EP0676294B1 - Ink jet print cartridge - Google Patents

Ink jet print cartridge Download PDF

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Publication number
EP0676294B1
EP0676294B1 EP95810218A EP95810218A EP0676294B1 EP 0676294 B1 EP0676294 B1 EP 0676294B1 EP 95810218 A EP95810218 A EP 95810218A EP 95810218 A EP95810218 A EP 95810218A EP 0676294 B1 EP0676294 B1 EP 0676294B1
Authority
EP
European Patent Office
Prior art keywords
housing
ink
bore
ink cartridge
print head
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
EP95810218A
Other languages
German (de)
French (fr)
Other versions
EP0676294A2 (en
EP0676294A3 (en
Inventor
Gordian Mächler
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.)
Pelikan Hardcopy Production AG
Original Assignee
Pelikan Hardcopy Production AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pelikan Hardcopy Production AG filed Critical Pelikan Hardcopy Production AG
Publication of EP0676294A2 publication Critical patent/EP0676294A2/en
Publication of EP0676294A3 publication Critical patent/EP0676294A3/en
Application granted granted Critical
Publication of EP0676294B1 publication Critical patent/EP0676294B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure

Definitions

  • a cartridge is known from EP-A-560 729. She has one Front wall of a housing, an opening into which a neck of a Printhead can be inserted sealingly. The stub is closed at the front by a sieve, which when inserted a little bit compressed with an ink-soaked foam body, so that ink is pushed into the nozzle.
  • a sieve which when inserted a little bit compressed with an ink-soaked foam body, so that ink is pushed into the nozzle.
  • this pump makes them more expensive Ink cartridge.
  • An ink cartridge is also known from EP-A-553 535 a housing that is closed on all sides and that has a first opening for Holding a tubular needle of an ink jet printer, and a second opening for the supply of air to the interior of the housing, which contains an ink-soaked foam body.
  • the first opening contains one that acts as a sealing surface 0-ring.
  • There is a film on the outside of the first opening welded on by the tubular needle of the printhead is punctured when inserting the cartridge. Because the piercing the film is done before the needle is sealed by the O-ring ink may leak when the ink cartridge is installed.
  • EP-A-645 243 is also a Ink cartridge known, which also has a housing with a first Has opening in which an elastomeric plug with a blind hole is inserted. A second opening for the supply of air is sealed in the delivery condition by a film, which after the Inserting the cartridge is pierced by a pusher. The The plug is inserted through a hollow needle of the printhead punctured. The hollow needle seals in the plug beforehand, see above that the above problem of ink leakage does not exist.
  • Figure 1 is a cross section through a print head 1 with a replaceable ink cartridge 2 shown.
  • the printhead 1 has a nozzle plate with several narrow nozzles 3, which each a thermoelectric heating element is assigned, and the over Channels 4 are connected to a tubular nozzle 5.
  • the Socket 5 is closed at the top by a sieve 6. Becomes a Heating element is currently heated, a gas bubble forms, and due to the overpressure, an ink droplet becomes from the concerned one Nozzle ejected. After the gas bubble collapses is caused by the surface tension at the nozzle mouth sucked out of the nozzle 5. This mode of operation of the printhead is known.
