EP2214907A1 - Ink cartridge, especially for an ink jet printer - Google Patents

Ink cartridge, especially for an ink jet printer

Info

Publication number
EP2214907A1
EP2214907A1 EP08851980A EP08851980A EP2214907A1 EP 2214907 A1 EP2214907 A1 EP 2214907A1 EP 08851980 A EP08851980 A EP 08851980A EP 08851980 A EP08851980 A EP 08851980A EP 2214907 A1 EP2214907 A1 EP 2214907A1
Authority
EP
European Patent Office
Prior art keywords
ink
volume
capillary
ink cartridge
opening
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
EP08851980A
Other languages
German (de)
French (fr)
Other versions
EP2214907B1 (en
Inventor
Daniel Sulser
René Butty
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 EP2214907A1 publication Critical patent/EP2214907A1/en
Application granted granted Critical
Publication of EP2214907B1 publication Critical patent/EP2214907B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B41J2/17556—Means for regulating the pressure in the cartridge
    • 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

  • the invention relates to an ink cartridge, in particular for an ink jet printer, having an ink reservoir which limits a free ink volume in a first chamber and a capillary volume in a second chamber, wherein the two chambers are fluidly connected to each other, and wherein the capillary volume limiting chamber is associated with an ink outlet ,
  • Such so-called dual-chamber ink cartridges are well known, with one chamber primarily containing liquid ink and the other having an ink storage element defining a capillary volume, e.g. made of sponge or fiber material is filled. It is important, a controlled emptying of the two chambers in use of the ink cartridge, for. to ensure in an inkjet printer. Conventionally, the removal amount from both chambers is about the same. At the beginning, about 1/4 of the amount of ink taken is taken from the capillary volume. Then, the removal of about 1/2 of the total amount from the ink chamber or from the free ink volume limiting chamber takes place. Lastly, another 1/4 of the total amount is taken from the capillary volume.
  • the ventilation and thus pressure compensation takes place through the capillary volume. If the capillary volume is emptied approximately halfway, an opening for aeration of the chamber bounding the free ink volume is released by the sunken filling level. In this way, then this chamber can be vented through the storage element or the capillary volume.
  • the disadvantage is that two different storage materials for the capillary volume are required, namely a first large-pore upper storage material which is first discharged, and a second lower-volume storage material near the ink outlet with smaller pores. Only by this constellation ventilation of the two chambers of the ink cartridge is reliably possible.
  • the two chambers are fluidly connected, via a near-ground passage in an intermediate wall, through which the two chambers are separated from each other within the ink cartridge.
  • the present invention has for its object to provide an ink cartridge in which one manages with a single storage material for defining the capillary volume, i. with a storage material of uniform pore size. Furthermore, the pressure equalization should be facilitated by the fact that it does not have to be controlled by the capillary volume.
  • the free-ink chamber is ventilated, wherein additionally a separate ventilation of the capillary volume or of the chamber delimiting the capillary volume is provided.
  • the ventilation of the free ink volume limiting chamber is carried out according to the invention by an outgoing from the top wall of the cartridge immersion tube, which has one or more very small, preferably slot-shaped openings at the immersed distal end. Due to the size of these openings can be the
  • a slot-shaped opening has the further advantage compared to a hole-shaped opening that it is much less sensitive to dirt particles and accordingly more efficient with respect to the air flow rate.
  • the bubble generator according to the invention in the form of a dip tube ensures that the ventilation and consequently the emptying of the two chambers is controlled by the design of the bubble generator and not by the capillary volume or the capillary volume defining material.
  • the capillary volume is formed by a uniform material of constant pore size.
  • the solution according to the invention is characterized by a simpler and, accordingly, more cost-effective and, with regard to the emptying of the ink cartridge, a particularly functionally reliable construction.
  • dip tube defining the bubble generator extends close to the bottom wall of the ink cartridge, at least to about the height of the fluid communication between the two chambers.
  • the ventilation openings formed there are arranged one inside the other, so that an inner opening and an annular opening surrounding this outer opening is formed.
