EP1134083B1 - Liquid cartridge and print head for an ink jet printer - Google Patents

Liquid cartridge and print head for an ink jet printer Download PDF

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Publication number
EP1134083B1
EP1134083B1 EP01114517A EP01114517A EP1134083B1 EP 1134083 B1 EP1134083 B1 EP 1134083B1 EP 01114517 A EP01114517 A EP 01114517A EP 01114517 A EP01114517 A EP 01114517A EP 1134083 B1 EP1134083 B1 EP 1134083B1
Authority
EP
European Patent Office
Prior art keywords
print head
sealing ring
liquid cartridge
opening
face
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
EP01114517A
Other languages
German (de)
French (fr)
Other versions
EP1134083A2 (en
EP1134083A3 (en
Inventor
Markus Bürgin
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
Priority claimed from DE19548032A external-priority patent/DE19548032C2/en
Application filed by Pelikan Hardcopy Production AG filed Critical Pelikan Hardcopy Production AG
Priority claimed from EP96810875A external-priority patent/EP0780234B1/en
Publication of EP1134083A2 publication Critical patent/EP1134083A2/en
Publication of EP1134083A3 publication Critical patent/EP1134083A3/en
Application granted granted Critical
Publication of EP1134083B1 publication Critical patent/EP1134083B1/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

  • the invention relates to a printhead according to the preamble of Claim 1.
  • EP-A-0'560'729 is an ink cartridge for a printhead of an ink jet printer known.
  • the cartridge has a housing. In one wall of the housing there is an opening around which Place the cartridge on a tubular extension of the printhead. There is a sealing ring on the tubular extension for sealing put on with a bead on its cylindrical The outer surface rests against the cylindrical wall of the opening.
  • the Cartridge has spherical caps on opposite side walls Projections, which are in holes in the side walls of the printhead engage.
  • EP-A-0 655 336 discloses a printhead with a elastomeric sealing element, which has a sealing rib. This Sealing element is arranged on a bottom of the printhead housing, so that a nozzle projects over the sealing element.
  • the present invention has for its object a Liquid cartridge and a printhead of the aforementioned Form in such a way that the production is simplified. This is done by a printhead solved with the features of claim 1.
  • FIG. 1 there is an ink cartridge shown with thick lines 1 inserted in one indicated with thin lines
  • Print head 2 of an ink jet printer shown.
  • the printhead 2 has a tubular nozzle 11, the end face with a Sieve 12 is complete.
  • the housing 13 of the print head 2 is in the illustration according to FIG. 2 open to the right and has a projection at the bottom right 14.
  • the interior 15 of the nozzle 11 communicates with a nozzle plate 16 and is inked filled.
  • On the nozzle 11 is an elastomeric sealing ring 17 with snapped onto a tubular extension 18.
  • a fine-pored fiber wick 20 used, the front end touches the screen 12.
  • the Sealing ring 17 has a flat end face surrounding the extension 19 21.
  • the opposite, parallel end face 22 lies on the end face of the nozzle 12.
  • the cartridge 1 has a housing 25 consisting of a bottom wall 26, four side walls 27, 28, 29 and a cover 30, welded on top wall.
  • the lower side wall 27 has a round opening 31, the diameter of which is larger than that Diameter of the neck 19.
  • a sealing bead 32 on the underside of the wall 27, which in the axial direction of the opening 31 and the nozzle 11 against the End face 21 of the sealing ring 17 is pressed.
  • the nozzle 11 and accordingly the sealing ring 17, the opening 31 and the sealing bead 32 can also be rectangular in plan view.
  • the wall 26 has a top running approximately parallel to the wall 27 Locking shoulder 33, which in a corresponding counter shoulder 34th of the housing 13 of the print head 2 is engaged.
  • the cartridge 1 When inserting the cartridge 1 snaps the lower edge of the lid 30 behind the Projection 14 a. The cartridge 1 is now pushed in until the locking shoulder 33 engages in the counter shoulder 34. In order to is a secure seal of the opening 31 against the nozzle 11 reached. Because the opening 31 is larger than the projection 19, on the one hand, the insertion by a pivoting movement enables, on the other hand, manufacturing tolerances can be bridged in the position of the nozzle 11.
  • the wick 20 touches an ink-soaked foam body when inserted 35 so that the wick 20 is soaked in ink.
  • the wick 20 also acts as a filter, so that the nozzles 16 do not pass through Particles from the foam body 35 are blocked or damaged.
  • a pump element 40 is cast in one piece in the cover 30.
  • the Pumporgan 40 has a bellows 41 formed from a number U-shaped folds 42 of small wall thickness with straight webs 43 and rectilinear, parallel legs 44.
  • the legs 44 have increasing length from fold 42 to fold 42. they are inclined at an acute angle to the surface of the cover 30. Your free ends go into the lid 30.
  • the cover sheet 45 of the bellows 41 has a larger wall thickness. It's below a film hinge 45 'with the lid 30 and laterally and above with the extreme fold 42 connected.
  • In the top middle has the cover page 45 a projection 46 with an air supply opening 47. After the insertion of the cartridge 1 into the print head 2 presses the operator on the projection 46. As a result, the opening 47 closed and the bellows 41 pressed in, so that the interior 48 of the bellows 41 is compressed. This will cause ink to enter the interior 15 of the nozzle 11 pressed.
  • a flap 49 is formed on the inside via a film hinge 50.
  • FIG. 2 shows this tab 49 as the lid 30 is injection molded.
  • Tab 49 pressed against the cover 30 by the foam body 33. This is the interior 48 of the bellows 41 except for narrow air gaps completed against the foam body 35.
  • the cartridge 1 described can be produced very efficiently.
  • the pump organ 40 can also be made very narrow. This means that even very narrow cartridges 1, e.g. for use can be produced in multicolor print heads 2. It can large tolerances in the position of the opening 31 and the nozzle 11 can be bridged. Because by engaging the locking shoulder 33 in the counter shoulder 34 the cartridge in the axial direction the opening 31 is positioned exactly, a safe Andokken the upper end face of the wick 20 to the foam body 35 reached.
  • the sealing ring 17 has the triple function of sealing, the suspension for snapping the shoulder 33, 34 and the compensation of tolerances regarding the position of the nozzle 11th
  • the liquid cartridge 1 described can be used except for printheads used by ink-jet printers for other applications e.g. for dosing devices for liquids, e.g. in the Medical sector.

