EP0824725A1 - Cleaning device for the photoconductor drum of a printer or copier - Google Patents

Cleaning device for the photoconductor drum of a printer or copier

Info

Publication number
EP0824725A1
EP0824725A1 EP96913452A EP96913452A EP0824725A1 EP 0824725 A1 EP0824725 A1 EP 0824725A1 EP 96913452 A EP96913452 A EP 96913452A EP 96913452 A EP96913452 A EP 96913452A EP 0824725 A1 EP0824725 A1 EP 0824725A1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
photoconductor drum
cleaning
film
photoconductor
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
EP96913452A
Other languages
German (de)
French (fr)
Other versions
EP0824725B1 (en
Inventor
Rainer KÖFFERLEIN
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 Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP0824725A1 publication Critical patent/EP0824725A1/en
Application granted granted Critical
Publication of EP0824725B1 publication Critical patent/EP0824725B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • 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
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium

Definitions

  • the invention relates to a cleaning device for the photoconductor drum of a printing or copying machine.
  • All of these cleaning devices serve to remove residual toner from the surface of the photoconductor drum.
  • Cleaning brushes with denser and thicker fibers can improve the cleaning of the drum surface, but do not remove the adhesive residues.
  • the object of the invention is to provide a low-wear and functionally reliable cleaning device for the photoconductor drum of a printing or copying machine, which is suitable for cleaning the photoconductor drum both from adhering toner dust and also removing adhesive residues without damaging the photoconductor drum .
  • a thin film cleans the photoconductor drum from adhering adhesive residues seen in the direction of movement of the photoconductor drum is arranged behind the cleaning brush and the discharge lamp.
  • the cleaning film is pressed against the direction of rotation against the photoconductor layer so that it lies relatively flat.
  • the sharp-edged front edge scrapes off the particles adhering to the layer, in particular those which, because of their size, would interfere with the transfer printing process and thus with the printed image. Due to the selected arrangement, the pressure force is relatively low, so that the wear of the film and the effect on the photoconductor layer are very low.
  • the main purpose of the film is not the cleaning of the photoconductor drum from toner, this is already done by the cleaning brush, but only the cleaning of occasionally adhering larger particles, a low pressure force is sufficient.
  • no special additives are required in the toner, as are necessary when using cleaning blades instead of cleaning brushes.
  • the contact force should be between 0.1 and IN per 100 mm.
  • the angle between the film and the photoconductor layer should be less than 25 °.
  • a film made of polyethylene terephthalate (polyester) with a thickness of 0.05 to 0.2 mm is particularly advantageous.
  • Other plastic materials e.g. from the groups of polyamides, polyimides and polyurethane can be used, provided they meet the requirements mentioned.
  • the film can be interchangeably arranged in a clamping device.
  • Figure 1 is a schematic sectional view of the order
  • FIG. 2 shows a schematic sectional illustration of a stripping element designed as a cleaning film, which is interchangeably arranged in a clamping device.
  • An electrophotographic printing device for printing on continuous paper which is shown only schematically here, contains a photoconductor drum 10 with an inorganic Se photoconductor arranged thereon as an intermediate carrier.
  • the various units necessary for the electrophotographic process are grouped around the photoconductor drum 10. These consist of a charging corotron 11, an exposure device 12 in the form of an LED comb, a developer station 13, a transfer printing station 14, a corotron 15, a cleaning brush 16 rotating counter to the direction of rotation of the photoconductor drum 10, with an associated suction device (not shown here), a discharge lamp 17 and a stripping element 18 attached to the charging co-rotron 11 in the form of a cleaning film.
  • the direction of movement of the photoconductor drum 10 and cleaning brush 16 is marked by arrows.
  • the photo conductor drum 10 is uniformly charged with the aid of the charging corotron 11 and then discharged depending on the character via the exposure device 12.
  • the charge image thus generated is then colored by the developer station 13 with toner based on styrene acrylate or polyester and the toner image thus generated is transferred to continuous paper in the transfer printing station 14.
  • additional charge is sprayed on via the corotron 15 in order to loosen the electrostatic bond of the untransferred toner particles to the surface of the photoconductor drum.
  • the residual toner particles are then removed via the rotating cleaning brush 16, which acts as the main cleaning device.
  • the entire photoconductor surface is then discharged using the discharge lamp 17. Larger particles or sticky substances adhering to the surface of the photoconductor drum are then stripped off with the aid of the cleaning film 18 and the electrophotographic process begins again.
  • the stripping device consists of a thin plastic film made of polyethylene terephthalate (polyester) with a thickness of 0.05 to 0.2 mm with a sharp-edged stripping edge 19 which is arranged in the opposite direction to the running direction of the photoconductor drum 10 is that the angle ⁇ between the film 18 and the surface of the photo conductor drum 10 is less than 25 degrees.
  • the cleaning film 18 lies on the photoconductor drum 10 with a contact force in the order of magnitude between 0.1 and IN per 100 mm.
  • the material used is wear-resistant according to an edge tear force according to DIN 40634 greater than 100N.
  • the cleaning film 18 is fastened on one side in a clamping device.
  • This consists of a leaf spring 21 arranged within a holder 20 with an associated terminal strip 22.
  • the holder is arranged on the charging corotron housing 23 of the charging corotron 11.
  • the charging corotron 11 is designed as an insert which can be removed from the device in a simple manner. This offers favorable conditions for the exchange of the film after a defined mileage.
  • the holding mechanism for the film can be designed to be pivotable.
  • the design of such a pivoting mechanism is familiar to the person skilled in the art.
  • the design of a mechanism for the oscillating movement of a stripping element is described in EP-Bl 0 464 032.
  • polyester is used as the material for the cleaning film 18.
  • Other plastic materials e.g. from the groups of polyamides, polyimides and polyurethane can be used, provided they have the required wear resistance and are free of substances that react with the styrene-acrylate or polyester-based toner used or that impair the properties of the inorganic photoconductor.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In Electrography (AREA)