  • the latter communicates with the chamber delimiting the capillary volume via at least one air channel formed in the cover wall, while the inner central opening communicates with the bubble generator or the dip tube defining it via a further air channel formed in the cover wall.
  • Fig. 1 is an inventively designed ink cartridge in perspective
  • the front side wall includes a cutout
  • Fig. 2 is a view corresponding to Figure 1, only obliquely from below.
  • FIG. 3 the detail III in FIG. 2 on an enlarged scale
  • FIG. 4 shows the ink cartridge according to FIG. 1 or FIG. 2 before use in perspective view
  • FIG. 5 the ink cartridge of FIG. 4 in longitudinal section.
  • the ink cartridge shown in Figures 1, 2 and 4, 5 is designated by the reference numeral 10. It comprises four side walls, namely two opposite flat side walls 11 and two opposite end walls 12, and a top wall 13 and bottom wall 14.
  • two chambers are formed, lent a first chamber 17, which limits a so-called free ink volume 16, and a second chamber 18 which defines a so-called capillary volume 15.
  • This capillary volume 15 is defined by an ink storage element in the form of an open-pore sponge or fiber material.
  • This memory element or the capillary volume 15 is associated with an ink outlet 21 on the bottom side.
  • the two chambers are separated within the cartridge by a partition 19 from each other.
  • the partition 19 has a fluid passage 20 between the two chambers 17 and 18.
  • the cover wall 13 is formed as a separate component and comprises two ventilation openings 23, 24, which are arranged one inside the other.
  • An inner ventilation opening 23 is surrounded annularly by an outer ventilation opening 24.
  • the inner ventilation opening is in fluid communication via an air duct 25 formed in the cover wall 13 with the first chamber 17 which bounds the free ink volume 16, while the outer ventilation opening 24 is connected to the second chamber via a separate air duct 26 likewise formed in the cover wall 13 Chamber 18, which limits the capillary volume 15, is in communication.
  • This channel opens into the second chamber 18 via an opening 27 on the underside of the cover wall 13.
  • the first air channel 25 opens through an opening 28 on the underside of the top wall 13 in the first chamber 17, not directly, but via a formed as a bubble generator dip tube 29. So this extends from the bottom of the top wall 13 down into the the free ink volume 16 limiting first chamber 17 into it.
  • a formed as a bubble generator dip tube 29 At the distal end of the dip tube 29 at least one opening 30 is formed for the introduction of air bubbles in the free ink.
  • this opening in the illustrated embodiment comprises two relative to the tube longitudinal axis diametrically opposed slot openings, of which in the figures 2 and 3 each only one can be seen.
  • the size of these slit openings 30 at the distal end of the dip tube 29 is dimensioned such that when using the ink cartridge, the ink only after about 1/4 of the capillary volume has been consumed through this opening 30 through air sucking fine bubbles into the free ink volume into it ,
  • the bubble generator thus formed defines a capillary pressure which is preferably less than the capillary pressure at the ink outlet 21 but greater than the capillary pressure at the capillary volume 15. It should also be noted that capillary pressure at the ink outlet is provided by a wick disposed within the ink outlet Foam or fibrous material is defined. This wick has a higher density and thus smaller pore size than the storage material which defines the capillary volume 15.
  • the slot-shaped openings 30 are set at the distal end of the dip tube 29 so that the capillary pressure of the bubble generator to a maximum of about 150%, in particular between about 50% and 150% greater than the capillary pressure with filled capillary 15.
  • the two ventilation openings 23, 24 on the one hand and the ink outlet 21 on the other hand is still a common remove film 22 assigned. Before using the cartridge 10, this remove film is peeled off. Due to the above-described design of the two ventilation openings 23, 24 is always ensured that first the capillary volume limiting chamber 18, and only then the free ink volume limiting chamber 17 are vented. In this way it is prevented that unintentionally squirts ink out of the associated with the first chamber 17 ventilation opening 23 during pressure compensation.
  • the two aforementioned air channels 25, 26 are formed on the top of the top wall 13, in particular milled. They are closed by a cover sheet 31.
  • Measures for fixing the ink cartridge 10 within a receptacle of the inkjet printer are also formed on the side wall opposite the end wall 12 over which the remove film 22 extends. These are per se known measures that need not be described in detail here.