Landscapes

  • Ink Jet (AREA)

Description

Die Erfindung betrifft einen Druckkopf gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a printhead according to the preamble of Claim 1.

Aus der EP-A-0'560'729 ist einen Tintenpatrone für einen Druckkopf eines Ink-Jet-Printers bekannt. Die Patrone hat ein Gehäuse. In der einen Gehäusewand ist eine Öffnung ausgespart, um die Patrone auf einen rohrförmigen Ansatz des Druckkopfs aufzustecken. Zum Abdichten ist auf den rohrförmigen Ansatz ein Dichtring aufgesetzt, der mit einem Wulst auf seiner zylindrischen Aussenfläche an der zylindrischen Wand der Öffnung anliegt. Die Patrone hat auf gegenüberliegenden Seitenwänden kugelkalottenartige Vorsprünge, welche in Bohrungen in Seitenwänden das Druckkopfs einrasten.From EP-A-0'560'729 is an ink cartridge for a printhead of an ink jet printer known. The cartridge has a housing. In one wall of the housing there is an opening around which Place the cartridge on a tubular extension of the printhead. There is a sealing ring on the tubular extension for sealing put on with a bead on its cylindrical The outer surface rests against the cylindrical wall of the opening. The Cartridge has spherical caps on opposite side walls Projections, which are in holes in the side walls of the printhead engage.

Ferner offenbart EP-A- 0 655 336 einen Druckkopf mit einem elastomeren Dichtelement, welches eine Dichtrippe aufweist. Dieses Dichtelement ist auf einem Boden des Druckkopfgehäuses angeordnet, so dass ein Stutzen das Dichtelement überragt.Furthermore, EP-A-0 655 336 discloses a printhead with a elastomeric sealing element, which has a sealing rib. This Sealing element is arranged on a bottom of the printhead housing, so that a nozzle projects over the sealing element.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Flüssigkeitspatrone und einen Druckkopf der eingangs genannten Art derart auszubilden, dass die Herstellung vereinfacht wird. Diese Aufgabe wird durch einen Druckkopf mit den Merkmalen gemäss Anspruch 1 gelöst.The present invention has for its object a Liquid cartridge and a printhead of the aforementioned Form in such a way that the production is simplified. This is done by a printhead solved with the features of claim 1.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Darin zeigt:

Figur 1
Eine Frontansicht,
Figur 2
Einen Querschnitt längs der Linie II-II in Figur 1, und
Figur 3
einen vergrösserten Ausschnitt der Darstellung nach Figur 2.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
Figure 1
A front view
Figure 2
A cross section along the line II-II in Figure 1, and
Figure 3
an enlarged section of the representation of Figure 2.

