EP0854042A2 - Dispositif d'alimentation en encre pour tête d'impression par jet d'encre - Google Patents

Dispositif d'alimentation en encre pour tête d'impression par jet d'encre Download PDF

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Publication number
EP0854042A2
EP0854042A2 EP97250343A EP97250343A EP0854042A2 EP 0854042 A2 EP0854042 A2 EP 0854042A2 EP 97250343 A EP97250343 A EP 97250343A EP 97250343 A EP97250343 A EP 97250343A EP 0854042 A2 EP0854042 A2 EP 0854042A2
Authority
EP
European Patent Office
Prior art keywords
ink
module
connection piece
flange part
hand
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
EP97250343A
Other languages
German (de)
English (en)
Other versions
EP0854042B1 (fr
EP0854042A3 (fr
Inventor
Wolfgang Muhl
Michael Dr. Seikel
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.)
Francotyp Postalia GmbH
Original Assignee
Francotyp Postalia GmbH
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 Francotyp Postalia GmbH filed Critical Francotyp Postalia GmbH
Publication of EP0854042A2 publication Critical patent/EP0854042A2/fr
Publication of EP0854042A3 publication Critical patent/EP0854042A3/fr
Application granted granted Critical
Publication of EP0854042B1 publication Critical patent/EP0854042B1/fr
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
    • B41J2/1752—Mounting within the printer
    • B41J2/17523—Ink connection

