EP0402525B1 - Cartridge for copying apparatus and the like - Google Patents

Cartridge for copying apparatus and the like Download PDF

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Publication number
EP0402525B1
EP0402525B1 EP89122263A EP89122263A EP0402525B1 EP 0402525 B1 EP0402525 B1 EP 0402525B1 EP 89122263 A EP89122263 A EP 89122263A EP 89122263 A EP89122263 A EP 89122263A EP 0402525 B1 EP0402525 B1 EP 0402525B1
Authority
EP
European Patent Office
Prior art keywords
toner
container
aperture
locking component
cartridge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89122263A
Other languages
German (de)
French (fr)
Other versions
EP0402525A2 (en
EP0402525A3 (en
Inventor
Manfred Keilbach
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT89122263T priority Critical patent/ATE91808T1/en
Publication of EP0402525A2 publication Critical patent/EP0402525A2/en
Publication of EP0402525A3 publication Critical patent/EP0402525A3/en
Application granted granted Critical
Publication of EP0402525B1 publication Critical patent/EP0402525B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803—Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1828—Prevention of damage or soiling, e.g. mechanical abrasion
    • G03G21/1832—Shielding members, shutter, e.g. light, heat shielding, prevention of toner scattering
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0896—Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894
    • G03G15/0898—Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894 for preventing toner scattering during operation, e.g. seals
    • 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
    • G03G21/10—Collecting or recycling waste developer
    • G03G21/105—Arrangements for conveying toner waste
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00987—Remanufacturing, i.e. reusing or recycling parts of the image forming apparatus
    • 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
    • G03G2221/1621—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts for the cleaning unit re-use of cleaned toner
    • 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
    • G03G2221/1648—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts using seals, e.g. to prevent scattering of toner
    • 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
    • G03G2221/1669—Details about used materials
    • 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
    • G03G2221/183—Process cartridge