Abstract

The invention relates to an ink cartridge (10) with an ink reservoir which delimits a free ink volume (16) in a first compartment (17) and a capillary volume (15) in a second compartment (18), the compartments (17, 18) being fluidically interconnected and the compartment (18) delimiting the capillary volume (15) being associated with an ink outlet (21). The invention is characterized by a bubble generator in the form of a dip tube (29) that dips into the free ink volume (16) and that can be connected to the exterior, at least one opening (30) for the introduction of air bubbles being provided at the distal end thereof.

Description

'Tintenpatrone, insbesondere für Tintenstrahldrucker" 'Ink Cartridge, especially for Inkjet Printers'
B e s c h r e i b u n gDescription
Die Erfindung betrifft eine Tintenpatrone, insbesondere für einen Tintenstrahldrucker, mit einem Tintenreservoir, welches in einer ersten Kammer ein Freitintenvolumen und in einer zweiten Kammer ein Kapillarvolumen begrenzt, wobei die beiden Kammern miteinander fluidverbunden sind, und wobei der das Kapillarvolumen begrenzenden Kammer ein Tintenauslaß zugeordnet ist.The invention relates to an ink cartridge, in particular for an ink jet printer, having an ink reservoir which limits a free ink volume in a first chamber and a capillary volume in a second chamber, wherein the two chambers are fluidly connected to each other, and wherein the capillary volume limiting chamber is associated with an ink outlet ,
Derartige sogenannte Zweikammer-Tintenpatronen sind allgemein bekannt, wobei die eine Kammer vorwiegend mit Flüssigtinte und die andere mit einem ein Kapillarvolumen definierendes Tintenspeicherelement, z.B. aus Schwamm- oder Fasermaterial gefüllt ist. Dabei gilt es, eine kontrollierte Entleerung der beiden Kammern bei Gebrauch der Tintenpatrone z.B. in einem Tintenstrahldrucker zu gewährleisten. Herkömmlich ist die Entnahmemenge aus beiden Kammern etwa gleich. Zu Beginn wird etwa 1 /4 der Tintenent- nahmemenge aus dem Kapillarvolumen entnommen. Dann erfolgt die Entnahme von etwa 1/2 der Gesamtmenge aus der Tintenkammer bzw. aus der das Freitintenvolumen begrenzenden Kammer. Zu guter Letzt wird ein weiteres 1/4 der Gesamtmenge aus dem Kapillarvolumen entnommen.Such so-called dual-chamber ink cartridges are well known, with one chamber primarily containing liquid ink and the other having an ink storage element defining a capillary volume, e.g. made of sponge or fiber material is filled. It is important, a controlled emptying of the two chambers in use of the ink cartridge, for. to ensure in an inkjet printer. Conventionally, the removal amount from both chambers is about the same. At the beginning, about 1/4 of the amount of ink taken is taken from the capillary volume. Then, the removal of about 1/2 of the total amount from the ink chamber or from the free ink volume limiting chamber takes place. Lastly, another 1/4 of the total amount is taken from the capillary volume.
In der Regel erfolgt die Belüftung und damit Druckkompensation durch das Kapillarvolumen hindurch. Ist das Kapillarvolumen etwa zur Hälfte entleert, wird durch den ge- sunkenen Füllstand eine Öffnung zur Belüftung der das Freitintenvolumen begrenzenden Kammer freigegeben. Auf diese Weise kann dann diese Kammer durch das Speicherelement bzw. das Kapillarvolumen hindurch belüftet werden. Nachteilig ist, daß zwei verschiedene Speichermaterialien für das Kapillarvolumen erforderlich sind, und zwar ein erstes Speichermaterial für den oberen Bereich mit großen Poren, welches als erstes entleert wird, und ein zweites Speichermaterial für den unteren Bereich der Patrone nahe dem Tintenauslaß mit kleineren Poren. Nur durch diese Konstellation ist eine Belüftung der beiden Kammern der Tintenpatrone zuverlässig möglich.As a rule, the ventilation and thus pressure compensation takes place through the capillary volume. If the capillary volume is emptied approximately halfway, an opening for aeration of the chamber bounding the free ink volume is released by the sunken filling level. In this way, then this chamber can be vented through the storage element or the capillary volume. The disadvantage is that two different storage materials for the capillary volume are required, namely a first large-pore upper storage material which is first discharged, and a second lower-volume storage material near the ink outlet with smaller pores. Only by this constellation ventilation of the two chambers of the ink cartridge is reliably possible.
Es sei noch darauf hingewiesen, daß die beiden Kammern fluidverbunden sind, und zwar über einen bodennah angeordneten Durchgang in einer Zwischenwand, durch die die beiden Kammern innerhalb der Tintenpatrone voneinander getrennt sind.It should be noted that the two chambers are fluidly connected, via a near-ground passage in an intermediate wall, through which the two chambers are separated from each other within the ink cartridge.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Tintenpatrone zur Verfügung zu stellen, bei der man mit einem einzigen Speichermaterial zur Definition des Kapillarvolumens auskommt, d.h. mit einem Speichermaterial einheitlicher Porengröße. Des weiteren soll der Druckausgleich dadurch erleichtert sein, daß er nicht durch das Kapillarvolumen hindurch gesteuert werden muß.The present invention has for its object to provide an ink cartridge in which one manages with a single storage material for defining the capillary volume, i. with a storage material of uniform pore size. Furthermore, the pressure equalization should be facilitated by the fact that it does not have to be controlled by the capillary volume.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Maßnahmen des Anspruches 1 gelöst, wobei vorteilhafte Details und Aus führungs formen in den Unteransprüchen beschrieben sind.This object is achieved by the characterizing measures of claim 1, wherein advantageous details and imple mentation forms are described in the subclaims.