  • the cartridge 2 is in a rectangular tube Approach 7 of the printhead 1 inserted and with interacting Locking elements 8, 9 secured.
  • the cartridge 2 consists of a housing 15 and a cover 16.
  • the bottom 17 of the housing 15 has a stepped bore 18, in which is an elastomeric sealing plug 19 with a tubular wall 20 and a cover 21 integrally connected thereto is.
  • the cover 21 has predetermined breaking notches 22, which are shown in FIG Example are star-shaped.
  • the ventilation opening is formed by a capillary gap between a relatively long bore 28 of the housing 15, in which a slightly smaller diameter mandrel 29 of the cover 16 is inserted.
  • the lid 21 is closed and the lid 21 only through the Stub 5 is broken after the wall 20 of the sealing plug 19 sealed against the nozzle 5, there is a simple and safe handling.
  • no opening needs to be cleared (e.g. by removing a sealing film). It is therefore not a drop from one Opening possible.
  • the filter 25 reliably prevents entry any contamination of the ink in the nozzle 5 and thus into the narrow nozzles of the nozzle plate 3. It diminishes also the accumulation of particles on the screen 6 of the head 1, what is the flow resistance through the strainer over time would increase. This will increase the life of the printhead 1 elevated.
  • the sealing plug 19 can also from this Material consist and injection molded in one piece with the housing 15 his.
  • the sealing plug is 19th sleeve-shaped and has no lid 21 Inside a pin 33 is inserted, on the top has a tab 34 projecting on one side. The free end 35 of the tab 34 is connected to the bottom 17 of the housing 15, e.g. welded.
  • Tab 34 prevents it from being flat when the nozzle is inserted whose face can rest and clog it.
  • the embodiment according to FIG. 5 is an air inlet into the anteroom 23 completely avoided when inserting the socket 5.
  • the bore 28 is behind extended below and the mandrel 29 formed on the print head 1.
  • the bore 28 In front the insertion of the cartridge 2 is the bore 28 through a thin Membrane 40 closed, which when inserted through the mandrel 29 pierce immediately before the latching elements 8, 9 engage becomes.
  • the mandrel 29 has a longitudinal groove 41, at the upper end a connection of the capillary gap between bore 28 and Ensure mandrel 29 and the cavity 27. Otherwise, the Embodiment according to Figure 6 formed the same as that of Figures 1 or 5.
  • the bore is new 28 closed at the lower end with an elastomeric pin 42, when inserting the cartridge 2 through the front end the mandrel 29 immediately before the latching elements 8 engage, 9 is pushed out of the bore 28 into the cavity 27.
  • the Pin 42 acts when cartridge 2 is inserted into printhead 1 as a piston. This can result in a higher one when the cartridge is inserted Overpressure are generated, and thus the nozzle even better be filled. This makes it possible to start a rinsing process waive in the printer before the printhead starts operating again is taken.
  • Deviating from the described embodiment may be at the top Be an end of the mandrel 29 an O-ring attached when inserting the cartridge 2 seals against the bore 28 and at complete inserted cartridge protrudes into the cavity 27.
  • the vestibule can also open other ink cartridges 26 is not closed by a cover 21 or 33, be used sensibly with a corresponding effect.