Definitions

  • the invention relates to a cassette for copiers and the like with an image drum and a toner reservoir.
  • Cassettes of this type are usually designed as so-called disposable cassettes. They are thrown away after the toner is used up, even if they are still fully functional, including the image drum.
  • the invention is therefore based on the object of providing a cassette for copiers and the like which does not have to be thrown away until the life of the image drum has been reached without there being an unintentional leakage of toner and / or developer while the cassette is outside the associated device.
  • This object is achieved by a cassette with the features of claim 1.
  • the solution according to the invention as claimed in claim 1 is based on the consideration that there are two possibilities for making available the increased amount of toner which enables the image drum to be used until the end of its lifespan.
  • One possibility is to provide the toner reservoir with a subsequently reclosable opening before the first use of the cartridge, through which the barrier film, which tightly closes the outlet opening of both the toner reservoir and the developer reservoir with an unused cartridge, with a passage opening can be provided without the film losing its closing function for the outlet opening of the developer reservoir.
  • the toner storage container Through the passage opening of the barrier film, at least a large part of the toner located in the toner storage container can then be transferred into the storage space, which makes it possible to refill a toner quantity in the toner storage container, which is generally approximately as large as that before the opening of the Toner container in this existing filling quantity. Since the toner cannot escape from the supply space on its own and the developer reservoir is still tightly sealed, no toner can escape while the cartridge is outside the associated device.
  • the other possibility according to claim 2 is to refill the cartridge after the consumption of the first toner filling and the removal of the waste toner and since the barrier film has been removed is and can no longer be replaced to prevent the leakage of toner and / or developer by means of a removable blocking element which interrupts the transport path of the waste toner return device.
  • the latter option is also suitable for those cartridges which are filled with an increased amount of toner before first use, provided that the image drum is still functional after this increased amount of toner has been used up. Furthermore, it is possible to fill in the increased amount of toner when refilling an already used cassette, provided that this still makes sense with regard to the remaining life of the image drum. Before replacing the old toner with new toner, only the cleaning unit of the cartridge needs to be cleaned. It is therefore unnecessary to disassemble the cassette almost completely and therefore costly, as would be necessary if one wanted to seal the toner supply container.
  • the blocking element is preferably a film, for example a silicone paper.
  • the waste toner return device consists of a first screw conveyor, which penetrates the wall of the waste toner container and feeds waste toner to a second screw conveyor, which extends transversely to the axis of the first screw conveyor and feeds the waste toner to a third screw conveyor, which lies parallel to the first screw conveyor the wall of the Penetrates the toner reservoir.
  • the blocking element bears against the third screw conveyor and interrupts the transport path here.
  • An interruption of the transport route at this point is particularly advantageous because it is sufficient to place a film on that part of this screw conveyor on which the toner supplied from the second screw conveyor falls. Since a sealing body is generally arranged between these two screw conveyors, the film only needs to be inserted between the sealing body and the third screw conveyor.
  • the interruption of the transport route or an additional interruption is also possible on the first screw conveyor.
  • the locking element preferably has a trigger tab which can be grasped with the fingers and which can be formed by a section of the strip when using a strip-shaped film. The user then only needs to grasp and pull off the pull tab that is visible under the front housing. The locking element then releases the transport route.
  • a cassette for copiers or the like has an outer housing 1 made of plastic, in which a toner reservoir 2 is contained.
  • the image drum 4 On the side facing away from the magnetic roller 3, the image drum 4 is followed by a drum cleaning unit with an old toner container 5.
  • waste toner return screw 7 which is driven by a gear 6 when the cartridge is used, and which forms one of the mechanical conveying elements of a waste toner return device.
  • This waste toner return screw 7 is fed to the waste toner by means of a first transport screw 8, which penetrates an opening in the end wall of the waste toner container 4 and feeds the waste toner removed from this container onto the end of the waste toner return screw 7 adjacent to the gear 6.
  • the other end of the waste toner return screw 7 is arranged above a second transport screw 9, which penetrates the end wall of the toner supply container 2. Between that At the end of the waste toner return screw 7 and the section of the second transport screw 9 arranged underneath, a sealing body 10 is arranged, which forms a feed hopper for the second transport screw 9.
  • an opening 11 is worked into the top of the outer housing 1 above the toner supply container 2, through which the waste toner can be removed and new toner or developer can be filled in.
  • the opening 11 is then sealed again by means of an adhesive strip 12. After cleaning the cleaning unit and waste toner return device, the cartridge is fully functional again.
  • the strip-shaped barrier film 13 is so long that its portion hanging down from the outer housing 1 can be used as a pull tab that the user only needs to grasp with his fingers.
  • the sealing film is pulled out of the gap between the second screw conveyor 9 and the sealing body 10 by a pull in the longitudinal direction of the pull tab, which results in the transport path the waste toner return device is released again.
  • FIG. 3 The exemplary embodiment of a cassette for copying machines or the like shown in FIG. 3 largely corresponds to the exemplary embodiment according to FIGS. 1 and 2, which is why only that part is shown which differs in part from the cassette according to the first exemplary embodiment.
  • the outer housing 101 contains a toner reservoir 102 and next to this a developer reservoir 114.
  • the toner reservoir 102 is provided with an outlet opening 102 ', the developer reservoir with an outlet opening 114'.
  • these two outlet openings are closed before the first use of the cassette with a barrier film 115, which covers the outlet openings 102 'and 114' covering the underside of the two storage containers 102 and 114 and through a slot in the wall of the outer housing 101 after is guided outside so that it can be grasped here for the purpose of pulling off.
  • the slot for the passage of the barrier film 115 through the wall of the housing 101 is dimensioned such that it is completely closed by the barrier film 115.
  • the other end of the barrier film 115 is glued to the underside of the developer reservoir 114.
  • the barrier film 115 is pressed by a toner conveying drum 116 onto the underside of the toner reservoir 102.
  • the toner delivery drum 116 lies tightly against a partition wall 117 which, together with the toner storage container 102 and part of the wall of the outer housing 101, delimits a toner storage space 118 from which the toner can only exit to the magnetic roller (not shown) when the toner delivery drum 116 is driven becomes.
  • the top of the toner reservoir 102 has been subsequently provided with an opening 111 through which and the passage opening 102 'through the barrier film 115 is provided with an opening 115'.
  • This breakthrough 115 'at least a portion of the toner located in the toner reservoir 102 is transferred into the reservoir 118.
  • the toner reservoir 102 is then filled with additional toner.
  • the opening 111 is then closed, for example by means of an adhesive tape.
  • the cassette 101 now contains approximately twice the amount of toner compared to known cassettes.
  • the barrier film 115 is completely pulled out of the housing 101, as in the known cassettes. As a result, the outlet openings 114 'and 102' are completely released. The developer can thereby reach the magnetic roller and, after activation of the toner transport roller 116, can be mixed with the toner as required. Of course, if the life of the imaging drum should allow this, this cartridge can be made ready for operation again in the manner described in connection with the exemplary embodiment according to FIGS. 1 and 2 after the entire toner has been used up.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Sustainable Development (AREA)
  • Dry Development In Electrophotography (AREA)
  • Cleaning In Electrography (AREA)
  • Pens And Brushes (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

A cartridge for copying apparatus and the like, which contains an image drum (4) and a toner stock container (2), in the wall of which a closeable toner charging aperture (11) is provided, has at least one removable locking element (13) which interrupts the transport path of a used toner return device (7, 8, 9) and thus prevents the emergence of toner from the cartridge and/or closes the outlet aperture of a developer stock chamber and is provided, in the region of the outlet aperture of the toner stock container with a passage aperture through which the toner passes into a storage space from which the toner can only emerge with the aid of a toner transporting device (116). <IMAGE>

Description

Die Erfindung betrifft eine Kassette für Kopiergeräte und dergleichen mit einer Bildtrommel und einem Tonervorratsbehälter.The invention relates to a cassette for copiers and the like with an image drum and a toner reservoir.

Kassetten dieser Art sind üblicherweise als sogenannte Einwegkassetten ausgebildet. Sie werden, nachdem der Tonervorrat verbraucht ist, weggeworfen, auch wenn sie im übrigen einschließlich der Bildtrommel noch voll funktionsfähig sind.Cassettes of this type are usually designed as so-called disposable cassettes. They are thrown away after the toner is used up, even if they are still fully functional, including the image drum.