Erfindungsgemäß wird die Freitintenkammer belüftet, wobei zusätzlich eine gesonderte Belüftung des Kapillarvolumens bzw. der das Kapillarvolumen begrenzenden Kammer vorgesehen ist. Die Belüftung der das Freitintenvolumen begrenzenden Kammer erfolgt erfindungsgemäß durch ein von der Deckelwand der Patrone ausgehendes Tauchrohr, welches am eingetauchten distalen Ende eine oder mehrere sehr kleine, vorzugsweise schlitzförmige Offnungen aufweist. Durch die Größe dieser Offnungen läßt sich derAccording to the invention, the free-ink chamber is ventilated, wherein additionally a separate ventilation of the capillary volume or of the chamber delimiting the capillary volume is provided. The ventilation of the free ink volume limiting chamber is carried out according to the invention by an outgoing from the top wall of the cartridge immersion tube, which has one or more very small, preferably slot-shaped openings at the immersed distal end. Due to the size of these openings can be the
Entnahmezeitpunkt oder sogenannte „Bubble-Point" der das Freitintenvolumen begrenzenden Kammer steuern.Taking time or so-called "bubble point" of the free ink volume limiting chamber control.
Eine schlitzförmige Öffnung hat verglichen mit einer lochförmigen Öffnung weiterhin den Vorteil, daß sie gegenüber Schmutzpartikeln viel unempfindlicher und dementsprechend leistungsfähiger bezüglich der Luft-Durchflußmenge ist.A slot-shaped opening has the further advantage compared to a hole-shaped opening that it is much less sensitive to dirt particles and accordingly more efficient with respect to the air flow rate.
Durch den erfindungsgemäßen Blasenerzeuger in Form eines Tauchrohres wird sichergestellt, daß die Belüftung und demzufolge auch die Entleerung der beiden Kammern durch die Ausgestaltung des Blasenerzeugers und nicht durch das Kapillarvolumen bzw. das das Kapillarvolumen definierende Material gesteuert wird. Das Kapillarvolumen wird durch ein einheitliches Material mit konstanter Porengröße gebildet. Insofern zeichnet sich die erfindungsgemäße Lösung durch eine einfachere und dementsprechend kostengünstigere sowie hinsichtlich der Entleerung der Tintenpatrone besonders funktionssichere Konstruktion aus.By the bubble generator according to the invention in the form of a dip tube ensures that the ventilation and consequently the emptying of the two chambers is controlled by the design of the bubble generator and not by the capillary volume or the capillary volume defining material. The capillary volume is formed by a uniform material of constant pore size. In this respect, the solution according to the invention is characterized by a simpler and, accordingly, more cost-effective and, with regard to the emptying of the ink cartridge, a particularly functionally reliable construction.
Bezüglich der Dimensionierung des Blasenerzeugers wird insbesondere auf die Maßnahmen nach den Ansprüchen 4 bis 6 verwiesen.With regard to the dimensioning of the bubble generator, reference is made in particular to the measures according to claims 4 to 6.
Des weiteren sei darauf hingewiesen, daß es vorteilhaft ist, wenn das den Blasenerzeuger definierende Tauchrohr bis nahe zur Bodenwand der Tintenpatrone reicht, zumindest bis etwa zur Höhe der Fluidverbindung zwischen den beiden Kammern.It should also be noted that it is advantageous if the dip tube defining the bubble generator extends close to the bottom wall of the ink cartridge, at least to about the height of the fluid communication between the two chambers.
Bei getrennter Belüftung der beiden Kammern sei noch darauf hingewiesen, daß diese jeweils über die Deckelwand der Patrone erfolgt. Vorzugsweise sind die dort ausgebildeten Belüftungsöffnungen ineinander angeordnet, so daß eine innere Öffnung sowie eine diese ringförmig umgebende äußere Öffnung entsteht. Letztere steht über wenigstens einen in der Deckelwand ausgebildeten Luftkanal mit der das Kapillarvolumen begrenzenden Kammer in Verbindung, während die innere zentrale Öffnung über einen weiteren in der Deckelwand ausgebildeten Luftkanal mit dem Blasenerzeuger bzw. dem diesen definie- renden Tauchrohr in Verbindung steht.In separate ventilation of the two chambers should be noted that this is done in each case on the top wall of the cartridge. Preferably, the ventilation openings formed there are arranged one inside the other, so that an inner opening and an annular opening surrounding this outer opening is formed. The latter communicates with the chamber delimiting the capillary volume via at least one air channel formed in the cover wall, while the inner central opening communicates with the bubble generator or the dip tube defining it via a further air channel formed in the cover wall.
Nachstehend wird eine bevorzugte Ausführungsform einer erfindungsgemäß ausgebildeten Tintenpatrone anhand der beigefügten Zeichnung näher erläutert. Diese zeigt in:Hereinafter, a preferred embodiment of an ink cartridge according to the invention will be explained in more detail with reference to the accompanying drawings. This shows in:
