EP2237965B1 - Mehrere leitungen aufweisende strömungskupplung mit leckflusssteuerung - Google Patents

Mehrere leitungen aufweisende strömungskupplung mit leckflusssteuerung Download PDF

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Publication number
EP2237965B1
EP2237965B1 EP08700340A EP08700340A EP2237965B1 EP 2237965 B1 EP2237965 B1 EP 2237965B1 EP 08700340 A EP08700340 A EP 08700340A EP 08700340 A EP08700340 A EP 08700340A EP 2237965 B1 EP2237965 B1 EP 2237965B1
Authority
EP
European Patent Office
Prior art keywords
printhead
printhead cartridge
spouts
interface plate
fluid coupling
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.)
Active
Application number
EP08700340A
Other languages
English (en)
French (fr)
Other versions
EP2237965A1 (de
EP2237965A4 (de
Inventor
Norman Micheal Berry
Geoffrey Philip Dyer
Michael John Hudson
Akira Nakazawa
Garry Raymond Jackson
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.)
Zamtec Ltd
Original Assignee
Silverbrook Research Pty Ltd
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Publication date
Application filed by Silverbrook Research Pty Ltd filed Critical Silverbrook Research Pty Ltd
Publication of EP2237965A1 publication Critical patent/EP2237965A1/de
Publication of EP2237965A4 publication Critical patent/EP2237965A4/de
Application granted granted Critical
Publication of EP2237965B1 publication Critical patent/EP2237965B1/de
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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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • 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