Bei einer bekannten Kassette dieser Art (EP-A-0 282 223) ist der Tonervorratsbehälter mit Ausnahme der Tonerauslaßöffnung, durch die hindurch der Tonervorrat in den Tonervorratsraum gelangt, nachdem eine Sperrfolie entfernt und damit die Tonerauslaßöffnung freigegeben worden ist, vollständig geschlossen. Da die Tonerauslaßöffnung von außen her nicht zugänglich ist, ist es deshalb nicht möglich, Toner nachzufüllen, wenn der Tonervorrat verbraucht ist.In a known cartridge of this type (EP-A-0 282 223), the toner reservoir is completely closed with the exception of the toner outlet opening, through which the toner reservoir enters the toner reservoir after a barrier film has been removed and the toner outlet opening has thus been released. Since the toner outlet opening is not accessible from the outside, it is therefore not possible to refill the toner when the toner supply has been used up.

Bei einer anderen bekannten Kassette der eingangs genannten Art (US-A-4 500 196), wird der in der Bildtrommelreinigungsstation anfallende Alttoner nicht in den Tonervorratsbehälter oder einen Tonervorratsraum zurückgeführt. Vielmehr transportiert ihn die Tonertransporteinrichtung, die hierfür eine Förderschnecke aufweist, zu einem Altoner-Sammelbehälter, der, wenn er gefüllt ist, entsorgt wird. Eine Alttoner-Rückführungseinrichtung mit drei Förderschnecken ist jedoch bei der in der EP-A-0 282 223 offenbarten Kassette vorgesehen. Eine Tonerrückführung reicht jedoch in der Regel nicht aus, um die Lebensdauer der Bildtrommel und der übrigen Komponenten voll ausnutzen zu können.In another known cassette of the type mentioned at the beginning (US-A-4 500 196), the waste toner accumulating in the image drum cleaning station is not returned to the toner storage container or a toner storage room. Rather, the toner transport device, which has a screw conveyor for this purpose, transports it to an Altoner collecting container, which, when filled, is disposed of. However, a waste toner return device with three screw conveyors is provided in the cartridge disclosed in EP-A-0 282 223. However, toner recycling is usually not enough to fully utilize the life of the imaging drum and other components.

Da das Wegwerfen solcher Kassetten aus ökonomischen und ökologischen Gründen unverantwortlich ist, wurde vorgeschlagen (DE-GM 87 16 525.2), nach dem Verbrauch des Toners den Tonervorratsbehälter mit einer Nachfüllöffnung zu versehen, um den Alttoner entnehmen und neuen Toner einfüllen zu können. Beim Transport einer in dieser Weise mit neuem Toner gefüllten Kassette kann es jedoch zu einem Austreten des Toners aus der Kassette kommen, weil vor dem ersten Gebrauch der Kassette eine Sperrfolie abgezogen werden muß, welche nicht nur die Austrittsöffnung des Tonervorratsbehälters, sondern auch diejenige eines Entwicklerbehälters dicht verschließt, und der Alttonerbehälter wegen der Alttoner-Rückführeinrichtung nicht vollkommen dicht ist.Since throwing away such cartridges is irresponsible for economic and ecological reasons, it was proposed (DE-GM 87 16 525.2) to provide the toner reservoir with a refill opening after the toner has been used up, in order to be able to remove the old toner and fill in new toner. When a cartridge filled with new toner is transported in this way, however, the toner may leak out of the cartridge because, before the cartridge is used for the first time, a barrier film must be removed, which not only covers the outlet opening of the toner reservoir, but also that of a developer container closes tightly, and the waste toner container is not completely leakproof because of the waste toner return device.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Kassette für Kopiergeräte und dergleichen zu schaffen, die erst dann weggeworfen zu werden braucht, wenn die Lebensdauer der Bildtrommel erreicht ist, ohne daß es zu einem ungewollten Austreten von Toner und/oder Entwickler kommen kann, während sich die Kassette außerhalb des zugehörigen Gerätes befindet. Diese Aufgabe löst eine Kassette mit den Merkmalen des Anspruches 1.The invention is therefore based on the object of providing a cassette for copiers and the like which does not have to be thrown away until the life of the image drum has been reached without there being an unintentional leakage of toner and / or developer while the cassette is outside the associated device. This object is achieved by a cassette with the features of claim 1.

