioning the electrode wire, but also for a certain extension of the unit to allow from electrode wire and tension spring for adjustment purposes without the risk that the Electrode wire breaks.

Ein weiterer Vorteil des erfindungsgemäßen Koronaentladers liegt darin, daß er beispielsweise bei seiner Anwendung in einem Kopiergerät nach Art einer Kassette in das Gerät einschiebbar und aus dem Gerät heraus ziehbar ausgebildet und mit einem fest am Abschirmgehäuse montierten Anschlußstift versehen sein kann. Dies wird dadurch möglich, daß beim erforderlichen Justieren lediglich auf den Entladungsdraht eingewirkt wird.Another advantage of the corona discharger according to the invention is that it is, for example, in his Use in a copier in the manner of a cassette that can be pushed into and out of the device designed to be pulled out and provided with a terminal pin fixedly mounted on the shielding housing can be. This is made possible by the fact that only the discharge wire is used when the adjustment is required is acted upon.

Die Erfindung wird nachstehend anhand der Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigt
F i g. 1 einen Längsschnitt eines Kopiergeräts,The invention is explained in more detail below on the basis of the description of an exemplary embodiment with reference to the drawing. It shows
F i g. 1 shows a longitudinal section of a copier,

-to F i g. 2 einen Längsschnitt eines Koronaeniladers,
F i g. 3 eine Draufsicht des Koronaentladers und
F i g. 4 einen Schnitt desselben.
Das in F i g. 1 dargestellte elektrofotografische Kopiergerät arbeitet mit einer Trommel 2, auf der ein elektrofotografisches Aufzeichnungsmaterial 1 angeordnet ist. Am Umfang der Trommel 2 sind die für das elektrofotografische Verfahren erforderlichen Einrichtungen, nämlich ein erster Koronaentlader 4, ein Koronaentlader 5, durch den hindurch die bildmäßige Belichtung des Aufzeichnungsmaterials erfolgt, eine Totalbelichtungseinrichtung 6, eine Entwicklungseinrichtung 7, ein dritter Koronaentlader 8, eine Bildübertragungseinrichtung 9 und eine Reinigungseinrichtung 10 in der angegebenen Reihenfolge angeordnet. Eine ins Einzelne gehende Beschreibung der Funktionen dieser Einrichtungen erübrigt sich, da mit Bildübertragung arbeitende elektrofotografische Kopiergeräte dieser Art bekannt sind.-to F i g. 2 a longitudinal section of a corona needle loader,
F i g. 3 is a plan view of the corona discharger and FIG
F i g. 4 shows a section of the same.
The in Fig. The electrophotographic copier shown in FIG. 1 operates with a drum 2 on which an electrophotographic recording material 1 is arranged. On the circumference of the drum 2 are the devices required for the electrophotographic process, namely a first corona discharger 4, a corona discharger 5 through which the image-wise exposure of the recording material takes place, a total exposure device 6, a developing device 7, a third corona discharger 8, an image transfer device 9 and a cleaning device 10 arranged in the specified order. A detailed description of the functions of these devices is unnecessary, since electrophotographic copiers of this type which operate with image transmission are known.

Das Kopiergerät enthält also drei Koronaentlader, deren Konstruktion im einzelnen anhand der F i g. 2 bis 4 beschrieben wird. Der Koronaentlader enthält Entladungsdrähle 400, Abschirmplatten 401 und isolierende Halterungen 402,403. Die isolierenden Halterungen 402,403 sind an den Enden der Abschirmplatten 401 befestigt. An der Halterung 403 ist ein Anschluß 404 für die Verbindung mit einer Hoehspannungsquelle im Gerätegehäuse angebracht. An der Halterung 402 ist ein Griffknopf 405 befestigt. Mittels Stellschrauben 408,409The copier thus contains three corona dischargers, the construction of which is shown in detail on the basis of FIGS. 2 to 4 will be described. The corona discharger includes discharge wires 400, shield plates 401 and insulating brackets 402, 403. The insulating brackets 402, 403 are attached to the ends of the shield plates 401. A connection 404 for connection to a high voltage source in the device housing is attached to the holder 403. A handle button 405 is attached to the holder 402. By means of adjusting screws 408,409