Definitions

  • the present invention relates to the field of fluid couplings and in particular, fluid couplings for supplying ink to inkjet printheads.
  • Pagewidth printheads increase print speeds as the printhead does not traverse back and forth across the page to deposit a line of an image.
  • the pagewidth printhead simply deposits the ink on the media as it moves past at high speeds.
  • Such printheads have made it possible to perform full colour 1600dpi printing at speeds in the vicinity of 60 pages per minute; speeds previously unattainable with conventional inkjet printers.
  • Some of the Applicant's printers provide the printhead as a user removable cartridge. This recognizes that individual ink ejection nozzles may fail over time and eventually there are enough dead nozzles to cause artifacts in the printed image. Allowing the user to replace the printhead maintains the print quality without requiring the entire printer to be replaced. It also permits the user to substitute a different printhead for different print jobs.
  • a draft quality printhead can be installed for some low resolution documents printed at high speed, and subsequently removed and replaced with the original high resolution printhead.
  • a number of the Applicant's printhead cartridges do not have an inbuilt ink supply for the printhead. These printhead cartridges need to be fluidically coupled to the ink supply upon installation. The supply flowrate to the pagewidth printhead is too high for needle valves because of the narrow internal diameter. This requires the coupling conduits to be relatively large and while the complementary structures on each side of the coupling may be self sealing upon disengagement, the wet surfaces can have enough residual ink to drip or run over the exterior surface of the coupling.
  • conduits should be spaced from each other and positioned such that one conduit is never likely to be vertically above another during installation or removal. However, spacing the conduits apart is counter to compact design and structurally there is less flex in the components during engagement and disengagement if the conduits are clustered around a central axis.
  • US 2006/0238570 A1 discloses a pagewidth printhead assembly with ink distribution arrangement.
  • the present invention provides a user replaceable printhead cartridge as defined in claim 1.
  • the invention recognizes that subtle surface modifications can be used to define a fluid flow path that residual drops will follow with good reliability. This permits the spouts to be clustered together with little chance of any cross contamination between the colors.
  • the surface formations are grooves in the interface plate.
  • the grooves extend in a generally vertical direction when the printhead cartridge is oriented as it would be when installed, the grooves deviating from generally vertical to avoid one of the spouts of different color.
  • each grooves begin at its respective spouts and end at the recess feature.
  • the printhead is a pagewidth printhead:
  • the printer is an A4 printer and the printhead can print at speeds greater than 40 pages per minute.
  • each of the apertures in the socket has a shut off valve that is biased closed, the shut off valve being held open when engaged with the corresponding spout.
  • Figure 1 shows a printhead cartridge 2 installed in a print engine 3.
  • the print engine 3 is the mechanical heart of a printer which can have many different external casing shapes, ink tank locations and capacities, as well as media feed and collection trays.
  • the printhead cartridge 2 is inserted and removed by the user lifting and lowering the latch 126.
  • Figure 2 shows the print engine 3 with the printhead cartridge removed reveal the apertures 122 in each of the sockets 120.
  • Each aperture 122 receives one of the spouts 52 on the inlet and outlet manifolds.
  • the ink tanks have an arbitrary position and configuration but simply connect to hollow spigots 124 at the rear of the sockets 120.
  • FIG 3 is a perspective of the complete printhead cartridge 2.
  • the printhead cartridge 2 has a top molding 44 and a removable protective cover 42.
  • the top molding 44 has a central web for structural stiffness and to provide grip textured surfaces 58 for manipulating the cartridge during insertion and removal.
  • the base portion of the protective cover 42 protects the printhead ICs (not shown) and line of contacts (not shown) prior to installation in the printer.
  • Caps 56 are integrally formed with the base portion and cover the ink inlets and outlets (see 54 and 52 of Fig. 5 ).
  • Figure 4 shows the printhead assembly 2 with its protective cover 42 removed to expose the printhead ICs on the bottom surface and the line of contacts 33 on the side surface.
  • the protective cover is discarded to the recycling waste or fitted to the printhead cartridge being replaced to contain leakage from residual ink.
  • Figure 5 is a partially exploded perspective of the printhead assembly 2.
  • the top cover 44 has been removed reveal the inlet manifold 48 and the outlet manifold 50.
  • the inlet and outlet shrouds 46 and 47 have been removed to better expose the five inlet and outlet spouts 52.
  • the inlet and outlet manifolds 48 and 50 form a fluid connection between each of the individual inlets and outlets and the corresponding main channel in the LCP molding.
  • the main channel extends the length of the LCP molding and it feeds a series of fine channels on the underside of the LCP molding.
  • a line of air cavities are formed above each of the main channels 24. Any shock waves or pressure pulses in the ink are damped by compressing the air the air cavities.
  • Figure 6 is an exploded perspective of the printhead assembly without the inlet or outlet manifolds or the top cover molding.
  • the main channels 24 for each ink color and their associated air cavities 26 are formed in the channel molding 68 and the cavity molding 72.
  • Adhered to the bottom of the channel molding 68 is a die attach film 66.
  • the die attach film 66 mounts the printhead ICs 31 to the channel molding such that the fine channels on the underside of the are in fluid communication with the printhead ICs 31 via small laser ablated holes through the film.
  • Figure 7 shows the inlet and outlet manifolds, 48 and 50, in elevation. Both manifolds have an interface plate 76 from which the spouts 52 extend.
  • the spouts 52 have a relatively large internal diameter (approx. 2mm) compared to, say, a needle valve. This accommodates the high ink flow rate used by a pagewidth printhead, printing A4 sheets at speeds greater than 40 ppm (typically 60ppm) at a resolution of 1600dpi.
  • the inlet and outlet manifolds 48 and 50 form a fluid connection between spouts 52 and the LCP moldings 20 via the connectors 60.
  • the spouts in each manifold are arranged in a circle. Keeping the spouts 52 clustered close together on the inlet and outlet manifolds is less structurally stressful on the plastic moldings of the printhead cartridge.
  • a single force applied at the centre of the spouts 52 can engage the socket instead of distributed forces acting across widely spaced spouts, or a single force that needs to be distributed by a structure stiffened to resist bending.
  • the print engine 3 has three structurally stiff reference datums 128.
  • the inlet and outlet manifolds bear directly onto the outer reference datums (see Fig. 1 ) so that their reaction force is directed though the centre of the five spouts 52.
  • the centre datum 128 provides a reaction force directly opposing the force of the latch 126 holding the printhead cartridge in place.
  • Disengaging the printhead cartridge 2 from the apertures 122 in the sockets 120 can cause residual ink to dribble from the spouts 52.
  • the spouts on each manifold are clustered together.
  • Grooves 110 are formed in the interface plates 76 to control the flow direction of any residual ink as it runs from a spout under gravity. Without any flow control measures, there is a good chance that the residual ink from one spout would flow onto the spout of a different color. The resulting color mixing is reasonably rapid and pervasive throughout the printhead cartridge 2. If the cartridge is subsequently re-installed in the print engine, the color mixing changes the color balance and is detrimental to image quality.
  • the grooves 110 define a flow path that is generally vertically downwards to be consistent with the gravity feed of the residual drops.
  • the grooves 110 deviate from the vertical in order to avoid other spouts.
  • the grooves 110 terminate in a recess 112 beneath the circle of spouts 52. Residual ink collects in the recess 112 so as to avoid inadvertent spillage and ink stains.
  • the grooves 110 can be small relative to the size of the residual ink drops draining from the spout 52. Rather than contain the flow, the grooves can merely define a preferred flow path that the drop chooses in preference to all others. For this, the grooves need only be enough to draw and guide the drop by capillary action. The ordinary worker will appreciate that the preferential flow path may also be defined by a ridge, or a series of discrete formations spaced along the interface plate.

Claims (6)