Abstract

A cleaning device for cleaning a photoconductor drum (10) of a printer or copier contains a brush cleaning station (16) as the main cleaning device and an additional cleaning device downstream of the brush cleaning station (16) in the direction of travel of the photoconducteur drum (10) with a doctor blade (18) bearing elastically on the photoconductor drum (10) against ist direction of rotation and consisting of an abrasion-resistant plastic foil with a scraper edge.

Description

Beschreibungdescription
Reinigungsvorrichtung für die Fotoleitertrommel eines Druck- oder KopiergerätesCleaning device for the photoconductor drum of a printing or copying machine
Die Erfindung betrifft eine Reinigungsvorrichtung für die Fotoleitertrommel eines Druck- oder Kopiergerätes.The invention relates to a cleaning device for the photoconductor drum of a printing or copying machine.
Zur Reinigung der Fotoleitertrommel eines Druck- oder Kopier¬ gerätes von anhaftendem Tonerstaub nach dem Umdruckvorgang ist es üblich, Reinigungsstationen einzusetzen, die mit Hilfe einer rotierenden Bürste und mit Unterdruck den verbleibenden Tonerstaub von der Fotoleitertrommel absaugen. Bei einfach aufgebauten Laserdruckern für niedrige Druckgeschwindigkeiten werden' anstelle der rotierenden Reinigungsbürste Abstreif¬ klingen verwendet (EP-Bl 0 464 032) . Kommt es auf eine beson¬ ders hohe Reinigungswirkung an, können motorisch angetriebene Reinigungsvlies eingesetzt werden.To clean the photoconductor drum of a printing or copying device from adhering toner dust after the transfer printing process, it is customary to use cleaning stations which suck off the remaining toner dust from the photoconductor drum with the aid of a rotating brush and with negative pressure. In simple construction laser printers for low printing speeds' Abstreif¬ will sound used (EP-0464032 Bl) was used instead of the rotating cleaning brush. If a particularly high cleaning effect is important, motor-driven cleaning fleece can be used.
Alle diese Reinigungseinrichtungen dienen dazu, Resttoner von der Oberfläche der Fotoleitertrommel zu entfernen.All of these cleaning devices serve to remove residual toner from the surface of the photoconductor drum.
Anwender von Hochleistungsdruckern setzen in immer größerem Maß Recyclingpapier ein. Das Rohmaterial für die Herstellung von Recyclingpapier enthält auch klebrige Bestandteile, die beim Herstellungsprozeß nicht völlig entfernt werden können. Beim Bedrucken können die Recyclingpapier enthaltenden kleb¬ rigen Substanzen auf der Fotoleitertrommel haften bleiben. Dort sammeln sich Tonerteilchen oder größere Partikel, die den Umdruckvorgang beeinträchtigen. Die Folge sind Aufhellun¬ gen, d.h. helle Flecken im Druckbild. Zur Beseitigung dieser Störung muß die Fotoleitertrommel aus dem Drucker ausgebaut und gereinigt werden. Neben dem erheblichen Aufwand besteht die Gefahr, daß die empfindliche Fotoleitertrommel beschädigt wird, was deren durchschnittliche Lebensdauer wesentlich reduziert. Bei Druck- oder Kopiergeräten mit Reinigungsvlies trat dieses Problem bisher nicht auf, da das Vlies die Klebeflecken und die anhaftenden Partikel beim Reinigungsvorgang beseitigt. Nachteilig ist dabei, daß durch die Vliesreinigung feineHigh-performance printer users are increasingly using recycled paper. The raw material for the production of recycled paper also contains sticky components that cannot be completely removed during the manufacturing process. During printing, the sticky substances containing recycled paper can adhere to the photoconductor drum. There, toner particles or larger particles collect that impair the transfer printing process. The result is lightening, ie bright spots in the printed image. The photoconductor drum must be removed from the printer and cleaned to eliminate this problem. In addition to the considerable effort, there is a risk that the sensitive photoconductor drum will be damaged, which significantly reduces its average life. This problem has not previously occurred with printing or copying machines with cleaning fleece, since the fleece removes the adhesive stains and the adhering particles during the cleaning process. The disadvantage is that the fleece cleaning fine