Die erfindungsgemäße Lösung nach Anspruch 1 beruht auf der Überlegung, daß es zwei Möglichkeiten gibt, die vergrößerte Tonermenge, die eine Nutzung der Bildtrommel bis an das Ende ihrer Lebensdauer ermöglicht, zur Verfügung zu stellen. Die eine Möglichkeit besteht darin, vor dem ersten Gebrauch der Kassette deren Tonervorratsbehälter mit einer anschließend wieder verschließbaren Öffnung zu versehen, durch die hindurch die Sperrfolie, welche bei einer noch ungebrauchten Kassette die Auslaßöffnung sowohl des Tonervorratsbehälters als auch des Entwicklervorratsbehälters dicht verschließt, mit einer Durchlaßöffnung versehen werden kann, ohne daß die Folie ihre Schließfunktion für die Auslaßöffnung des Entwicklervorratsbehälters verliert. Durch die Durchlaßöffnung der Sperrfolie hindurch kann dann zumindest ein großer Teil des sich im Tonervorratsbehälter befindenen Toners in den Vorratsraum überführt werden, wodurch es möglich ist, in den Tonervorratsbehälter eine Tonermenge nachzufüllen, die in der Regel annähernd so groß ist wie die vor dem Öffnen des Tonervorratsbehälters in diesem vorhandenen Füllmenge. Da der Toner aus dem Vorratsraum nicht von selbst austreten kann und der Entwicklervorratsbehälter nach wie vor dicht verschlossen ist, kann es zu keinem Toneraustritt kommen, während sich die Kassette außerhalb des zugehörigen Gerätes befindet.The solution according to the invention as claimed in claim 1 is based on the consideration that there are two possibilities for making available the increased amount of toner which enables the image drum to be used until the end of its lifespan. One possibility is to provide the toner reservoir with a subsequently reclosable opening before the first use of the cartridge, through which the barrier film, which tightly closes the outlet opening of both the toner reservoir and the developer reservoir with an unused cartridge, with a passage opening can be provided without the film losing its closing function for the outlet opening of the developer reservoir. Through the passage opening of the barrier film, at least a large part of the toner located in the toner storage container can then be transferred into the storage space, which makes it possible to refill a toner quantity in the toner storage container, which is generally approximately as large as that before the opening of the Toner container in this existing filling quantity. Since the toner cannot escape from the supply space on its own and the developer reservoir is still tightly sealed, no toner can escape while the cartridge is outside the associated device.

Die andere Möglichkeit nach Anspruch 2 besteht darin, die Kassette nach dem Verbrauch der ersten Tonerfüllung und der Entnahme des Alttoners erneut mit Toner zu füllen und, da die Sperrfolie abgezogen ist und nicht mehr ersetzt werden kann, den Austritt von Toner und/oder Entwickler mittels eines entfernbaren Sperrelementes zu verhindern, das den Transportweg der Alttoner-Rückführeinrichtung unterbricht.The other possibility according to claim 2 is to refill the cartridge after the consumption of the first toner filling and the removal of the waste toner and since the barrier film has been removed is and can no longer be replaced to prevent the leakage of toner and / or developer by means of a removable blocking element which interrupts the transport path of the waste toner return device.

Selbstverständlich kommt die letztgenannte Möglichkeit auch für solche Kassetten in Frage, die vor dem ersten Gebrauch mit einer vergrößerten Tonermenge gefüllt sind, sofern nach dem Verbrauch dieser vergrößerten Tonermenge die Bildtrommel noch funktionsfähig ist. Ferner ist es möglich, bei der erneuten Befüllung einer bereits benutzten Kassette die erhöhte Tonermenge einzufüllen, sofern dies im Hinblick auf die restliche Lebensdauer der Bildtrommel noch sinnvoll ist. Vor dem Ersetzen des Alttoners durch neuen Toner braucht nur die Reinigungseinheit der Kassette gereinigt zu werden. Es erübrigt sich deshalb eine fast vollständige und damit aufwendige Zerlegung der Kassette, wie dies erforderlich wäre, wenn man den Tonervorratsbehälter abdichten wollte.Of course, the latter option is also suitable for those cartridges which are filled with an increased amount of toner before first use, provided that the image drum is still functional after this increased amount of toner has been used up. Furthermore, it is possible to fill in the increased amount of toner when refilling an already used cassette, provided that this still makes sense with regard to the remaining life of the image drum. Before replacing the old toner with new toner, only the cleaning unit of the cartridge needs to be cleaned. It is therefore unnecessary to disassemble the cassette almost completely and therefore costly, as would be necessary if one wanted to seal the toner supply container.

Vorzugsweise ist das Sperrelement eine Folie, beispielsweise ein Silikonpapier.The blocking element is preferably a film, for example a silicone paper.

Üblicherweise besteht die Alttoner-Rückführeinrichtung aus einer ersten Transportschnecke, welche die Wand des Alttonerbehälters durchdringt und Alttoner einer zweiten Transportschnecke zuführt, welche sich quer zur Achse der ersten Transportschnecke erstreckt und den Alttoner einer dritten Transportschnecke zuführt, die parallel zur ersten Transportschnecke liegend die Wand des Tonervorratsbehälters durchdringt.Usually, the waste toner return device consists of a first screw conveyor, which penetrates the wall of the waste toner container and feeds waste toner to a second screw conveyor, which extends transversely to the axis of the first screw conveyor and feeds the waste toner to a third screw conveyor, which lies parallel to the first screw conveyor the wall of the Penetrates the toner reservoir.

Bei einer bevorzugten Ausführungsform liegt das Sperrelement an der dritten Förderschnecke an und unterbricht hier den Transportweg. Eine Unterbrechung des Transportweges an dieser Stelle ist besonders vorteilhaft, weil es genügt, eine Folie auf denjenigen Teil dieser Transportschnecke zu legen, auf den der von der zweiten Transportschnecke zugeführte Toner fällt. Da in der Regel zwischen diesen beiden Transportschnecken ein Dichtkörper angeordnet ist, braucht die Folie nur zwischen den Dichtkörper und die dritte Transportschnecke eingeführt zu werden.In a preferred embodiment, the blocking element bears against the third screw conveyor and interrupts the transport path here. An interruption of the transport route at this point is particularly advantageous because it is sufficient to place a film on that part of this screw conveyor on which the toner supplied from the second screw conveyor falls. Since a sealing body is generally arranged between these two screw conveyors, the film only needs to be inserted between the sealing body and the third screw conveyor.