Fig. 1 eine erfindungsgemäß ausgebildete Tintenpatrone in perspektivischerFig. 1 is an inventively designed ink cartridge in perspective
Ansicht von schräg oben, wobei zur Darstellung des erfindungsgemäßen Blasenerzeugers die vordere Seitenwand einen Ausschnitt enthält;View obliquely from above, wherein for illustrating the bubble generator according to the invention, the front side wall includes a cutout;
Fig. 2 eine Darstellung entsprechend Fig. 1, nur von schräg unten;Fig. 2 is a view corresponding to Figure 1, only obliquely from below.
Fig. 3 den Ausschnitt III in Fig. 2 in vergrößertem Maßstab;FIG. 3 the detail III in FIG. 2 on an enlarged scale; FIG.
Fig. 4 die Tintenpatrone gemäß Fig. 1 bzw. Fig. 2 vor Gebrauch in perspektivischer Darstellung; und4 shows the ink cartridge according to FIG. 1 or FIG. 2 before use in perspective view; FIG. and
Fig. 5 die Tintenpatrone gemäß Fig. 4 im Längsschnitt. Die in den Figuren 1, 2 bzw. 4, 5 dargestellte Tintenpatrone ist mit der Bezugsziffer 10 gekennzeichnet. Sie umfaßt vier Seitenwände, und zwar zwei gegenüberliegende Flachseitenwände 11 und zwei gegenüberliegende Stirnseitenwände 12, sowie eine Deckelwand 13 und Bodenwand 14. Innerhalb der Patrone 10 sind zwei Kammern ausgebildet, näm- lieh eine erste Kammer 17, welche ein sogenanntes Freitintenvolumen 16 begrenzt, und eine zweite Kammer 18, welche ein sogenanntes Kapillarvolumen 15 begrenzt. Dieses Kapillarvolumen 15 wird durch ein Tinten-Speicherelement in Form eines offenporigen Schwamms oder Fasermaterials definiert. Diesem Speicherelement bzw. dem Kapillarvolumen 15 ist bodenseitig ein Tintenauslaß 21 zugeordnet. Die beiden Kammern werden innerhalb der Patrone durch eine Trennwand 19 voneinander getrennt. Bodenseitig weist die Trennwand 19 einen Fluiddurchgang 20 zwischen den beiden Kammern 17 und 18 auf. Die Deckelwand 13 ist als gesondertes Bauteil ausgebildet und umfaßt zwei Belüftungsöffnungen 23, 24, die ineinander angeordnet sind. Eine innere Belüftungsöffnung 23 wird ringförmig von einer äußeren Belüftungsöffnung 24 umgeben. Die innere Belüf- tungsöffnung steht über einen in der Deckelwand 13 ausgebildeten Luftkanal 25 mit der ersten Kammer 17, die das Freitintenvolumen 16 begrenzt, in Fluidverbindung, während die äußere Belüftungsöffnung 24 über einen gesonderten, ebenfalls in der Deckelwand 13 ausgebildeten Luftkanal 26 mit der zweiten Kammer 18, die das Kapillarvolumen 15 begrenzt, in Verbindung steht. Dieser Kanal mündet über eine Öffnung 27 an der Unter- seite der Deckelwand 13 in die zweite Kammer 18.Fig. 5, the ink cartridge of FIG. 4 in longitudinal section. The ink cartridge shown in Figures 1, 2 and 4, 5 is designated by the reference numeral 10. It comprises four side walls, namely two opposite flat side walls 11 and two opposite end walls 12, and a top wall 13 and bottom wall 14. Within the cartridge 10, two chambers are formed, lent a first chamber 17, which limits a so-called free ink volume 16, and a second chamber 18 which defines a so-called capillary volume 15. This capillary volume 15 is defined by an ink storage element in the form of an open-pore sponge or fiber material. This memory element or the capillary volume 15 is associated with an ink outlet 21 on the bottom side. The two chambers are separated within the cartridge by a partition 19 from each other. On the bottom side, the partition 19 has a fluid passage 20 between the two chambers 17 and 18. The cover wall 13 is formed as a separate component and comprises two ventilation openings 23, 24, which are arranged one inside the other. An inner ventilation opening 23 is surrounded annularly by an outer ventilation opening 24. The inner ventilation opening is in fluid communication via an air duct 25 formed in the cover wall 13 with the first chamber 17 which bounds the free ink volume 16, while the outer ventilation opening 24 is connected to the second chamber via a separate air duct 26 likewise formed in the cover wall 13 Chamber 18, which limits the capillary volume 15, is in communication. This channel opens into the second chamber 18 via an opening 27 on the underside of the cover wall 13.
Auch der erste Luftkanal 25 mündet über eine Öffnung 28 an der Unterseite der Deckelwand 13 in die erste Kammer 17, und zwar nicht unmittelbar, sondern über ein als Blasenerzeuger ausgebildetes Tauchrohr 29. Dieses erstreckt sich also von der Unterseite der Deckelwand 13 nach unten in die das Freitintenvolumen 16 begrenzende erste Kammer 17 hinein. Am distalen Ende des Tauchrohres 29 ist wenigstens eine Öffnung 30 zur Einleitung von Luftbläschen in die Freitinte ausgebildet. Konkret umfaßt diese Öffnung bei der dargestellten Ausführungsform zwei relativ zur Rohrlängsachse diametral zueinander angeordnete Schlitzöffnungen, von denen in den Figuren 2 und 3 jeweils nur eine zu sehen ist. Die Größe dieser Schlitzöffnungen 30 am distalen Ende des Tauchrohres 29 ist jeweils so bemessen, daß beim Gebrauch der Tintenpatrone die Tinte erst, nachdem etwa 1 /4 des Kapillarvolumens verbraucht wurde, durch diese Öffnung 30 hindurch Luft unter Ausbildung feiner Bläschen in das Freitintenvolumen hinein ansaugt. Der so ausgebildete Blasenerzeuger definiert einen Kapillardruck, der vorzugsweise geringer ist als der Kapillardruck am Tintenauslaß 21, aber größer als der