Riefen in der Fotoleiterschicht entstehen, die die Druckqua¬ lität erheblich beeinträchtigen.Grooves arise in the photoconductor layer, which significantly impair the printing quality.
Reinigungsbürsten mit dichteren und dickeren Fasern können zwar die Reinigung der Trommeloberfläche verbessern, entfer¬ nen aber die Kleberückstände nicht.Cleaning brushes with denser and thicker fibers can improve the cleaning of the drum surface, but do not remove the adhesive residues.
Bei Druckern, die anstelle der Reinigungsbürste ein Reini- gungsblade (Abstreifelement) für die Fotoleitertrommel ver- wenden, streifen diese zwar die Verunreinigung größtenteils ab, derartige Reinigungsblade sind bei hohen Druckgeschwin¬ digkeiten, bei der Verwendung von hochwertigem Tonermaterial z.B. auf Polyester-Basis und bei anorganischem Fotoleiterma¬ terial nur begrenzt einsetzbar oder scheiden aus Verschleiß- gründen völlig aus.In the case of printers which use a cleaning blade (stripping element) for the photoconductor drum instead of the cleaning brush, these largely strip off the contamination, such cleaning blades are at high printing speeds, when using high-quality toner material, e.g. based on polyester and in the case of inorganic photoconductor material can be used only to a limited extent or can be completely eliminated for reasons of wear.
Aufgabe der Erfindung ist es, eine verschleißarme und funk¬ tionssichere Reinigungsvorrichtung für die Fotoleitertrommel eines Druck- oder Kopiergerätes bereitzustellen, die geeignet ist, die Fotoleitertrommel sowohl von anhaftendem Tonerstaub zu reinigen, als auch anhaftende Klebereste zu entfernen, ohne daß dabei die Fotoleitertrommel beschädigt wird.The object of the invention is to provide a low-wear and functionally reliable cleaning device for the photoconductor drum of a printing or copying machine, which is suitable for cleaning the photoconductor drum both from adhering toner dust and also removing adhesive residues without damaging the photoconductor drum .
Diese Aufgabe wird gemäß den Merkmalen des ersten Patentan- Spruches gelöst.This object is achieved according to the features of the first claim.
Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous embodiments of the invention are characterized in the subclaims.
Bei der erfindungsgemäßen Reinigungsvorrichtung reinigt eine dünne Folie die Fotoleitertrommel von anhaftendenn Klebere¬ sten, die in Bewegungsrichtung der Fotoleitertrommel gesehen hinter der Reinigungsbürste und der Entladelampe angeordnet ist. Die Reinigungsfolie wird entgegen der Laufrichtung so an die Fotoleiterschicht angedrückt, daß sie relativ flach anliegt. Die scharfkantig geschnittene Vorderkante schabt die an der Schicht haftenden Partikel ab, insbesondere diejeni¬ gen, die durch ihre Größe den Umdruckvorgang und damit das Druckbild stören würden. Durch die gewählte Anordnung ist die Andruckkraft relativ gering, so daß der Verschleiß der Folie sowie die Auswirkung auf die Fotoleiterschicht sehr gering sind. Da der Hauptzweck der Folie nicht die Reinigung der Fotoleitertrommel von Toner ist, dies erledigt bereits die Reinigungsbürste, sondern nur noch die Reinigung von gele¬ gentlich anhaftenden größeren Partikeln, ist eine geringe Andruckkraft ausreichend. Außerdem sind im Toner keine spe- ziellen Zusätze notwendig, wie sie bei Einsatz von Reini- gungsblades anstelle von Reinigungsbürsten nötig sind.In the cleaning device according to the invention, a thin film cleans the photoconductor drum from adhering adhesive residues seen in the direction of movement of the photoconductor drum is arranged behind the cleaning brush and the discharge lamp. The cleaning film is pressed against the direction of rotation against the photoconductor layer so that it lies relatively flat. The sharp-edged front edge scrapes off the particles adhering to the layer, in particular those which, because of their size, would interfere with the transfer printing process and thus with the printed image. Due to the selected arrangement, the pressure force is relatively low, so that the wear of the film and the effect on the photoconductor layer are very low. Since the main purpose of the film is not the cleaning of the photoconductor drum from toner, this is already done by the cleaning brush, but only the cleaning of occasionally adhering larger particles, a low pressure force is sufficient. In addition, no special additives are required in the toner, as are necessary when using cleaning blades instead of cleaning brushes.