sind an den isolierenden Halterungen 402, 403 verstellbare Stütz- und Führungsteile 406, 407 zum Einstellen der Lage der Entladungsdrähte 400 gehalten. Durch Verdrehen der Stellschrauben 408, 409 lassen sich die Stütz- und Führungsteile 406,407 senkrecht zum Aufzeichnungsmaterial bewegen, um damit den günstigsten Abstand zwischen dem Aufzeichnungsmaterial und den Entladungsdrähten 400 einzustellen. Das Stütz- und Führungsteil 407 ist mit Kerben 410 zur Aufnahme der Entladungsdrähte 400 versehen, um deren gegenseitigen Abstand innerhalb der Abschirmplatten 401 zu gewährleisten. Die Entladungsdrähte 400 sind mit jeweils einem Ende mittels Schrauben 411 an der isolierenden Halterung 402 befestigt Die anderen Enden der Entladungsdrähte 400 sind durch die am Stütz- und Führungsteil 407 gebildeten Kerben 410 geführt, um Stifte 412 geschlungen, durch einen Schlitz 413 in derare on the insulating brackets 402, 403 adjustable support and guide parts 406, 407 for Adjusting the position of the discharge wires 400 held. By turning the adjusting screws 408, 409 leave the support and guide parts 406,407 perpendicular to the Move recording material in order to achieve the best possible distance between the recording material and set the discharge wires 400. The support and guide part 407 is provided with notches 410 for receiving the Discharge wires 400 provided in order to ensure their mutual spacing within the shielding plates 401. The discharge wires 400 are each one end by means of screws 411 on the insulating Bracket 402 attached. The other ends of the discharge wires 400 are through those on the support and Guide part 407 formed notches 410 guided, looped around pins 412, through a slot 413 in the

Halterung 403 geführt und an einem Zugstift 415 befestigt Der Zugstift 415 ist durch eine Feder 414 nach links belastet und elektrisch leitend mit dem Anschluß 404 verbunden.Bracket 403 out and attached to a tension pin 415. The tension pin 415 is by a spring 414 after loaded on the left and connected to terminal 404 in an electrically conductive manner.

Beim Zerreißen der Entladungsdrähte 400 wird der Zugstift 415 durch die Feder 414 nach links verschoben und kommt dabei in Anlage an eine Masseschlußplatte 416, die mittels der Stellschraube 409 befestigt und leitend mit den Abschirmplatten 401 verbunden ist, wodurch die Hochspannung nun an Masse gelegt ist. Durch diese Sicherheitseinrichtung führt der Koronaentlader dann automatisch keine Hochspannung mehr.When the discharge wires 400 are torn, the tension pin 415 is displaced to the left by the spring 414 and comes into contact with a grounding plate 416, which is fastened by means of the adjusting screw 409 and is conductively connected to the shielding plates 401, as a result of which the high voltage is now connected to ground. Due to this safety device, the corona discharger then automatically no longer carries high voltage.

Wie aus Fig.3 ersichtlich ist, sind isolierende Abdeckteile 417, 418 abnehmbar derartig an den Halterungen 402,403 befestigt daß lediglich der Teil der Entladungsdrähte, an dem die Koronaentladung stattfiwlet, freigelegt istAs can be seen from Figure 3, are insulating Cover parts 417, 418 removably so attached to the brackets 402,403 that only the part of Discharge wires on which the corona discharge takes place, is exposed