Kapillardruck im Kapillarvolumen 15. An dieser Stelle sei auch noch darauf hingewiesen, daß der Kapillardruck am Tintenauslaß durch einen innerhalb des Tintenauslasses angeordneten Docht aus Schaum oder faserigem Material definiert ist. Dieser Docht weist eine höhere Dichte und damit kleinere Porengröße auf als das Speichermaterial, welches das Kapillarvolumen 15 definiert.Also, the first air channel 25 opens through an opening 28 on the underside of the top wall 13 in the first chamber 17, not directly, but via a formed as a bubble generator dip tube 29. So this extends from the bottom of the top wall 13 down into the the free ink volume 16 limiting first chamber 17 into it. At the distal end of the dip tube 29 at least one opening 30 is formed for the introduction of air bubbles in the free ink. Specifically, this opening in the illustrated embodiment comprises two relative to the tube longitudinal axis diametrically opposed slot openings, of which in the figures 2 and 3 each only one can be seen. The size of these slit openings 30 at the distal end of the dip tube 29 is dimensioned such that when using the ink cartridge, the ink only after about 1/4 of the capillary volume has been consumed through this opening 30 through air sucking fine bubbles into the free ink volume into it , The bubble generator thus formed defines a capillary pressure which is preferably less than the capillary pressure at the ink outlet 21 but greater than the capillary pressure at the capillary volume 15. It should also be noted that capillary pressure at the ink outlet is provided by a wick disposed within the ink outlet Foam or fibrous material is defined. This wick has a higher density and thus smaller pore size than the storage material which defines the capillary volume 15.
Konkret werden die schlitzförmigen Öffnungen 30 am distalen Ende des Tauchrohres 29 so eingestellt, daß der Kapillardruck des Blasenerzeugers bis maximal etwa 150 %, insbesondere zwischen etwa 50 % und 150 % größer ist als der Kapillardruck bei gefülltem Kapillarvolumen 15.Specifically, the slot-shaped openings 30 are set at the distal end of the dip tube 29 so that the capillary pressure of the bubble generator to a maximum of about 150%, in particular between about 50% and 150% greater than the capillary pressure with filled capillary 15.
Den beiden Belüftungsöffnungen 23, 24 einerseits und dem Tintenauslaß 21 andererseits ist noch eine gemeinsame Remove-Folie 22 zugeordnet. Vor dem Gebrauch der Patrone 10 wird diese Remove-Folie abgezogen. Aufgrund der vorbeschriebenen Ausbildung der beiden Belüftungsöffnungen 23, 24 ist dabei stets sichergestellt, daß zuerst die das Kapillarvolumen begrenzende Kammer 18, und erst dann die das Freitintenvolumen begrenzende Kammer 17 belüftet werden. Auf diese Art und Weise wird verhindert, daß beim Druckausgleich unbeabsichtigt Tinte aus der mit der ersten Kammer 17 verbundenen Belüftungsöffnung 23 herausspritzt.The two ventilation openings 23, 24 on the one hand and the ink outlet 21 on the other hand is still a common remove film 22 assigned. Before using the cartridge 10, this remove film is peeled off. Due to the above-described design of the two ventilation openings 23, 24 is always ensured that first the capillary volume limiting chamber 18, and only then the free ink volume limiting chamber 17 are vented. In this way it is prevented that unintentionally squirts ink out of the associated with the first chamber 17 ventilation opening 23 during pressure compensation.
Die beiden vorgenannten Luftkanäle 25, 26 sind an der Oberseite der Deckelwand 13 ausgebildet, insbesondere eingefräst. Sie werden durch eine Deckfolie 31 verschlossen.The two aforementioned air channels 25, 26 are formed on the top of the top wall 13, in particular milled. They are closed by a cover sheet 31.
An der der Stirnseitenwand 12, über die sich die Remove-Folie 22 erstreckt, gegenüberliegenden Seitenwand sind noch Maßnahmen zur Fixierung der Tintenpatrone 10 innerhalb einer Aufnahme des Tintenstrahldruckers ausgebildet. Dabei handelt es sich um per se bekannte Maßnahmen, die hier nicht näher beschrieben werden müssen.Measures for fixing the ink cartridge 10 within a receptacle of the inkjet printer are also formed on the side wall opposite the end wall 12 over which the remove film 22 extends. These are per se known measures that need not be described in detail here.
Sämtliche in den Anmeldungsunterlagen offenbarten Merkmale werden als erfindungswesentlich beansprucht, soweit sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.All disclosed in the application documents features are claimed as essential to the invention, as far as they are new individually or in combination over the prior art.
B e z u g s z e i c h e n :S e c tio ns:
10 Tintenpatrone10 ink cartridge
11 Flachseitenwand11 flat side wall
12 Stirnseitenwand12 front wall
13 Deckelwand13 cover wall
14 Bodenwand14 bottom wall
15 Kapillarvolumen 16 Freitintenvolumen15 capillary volumes 16 free-ink volumes
17 erste Kammer17 first chamber
18 zweite Kammer18 second chamber
19 Trennwand19 partition
20 Fluiddurchgang20 fluid passage
21 Tintenauslaß21 ink outlet
22 Remove-Folie22 Remove slide
23 Belüftungsöffnung23 ventilation opening
24 Belüftungsöffnung24 ventilation opening
25 Luftkanal25 air duct
26 Luftkanal26 air duct
27 Öffnung27 opening
28 Öffnung28 opening
29 Tauchrohr29 dip tube
30 (Luftblasen-) Öffnung30 (bubble) opening
31 Deckfolie 31 cover sheet

