EP0713775A2 - Agencement pour une tête d'impression à jet d'encre modulaire - Google Patents

Agencement pour une tête d'impression à jet d'encre modulaire Download PDF

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Publication number
EP0713775A2
EP0713775A2 EP95250260A EP95250260A EP0713775A2 EP 0713775 A2 EP0713775 A2 EP 0713775A2 EP 95250260 A EP95250260 A EP 95250260A EP 95250260 A EP95250260 A EP 95250260A EP 0713775 A2 EP0713775 A2 EP 0713775A2
Authority
EP
European Patent Office
Prior art keywords
ink printing
carrier layer
ink
printing modules
arrangement according
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
EP95250260A
Other languages
German (de)
English (en)
Other versions
EP0713775A3 (fr
EP0713775B1 (fr
Inventor
Stephan Günther
Ralf Kubatzki
Wolfgang Dr. Thiel
Junming Dr. Zhang
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 EP0713775A2 publication Critical patent/EP0713775A2/fr
Publication of EP0713775A3 publication Critical patent/EP0713775A3/fr
Application granted granted Critical
Publication of EP0713775B1 publication Critical patent/EP0713775B1/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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14379—Edge shooter
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14491—Electrical connection

Definitions

  • the invention relates to an arrangement for an ink print head, which is composed of ink print modules in stacked construction, which work according to the edge shooter principle and are equipped with plate-shaped piezoelectric actuators.
  • the inkjet print head is intended for use in small, fast printers, which in turn are part of modern machines for franking mail or for printing addresses. Such a printer is also suitable as a product labeling device.
  • the pressure density measure results from the quotient of the nozzle spacing of a module by the number of modules.
  • the usual nozzle openings are between 40 and 50 ⁇ m wide. With a cliché width of one inch and a resolution of 200 dpi, the adjustment errors must be kept below 10 ⁇ m.
  • Such ink print heads are inevitably designed in planar or stacked construction, on the one hand for reasons of the permissible dimensions and the packing density to be achieved therewith and on the other hand for reasons of economical production, see also DE 42 25 799 A1.
  • Surface oscillators are usually used as piezo actuators in which a piezoelectric material, for example lead zirconate titanate (PZT), is arranged between two metal electrodes.
  • PZT lead zirconate titanate
  • the carrier plate - at the same time membrane plate over the ink pressure chambers - for the piezo actuators can consist of glass, ceramic, plastic or metal.
  • An ink print head of the type described at the outset is known, DE 42 25 799 A1, which consists of several different modules, of which only one external module carries the common row of nozzles on its end face. All modules have ink pressure chambers that can be driven by piezo actuators for ink ejection, which are connected to the assigned nozzles via appropriately guided channels. The connection channels from module to module are inevitably orthogonal to the pressure chambers.
  • Spacers are arranged between the modules, which have an ink feed opening and ink feed-through openings and a cutout for the piezo actuators.
  • the spacer parts can be in one part or two parts and consist of the same material as the piezo actuators.
  • connection channels running through several modules, a higher accuracy than that for the ink pressure chambers and a higher adjustment effort are required.
  • the connection channels of different lengths require additional electronic control measures.
  • a piezoelectric ink print head with a monolithic piezoceramic body is also known, DE 38 05 279 A1, which has transducers arranged next to one another in parallel, each transducer having a planar, piezoelectric drive element, a pressure chamber, an ink channel and a nozzle.
  • the pressure chambers, the ink channels and the nozzles are designed as cavities in the piezoceramic body.
  • Each drive element has an outer electrode, an inner electrode and an active piezoceramic layer arranged between the electrodes.
  • the drive elements are piezoelectrically separated from one another by cuts in the active piezoceramic layer.
  • the inner electrodes of the transducers are electrically connected to one another.
  • the electrical connection of the outer and inner electrodes takes place via a connecting strip or a strip conductor.
  • a connection goes to the interconnected inner electrodes.
  • the outer Electrodes are contacted separately with connections.
  • the bottom of the piezoceramic body and the side opposite the nozzle front are attached to a holding frame.
  • An ink connection piece and the connection tape are passed through openings in the holding frame.
  • an ink print head is known, US Pat. No. 4,703,333, in which a plurality of ink print modules which operate according to the side shooter principle are stacked one behind the other in such an inclined manner that on the one hand the nozzle area and on the other hand the ink supply area is free.
  • a receiving frame with inclined steps is adapted to this scale-like arrangement.
  • the ink printing modules are provided with elongated holes through which screws are inserted which engage in the threaded holes of the steps. The modules have to be adjusted with a gauge and then locked with the screws.
  • the individual ink printing module consists of a nozzle plate, an ink channel plate, a pressure chamber plate, a membrane plate with piezo actuators and a cover plate with a recess for a strip conductor for contacting the piezo actuators.
  • An ink supply channel with two ink connection sockets is worked into the cover plate.
  • the purpose of the invention is to simplify the construction of the ink print head, to enlarge the area of use and to improve the service properties.