Als Material für die Reinigungsfolien eignen sich besonders Materialien, die einerseits verschleißfest sind, andererseits frei von Substanzen, die mit Toner reagieren können, oder die die Eigenschaften des Fotoleiters beeinträchtigen. Die Aufla- gekraft sollte zwischen 0,1 und IN pro 100 mm liegen. Der Winkel zwischen Folie und Fotoleiterschicht sollte weniger als 25° betragen. Besonders vorteilhaft ist eine Folie aus Polyethylenterephthalat (Polyester) mit einer Dicke von 0,05 bis 0,2 mm. Auch andere KunstStoffmaterialien, z.B. aus den Stoffgruppen Polyamide, Polyimide und Polyurethan, können verwendet werden, sofern sie die genannten Anforderungen erfüllen.Materials that are wear-resistant on the one hand and free of substances that can react with toner or that impair the properties of the photoconductor are particularly suitable as the material for the cleaning films. The contact force should be between 0.1 and IN per 100 mm. The angle between the film and the photoconductor layer should be less than 25 °. A film made of polyethylene terephthalate (polyester) with a thickness of 0.05 to 0.2 mm is particularly advantageous. Other plastic materials, e.g. from the groups of polyamides, polyimides and polyurethane can be used, provided they meet the requirements mentioned.
Für die erforderliche Reinigungsfunktion ist es im Prinzip ausreichend, wenn die Folie nur zeitweise an die Fotoleiter¬ schicht angedrückt wird. Durch einen Mechanismus, der die Folie an- und abschwenken kann, kann bei Bedarf die Lebens- dauer der Folie wesentlich erhöht, sowie die Auswirkung auf die Fotoleiterschicht minimiert werden. Auch eine Querbewegung der Folie zur Laufrichtung der Foto¬ leitertrommel ist geeignet, örtliche Verschleißeffekte an Folie oder Fotoleiterschicht auf größere Bereiche zu vertei¬ len.In principle, it is sufficient for the required cleaning function if the film is only pressed onto the photoconductor layer only temporarily. By means of a mechanism that can swing the film in and out, the service life of the film can be significantly increased if necessary, and the impact on the photoconductor layer can be minimized. A transverse movement of the film to the running direction of the photoconductor drum is also suitable for distributing local wear effects on the film or photoconductor layer over larger areas.
Es ist weiterhin günstig, die Folie auswechselbar auszuge¬ stalten. Hierzu kann die Folie auswechselbar in einer Klemm¬ einrichtung angeordnet sein. It is also favorable to design the film so that it can be replaced. For this purpose, the film can be interchangeably arranged in a clamping device.
Ausführungsformen der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden beispielsweise näher beschrieben. Es zeigenEmbodiments of the invention are shown in the drawings and are described in more detail below, for example. Show it
Figur 1 eine schematische Schnittdarstellung der um dieFigure 1 is a schematic sectional view of the order
Fotoleitertrommel angeordneten Aggregate für den elektrofoto- grafisehen Prozeß undUnits arranged for the electrophotographic process and photoconductor drum
Figur 2 eine schematische Schnittdarstellung eines als Reini- gungsfolie ausgebildeten Abstreifelementes, das in einer Klemmeinrichtung auswechselbar angeordnet ist.FIG. 2 shows a schematic sectional illustration of a stripping element designed as a cleaning film, which is interchangeably arranged in a clamping device.