Definitions

  • the invention relates to an arrangement for supplying ink to an ink print head, in particular an ink print head, which is composed of several modules in a stacked construction.
  • ink printheads are used both in office printers and in small, fast printers - as are required for franking machines and product labeling devices - and generally have a larger number of nozzles. In the latter case in particular, a high level of reliability is required so that errors in printing are avoided which can trigger high follow-up costs.
  • One component that has a particularly large influence on the reliability of a printer is the ink print head and its supply.
  • An ink printhead which is composed of a number of modules, see US Pat. No. 4,703,333.
  • Each module has a number of nozzles and consists of a plurality of plates arranged one above the other with integrated ink pressure chambers and ink supply channels.
  • the module is built according to the sideshooter principle, which means that the nozzle channels or nozzle openings are led across an outer plate.
  • the pressure wave in the ink pressure chamber runs in the direction of the nozzle channel, so that the ink droplets are ejected orthogonally to the plate.
  • ink inlet channels and openings are provided for the ink supply across the outer plate of the opposite side of the module.
  • an inlet nozzle is placed on the plate above each ink inlet opening.
  • the inlet ports of all modules, which are in a row, are connected to an ink tank via a common adapter with subsequent ink hose.
  • the adapter is constructed as a liquid distribution element.
  • On its ink outlet side there are nozzles which are pushed onto the inlet nozzles of the modules.
  • On its ink inlet side is a nozzle on which the ink tube is pushed.
  • the problem of pressure equalization for the ink inlet is not taken into account. Both for reasons of unobstructed ink ejection - via a side wall, since sideshooters - and the space required for the ink inlet, a flaky arrangement of the modules is required for this ink print head. This in turn requires a correspondingly large amount of space.
  • a multicolor ink printer is also known, see DE 33 35 614 A1, in which fixed ink lines of different Ink tanks are led to the ink printhead. Because of this stare The ink printhead and ink tanks must always be connected be moved together. That is with the relatively large mass problematic.
  • a stacked type ink print head is made up of individual ones Known modules that work on the edge shooter principle, see DE 44 43 254 C1.
  • the single module consists of three plates arranged one above the other.
  • an inkjet printhead is still between adjacent modules Spacers inserted. About the way of ink supply nothing else is done.
  • a module for an ink printhead is also known, see DE 44 43 245 A1, which consists of two circuit modules and one between the two arranged ink printing module after the Edge shooter principle exists.
  • the ink printing module is from one first cover plate, a middle plate and a second cover plate and composed of piezo actuators on the cover plates are arranged.
  • In the cover plates are ink pressure chambers and in the middle plate is formed with nozzle openings with nozzle channels, where all nozzle openings lie in one plane. It remains here too Ink supply not taken into account.
  • the pressure absorber for an ink printer known, compare EP 0 383 558 A1.
  • the pressure absorber is as separate assembly between an ink tank and a Ink printhead used and each with an ink tube connected to this. In this way, the pressure absorber also serves as Ink supply.
  • the pressure absorber has a pressure compensation membrane. Structure and connection method leave only one one-piece ink printhead based on the edge shooter principle is executed.
  • the invention has for its object an arrangement for To provide ink supply to an ink printhead that is optional from individual modules after the Edge Shooter or after the Sideshooter principle can be assembled in a stacked design.
  • a module according to DE 44 43 254 C1 be assumed, the ink printing module a common Supply channel for the ink supply channels of the ink pressure chambers having. All ink printing modules should be common by means of a flexible connection between an ink hose Ink printhead and ink tank are supplied, one common adapter and ink connector are retained should.
  • a module with its first nozzle continues the print image below the pressure point of the first nozzle of the previous module at a distance that corresponds to a row of nozzles.
  • the resulting spacing of the modules from one another is so sufficient in the arrangement according to the invention that even a generous dimensioning of the components for the ink supply is possible. Since a pressure compensation membrane is already present in the common adapter directly on the ink print head, pressure fluctuations are compensated for faster and better and air suction of the nozzles is counteracted more successfully than if the same was only available after a hose connection or in the ink tank. The same applies to the easily replaceable insertion of a filter in the adapter. Small particles that arrive in the ink line are effectively filtered out, thus protecting the nozzles from clogging.
  • the rubber-elastic connection of the adapter with the ink connection piece and the positive and non-positive connection of the ink connection piece with the tabs on the ink printing module enables a strict separation between the very strict tolerance requirements for the module and the relatively low tolerance requirements for the ink supply device. If the ink print head consists of only one module, it is also possible to integrate the pressure compensation membrane and the filter into the flange part of the ink connection piece.
  • each module 1, 2, 3 is made up of two circuit modules 12, 13; 22, 23; 32, 33 and an ink printing module 11, 21, 31 lying between them are assembled in a stacked construction.
  • first ink printing module 11 is described in more detail. Due to the identical structure, the conditions for the other ink printing modules are analogous, so that these are not discussed in more detail.
  • the ink printing module 11 is equipped on both sides with piezo actuators, which are omitted for reasons of clarity.
  • the ink printing module 11 consists of three superimposed ones Plates 111, 112, 113.
  • the first plate 111 serves as a covering or manner of covering Membrane plate, in the unseen way Ink pressure chambers, ink channels and a common supply channel are molded.
  • the second plate respectively Center plate 112 is used for acoustic and fluidic separation of the Ink pressure chambers in the cover plates 111, 113. It does not contain them shown nozzle channels and nozzle openings.
  • the third plate or second cover plate 113 is analogous to the first plate 111 built.
  • the ink connecting pieces 4, 5, 6 are attached to the ink printing modules 11, 21, 31 laterally parallel to a side edge.
  • the plates 111, 112, 113 are provided with lateral tabs 1111, 1121, 1131.
  • the ink connection piece 4 is adapted to the contour of the tabs 1111, 1121, 1131 and fastened to it with a clamp 43 in a positive and non-positive manner; see also FIGS. 1, 2 and 4. All ink connection pieces 4, 5, 6 are fed with ink via a common adapter 7, which has a pressure compensation membrane 72.
  • a connector 75 is flanged to the adapter 7 on the input side, on the shaft 751 of which the ink tube 8 is pushed.
  • the connector 75 is provided with a collar 752, which is used to flange onto the adapter 7.
  • the tab 1131 is provided with a bore 11310 to which the ink connection piece 4 is docked with an angular bore 46 in the flange part 41 thereof. Both holes 11310 and 46 are sealed by means of a sealing ring 42.
  • the bore 11310 is followed by a recess 11210 in the tab 1121, which extends so far that there is a flow connection to the common supply channels (not shown) in the cover plates 111, 113. This labyrinth connection does not require any major interventions in the plate stack of the ink printing module 1.
  • the ink connection piece 4 is adapted to the contour of the stack of lobes so that the flange part 41 surrounds the latter on three edges, see also FIG. 4a.
  • the flange part 41 is provided with a recess 411, in which the stack of tabs is inserted in a form-adapted manner.
  • the sealing ring 42 is inserted into a further recess 4111 in the recess 411.
  • the required contact pressure for the sealing ring 42 is generated by means of the clamp 43, which is pushed laterally over a bead 412 on the flange part 41 and onto the closed surface of the flap 1111 and thus holds the ink connecting piece 4 and the ink pressure module 1 together in a positive and non-positive manner, see FIG. 4a and 4b.
  • the bracket 43 expediently consists of an ink-resistant spring material. This can be a stainless steel or a suitable polymer, such as acetal copolymer.
  • a pipe part 44 connects to the flange part 41. The flange part 41 is offset so that a shoulder 413 is formed.
  • the tube part 44 is tapered at its free end 441.
  • a hat-shaped sealing sleeve 45 is pushed onto the tube part 44 in such a way that its shaft 451 on the one hand abuts the shoulder 413 and on the other hand its edge 452 is slightly set back relative to the end 441 of the tube part 44. There is a distance between the inner bore of the sealing sleeve 45 and the tapered end 441 of the tubular part 44.
  • the common adapter 7 for the ink connection piece 4, 5, 6 consists of a base body 71 with the pressure compensation membrane 72 and a flange-connected piece 75, see also FIG. 3.
  • a filter 73 and a sealing ring 74 are inserted between the connecting piece 75 and the base body 71.
  • a recess 711 with bores 7111 is provided in the base body 71 and is used for receiving and coupling the ink connecting pieces 4, 5, 6.
  • the ink connecting pieces 4, 5, 6 with the edge 452, 552, 652 of the sealing sleeves 45, 55, 65 are non-positively in the recess 711, and the tapered ends 441, 541, 641 of the tube parts 44, 54, 64 protrude into the assigned bores 7111.
  • the bores 7111 lead into an ink chamber 712 which on the one hand is closed in an atmospheric manner by the pressure compensation membrane 72 and on the other hand is in flow connection with an opening 7131 in the flange part 713.
  • the flange part 713 is attached to the base body 71 orthogonally to the ink chamber 712.
  • the pressure compensation membrane 72 is attached in the form of an ink-resistant, diffusion-tight, resilient plastic film to the base body 71 in a thermally compressive manner or by means of ultrasound.
  • the flange part 713 has a recess 7132 for receiving the filter 73 and a subsequent larger recess 7133 for receiving the sealing ring 74.
  • the connecting piece 75 protrudes into the recess 7133 with the collar 753 projecting from the collar 752.
  • the collar 752 is non-positively on the sealing ring 74.
  • the collar 753 and the recess 7132 for the filter 73 are designed so that the filter 73 is held by the collar 753 and the sealing ring 74 seals with the collar 752.
  • the flange part 713 is provided with a stop 7134, which is adapted to the contour of the collar 752.
  • the connector 75 is screwed onto the flange part 713.
  • the ink tube is pushed onto the shaft 751 of the nozzle 75.