Die Unterbrechung des Transportweges oder eine zusätzliche Unterbrechung ist aber auch an der ersten Transportschnecke möglich.The interruption of the transport route or an additional interruption is also possible on the first screw conveyor.

Vorzugsweise weist das Sperrelement eine mit den Fingern erfaßbare Abzuglasche auf, die bei Verwendung einer streifenförmigen Folie durch einen Abschnitt des Streifens gebildet sein kann. Der Anwender braucht dann nur die sichtbar unter dem Frontgehäuse herausragende Abzuglasche mit den Fingern zu erfassen und abzuziehen. Das Sperrelement gibt dann den Transportweg frei.The locking element preferably has a trigger tab which can be grasped with the fingers and which can be formed by a section of the strip when using a strip-shaped film. The user then only needs to grasp and pull off the pull tab that is visible under the front housing. The locking element then releases the transport route.

Im folgenden ist die Erfindung anhand von zwei in der Zeichnung dargestellten Ausführungsbeispielen im einzelnen erläutert.
Es zeigen

Fig. 1
eine perspektivisch dargestellte Ansicht des ersten Ausführungsbeispiels,
Fig. 2
eine vergrößert und aufgebrochen dargestellte Ansicht des ersten Ausführungsbeispiels,
Fig. 3
einen unvollständig dargestellten Querschnitt des zweiten Ausführungsbeispiels.
The invention is explained in detail below with reference to two exemplary embodiments shown in the drawing.
Show it
Fig. 1
2 shows a perspective view of the first exemplary embodiment,
Fig. 2
2 shows an enlarged and broken-open view of the first exemplary embodiment,
Fig. 3
an incomplete cross section of the second embodiment.

Eine Kassette für Kopiergeräte oder dergleichen weist ein aus Kunststoff bestehendes Außengehäuse 1 auf, in dem ein Tonervorratsbehälter 2 enthalten ist. In diesen Tonervorratsbehälter 2 ragt eine Magnetwalze 3, mit der Toner auf eine parallel zu ihr angeordnete Bildtrommel 4 aufgebracht werden kann. Auf der der Magnetwalze 3 abgewandten Seite schließt sich an die Bildtrommel 4 eine Trommelreinigungseinheit mit einem Alttonerbehälter 5 an.A cassette for copiers or the like has an outer housing 1 made of plastic, in which a toner reservoir 2 is contained. A magnetic roller 3, with which toner can be applied to an image drum 4 arranged parallel to it, projects into this toner supply container 2. On the side facing away from the magnetic roller 3, the image drum 4 is followed by a drum cleaning unit with an old toner container 5.

Neben der einen Stirnseite des Tonervorratsbehälters 2 und der entsprechenden Stirnseite des Alttonerbehälters 5 liegt eine bei Gebrauch der Kassette über ein Zahnrad 6 angetriebene Alttoner-Rückführschnecke 7, die eines der mechanischen Förderelemente einer Alttoner-Rückführeinrichtung bildet. Dieser Alttoner-Rückführschnecke 7 wird der Alttoner mittels einer ersten Transportschnecke 8 zugeführt, welche eine Öffnung in der Stirnwand des Alttonerbehälters 4 durchdringt und den aus diesem Behälter entnommenen Alttoner auf das dem Zahnrad 6 benachbarte Ende der Alttoner-Rückführschnecke 7 aufgibt.In addition to the one end face of the toner supply container 2 and the corresponding end face of the waste toner container 5, there is a waste toner return screw 7, which is driven by a gear 6 when the cartridge is used, and which forms one of the mechanical conveying elements of a waste toner return device. This waste toner return screw 7 is fed to the waste toner by means of a first transport screw 8, which penetrates an opening in the end wall of the waste toner container 4 and feeds the waste toner removed from this container onto the end of the waste toner return screw 7 adjacent to the gear 6.

Das andere Ende der Alttoner-Rückführschnecke 7 ist oberhalb einer zweiten Transportschnecke 9 angeordnet, welche die Stirnwand des Tonervorratsbehälters 2 durchdringt. Zwischem dem Ende der Alttoner-Rückführschnecke 7 und dem darunter angeordneten Abschnitt der zweiten Transportschnecke 9 ist ein Dichtkörper 10 angeordnet, welcher einen Aufgabetrichter für die zweite Transportschnecke 9 bildet.The other end of the waste toner return screw 7 is arranged above a second transport screw 9, which penetrates the end wall of the toner supply container 2. Between that At the end of the waste toner return screw 7 and the section of the second transport screw 9 arranged underneath, a sealing body 10 is arranged, which forms a feed hopper for the second transport screw 9.

Um die Kassette nach dem Verbrauch der ersten Toner- oder Entwicklerfüllung wieder verwenden zu können, wird in die Oberseite des Außengehäuses 1 oberhalb des Tonervorratsbehälters 2 eine Öffnung 11 eingearbeitet, durch die hindurch der Alttoner entfernt und neuer Toner oder Entwickler eingefüllt werden kann. Die Öffnung 11 wird danach mittels eines Klebestreifens 12 wieder dicht verschlossen. Nach einem Reinigen der Reinigungseinheit und Alttoner-Rückführeinrichtung ist die Kassette wieder voll funktionsfähig.In order to be able to use the cartridge again after the first toner or developer filling has been used up, an opening 11 is worked into the top of the outer housing 1 above the toner supply container 2, through which the waste toner can be removed and new toner or developer can be filled in. The opening 11 is then sealed again by means of an adhesive strip 12. After cleaning the cleaning unit and waste toner return device, the cartridge is fully functional again.