Eine elektrofotografische Druckeinrichtung zum Bedrucken von Endlospapier, die hier nur schematisch dargestellt ist, enthält als Zwischenträger eine Fotoleitertrommel 10 mit einem darauf angeordneten anorganischen Se-Fotoleiter. Um die Fotoleitertrommel 10 gruppiert sind die verschiedenen für den elektrofotografischen Prozeß notwendigen Aggregate. Diese bestehen aus einem Ladecorotron 11, einer Belichtungseinrich- tung 12 in Form eines LED-Kammes, einer Entwicklerstation 13, einer Umdruckstation 14, einem Corotron 15, einer entgegen der Drehrichtung der Fotoleitertrommel 10 rotierenden Reini¬ gungsbürste 16 mit zugehöriger hier nicht dargestellter Absaugeinrichtung, einer Entladelampe 17 und einem am Ladeco- rotron 11 befestigten Abstreifelement 18 in Form einer Reini¬ gungsfolie. Die Bewegungsrichtung von Fotoleitertrommel 10 und Reinigungsbürste 16 ist dabei durch Pfeile gekennzeich¬ net. Beim elektrofotografischen Prozeß wird dabei die Foto¬ leitertrommel 10 mit Hilfe des Ladecorotrons 11 gleichmäßig aufgeladen und dann zeichenabhängig über die Belichtungsein¬ richtung 12 entladen. Das so erzeugte Ladungsbild wird dann über die Entwicklerstation 13 mit Toner auf Styrolacrylat- oder Polyester-Basis eingefärbt und das so erzeugte Tonerbild in der Umdruckstation 14 auf Endlospapier übertragen. Danach wird über das Corotron 15 zusätzlich Ladung aufgesprüht, um die elektrostatische Bindung der nicht übertragenen Toner¬ teilchen an die Oberfläche der Fotoleitertrommel zu lockern. Die Entfernung der Resttonerteilchen erfolgt dann über die rotierende Reinigungsbürste 16, die als Hauptreinigungsein¬ richtung wirkt. Danach wird die gesamte Fotoleiteroberfläche mit Hilfe der Entladelampe 17 entladen. Auf der Fotoleiter- trommeloberfläche anhaftende größere Partikel oder klebrige Substanzen werden dann mit Hilfe der Reinigungsfolie 18 abgestreift und der elektrofotografische Prozeß beginnt von Neuem.An electrophotographic printing device for printing on continuous paper, which is shown only schematically here, contains a photoconductor drum 10 with an inorganic Se photoconductor arranged thereon as an intermediate carrier. The various units necessary for the electrophotographic process are grouped around the photoconductor drum 10. These consist of a charging corotron 11, an exposure device 12 in the form of an LED comb, a developer station 13, a transfer printing station 14, a corotron 15, a cleaning brush 16 rotating counter to the direction of rotation of the photoconductor drum 10, with an associated suction device (not shown here), a discharge lamp 17 and a stripping element 18 attached to the charging co-rotron 11 in the form of a cleaning film. The direction of movement of the photoconductor drum 10 and cleaning brush 16 is marked by arrows. In the electrophotographic process, the photo conductor drum 10 is uniformly charged with the aid of the charging corotron 11 and then discharged depending on the character via the exposure device 12. The charge image thus generated is then colored by the developer station 13 with toner based on styrene acrylate or polyester and the toner image thus generated is transferred to continuous paper in the transfer printing station 14. Thereafter, additional charge is sprayed on via the corotron 15 in order to loosen the electrostatic bond of the untransferred toner particles to the surface of the photoconductor drum. The residual toner particles are then removed via the rotating cleaning brush 16, which acts as the main cleaning device. The entire photoconductor surface is then discharged using the discharge lamp 17. Larger particles or sticky substances adhering to the surface of the photoconductor drum are then stripped off with the aid of the cleaning film 18 and the electrophotographic process begins again.