Landscapes

  • Ink Jet (AREA)

Description

Eine Patrone ist aus der EP-A-560 729 bekannt. Sie hat an einer Stirnwand eines Gehäuses eine Öffnung, in welche ein Stutzen eines Druckkopfs abdichtend eingesteckt werden kann. Der Stutzen ist stirnseitig durch ein Sieb abgeschlossen, das beim Einsetzen einen mit Tinte getränkten Schaumkörper etwas komprimiert, so dass Tinte in den Stutzen gedrückt wird. Es hat sich allerdings gezeigt, dass dies gelegentlich nicht ausreicht, so dass in der EP-A-560 729 zusätzlich vorgeschlagen wird, im Gehäuse zusätzlich eine Pumpe einzubauen. Diese Pumpe verteuert allerdings die Tintenpatrone.A cartridge is known from EP-A-560 729. She has one Front wall of a housing, an opening into which a neck of a Printhead can be inserted sealingly. The stub is closed at the front by a sieve, which when inserted a little bit compressed with an ink-soaked foam body, so that ink is pushed into the nozzle. However, it did shown that this is sometimes not sufficient, so that in the EP-A-560 729 is additionally proposed in the housing additionally to install a pump. However, this pump makes them more expensive Ink cartridge.

Aus der EP-A-553 535 ist ferner eine Tintenpatrone bekannt mit einem allseits geschlossenen Gehäuse, das eine erste Öffnung zur Aufnahme einer rohrförmigen Nadel eines Ink-Jet-Printers hat, sowie eine zweite Öffnung für die Zufuhr von Luft zum Innenraum des Gehäuses, der einen mit Tinte getränkten Schaumkörper enthält. Die erste Öffnung enthält einen als Dichtfläche wirkenden 0-Ring. Auf der Aussenseite der ersten Öffnung ist eine Folie aufgeschweisst, die durch die rohrförmige Nadel des Druckkopfs beim Einsetzen der Patrone durchstochen wird. Da das Durchstechen der Folie erfolgt, bevor die Nadel durch den O-Ring abgedichtet ist, kann beim Einsetzen der Tintenpatrone Tinte auslaufen.An ink cartridge is also known from EP-A-553 535 a housing that is closed on all sides and that has a first opening for Holding a tubular needle of an ink jet printer, and a second opening for the supply of air to the interior of the housing, which contains an ink-soaked foam body. The first opening contains one that acts as a sealing surface 0-ring. There is a film on the outside of the first opening welded on by the tubular needle of the printhead is punctured when inserting the cartridge. Because the piercing the film is done before the needle is sealed by the O-ring ink may leak when the ink cartridge is installed.

Aus der nicht vorveröffentlichten EP-A-645 243 ist ferner eine Tintenpatrone bekannt, die ebenfalls ein Gehäuse mit einer ersten Öffnung hat, in der ein elastomerer Stopfen mit einem Sackloch eingesetzt ist. Eine zweite Öffnung für die Zufuhr von Luft ist im Lieferzustand durch eine Folie verschlossen, die nach dem Einsetzen der Patrone durch einen Drücker durchstossen wird. Der Stopfen wird beim Einsetzen durch eine Hohlnadel des Druckkopfs durchstochen. Die Hohlnadel dichtet im Stopfen vorgängig ab, so dass das obige Problem des Auslaufens von Tinte nicht besteht.From the unpublished EP-A-645 243 is also a Ink cartridge known, which also has a housing with a first Has opening in which an elastomeric plug with a blind hole is inserted. A second opening for the supply of air is sealed in the delivery condition by a film, which after the Inserting the cartridge is pierced by a pusher. The The plug is inserted through a hollow needle of the printhead punctured. The hollow needle seals in the plug beforehand, see above that the above problem of ink leakage does not exist.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Tintenpatrone der eingangs genannten Art derart auszubilden, dass sie in der Handhabung einfacher und sicherer ist. Diese Aufgabe wird durch die Merkmalskombination der Ansprüche gelöst. Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen erläutert. Darin zeigt:

Figur 1
einen Querschnitt durch einen Druckkopf und eine Tintenpatrone.
Figur 2
eine perspektivische Darstellung der Einzelteile,
Figur 3
einen Schnitt durch den Stopfen,
Figur 4
eine Stirnansicht, und
Figuren 5 bis 7
drei weitere Ausführungsformen.
The present invention has for its object to design an ink cartridge of the type mentioned in such a way that it is easier and safer to handle. This object is achieved by the combination of features of the claims. An exemplary embodiment of the invention is explained below with reference to the drawings. It shows:
Figure 1
a cross section through a printhead and an ink cartridge.
Figure 2
a perspective view of the individual parts,
Figure 3
a cut through the stopper,
Figure 4
a front view, and
Figures 5 to 7
three other embodiments.