  1. Vom Benutzer austauschbare Druckkopfpatrone (2) zum Einsetzen in ein Druckergehäuse mit einem Tintenvorrat, wobei die Druckkopfpatrone einen Druckkopf und eine Flüssigkeitsverbindung für den Tintenstrahldruckkopf umfasst, wobei die Flüssigkeitsverbindung Folgendes umfasst:
    eine Schnittstellenplatte, die auf einer Außenseite der Druckkopfpatrone positioniert ist, wobei die Schnittstellenplatte mehrere Auslaufstutzen (52) zum abgedichteten Eingriff mit entsprechenden Öffnungen (122) in einer komplementären Fassung (120) des Druckergehäuses,
    dadurch gekennzeichnet, dass
    die mehreren Auslaufstutzen in einer kreisförmigen Struktur angeordnet sind und
    die Schnittstellenplatte Oberflächenstrukturen (110) aufweist, die einzeln jeweils mit jedem der Auslaufstutzen verbunden sind, wobei jede Oberflächenstruktur einen Strömungsweg entlang der Schnittstellenplatte zu einem gemeinsamen Aussparungsmerkmal (112) definiert, wobei jeder Strömungsweg dazu konfiguriert ist, einen beliebigen der anderen Auslaufstutzen zu meiden.
  2. Druckkopfpatrone nach Anspruch 1, wobei die Oberflächenstrukturen Rillen in der Schnittstellenplatte sind.
  3. Druckkopfpatrone nach Anspruch 1 oder 2, wobei jede Rille an ihrem jeweiligen Auslaufstutzen beginnt und am Aussparungsmerkmal endet.
  4. Druckkopfpatrone nach einem der vorhergehenden Ansprüche, wobei der Druckkopf ein Seitenbreiten-Druckkopf ist.
  5. Druckkopfpatrone nach einem der vorhergehenden Ansprüche, wobei die Druckkopfpatrone einen Einlassverteiler (48) und einen Auslassverteiler (50) aufweist und wobei sowohl der Einlassverteiler als auch der Auslassverteiler die Flüssigkeitsverbindung aufweisen.
  6. Drucker, der Folgendes umfasst:
    ein Druckergehäuse (3) mit einem Tintenvorrat und
    eine vom Benutzer austauschbare Druckkopfpatrone (2) nach einem der vorhergehenden Ansprüche, die in das Druckergehäuse eingesetzt ist,
    wobei die Auslaufstutzen der Druckkopfpatrone in abgedichtetem Eingriff mit den entsprechenden Öffnungen in den komplementären Fassungen des Druckergehäuses stehen.
EP08700340A 2008-01-16 2008-01-16 Mehrere leitungen aufweisende strömungskupplung mit leckflusssteuerung Active EP2237965B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2008/000042 WO2009089564A1 (en) 2008-01-16 2008-01-16 Multiple conduit fluid coupling with leakage flow control

Publications (3)

Publication Number Publication Date
EP2237965A1 EP2237965A1 (de) 2010-10-13
EP2237965A4 EP2237965A4 (de) 2011-02-23
EP2237965B1 true EP2237965B1 (de) 2012-09-26

Family

ID=40884979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08700340A Active EP2237965B1 (de) 2008-01-16 2008-01-16 Mehrere leitungen aufweisende strömungskupplung mit leckflusssteuerung

Country Status (3)

Country Link
EP (1) EP2237965B1 (de)
TW (1) TWI461308B (de)
WO (1) WO2009089564A1 (de)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591875A (en) * 1985-04-12 1986-05-27 Eastman Kodak Company Ink cartridge and cooperative continuous ink jet printing apparatus
US5852459A (en) * 1994-10-31 1998-12-22 Hewlett-Packard Company Printer using print cartridge with internal pressure regulator
US5997128A (en) * 1997-05-30 1999-12-07 Hewlett-Packard Company Translational service station for imaging inkjet printheads
US6041805A (en) * 1998-07-07 2000-03-28 Imation Corp. Valve assembly for a removable ink cartridge
US6652078B2 (en) * 2000-05-23 2003-11-25 Silverbrook Research Pty Ltd Ink supply arrangement for a printer
US6651955B2 (en) * 2001-07-30 2003-11-25 Hewlett-Packard Development Company, L.P. Elastomeric valve, and methods
US6648458B2 (en) * 2002-04-23 2003-11-18 Hewlett-Packard Development Company, L.P. Pinch seal providing fluid interconnects between fluid delivery system components
JP2004174961A (ja) * 2002-11-28 2004-06-24 Brother Ind Ltd インクジェット記録装置、および、インクジェット記録装置のインク導入方法
JP4003728B2 (ja) * 2003-09-29 2007-11-07 ブラザー工業株式会社 チューブ固定部材及びチューブ固定構造
US7448734B2 (en) * 2004-01-21 2008-11-11 Silverbrook Research Pty Ltd Inkjet printer cartridge with pagewidth printhead
US7118189B2 (en) * 2004-05-28 2006-10-10 Videojet Technologies Inc. Autopurge printing system
JP2006198984A (ja) * 2005-01-24 2006-08-03 Canon Finetech Inc 回復機構及び回復ユニット並びに画像形成装置
JP4744243B2 (ja) * 2005-08-31 2011-08-10 富士フイルム株式会社 インクタンク、インクジェット記録装置並びにインク充填方法及び装置
US7837297B2 (en) * 2006-03-03 2010-11-23 Silverbrook Research Pty Ltd Printhead with non-priming cavities for pulse damping

Also Published As

Publication number Publication date
EP2237965A1 (de) 2010-10-13
EP2237965A4 (de) 2011-02-23
TWI461308B (zh) 2014-11-21
TW200932555A (en) 2009-08-01
WO2009089564A1 (en) 2009-07-23

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