Wie in der Figur 2 dargestellt, besteht die Abstreifeinrich- tung aus einer dünnen Kunststoffolie aus Polyethylen¬ terephthalat (Polyester) mit einer Dicke von 0,05 bis 0,2 mm mit einer scharfkantigen Abstreifkante 19, die entgegen der Laufrichtung der Fotoleitertrommel 10 derart angeordnet ist, daß der Winkel α zwischen Folie 18 und Oberfläche der Foto¬ leitertrommel 10 weniger als 25 Winkelgrade beträgt. Die Reinigungsfolie 18 liegt dabei mit einer Auflagekraft in der Größenordnung zwischen 0,1 und IN pro 100 mm auf der Fotolei¬ tertrommel 10 auf. Das verwendete Material ist verschleißfest entsprechend einer Kanteneinreißkraft nach DIN 40634 größer als 100N.As shown in FIG. 2, the stripping device consists of a thin plastic film made of polyethylene terephthalate (polyester) with a thickness of 0.05 to 0.2 mm with a sharp-edged stripping edge 19 which is arranged in the opposite direction to the running direction of the photoconductor drum 10 is that the angle α between the film 18 and the surface of the photo conductor drum 10 is less than 25 degrees. The cleaning film 18 lies on the photoconductor drum 10 with a contact force in the order of magnitude between 0.1 and IN per 100 mm. The material used is wear-resistant according to an edge tear force according to DIN 40634 greater than 100N.
Damit die Reinigungsfolie 18 leicht ausgewechselt werden kann, ist sie einseitig in einer Klemmeinrichtung befestigt. Diese besteht aus einer innerhalb einer Halterung 20 angeord¬ neten Blattfeder 21 mit zugehöriger Klemmleiste 22.So that the cleaning film 18 can be easily replaced, it is fastened on one side in a clamping device. This consists of a leaf spring 21 arranged within a holder 20 with an associated terminal strip 22.
Bei dem dargestellten Ausführungsbeispiel ist die Halterung am Ladecorotrongehäuse 23 des Ladecorotrons 11 angeordnet. Das Ladecorotron 11 ist als Einschub ausgebildet, der in einfacher Weise aus dem Gerät herausgenommen werden kann. Dies bietet günstige Voraussetzungen für den Tausch der Folie nach einer definierten Laufleistung.In the exemplary embodiment shown, the holder is arranged on the charging corotron housing 23 of the charging corotron 11. The charging corotron 11 is designed as an insert which can be removed from the device in a simple manner. This offers favorable conditions for the exchange of the film after a defined mileage.
Da es im Prinzip ausreichend ist, wenn die Folie 18 nur zeitweise in Abhängigkeit vom Betriebszustand der Druckein¬ richtung an die Fotoleitertrommel 10 angedrückt wird, kann der Haltemechanismus für die Folie verschwenkbar ausgestaltet sein. Die Ausgestaltung eines derartigen Verschwenkmechanis- mus ist dem Fachmann geläufig.Since, in principle, it is sufficient if the film 18 is pressed onto the photoconductor drum 10 only temporarily depending on the operating state of the printing device the holding mechanism for the film can be designed to be pivotable. The design of such a pivoting mechanism is familiar to the person skilled in the art.
Auch eine Bewegung z.B. in Form einer oszillierenden Bewegung der Folie 18 quer zur Laufrichtung der Fotoleitertrommel 10 ist geeignet, örtliche Verschleißeffekte an Folie 18 oder Fotoleiterschicht auf der Fotoleitertrommel 10 auf größere Bereiche zu verteilen. Die Ausgestaltung eines Mechanismus zur oszillierenden Bewegung eines Abstreifelementes wird in der EP-Bl 0 464 032 beschrieben.Also a movement e.g. In the form of an oscillating movement of the film 18 transversely to the running direction of the photoconductor drum 10, it is suitable to distribute local wear effects on the film 18 or photoconductor layer on the photoconductor drum 10 over larger areas. The design of a mechanism for the oscillating movement of a stripping element is described in EP-Bl 0 464 032.
Als Material für die Reinigungsfolie 18 wird bei dem be¬ schriebenen Ausführungsbeispiel Polyester verwendet. Auch andere Kunststoffmaterialien z.B. aus den Stoffgruppen Polya¬ mide, Polyimide und Polyurethan können verwendet werden, sofern sie die erforderliche Verschleißfestigkeit aufweisen und frei von Substanzen sind, die mit dem verwendeten Toner auf Styrolacrylat- oder Polyester-Basis reagieren oder die die Eigenschaften des anorganischen Fotoleiters beeinträchti¬ gen. In the described embodiment, polyester is used as the material for the cleaning film 18. Other plastic materials, e.g. from the groups of polyamides, polyimides and polyurethane can be used, provided they have the required wear resistance and are free of substances that react with the styrene-acrylate or polyester-based toner used or that impair the properties of the inorganic photoconductor.