Um zu verhindern, daß beim Transport der Kassette zurück zum Anwender und beim Einsetzen in das Gerät Toner in die Trommelreinigungseinheit und den Alttonerbehälter 5 gelangt und von hier über die Alttoner-Rückführeinrichtung aus der Kassette austreten kann, ist eine beispielsweise aus Silikonpapier bestehende Abdichtfolie 13 zwischen die zweite Transportschnecke 9 und den Dichtkörper 10 eingelegt. Hierdurch wird der Spalt zwischen diesen beiden Bauteilen geschlossen und außerdem der Transportweg der Alttoner-Rückführeinrichtung unterbrochen. Daher kann hier auch während des Transports kein Toner austreten.In order to prevent toner from getting into the drum cleaning unit and the waste toner container 5 when the cassette is transported back to the user and when it is inserted into the device and from here can escape from the cassette via the waste toner return device, a sealing film 13, for example made of silicone paper, is between the second screw conveyor 9 and the sealing body 10 inserted. As a result, the gap between these two components is closed and the transport path of the waste toner return device is also interrupted. Therefore, no toner can escape here even during transport.

Wie Fig.2 zeigt, hat die streifenförmige Absperrfolie 13 eine so große Länge, daß ihr nach unten aus dem Außengehäuse 1 heraushängender Abschnitt als eine Abzugslasche benutzt werden kann, die der Benutzer nur mit den Fingern zu erfassen braucht. Durch einen Zug in Längsrichtung der Abzugslasche wird die Abdichtfolie aus dem Spalt zwischen der zweiten Transportschnecke 9 und dem Abdichtkörper 10 herausgezogen, wodurch der Transportweg der Alttoner-Rückführeinrichtung wieder freigegeben wird.As shown in FIG. 2, the strip-shaped barrier film 13 is so long that its portion hanging down from the outer housing 1 can be used as a pull tab that the user only needs to grasp with his fingers. The sealing film is pulled out of the gap between the second screw conveyor 9 and the sealing body 10 by a pull in the longitudinal direction of the pull tab, which results in the transport path the waste toner return device is released again.

Es wäre auch möglich, eine zweite Absperrfolie zusätzlich oder statt der Absperrfolie 13 zwischen die erste Transportschnecke 8 und die Alttoner-Rückführschnecke 7 einzulegen und dadurch an dieser Stelle den Transportweg der Alttoner-Rückführeinrichtung zu unterbrechen, wodurch ebenfalls ein ungewolltes Austreten des Toners während eines Transportes oder dergleichen verhindert werden würde.It would also be possible to insert a second barrier film in addition to or instead of the barrier film 13 between the first screw conveyor 8 and the waste toner return screw 7 and thereby to interrupt the transport path of the waste toner return device at this point, which likewise causes the toner to escape unintentionally during transport or the like would be prevented.

Das in Fig.3 dargestellte Ausführungsbeispiel einer Kassette für Kopiergeräte oder dergleichen stimmt weitgehend mit dem Ausführungsbeispiel gemäß den Fig.1 und 2 überein, weshalb nur derjenige Teil dargestellt ist, der sich von der Kassette gemäß dem ersten Ausführungsbeispiel teilweise unterscheidet.The exemplary embodiment of a cassette for copying machines or the like shown in FIG. 3 largely corresponds to the exemplary embodiment according to FIGS. 1 and 2, which is why only that part is shown which differs in part from the cassette according to the first exemplary embodiment.

Das Außengehäuse 101 enthält einen Tonervorratsbehälter 102 und neben diesem einen Entwicklervorratsbehälter 114. An seiner Unterseite ist der Tonervorratsbehälter 102 mit einer Auslaßöffnung 102′, der Entwicklervorratsbehälter mit einer Auslaßöffnung 114′ versehen. Bei den bekannten Kassetten sind diese beiden Auslaßöffnungen vor dem erstmaligen Gebrauch der Kassette mit einer Absperrfolie 115 verschlossen, die die Auslaßöffnungen 102′ und 114′ überdeckend an der Unterseite der beiden Vorratsbehälter 102 und 114 anliegt sowie durch einen Schlitz in der Wand des Außengehäuses 101 nach außen geführt ist, um hier zum Zwecke des Abziehens erfaßt werden zu können. Der Schlitz für die Durchführung der Absperrfolie 115 durch die Wand des Gehäuses 101 ist so dimensioniert, daß er durch die Absperrfolie 115 vollständig verschlossen wird. Das andere Ende der Absperrfolie 115 ist an der Unterseite des Entwicklervorratsbehälters 114 festgeklebt.The outer housing 101 contains a toner reservoir 102 and next to this a developer reservoir 114. On its underside, the toner reservoir 102 is provided with an outlet opening 102 ', the developer reservoir with an outlet opening 114'. In the known cassettes, these two outlet openings are closed before the first use of the cassette with a barrier film 115, which covers the outlet openings 102 'and 114' covering the underside of the two storage containers 102 and 114 and through a slot in the wall of the outer housing 101 after is guided outside so that it can be grasped here for the purpose of pulling off. The slot for the passage of the barrier film 115 through the wall of the housing 101 is dimensioned such that it is completely closed by the barrier film 115. The other end of the barrier film 115 is glued to the underside of the developer reservoir 114.