In Figur 1 ist ein Querschnitt durch einen Druckkopf 1 mit einer auswechselbaren Tintenpatrone 2 dargestellt. Der Druckkopf 1 hat eine Düsenplatte mit mehreren engen Düsen 3, welchen je ein thermoelektrisches Heizelement zugeordnet ist, und die über Kanäle 4 mit einem rohrförmigen Stutzen 5 verbunden sind. Der Stutzen 5 ist oben durch ein Sieb 6 abgeschlossen. Wird ein Heizelement momentan erhitzt, bildet sich eine Gasblase, und durch den Ueberdruck wird ein Tintentröpfchen aus der betreffenden Düse ausgestossen. Nach dem Kollabieren der Gasblase wird durch die Oberflächenspannung an der Düsenmündung Tinte aus dem Stutzen 5 nachgesaugt. Diese Wirkungsweise des Druckkopfs ist bekannt. Die Patrone 2 ist in einen rechteckrohrförmigen Ansatz 7 des Druckkopfs 1 eingesteckt und mit zusammenwirkenden Rastelementen 8, 9 gesichert. In Figure 1 is a cross section through a print head 1 with a replaceable ink cartridge 2 shown. The printhead 1 has a nozzle plate with several narrow nozzles 3, which each a thermoelectric heating element is assigned, and the over Channels 4 are connected to a tubular nozzle 5. The Socket 5 is closed at the top by a sieve 6. Becomes a Heating element is currently heated, a gas bubble forms, and due to the overpressure, an ink droplet becomes from the concerned one Nozzle ejected. After the gas bubble collapses is caused by the surface tension at the nozzle mouth sucked out of the nozzle 5. This mode of operation of the printhead is known. The cartridge 2 is in a rectangular tube Approach 7 of the printhead 1 inserted and with interacting Locking elements 8, 9 secured.

Die Patrone 2 besteht aus einem Gehäuse 15 und einem Deckel 16. Der Boden 17 des Gehäuses 15 hat eine abgestufte Bohrung 18, in die ein elastomerer Dichtstopfen 19 mit einer rohrförmigen Wand 20 und einem einstückig damit verbundenen Deckel 21 eingesetzt ist. Der Deckel 21 hat Sollbruchkerben 22, die im dargestellten Beispiel sternförmig ausgebildet sind. Beim Einsetzen der Patrone 2 in den Druckkopf 1 dichtet die Innenseite 26 der Wand 20 gegenüber dem Stutzen 5 ab, bevor der Deckel 21 durch das Stirnende des Stutzens 5 durchstossen wird. Anschliessend ragt das Sieb 6 in einen mit freier Tinte gefüllten Vorraum 23, der gegenüber einem tintegetränkten Schaumkörper 24 durch ein Filter 25 abgegrenzt ist. An der dem Vorraum 23 gegenüberliegenden Kante des Gehäuses 15 ist ein weiterer, kleiner Hohlraum 27 gebildet, der durch eine Belüftungsöffnung belüftet ist. Die Belüftungsöffnung wird gebildet durch einen kapillaren Spalt zwischen einer relativ langen Bohrung 28 des Gehäuses 15, in welche ein im Durchmesser geringfügig kleinerer Dorn 29 des Dekkels 16 eingesteckt ist.The cartridge 2 consists of a housing 15 and a cover 16. The bottom 17 of the housing 15 has a stepped bore 18, in which is an elastomeric sealing plug 19 with a tubular wall 20 and a cover 21 integrally connected thereto is. The cover 21 has predetermined breaking notches 22, which are shown in FIG Example are star-shaped. When inserting the cartridge 2 in the print head 1 seals the inside 26 of the wall 20 compared to the nozzle 5 before the lid 21 through the Front end of the nozzle 5 is pierced. Then protrudes the screen 6 in an antechamber 23 filled with free ink, the compared to an ink-soaked foam body 24 through a filter 25 is delimited. At the anteroom 23 opposite Another small cavity 27 is formed on the edge of the housing 15, which is ventilated through a ventilation opening. The ventilation opening is formed by a capillary gap between a relatively long bore 28 of the housing 15, in which a slightly smaller diameter mandrel 29 of the cover 16 is inserted.