In den Figuren ist eine mit dicken Linien dargestellte Tintenpatrone 1 eingesetzt in einen mit dünnen Linien angedeuteten Druckkopf 2 eines Ink-Jet-Printers dargestellt. Der Druckkopf 2 hat einen rohrförmigen Stutzen 11, dessen Stirnfläche mit einem Sieb 12 abgeschlossen ist. Das Gehäuse 13 des Druckkopfs 2 ist in der Darstellung nach Figur 2 nach der rechten Seite offen und hat unten rechts einen Vorsprung 14. Der Innenraum 15 des Stutzens 11 kommuniziert mit einer Düsenplatte 16 und ist mit Tinte gefüllt. Auf dem Stutzen 11 ist ein elastomerer Dichtring 17 mit einem rohrförmigen Ansatz 18 aufgeschnappt. In einem gegenüberliegenden hülsenförmigen Ansatz 19 ist ein feinporiger Faserdocht 20 eingesetzt, dessen Stirnende das Sieb 12 berührt. Der Dichtring 17 hat eine den Ansatz 19 umgebende ebene Stirnfläche 21. Die gegenüberliegende, parallele Stirnfläche 22 liegt auf der Stirnfläche des Stutzens 12 an.In the figures there is an ink cartridge shown with thick lines 1 inserted in one indicated with thin lines Print head 2 of an ink jet printer shown. The printhead 2 has a tubular nozzle 11, the end face with a Sieve 12 is complete. The housing 13 of the print head 2 is in the illustration according to FIG. 2 open to the right and has a projection at the bottom right 14. The interior 15 of the nozzle 11 communicates with a nozzle plate 16 and is inked filled. On the nozzle 11 is an elastomeric sealing ring 17 with snapped onto a tubular extension 18. In an opposite sleeve-shaped extension 19 is a fine-pored fiber wick 20 used, the front end touches the screen 12. The Sealing ring 17 has a flat end face surrounding the extension 19 21. The opposite, parallel end face 22 lies on the end face of the nozzle 12.

Die Patrone 1 hat ein Gehäuse 25 bestehend aus einer Bodenwand 26, vier Seitenwänden 27, 28, 29 und einer als Deckel 30 ausgebildeten, aufgeschweissten Deckwand. Die untere Seitenwand 27 hat eine runde Öffnung 31, deren Durchmesser grösser ist als der Durchmesser des Ansatzes 19. Um die Öffnung 31 herum erstreckt sich auf der Unterseite der Wand 27 ein Dichtwulst 32, welcher in Achsrichtung der Öffnung 31 und des Stutzens 11 gegen die Stirnfläche 21 des Dichtrings 17 gepresst ist. Der Stutzen 11 und dementsprechend auch der Dichtring 17, die Öffnung 31 und der Dichtwulst 32 können in der Draufsicht auch rechteckig sein. Die Wand 26 hat oben eine etwa parallel zur Wand 27 verlaufende Rastschulter 33, welche in eine entsprechende Gegenschulter 34 des Gehäuses 13 des Druckkopfs 2 eingerastet ist. Beim Einsetzen der Patrone 1 rastet die untere Kante des Deckels 30 hinter dem Vorsprung 14 ein. Die Patrone 1 wird nun oben eingedrückt, bis die Rastschulter 33 in der Gegenschulter 34 einrastet. Damit wird eine sichere Abdichtung der Öffnung 31 gegenüber dem Stutzen 11 erreicht. Weil die Öffnung 31 grösser ist als der Vorsprung 19, wird einerseits das Einsetzen durch eine Schwenkbewegung ermöglicht, andererseits können damit Herstellungstoleranzen in der Position des Stutzens 11 überbrückt werden. Der Docht 20 berührt beim Einsetzen einen mit Tinte getränkten Schaumkörper 35, so dass der Docht 20 mit Tinte getränkt wird. Der Docht 20 wirkt zugleich als Filter, so dass die Düsen 16 nicht durch Partikel aus dem Schaumkörper 35 verstopft oder beschädigt werden.The cartridge 1 has a housing 25 consisting of a bottom wall 26, four side walls 27, 28, 29 and a cover 30, welded on top wall. The lower side wall 27 has a round opening 31, the diameter of which is larger than that Diameter of the neck 19. Extends around the opening 31 a sealing bead 32 on the underside of the wall 27, which in the axial direction of the opening 31 and the nozzle 11 against the End face 21 of the sealing ring 17 is pressed. The nozzle 11 and accordingly the sealing ring 17, the opening 31 and the sealing bead 32 can also be rectangular in plan view. The wall 26 has a top running approximately parallel to the wall 27 Locking shoulder 33, which in a corresponding counter shoulder 34th of the housing 13 of the print head 2 is engaged. When inserting the cartridge 1 snaps the lower edge of the lid 30 behind the Projection 14 a. The cartridge 1 is now pushed in until the locking shoulder 33 engages in the counter shoulder 34. In order to is a secure seal of the opening 31 against the nozzle 11 reached. Because the opening 31 is larger than the projection 19, on the one hand, the insertion by a pivoting movement enables, on the other hand, manufacturing tolerances can be bridged in the position of the nozzle 11. The wick 20 touches an ink-soaked foam body when inserted 35 so that the wick 20 is soaked in ink. The wick 20 also acts as a filter, so that the nozzles 16 do not pass through Particles from the foam body 35 are blocked or damaged.