Claims

„Tintenpatrone, insbesondere für Tintenstrahldrucker"Ansprüche "Ink cartridge, especially for inkjet printers" claims
1. Tintenpatrone, insbesondere für einen Tintenstrahldrucker, mit einem Tintenreservoir, welches in einer ersten Kammer (17) ein Freitintenvolumen (16) und in einer zweiten Kammer (18) ein Kapillarvolumen (15) begrenzt, wobei die beiden Kammern (17, 18) miteinander fluidverbunden sind, und wobei der das Kapillarvolumen (15) begrenzenden Kammer (18) ein Tintenauslaß (21) zugeordnet ist, gekennzeichnet durch einen Blasenerzeuger in Form eines in das Freitintenvolumen (16) eingetauchten, mit der äußeren Umgebung verbindbaren Tauchrohres (29), an dessen distalem Ende wenigstens eine Öffnung (30) zur Einleitung von Luftbläschen ausgebildet ist.An ink cartridge, in particular for an inkjet printer, having an ink reservoir which delimits a free ink volume (16) in a first chamber (17) and a capillary volume (15) in a second chamber (18), the two chambers (17, 18) wherein the chamber (18) delimiting the capillary volume (15) is associated with an ink outlet (21), characterized by a bubble generator in the form of a dip tube (29) immersed in the free ink volume (16) and connectable to the external environment; at least one opening (30) for introducing air bubbles is formed at its distal end.
2. Tintenpatrone nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnung (30) am distalen Ende des Tauchrohres (29) eine Schlitz Öffnung ist.2. The ink cartridge according to claim 1, characterized in that the opening (30) at the distal end of the dip tube (29) is a slot opening.
3. Tintenpatrone nach Anspruch 2, dadurch gekennzeichnet, daß am distalen Ende des Tauchrohres (29) wenigstens zwei, relativ zur Rohrlängsachse diametral zueinander angeordnete Schlitz Öffnungen (30) ausgebildet sind.3. The ink cartridge according to claim 2, characterized in that at least two, relative to the tube longitudinal axis diametrically opposed slot openings (30) are formed at the distal end of the dip tube (29).
4. Tintenpatrone nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Größe der wenigstens einen Öffnung (30) am distalen Ende des Tauchrohres (29) so bemessen ist, daß beim Gebrauch der Tintenpatrone (10) die Tinte erst, nachdem etwa 1/4 des Kapillarvolumens verbraucht worden ist, durch diese Öffnung (30) hindurch Luft unter Ausbildung feiner Bläschen in das Freitintenvolumen ansaugt.4. Ink cartridge according to one of claims 1 to 3, characterized in that the size of the at least one opening (30) at the distal end of the dip tube (29) is dimensioned such that when using the ink cartridge (10), the ink only, after about 1/4 of the capillary volume has been consumed, aspirate air through this opening (30), forming fine bubbles in the free ink volume.
5. Tintenpatrone nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der der Blasenerzeuger (Tauchrohr 29) einen Kapillardruck definiert, der geringer ist als der Kapillardruck am Tintenauslaß (21), aber größer als der Kapillardruck im5. Ink cartridge according to one of claims 1 to 4, characterized in that the bubble generator (dip tube 29) defines a capillary pressure which is less than the capillary pressure at the ink outlet (21), but greater than the capillary pressure in
Kapillarvolumen (15).Capillary volume (15).
6. Tintenpatrone nach Anspruch 5, dadurch gekennzeichnet, daß der Kapillardruck des Blasenerzeugers (Tauchrohr 29) bis maximal etwa 150 %, insbesondere zwischen etwa 50 % und 150 % größer ist als der Kapillardruck bei gefülltem Kapillarvolumen (15). 6. The ink cartridge according to claim 5, characterized in that the capillary pressure of the bubble generator (dip tube 29) to a maximum of about 150%, in particular between about 50% and 150% greater than the capillary pressure with a filled capillary volume (15).
EP08851980.6A 2007-11-19 2008-11-18 Ink cartridge, especially for an ink jet printer Not-in-force EP2214907B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007055162A DE102007055162A1 (en) 2007-11-19 2007-11-19 Ink cartridge, in particular for inkjet printers
PCT/EP2008/065725 WO2009065814A1 (en) 2007-11-19 2008-11-18 Ink cartridge, especially for an ink jet printer