Weil die Patrone 2 zu Beginn des Einsetzens in den Kopf 1 durch den Deckel 21 verschlossen ist und der Deckel 21 erst durch den Stutzen 5 durchbrochen wird, nachdem die Wand 20 des Dichtstopfens 19 gegenüber dem Stutzen 5 gedichtet hat, ergibt sich eine einfache und sichere Handhabung. Vor dem Einsetzen der Patrone 2 muss keine Oeffnung freigemacht werden (z.B. durch Entfernen einer Siegelfolie). Es ist daher kein Tropfen aus einer Oeffnung möglich. Das Filter 25 verhindert zuverlässig den Eintritt allfälliger Verunreinigungen der Tinte in den Stutzen 5 und damit in die engen Düsen der Düsenplatte 3. Es verringert auch die Kumulation von Partikeln auf dem Sieb 6 des Kopfes 1, was den Durchfluss-Widerstand durch das Sieb mit der Zeit erhöhen würde. Dadurch wird die Lebensdauer des Druckkopfs 1 erhöht. Durch die lange Bohrung 28 und den Dorn 29 wird auf einfache Weise eine genau dimensionierbare, enge, kapillare Luftzufuhröffnung gebildet, die anders spritzgiesstechnisch nur schwer zu realisieren wäre. Durch die enge kapillare Belüftungsöffnung wird ein Verdunsten der Tinte weitgehend vermieden.Because the cartridge 2 passes through at the beginning of the insertion into the head 1 the lid 21 is closed and the lid 21 only through the Stub 5 is broken after the wall 20 of the sealing plug 19 sealed against the nozzle 5, there is a simple and safe handling. Before inserting the cartridge 2 no opening needs to be cleared (e.g. by removing a sealing film). It is therefore not a drop from one Opening possible. The filter 25 reliably prevents entry any contamination of the ink in the nozzle 5 and thus into the narrow nozzles of the nozzle plate 3. It diminishes also the accumulation of particles on the screen 6 of the head 1, what is the flow resistance through the strainer over time would increase. This will increase the life of the printhead 1 elevated. Through the long bore 28 and the mandrel 29 is on simple way a precisely dimensionable, narrow, capillary Air supply opening formed, the other injection molding only would be difficult to achieve. Through the narrow capillary ventilation opening evaporation of the ink is largely avoided.

Falls das Gehäuse 15 aus einem relativ weichen Thermoplasten spritzgegossen wird, kann der Dichtstopfen 19 auch aus diesem Material bestehen und einstückig mit dem Gehäuse 15 spritzgegossen sein.If the housing 15 is made of a relatively soft thermoplastic is injection molded, the sealing plug 19 can also from this Material consist and injection molded in one piece with the housing 15 his.

Bei den nachfolgend beschriebenen Ausführungsbeispielen sind analoge Teile mit gleichen Bezugszeichen versehen, sodass sich eine detaillierte Erläuterung dieser Teile erübrigt.In the embodiments described below Provide the same parts with the same reference numerals so that a detailed explanation of these parts is unnecessary.

Bei der Ausführungsform nach Figur 5 ist der Dichtstopfen 19 hülsenförmig und hat keinen Deckel 21. Dafür ist in ihn von der Innenseite her ein Zapfen 33 eingesteckt, der auf der Oberseite einen einseitig abstehenden Lappen 34 hat. Das freie Ende 35 des Lappens 34 ist mit dem Boden 17 des Gehäuses 15 verbunden, z.B. verschweisst. Beim Einstecken des Stutzens 5 schiebt dessen Stirnende den Zapfen 33 vor sich her in den Vorraum 23. Der Lappen 34 verhindert, dass er bei eingeführtem Stutzen plan auf dessen Stirnfläche aufliegen und ihn verstopfen kann. Mit der Ausführungsform nach Figur 5 wird ein Lufteintritt in den Vorraum 23 beim Einstecken des Stutzens 5 vollständig vermieden.In the embodiment according to FIG. 5, the sealing plug is 19th sleeve-shaped and has no lid 21 Inside a pin 33 is inserted, on the top has a tab 34 projecting on one side. The free end 35 of the tab 34 is connected to the bottom 17 of the housing 15, e.g. welded. When inserting the nozzle 5 pushes it Forehead the pin 33 in front of him in the vestibule 23 Tab 34 prevents it from being flat when the nozzle is inserted whose face can rest and clog it. With the The embodiment according to FIG. 5 is an air inlet into the anteroom 23 completely avoided when inserting the socket 5.