Im Bereich zwischen der Auslaßöffnung 102′ und der Auslaßöffnung 114′ wird die Absperrfolie 115 von einer Tonerfördertrommel 116 an die Unterseite des Tonervorratsbehälters 102 angedrückt. Die Tonerfördertrommel 116 liegt andererseits dicht an einer Trennwand 117 an, welche zusammen mit dem Tonervorratsbehälter 102 und einem Teil der Wand des Außengehäuses 101 einen Tonervorratsraum 118 begrenzt, aus dem der Toner nur dann zu der nicht dargestellten Magnetwalze hinaustreten kann, wenn die Tonerfördertrommel 116 angetrieben wird.In the area between the outlet opening 102 'and the outlet opening 114', the barrier film 115 is pressed by a toner conveying drum 116 onto the underside of the toner reservoir 102. The toner delivery drum 116, on the other hand, lies tightly against a partition wall 117 which, together with the toner storage container 102 and part of the wall of the outer housing 101, delimits a toner storage space 118 from which the toner can only exit to the magnetic roller (not shown) when the toner delivery drum 116 is driven becomes.

Die Oberseite des Tonervorratsbehälters 102 ist nachträglich mit einer Öffnung 111 versehen worden, durch die und die Durchlaßöffnung 102′ hindurch die Absperrfolie 115 mit einem Durchbruch 115′ versehen wird. Durch diesen Durchbruch 115′ hindurch wird zumindest ein Teil des sich im Tonervorratsbehälter 102 befindenden Toners in den Vorratsraum 118 überführt. Sodann wird der Tonervorratsbehälter 102 mit zusätzlichem Toner gefüllt. Danach verschließt man, beispielsweise mittels eines Klebebandes, die Öffnung 111. Die Kassette 101 enthält nun etwa die doppelte Menge Toner im Vergleich zu bekannten Kassetten.The top of the toner reservoir 102 has been subsequently provided with an opening 111 through which and the passage opening 102 'through the barrier film 115 is provided with an opening 115'. Through this breakthrough 115 'at least a portion of the toner located in the toner reservoir 102 is transferred into the reservoir 118. The toner reservoir 102 is then filled with additional toner. The opening 111 is then closed, for example by means of an adhesive tape. The cassette 101 now contains approximately twice the amount of toner compared to known cassettes.

Vor dem erstmaligen Gebrauch der Kassette wird wie bei den bekannten Kassetten die Absperrfolie 115 vollständig aus dem Gehäuse 101 herausgezogen. Dadurch werden die Auslaßöffnungen 114′ und 102′ vollständig freigegeben. Der Entwickler kann dadurch zu der Magnetwalze gelangen und nach Aktivierung der Tonertransportwalze 116 im erforderlichen Maße mit dem Toner vermischt werden. Selbstverständlich kann diese Kassette, falls die Lebensdauer der Bildtrommel dies zulassen sollte, nach dem Verbrauch des gesamten Toners wieder in der in Verbindung mit dem Ausführungsbeispiel gemäß den Fig.1 und 2 beschriebenen Weise betriebsbereit gemacht werden.Before using the cassette for the first time, the barrier film 115 is completely pulled out of the housing 101, as in the known cassettes. As a result, the outlet openings 114 'and 102' are completely released. The developer can thereby reach the magnetic roller and, after activation of the toner transport roller 116, can be mixed with the toner as required. Of course, if the life of the imaging drum should allow this, this cartridge can be made ready for operation again in the manner described in connection with the exemplary embodiment according to FIGS. 1 and 2 after the entire toner has been used up.

Alle in der vorstehenden Beschreibung erwähnten sowie auch die nur allein aus der Zeichnung entnehmbaren Merkmale sind als weitere Ausgestaltungen der beanspruchten Erfindung anzusehen.All of the features mentioned in the above description and also the features that can only be inferred from the drawing are to be regarded as further developments of the claimed invention.

Claims (8)