  • the invention has for its object to provide an arrangement for an ink print head from individual identical ink print modules with staggered rows of nozzles, in which the ink print modules are easy to replace, the number of components is reduced and adjustment effort is largely avoided.
  • the proposed solution offers a number of advantages.
  • the tape conductor in the area between the ink printing modules is used according to the invention both as a contact element and also as a spacer and as an adjusting piece for the ink printing modules, complicated housings and front masks can be dispensed with.
  • the carrier layer of the strip conductor in the area between the ink printing modules so that it acts only as an adjusting piece or only as a spacer. This could be the case if modified ink printing modules are used.
  • the assembly of the tape conductor ends, including driver circuits for the piezo actuators and a connector outside the area between the ink printing modules, can be carried out at the manufacturer of the tape conductor in accordance with the desired specifications.
  • the nozzle row offset in order to achieve the desired print density is only achieved using the stop pieces the carrier layer of the strip conductors, so the ink printing modules can be constructed completely identically. For example, with three ink printing modules, the offset t from module to module is one third of the nozzle opening distance of a module. If the strip conductor is aligned with the preceding ink printing module, the stop pieces facing the subsequent ink printing module are offset more than the assigned adapted recesses in the subsequent ink printing module with respect to a defined side edge of the ink printing module.
  • Opposing pieces of the support layer which determine the offset of adjacent ink printing modules are offset in the same direction parallel to the front edge by the pressure density dimension t. In this way, it is possible to use the same print modules for ink print heads with different numbers of nozzles or ink print modules. The required offset can then be achieved solely by the offset of the stop pieces.
  • the recesses for the stop pieces in the ink printing modules extend in depth to the nozzle level.
  • the stop pieces rest in these recesses with their cover surfaces.
  • the distance s between two nozzle planes is determined exclusively by the distance between the top surfaces of opposing stop pieces of a carrier layer.
  • the accuracy of the spacing of adjacent nozzle levels can be adjusted by precisely observing the distance from the top surface of the abovementioned stop pieces.
  • stop pieces are formed by merely partial thickening of the carrier layer, the required accuracy can already be generated in the casting or pressing mold.
  • stop pieces are made of a different material, such as ceramic or metal, then with an appropriate design of an adhesive form it is also about the design of the adhesive tool and the variation of the adhesive layer the desired accuracy can be achieved.
  • the recesses in the ink printing modules can already be made by means of laser etching or punching during the manufacture of the individual plates of the ink printing module.
  • the ink printing modules and the ribbon conductor ends in between are only stacked on top of one another and then held together non-positively, the modules can be easily replaced. In addition, there are easily verifiable units. This allows an effective inspection in the manufacturing process - thus an increase in the exploitation rate of the ink head manufacturing - and a better service. This is very important, especially since the ink printing modules with their many nozzle openings are still expensive components.
  • the assembly and contacting of the piezo actuators is simplified due to the one-piece comb-like design and extension of all electrodes in one plane.
  • the piezo combs can be produced in a simple manner by first sawing the tooth structure into a square rod made of piezo material. The piezo combs are then sawn off in the form of disks.
  • the contact with the exposed ends of the connecting lines can be made using a low-melting solder, such as indium.
  • an ink print head consists of two identical ink print modules 1, 4 and four ribbon conductors 0, 2, 3, 5 assigned to the same, of which those are identical which are assigned to the same ink print module side.
  • the first ink printing module 1 is composed of a first cover plate 12, a middle plate 13 and a second cover plate 14.
  • the plates can be connected to one another by means of gluing or thermal diffusion bonding.
  • the cover plates 12, 14 are provided in their surface facing the central plate 13 with ink pressure chambers 123, 143, ink channels 124, 144, nozzle channels 126, 146 and ink supply channels 125, 145, see also FIG. 3.
  • All nozzle openings 147 of the ink printing module 1 run in a row in the second cover plate 14.
  • the nozzle channels 126 are guided from the first cover plate 12 through the central plate 13 as nozzle channels 132 and on to the nozzle channels 146 in the second cover plate 14 and end there as nozzle openings 147.
  • sixteen nozzle openings 147, 447 are provided for each ink printing module 1, 4.
  • a real ink printing module will have 64 nozzle openings.
  • Piezo actuators 11, 15 are placed on the outer surfaces of the cover plates 12, 14 in the area above the ink pressure chambers 123, 143, one piezo actuator each above each ink pressure chamber.
  • the cover plates 12, 14 are inevitably thinner in the areas above the ink pressure chambers 123, 143 and act there as a membrane. That is why the designation membrane plate is applicable.
  • An alternative would be to design the cover plates as a thin smooth membrane plate and to shift all structures into the middle plate.