Landscapes

  • Ink Jet (AREA)
EP97250343A 1996-12-09 1997-11-15 Dispositif d'alimentation en encre pour tête d'impression par jet d'encre Expired - Lifetime EP0854042B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19651047 1996-12-09
DE19651047A DE19651047C1 (de) 1996-12-09 1996-12-09 Vorrichtung zur Tintenversorgung eines Tintendruckkopfes

Publications (3)

Publication Number Publication Date
EP0854042A2 true EP0854042A2 (fr) 1998-07-22
EP0854042A3 EP0854042A3 (fr) 1999-10-13
EP0854042B1 EP0854042B1 (fr) 2001-03-14

Family

ID=7814079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97250343A Expired - Lifetime EP0854042B1 (fr) 1996-12-09 1997-11-15 Dispositif d'alimentation en encre pour tête d'impression par jet d'encre

Country Status (3)

Country Link
US (1) US6024443A (fr)
EP (1) EP0854042B1 (fr)
DE (2) DE19651047C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2111991A1 (fr) * 2008-04-23 2009-10-28 Konica Minolta IJ Technologies, Inc. Imprimante à jet d'encre

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637864B2 (en) 2001-01-16 2003-10-28 Eastman Kodak Company Ink supply system for an ink jet printer
DE60308426T2 (de) * 2002-02-14 2007-02-01 Brother Kogyo K.K., Nagoya Tintenstrahldruckkopf und dazugehöriges Herstellungsverfahren
US7399070B2 (en) * 2004-03-09 2008-07-15 Brother Kogyo Kabushiki Kaisha Ink jet printer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703333A (en) * 1986-01-30 1987-10-27 Pitney Bowes Inc. Impulse ink jet print head with inclined and stacked arrays
EP0383558A1 (fr) * 1989-02-17 1990-08-22 Fujitsu Limited Amortisseur de pression d'une imprimante à jet d'encre
DE4309255A1 (de) * 1993-03-16 1994-09-22 Francotyp Postalia Gmbh Modularer Tintenstrahldruckkopf
WO1996013388A1 (fr) * 1994-10-28 1996-05-09 Rohm Co., Ltd. Tete d'impression d'une imprimante a jet d'encre et plaque a ajutages utilisee avec cette tete

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335614A1 (de) * 1983-09-30 1985-04-18 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur drucksteigerung in einem tintentank eines tintendruckers
US4872026A (en) * 1987-03-11 1989-10-03 Hewlett-Packard Company Ink-jet printer with printhead carriage alignment mechanism
DE4443254C1 (de) * 1994-11-25 1995-12-21 Francotyp Postalia Gmbh Anordnung für einen Tintendruckkopf aus einzelnen Tintendruckmodulen
DE4443245C2 (de) * 1994-11-25 2000-06-21 Francotyp Postalia Gmbh Modul für einen Tintendruckkopf

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4703333A (en) * 1986-01-30 1987-10-27 Pitney Bowes Inc. Impulse ink jet print head with inclined and stacked arrays
EP0383558A1 (fr) * 1989-02-17 1990-08-22 Fujitsu Limited Amortisseur de pression d'une imprimante à jet d'encre
DE4309255A1 (de) * 1993-03-16 1994-09-22 Francotyp Postalia Gmbh Modularer Tintenstrahldruckkopf
WO1996013388A1 (fr) * 1994-10-28 1996-05-09 Rohm Co., Ltd. Tete d'impression d'une imprimante a jet d'encre et plaque a ajutages utilisee avec cette tete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2111991A1 (fr) * 2008-04-23 2009-10-28 Konica Minolta IJ Technologies, Inc. Imprimante à jet d'encre
US8075109B2 (en) 2008-04-23 2011-12-13 Konica Minolta Ij Technologies, Inc. Ink jet printer

Also Published As

Publication number Publication date
DE59703139D1 (de) 2001-04-19
EP0854042B1 (fr) 2001-03-14
EP0854042A3 (fr) 1999-10-13
DE19651047C1 (de) 1998-04-16
US6024443A (en) 2000-02-15

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