Bei der Ausführungsform nach Figur 6 ist die Bohrung 28 nach unten verlängert und der Dorn 29 am Druckkopf 1 angeformt. Vor dem Einsetzen der Patrone 2 ist die Bohrung 28 durch eine dünne Membran 40 verschlossen, die beim Einsetzen durch den Dorn 29 unmittelbar vor dem Einrasten der Rastelemente 8, 9 durchstossen wird. Der Dorn 29 hat am oberen Ende eine Längsnut 41, um eine Verbindung des kapillaren Spaltes zwischen Bohrung 28 und Dorn 29 und dem Hohlraum 27 sicherzustellen. Im übrigen ist die Ausführungsform nach Figur 6 gleich ausgebildet wie jene nach Figuren 1 oder 5.In the embodiment according to FIG. 6, the bore 28 is behind extended below and the mandrel 29 formed on the print head 1. In front the insertion of the cartridge 2 is the bore 28 through a thin Membrane 40 closed, which when inserted through the mandrel 29 pierce immediately before the latching elements 8, 9 engage becomes. The mandrel 29 has a longitudinal groove 41, at the upper end a connection of the capillary gap between bore 28 and Ensure mandrel 29 and the cavity 27. Otherwise, the Embodiment according to Figure 6 formed the same as that of Figures 1 or 5.

Dadurch, dass der Stutzen 5 des Druckkopfs 1 in den Vorraum 23 eindringt, bevor die Entlüftungsöffnung geöffnet ist, entsteht in der Patrone 2 ein kleiner Ueberdruck, welcher bewirkt, dass der Stutzen 5 des Kopfs 1 zumindest teilweise mit Tinte gefüllt wird, was die Wiederinbetriebnahme des Druckkopfs 1 erleichtert.Characterized in that the nozzle 5 of the print head 1 in the vestibule 23 penetrates before the vent is opened in the cartridge 2 a small excess pressure, which causes the nozzle 5 of the head 1 is at least partially filled with ink becomes, which facilitates the restarting of the print head 1.

Bei der Ausführungsform nach Figur 7 ist im Neuzustand die Bohrung 28 am unteren Ende mit einem elastomeren Zapfen 42 verschlossen, der beim Einsetzen der Patrone 2 durch das Stirnende des Dorns 29 unmittelbar vor dem Einrasten der Rastelemente 8, 9 aus der Bohrung 28 in den Hohlraum 27 geschoben wird. Der Zapfen 42 wirkt beim Einsetzen der Patrone 2 in den Druckkopf 1 als Kolben. Dadurch kann beim Einsetzen der Patrone ein höherer Ueberdruck erzeugt werden, und somit der Stutzen noch besser gefüllt werden. Dadurch wird es möglich, auf einen Spülprozess im Drucker zu verzichten, bevor der Druckkopf wieder in Betrieb genommen wird.In the embodiment according to FIG. 7, the bore is new 28 closed at the lower end with an elastomeric pin 42, when inserting the cartridge 2 through the front end the mandrel 29 immediately before the latching elements 8 engage, 9 is pushed out of the bore 28 into the cavity 27. The Pin 42 acts when cartridge 2 is inserted into printhead 1 as a piston. This can result in a higher one when the cartridge is inserted Overpressure are generated, and thus the nozzle even better be filled. This makes it possible to start a rinsing process waive in the printer before the printhead starts operating again is taken.

Abweichend von der beschriebenen Ausführungsform kann am oberen Ende des Dorns 29 ein O-Ring befestigt sein, der beim Einsetzen der Patrone 2 gegenüber der Bohrung 28 abdichtet und bei vollständig eingesetzter Patrone in den Hohlraum 27 ragt.Deviating from the described embodiment may be at the top Be an end of the mandrel 29 an O-ring attached when inserting the cartridge 2 seals against the bore 28 and at complete inserted cartridge protrudes into the cavity 27.