Im Deckel 30 ist ein Pumporgan 40 einstückig angegossen. Das Pumporgan 40 hat einen Faltenbalg 41 gebildet aus einer Anzahl U-förmiger Falten 42 geringer Wandstärke mit geradlinigen Stegen 43 und geradlinigen, parallelen Schenkeln 44. Die Schenkel 44 haben von Falte 42 zu Falte 42 ansteigende Länge. Sie sind spitzwinklig zur Fläche des Deckels 30 geneigt. Ihre freien Enden gehen in den Deckel 30 über. Das Deckblatt 45 des Faltenbalges 41 hat eine grössere Wandstärke. Es ist unten über ein Filmscharnier 45' mit dem Deckel 30 und seitlich und oben mit der äussersten Falte 42 verbunden. Oben in der Mitte hat das Deckblatt 45 einen Vorsprung 46 mit einer Luftzufuhröffnung 47. Nach dem Einsetzen der Patrone 1 in den Druckkopf 2 drückt die Bedienungsperson auf den Vorsprung 46. Dadurch wird die Öffnung 47 verschlossen und der Balg 41 eingedrückt, so dass der Innenraum 48 des Balges 41 komprimiert wird. Dadurch wird Tinte in den Innenraum 15 des Stutzens 11 gepresst.A pump element 40 is cast in one piece in the cover 30. The Pumporgan 40 has a bellows 41 formed from a number U-shaped folds 42 of small wall thickness with straight webs 43 and rectilinear, parallel legs 44. The legs 44 have increasing length from fold 42 to fold 42. they are inclined at an acute angle to the surface of the cover 30. Your free ends go into the lid 30. The cover sheet 45 of the bellows 41 has a larger wall thickness. It's below a film hinge 45 'with the lid 30 and laterally and above with the extreme fold 42 connected. In the top middle has the cover page 45 a projection 46 with an air supply opening 47. After the insertion of the cartridge 1 into the print head 2 presses the operator on the projection 46. As a result, the opening 47 closed and the bellows 41 pressed in, so that the interior 48 of the bellows 41 is compressed. This will cause ink to enter the interior 15 of the nozzle 11 pressed.

Um zu verhindern, dass während des Transportes Tinte in den Innenraum 48 des Balges 41 gelangen kann, ist am Deckel 30 auf der Innenseite ein Lappen 49 über ein Filmscharnier 50 angeformt. In Figur 2 ist dieser Lappen 49 so dargestellt, wie der Deckel 30 spitzgegossen wird. Bei der Montage des Deckels 30 wird dieser Lappen 49 durch den Schaumkörper 33 an den Deckel 30 angedrückt. Damit ist der Innenraum 48 des Balges 41 bis auf enge Luftspalte gegen den Schaumkörper 35 abgeschlossen.To prevent ink from entering the interior during transportation 48 of the bellows 41 can reach the cover 30 on the A flap 49 is formed on the inside via a film hinge 50. In FIG. 2 shows this tab 49 as the lid 30 is injection molded. When installing the cover 30, this is Tab 49 pressed against the cover 30 by the foam body 33. This is the interior 48 of the bellows 41 except for narrow air gaps completed against the foam body 35.