Claims

Patentansprüche claims
1. Reinigungsvorrichtung zum Reinigen einer Fotoleitertrommel (10) eines Druck- oder Kopiergerätes mit einer Bürstenreinigungsstation (16) als Hauptreinigungsein¬ richtung und einer der Bürstenreinigungsstation (16) in Laufrichtung der Fotoleitertrommel (10) nachgeordnete Zusatzreinigungseinrich¬ tung mit einem elastisch an der Fotoleitertrommel (10) entge- gen deren Laufrichtung anliegenden Abstreifelement (18) aus einer eine Abstreifkante (19) aufweisenden abriebfesten Kunststoffolie.1. Cleaning device for cleaning a photoconductor drum (10) of a printing or copying device with a brush cleaning station (16) as the main cleaning device and one of the brush cleaning station (16) downstream of the photoconductor drum (10) additional cleaning device with an elastic on the photoconductor drum ( 10) against the direction of travel of the stripping element (18) made of an abrasion-resistant plastic film having a stripping edge (19).
2. Reinigungsvorrichtung nach Anspruch 1, wobei das Abstreif- element (18) eine Dicke von 0,05 bis 0,2 mm aufweist und mit einer Auflagekraft von 0,1 bis IN pro 100 mm Kantenlänge auf dem Fotoleiter (10) aufliegt und zwar in einem Winkel α zwischen Fotoleitertrommeloberfläche und Folie (18), der kleiner ist als 25 Winkelgrad.2. Cleaning device according to claim 1, wherein the stripping element (18) has a thickness of 0.05 to 0.2 mm and rests on the photoconductor (10) with a contact force of 0.1 to IN per 100 mm edge length, specifically at an angle α between the photoconductor drum surface and the film (18) which is less than 25 degrees.
3. Reinigungsvorrichtung nach einem der Ansprüche 1 oder 2 mit einer Kunststoffolie (18) aus einem Kunststoffmaterial mit einer Kanteneinreißkraft nach DIN 40634 die gößer ist als 100N und das frei von Substanzen ist, die mit dem verwendeten Toner reagieren können und/oder die die Fotoleitereigenschaf¬ ten der Fotoleitertrommel (10) beeinträchtigen.3. Cleaning device according to one of claims 1 or 2 with a plastic film (18) made of a plastic material with an edge tearing force according to DIN 40634 which is greater than 100N and which is free of substances which can react with the toner used and / or which are the photoconductor properties ¬ th affect the photoconductor drum (10).
4. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 3 mit Polyethylenterephthalat als Folienmaterial.4. Cleaning device according to one of claims 1 to 3 with polyethylene terephthalate as the film material.
5. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 3 mit einem Material aus den Stoffgruppen Polyamide oder Polyimide oder Polyurethan als Folienmaterial.5. Cleaning device according to one of claims 1 to 3 with a material from the groups of polyamides or polyimides or polyurethane as the film material.
6. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 5 mit einem das Abstreifelement (18) bedarfsweise an die Fotolei¬ tertrommel (10) an- und abschwenkenden Mechanismus. 6. Cleaning device according to one of claims 1 to 5 with a the stripping element (18) if necessary to the Fotolei¬ tertrommel (10) and swiveling mechanism.
7. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 6 mit einem das Abstreifelement (18) quer zur Laufrichtung der Fotoleitertrommel (10) bewegenden Mechanismus.7. Cleaning device according to one of claims 1 to 6 with a the stripping element (18) transversely to the running direction of the photoconductor drum (10) moving mechanism.
8. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 7 mit einer das Abstreifelement (18) austauschbar aufnehmenden Halterung (20) .8. Cleaning device according to one of claims 1 to 7 with an interchangeably receiving holder (20) receiving the stripping element (18).
9. Reinigungsvorrichtung nach Anspruch 8 mit einer Klemmein¬ richtung (21, 22) als Halterung. 9. Cleaning device according to claim 8 with a Klemmein¬ device (21, 22) as a holder.
EP96913452A 1995-05-03 1996-05-02 Cleaning device for the photoconductor drum of a printer or copier Expired - Lifetime EP0824725B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19516210 1995-05-03
DE19516210 1995-05-03
PCT/DE1996/000759 WO1996035151A1 (en) 1995-05-03 1996-05-02 Cleaning device for the photoconductor drum of a printer or copier