  1. Cartridge for copying apparatus or the like with
    a) an image drum (4);
    b) a toner supply container (102);
    c) a lockable toner filler aperture (111) in the toner supply container;
    d) a developer supply chamber (114);
    e) a toner outlet aperture (102') from the toner supply container (102) to a toner supply space (118), from which space the toner can emerge only by means of a transporting device (116); and
    f) a detachable foil-type locking component (115) which locks the toner outlet aperture (102') and the outlet aperture (114') of the developer supply chamber, characterised in that:
    a throughput aperture (115') is provided in the locking component (115) in the area of the toner outlet aperture (102'), which throughput aperture is disposed such that it can be produced through the toner filler aperture (111).
  2. Cartridge for copying apparatus or the like with
    a) an image drum (4);
    b) a toner supply container (2);
    c) a used toner container (5); and
    d) a used toner return device (8, 7, 9), characterised in that a lockable toner filler aperture (11) is provided in the toner supply container; and
    in that a detachable foil-type locking component (13) is provided, which interrupts the transport path of the used toner through the return device (8, 7, 9).
  3. Cartridge according to Claim 1, with a used toner container (5) and a used toner return device (7, 8, 9) characterised in that:
    a detachable foil-type locking component (13) is provided, which interrupts the transport path of the used toner through the return device (7, 8, 9).
  4. Cartridge according to Claim 1 or 3, characterised in that in addition to the toner supply container (102), the supply space (118) is also at least partially filled with toner.
  5. Cartridge according to any one of Claims 2, 3 or 4, referring to Claim 1, characterised in that:
    a) one of the mechanical transport components of the used toner return device (7, 8, 9) is a spiral conveyor (8), which penetrates an aperture in the wall of the toner supply container (2);
    b) the locking component (13) rests on the part of the spiral conveyor which projects from the toner supply container (2).
  6. Container according to Claim 5, characterised in that:
    a) a sealing member (10) which forms a duct for the passage of the used toner to the part of the spiral conveyor (9) which is disposed outside the toner supply container (2), is disposed at a slight distance from the spiral conveyor (9);
    b) the locking component (13) is disposed between the sealing member (10) and the spiral conveyor (9) and closes the gap between the sealing member (10) and the spiral conveyor (9).
  7. Cartridge according to any one of Claims 2, 3, 5,6, characterised in that:
    a) one of the mechanical transport components of the used toner return device (7, 8, 9) is a spiral conveyor (9), which penetrates an aperture in the wall of the used toner container (5);
    b) the locking component or a second locking component is disposed on the part of the spiral conveyor (9) which is outside the used toner container (5).
  8. Cartridge according to any one of Claims 1 to 7, characterised in that the locking component (13) has a pull-tab which can be grasped with the fingers.
EP89122263A 1989-06-10 1989-12-02 Cartridge for copying apparatus and the like Expired - Lifetime EP0402525B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89122263T ATE91808T1 (en) 1989-06-10 1989-12-02 CASSETTE FOR COPY MACHINES AND THE LIKE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8907136U 1989-06-10
DE8907136U DE8907136U1 (en) 1989-06-10 1989-06-10 Cassette for copiers etc.

Publications (3)

Publication Number Publication Date
EP0402525A2 EP0402525A2 (en) 1990-12-19
EP0402525A3 EP0402525A3 (en) 1991-03-27
EP0402525B1 true EP0402525B1 (en) 1993-07-21

Family

ID=6839984

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Application Number Title Priority Date Filing Date
EP89122263A Expired - Lifetime EP0402525B1 (en) 1989-06-10 1989-12-02 Cartridge for copying apparatus and the like

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EP (1) EP0402525B1 (en)
AT (1) ATE91808T1 (en)
DE (2) DE8907136U1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828928A (en) * 1990-04-27 1998-10-27 Canon Kabushiki Kaisha Process cartridge mountable in an image forming system and a method for assembling a cleaning device
US5623328A (en) * 1990-04-27 1997-04-22 Canon Kabushiki Kaisha Process cartridge and image forming system on which process cartridge is mountable
EP0485271B1 (en) * 1990-11-06 1997-07-23 Canon Kabushiki Kaisha Process cartridge and image forming apparatus usable therewith
US5294960A (en) * 1990-11-06 1994-03-15 Canon Kabushiki Kaisha Detachable two-frame process cartridge for an image forming apparatus
US5682579A (en) * 1990-11-06 1997-10-28 Canon Kabushiki Kaisha Detachable two-frame process cartridge for an image forming apparatus
FI95083C (en) * 1993-03-26 1995-12-11 Yritysgrafiikka Oy Color Cartridge Cleaner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276192A1 (en) * 1987-01-16 1988-07-27 berolina Schriftbild, Wilcke, Wolff, Busch &amp; Partner KG Method of making throw-away-process-kits for photocopying apparatuses and laser printers reusable

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US4501484A (en) * 1981-08-19 1985-02-26 Ricoh Company, Ltd. Photoconductive element cleaning apparatus and residual toner collecting apparatus
US4894688A (en) * 1987-03-03 1990-01-16 Mita Industrial Co., Ltd. Device for circulating developer
DE8705870U1 (en) * 1987-04-16 1987-11-12 Berolina International Marketing Strategie GmbH, 1000 Berlin Cover for a toner container outlet opening
DE8716525U1 (en) * 1987-12-15 1988-01-28 Keilbach, Manfred, 7102 Weinsberg Cassette for small copiers and low-maintenance laser printers
JP2629945B2 (en) * 1988-02-24 1997-07-16 キヤノン株式会社 Developing device
US4941022A (en) * 1988-11-11 1990-07-10 Konica Corporation Toner recovery device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0276192A1 (en) * 1987-01-16 1988-07-27 berolina Schriftbild, Wilcke, Wolff, Busch &amp; Partner KG Method of making throw-away-process-kits for photocopying apparatuses and laser printers reusable

Also Published As

Publication number Publication date
DE8907136U1 (en) 1989-07-20
EP0402525A2 (en) 1990-12-19
ATE91808T1 (en) 1993-08-15
EP0402525A3 (en) 1991-03-27
DE58904982D1 (en) 1993-08-26

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