Der enge, kapillare Spalt gebildet durch die relativ lange Bohrung 28 und den eingesetzten Dorn 29, aber auch die Abgrenzung des Stutzens 5 vom Schaumkörper 24 durch ein Filter 25 und einen Vorraum können auch bei anderen Tintenpatronen, deren Oeffnung 26 nicht durch einen Deckel 21 bzw. 33 abgeschlossen ist, sinnvoll mit entsprechender Wirkung eingesetzt werden.The narrow, capillary gap formed by the relatively long bore 28 and the mandrel 29 used, but also the delimitation of the nozzle 5 from the foam body 24 through a filter 25 and The vestibule can also open other ink cartridges 26 is not closed by a cover 21 or 33, be used sensibly with a corresponding effect.

Claims (8)

  1. Ink cartridge for a print head of an ink jet printer, including a housing (15, 16) closed on all sides with a first opening (26) for receiving a tubular connection piece (5) of the print head (1) and a second opening (28, 29) for supplying air to the interior of the housing (15, 16), wherein the interior contains ink, the first opening is closed within a bore acting as a sealing surface (26) by a cover (21, 33) opened when the connection piece (5) pushes therethrough, and either the cover (21) is moulded in one piece with the sealing surface (26) and has predetermined breaking notches (22) or the cover is in the form of a pin (33) inserted into the bore (26) and secured to the housing (15) on the inside on one side via a tab (34).
  2. Ink cartridge according to claim 1, wherein the sealing surface (26) and the cover (21) are formed on an elastomeric stopper (20) inserted into a housing bore (18).
  3. Ink cartridge according to claim 1 or claim 2, wherein a prechamber (23) filled with spare ink is arranged on the inside of the cover (21, 33).
  4. Ink cartridge according to claim 3, wherein the interior of the housing (15, 16) contains a foam body (24) impregnated with ink and delimited relative to the prechamber (23) by a filter (25).
  5. Ink cartridge according to one of claims 1 - 4, wherein the housing (15, 16) consists of two parts, namely a housing body (15) and a cover element (16), and the second opening is formed by an elongated bore (28) in one of the parts (15) into which a plug (29) moulded on to the other part (16) is inserted with little play.
  6. Print head having an ink cartridge according to one of claims 1 - 4, wherein the second opening is formed by an elongated bore (28) in the housing (15, 16) into which a plug (29) moulded on to the print head (1) is inserted with little play when the cartridge (2) is inserted.
  7. Print head having an ink cartridge according to claim 6, wherein the bore (28) is closed in the new state by a membrane (40) which is pierced by the front end of the plug (29) when the cartridge (2) is inserted.
  8. Print head having an ink cartridge according to claim 6, wherein the plug (29) acts as a piston rod when the cartridge is inserted, pushing a sealing element (42) along the bore (28) into a cavity (27) in the housing (15, 16) and acting as a pump member.
EP95810218A 1994-04-06 1995-04-04 Ink jet print cartridge Expired - Lifetime EP0676294B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9405723U 1994-04-06
DE9405723U DE9405723U1 (en) 1994-04-06 1994-04-06 Ink cartridge for a printhead of an ink jet printer

Publications (3)

Publication Number Publication Date
EP0676294A2 EP0676294A2 (en) 1995-10-11
EP0676294A3 EP0676294A3 (en) 1998-01-07
EP0676294B1 true EP0676294B1 (en) 2001-09-26

Family

ID=6906984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810218A Expired - Lifetime EP0676294B1 (en) 1994-04-06 1995-04-04 Ink jet print cartridge

Country Status (3)

Country Link
US (1) US6074049A (en)
EP (1) EP0676294B1 (en)
DE (2) DE9405723U1 (en)

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Also Published As

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EP0676294A2 (en) 1995-10-11
EP0676294A3 (en) 1998-01-07
DE9405723U1 (en) 1994-06-01
US6074049A (en) 2000-06-13
DE59509626D1 (en) 2001-10-31

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