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: Koronaentlader mit einem Abschirmgehäuse und mindestens einem innerhalb des Abschirmgehäuses justierbar angeordneten, federgespannten Entladungsdraht, dadurch gekennzeichnet, daß die Einheit aus Entladungsdraht (400) und Spannfeder (414) zwischen stirnseitigen Halterungselementen (402, 403) des Abschirmgehäuses gespannt ist und daß der Entladungsdraht zwischen den Einspannstellen an den Enden seines wirksamen Bereichs an einer Stütz- und Führungseinrichtung (406, 407) anliegt, die ihrerseits durch eine Stellschraubenanordnung (408, 409) zur Einstellung des Abstands zwischen dem Entladungsdraht und der der Koronaentladung auszusetzenden Fläche quer zum Entladungsdraht-Verlauf verstellbar istCorona discharger with a shielding housing and at least one spring-tensioned discharge wire adjustably arranged within the shielding housing, characterized in that the unit of discharge wire (400) and tension spring (414) is tensioned between end-face retaining elements (402, 403) of the shielding housing and that the discharge wire is between the Clamping points at the ends of its effective area rests against a support and guide device (406, 407) , which in turn is adjustable by means of an adjusting screw arrangement (408, 409) for setting the distance between the discharge wire and the surface to be exposed to the corona discharge across the course of the discharge wire
DE2166948A 1970-03-11 1971-03-11 Corona discharger with a shield case Expired DE2166948C3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP45020075A JPS5029651B1 (en) 1970-03-11 1970-03-11
JP3211270 1970-04-15

Publications (3)

Publication Number Publication Date
DE2166948A1 DE2166948A1 (en) 1976-11-11
DE2166948B2 true DE2166948B2 (en) 1981-07-09
DE2166948C3 DE2166948C3 (en) 1982-04-01

Family

ID=26356967

Family Applications (6)

Application Number Title Priority Date Filing Date
DE19712111759 Pending DE2111759A1 (en) 1970-03-11 1971-03-11 Electrophotographic copier
DE2167105A Expired DE2167105C2 (en) 1970-03-11 1971-03-11 Electrophotographic copier
DE19712166668 Pending DE2166668A1 (en) 1970-03-11 1971-03-11 OPTICAL SYSTEM FOR AN ELECTROPHOTOGRAPHIC COPY DEVICE
DE2166667A Expired DE2166667C3 (en) 1970-03-11 1971-03-11 Developing device for an electrophotographic copier
DE2166669A Expired DE2166669C3 (en) 1970-03-11 1971-03-11 Cleaning device in an electrophotographic machine
DE2166948A Expired DE2166948C3 (en) 1970-03-11 1971-03-11 Corona discharger with a shield case

Family Applications Before (5)

Application Number Title Priority Date Filing Date
DE19712111759 Pending DE2111759A1 (en) 1970-03-11 1971-03-11 Electrophotographic copier
DE2167105A Expired DE2167105C2 (en) 1970-03-11 1971-03-11 Electrophotographic copier
DE19712166668 Pending DE2166668A1 (en) 1970-03-11 1971-03-11 OPTICAL SYSTEM FOR AN ELECTROPHOTOGRAPHIC COPY DEVICE
DE2166667A Expired DE2166667C3 (en) 1970-03-11 1971-03-11 Developing device for an electrophotographic copier
DE2166669A Expired DE2166669C3 (en) 1970-03-11 1971-03-11 Cleaning device in an electrophotographic machine

Country Status (6)

Country Link
US (1) US3784297A (en)
CA (1) CA959114A (en)
DE (6) DE2111759A1 (en)
FR (1) FR2081850B1 (en)
GB (1) GB1352752A (en)
NL (2) NL7103059A (en)

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Also Published As

Publication number Publication date
DE2166669C3 (en) 1986-10-23
GB1352752A (en) 1974-05-08
DE2167105C2 (en) 1984-01-26
NL7808013A (en) 1978-12-29
DE2166948C3 (en) 1982-04-01
DE2166667A1 (en) 1975-01-16
CA959114A (en) 1974-12-10
NL7103059A (en) 1971-09-14
DE2166669B2 (en) 1980-09-18
DE2166667C3 (en) 1978-10-26
DE2111759A1 (en) 1971-09-30
DE2166948A1 (en) 1976-11-11
DE2166668A1 (en) 1975-01-16
FR2081850A1 (en) 1971-12-10
US3784297A (en) 1974-01-08
FR2081850B1 (en) 1976-04-16
DE2166667B2 (en) 1978-02-23
DE2166669A1 (en) 1975-01-16

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