Publications (2)

Publication Number Publication Date
EP0824725A1 true EP0824725A1 (en) 1998-02-25
EP0824725B1 EP0824725B1 (en) 1998-09-16

Family

ID=7760964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96913452A Expired - Lifetime EP0824725B1 (en) 1995-05-03 1996-05-02 Cleaning device for the photoconductor drum of a printer or copier

Country Status (4)

Country Link
US (1) US5832355A (en)
EP (1) EP0824725B1 (en)
DE (1) DE59600583D1 (en)
WO (1) WO1996035151A1 (en)

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Publication number Priority date Publication date Assignee Title
DE10125326B4 (en) 2001-05-23 2004-03-18 OCé PRINTING SYSTEMS GMBH Device for removing a coating adhering to an intermediate carrier in an electrographic printing or copying machine
US7319841B2 (en) * 2005-09-22 2008-01-15 Infoprint Solutions Company, Llc Apparatus and method for cleaning residual toner with a scraper blade periodically held in contact with a toner transfer surface
DE102009032611A1 (en) 2009-07-10 2011-02-17 OCé PRINTING SYSTEMS GMBH Device for guiding printing substrate sheet in printer or copier, has guide element over which printing substrate sheet is guided during transport in transport direction
WO2011127469A1 (en) 2010-04-09 2011-10-13 Medrad, Inc. Radiopharmaceutical concentration measurement system and method

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NL7312451A (en) * 1972-09-16 1974-02-25
JPS6234182A (en) * 1985-08-08 1987-02-14 Minolta Camera Co Ltd Method for restoring surface of photosensitive body
EP0320812B1 (en) * 1987-12-18 1993-09-15 Fujitsu Limited Cleaning unit for cleaning the recording medium of an electrophotographic apparatus
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See references of WO9635151A1 *

Also Published As

Publication number Publication date
DE59600583D1 (en) 1998-10-22
EP0824725B1 (en) 1998-09-16
US5832355A (en) 1998-11-03
WO1996035151A1 (en) 1996-11-07

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