Die beschriebene Patrone 1 kann sehr rationell hergestellt werden. Das Pumporgan 40 kann auch sehr schmal ausgebildet werden. Dadurch können auch sehr schmale Patronen 1, z.B. für den Einsatz in Mehrfarben-Druckköpfen 2 hergestellt werden. Es können grosse Toleranzen in der Position der Öffnung 31 und des Stutzens 11 überbrückt werden. Weil durch das Einrasten der Rastschulter 33 in der Gegenschulter 34 die Patrone in Achsrichtung der Öffnung 31 exakt positioniert ist, wird ein sicheres Andokken der oberen Stirnfläche des Dochtes 20 an den Schaumkörper 35 erreicht. Der Dichtring 17 hat die dreifache Funktion der Abdichtung, der Federung für das Einrasten der Schulter 33, 34 und des Ausgleichs von Toleranzen bezüglich der Lage des Stutzens 11.The cartridge 1 described can be produced very efficiently. The pump organ 40 can also be made very narrow. This means that even very narrow cartridges 1, e.g. for use can be produced in multicolor print heads 2. It can large tolerances in the position of the opening 31 and the nozzle 11 can be bridged. Because by engaging the locking shoulder 33 in the counter shoulder 34 the cartridge in the axial direction the opening 31 is positioned exactly, a safe Andokken the upper end face of the wick 20 to the foam body 35 reached. The sealing ring 17 has the triple function of sealing, the suspension for snapping the shoulder 33, 34 and the compensation of tolerances regarding the position of the nozzle 11th

Die beschriebene Flüssigkeitspatrone 1 kann ausser für Druckköpfe von Ink-Jet-Printern auch noch für andere Anwendungen eingesetzt werden, z.B. für Dosiergeräte für Flüssigkeiten, z.B. im Medizinalbereich.The liquid cartridge 1 described can be used except for printheads used by ink-jet printers for other applications e.g. for dosing devices for liquids, e.g. in the Medical sector.

Claims (4)

  1. Print head for an ink jet printer for employing a liquid cartridge (1), the print head (2) having a connecting piece (11) and an elastomeric sealing ring (17), the sealing ring (17) having an end face (21) which is sealed off by a sealing bead (32) which surrounds an opening (31) of the liquid cartridge (1), and the print head (2) having a mating shoulder (34) which extends approximately parallel to the end face (21) of the sealing ring (17) for latching in a latching shoulder (33) of the liquid cartridge, characterized in that the connecting piece (11) is terminated by a screen (12), and in that the sealing ring (17) is supported on an end face of the connecting piece (11).
  2. Print head according to Claim 1, it being possible to press the end face (21) of the sealing ring (13), on account of the latching, against the sealing bead (32) in the axial direction of the opening (31) and of the connecting piece (11).
  3. Print head according to Claim 1, the sealing ring (17) having a sleeve-shaped projection (19) into which a fibre wick (20) is inserted which touches the screen (12) directly or indirectly and whose fibres extend approximately perpendicularly to the screen.
  4. Print head according to Claim 2, the projection (19) having a smaller outer diameter than the opening (31) of the liquid cartridge (1), which opening (31) is provided for placing onto a drop producer (2).
EP01114517A 1995-12-21 1996-12-17 Liquid cartridge and print head for an ink jet printer Expired - Lifetime EP1134083B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19548032 1995-12-21
DE19548032A DE19548032C2 (en) 1995-12-21 1995-12-21 Liquid cartridge for an ink jet printer
EP96810875A EP0780234B1 (en) 1995-12-21 1996-12-17 Ink cartridge and printhead for an inkjet printer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP96810875A Division EP0780234B1 (en) 1995-12-21 1996-12-17 Ink cartridge and printhead for an inkjet printer

Publications (3)

Publication Number Publication Date
EP1134083A2 EP1134083A2 (en) 2001-09-19
EP1134083A3 EP1134083A3 (en) 2002-01-23
EP1134083B1 true EP1134083B1 (en) 2004-04-07

Family

ID=26021542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01114517A Expired - Lifetime EP1134083B1 (en) 1995-12-21 1996-12-17 Liquid cartridge and print head for an ink jet printer

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EP (1) EP1134083B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE138015T1 (en) 1992-03-10 1996-06-15 Pelikan Produktions Ag INK CARTRIDGE FOR A PRINT HEAD OF AN INK-JET PRINTER
JPH05338191A (en) * 1992-06-11 1993-12-21 Fuji Xerox Co Ltd Ink jet cartridge
JP3201053B2 (en) * 1993-02-13 2001-08-20 富士ゼロックス株式会社 Inkjet cartridge
US5619239A (en) * 1993-11-29 1997-04-08 Canon Kabushiki Kaisha Replaceable ink tank
JPH08323990A (en) * 1995-06-02 1996-12-10 Brother Ind Ltd Ink supply connection member

Also Published As

Publication number Publication date
EP1134083A2 (en) 2001-09-19
EP1134083A3 (en) 2002-01-23

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