Publications (2)

Publication Number Publication Date
EP2214907A1 true EP2214907A1 (en) 2010-08-11
EP2214907B1 EP2214907B1 (en) 2014-11-12

Family

ID=40419465

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Application Number Title Priority Date Filing Date
EP08851980.6A Not-in-force EP2214907B1 (en) 2007-11-19 2008-11-18 Ink cartridge, especially for an ink jet printer

Country Status (6)

Country Link
US (1) US20100253754A1 (en)
EP (1) EP2214907B1 (en)
JP (1) JP2011502835A (en)
CN (1) CN101868355A (en)
DE (1) DE102007055162A1 (en)
WO (1) WO2009065814A1 (en)

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US8915582B2 (en) 2012-01-12 2014-12-23 Seiko Epson Corporation Cartridge and printing material supply system
BR112013006402A2 (en) * 2012-01-12 2016-07-05 Seiko Epson Corp print cartridge and media supply system
EP3078497A1 (en) * 2015-04-09 2016-10-12 Pelikan Hardcopy Production AG Ink cartridge for use in an ink jet printer
JP6685697B2 (en) * 2015-10-30 2020-04-22 キヤノン株式会社 Ink tank and inkjet recording device
CN109733073B (en) * 2019-03-04 2023-12-01 珠海益捷科技有限公司 ink cartridge

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Publication number Priority date Publication date Assignee Title
US5509140A (en) * 1992-07-24 1996-04-16 Canon Kabushiki Kaisha Replaceable ink cartridge
TW373595U (en) * 1994-05-25 1999-11-01 Canon Kk An ink container and an ink jet recording apparatus using the same
CN1186196C (en) * 2001-08-24 2005-01-26 研能科技股份有限公司 Pressure balancing method and device for ink cartridge
JP3840237B2 (en) * 2004-06-02 2006-11-01 キヤノン株式会社 Liquid storage container and recording apparatus using the liquid storage container
CN2726881Y (en) * 2004-09-06 2005-09-21 聂瑞权 Ink-jet printer cartridge
JP4047328B2 (en) * 2004-12-24 2008-02-13 キヤノン株式会社 Liquid storage container, liquid supply system and recording apparatus using the container, and circuit board for the container
JP4735344B2 (en) * 2005-03-28 2011-07-27 セイコーエプソン株式会社 Liquid container
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Title
See references of WO2009065814A1 *

Also Published As

Publication number Publication date
US20100253754A1 (en) 2010-10-07
CN101868355A (en) 2010-10-20
EP2214907B1 (en) 2014-11-12
WO2009065814A1 (en) 2009-05-28
JP2011502835A (en) 2011-01-27
DE102007055162A1 (en) 2009-05-20

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