  • the piezo actuators 11, 15 are designed in the form of a comb, the back of which is designed as an inactive region and the prongs of the comb are designed as the active region of a piezo layer 113, 153.
  • Each tine represents a single piezo actuator, the base and top surface of which are covered with electrodes 111, 112, 151, 152.
  • the piezo actuators 11, 15 are combined in one component on the one hand and are spaced apart from one another on the other hand, a complex individual application and alignment over the ink pressure chambers 123, 143 is avoided.
  • the component can be glued on as a whole using previously applied marking signs.
  • the electrodes 111, 112, 151, 152 are connected to associated exposed connecting lines 02, 03, 22, 23 of the strip conductors 0, 2 by means of a low-melting solder, such as indium, see also FIGS. 4 and 5.
  • a low-melting solder such as indium
  • the strip conductors 0.2 lying directly on the ink printing module 1 are designed such that they are on the one hand aligned with the first ink printing module 1 - meaning that stop pieces and associated recesses are positioned in the same way in relation to a defined side edge B - and on the other hand to the following second ink printing module 4 an offset to the pressure density dimension t is effected, see also FIGS. 2, 4 and 5.
  • the thickness of the strip conductors 2 and 3 and 5 and 6 is dimensioned such that between the ink printing modules 1 and 4 and 4 and 5 with their attached piezo actuators 15, 41 and 45, 71 there is a sufficiently large distance.
  • the strip conductor 2 is with stop pieces on both sides 211, 212, which engage in the associated adapted recesses 313 of the strip conductor 3 and in recesses 141, 422, 432 of the ink printing modules 1, 4, see also FIGS. 1, 3, 4 and 5.
  • the strip conductor 3 is provided on both sides with stop pieces 311, 312, which engage in the associated adapted recesses 213 of the strip conductor 2 and in recesses 142, 421, 431 of the ink printing modules 1, 4.
  • the strip conductors 2, 3 have two pairs of stop pieces 211, 212 and 311, 312 for the sake of a simplified representation. In practical implementation, it will be useful to have three pairs of stop pieces. Correspondingly, two groups of the recesses would then be designed as an elongated hole and one group of recesses as a cylinder hole, see FIGS. 4 and 5.
  • the stop piece 211 lies with its top surface in the ink pressure module 1 on the nozzle plane 133.
  • the stop piece 212 lies with its top surface in the ink printing module 4 at the nozzle plane 448.
  • the parallel distance between the top surfaces of the opposite stop pieces 211, 212 of a strip conductor 2 is equal to the required distance s of the nozzle planes 133, 448 from one another.
  • the plate thickness of the strip conductors 2 and 3 is accordingly dimensioned such that the required distance is determined exclusively by the stop pieces 211, 212.
  • the stop pieces 311, 312 of the strip conductor 3 are shorter in FIG. 3 than those of the strip conductor 2. In this case, they act as connecting elements. If the stop pieces 311, 312 were to lie with their cover surfaces against the associated nozzle planes 133, 448, the stop pieces 211, 212 would have to be made shorter.
  • the stop piece 211 is shorter than the stop piece 212 by the plate thickness of the strip conductor 3 and by a middle plate thickness, since it only penetrates the cover plate 14 in the recess 141.
  • the stop piece 212 penetrates the strip conductor 3 in the recess 313, the cover plate 42 in the recess 422 and the middle plate 43 in the recess 432.
  • the recesses 313, 422 and 432 are offset less by the pressure density dimension t than the stop piece 212 on the strip conductor 2.
  • the distance between the recesses 313, 422 and 432 from the side edge In this case, B is dimension c or d.
  • the distance between the stop pieces 212 is correspondingly c + t or d + t.
  • the distance between the recesses 142, 213 from the side edge B is c or d and the distance between the associated stop pieces 311 is c-t or d-t. This applies analogously to all other strip conductors and modules.
  • the first nozzle opening 447 of the second ink printing module 4 is offset from the first nozzle opening 147 of the first ink printing module 1 by the pressure density dimension t, and accordingly the other nozzle openings 447.
  • the strip conductor O is provided with a recess 014 for the piezo actuators 11. Its stop pieces 012 engage in associated adapted recesses 121 and 131 of the ink printing module 1.
  • the strip conductor 2 is provided with a recess 214 for the piezo actuators 15.
  • the strip conductor 3 is provided with a recess 314 for the piezo actuators 41.
  • the ink supply channels 125, 145 are orthogonal to the ink channels 124, 144 and parallel to the row of nozzle openings 147.
  • ink printing modules 1, 4, 7 are constructed identically, and the strip conductors 2 and 5 and the strip conductors 3 and 6 are also constructed identically, stacking of the ink printing modules is possible in the desired manner, with equidistance and lateral offset of the nozzle rows being ensured.
  • the strip conductor 8 is provided with a recess 814 for the piezo actuators 75. Its stop pieces 811 engage in associated recesses 741 of the third ink printing module 7. A further discussion of the ink printing modules 4 and 7 is unnecessary, corresponding information can be found in the list of reference symbols and the drawings.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP95250260A 1994-11-25 1995-10-27 Agencement pour une tête d'impression à jet d'encre modulaire Expired - Lifetime EP0713775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443244 1994-11-25
DE4443244A DE4443244C2 (de) 1994-11-25 1994-11-25 Anordnung für einen Tintendruckkopf aus einzelnen Tintendruckmodulen

Publications (3)

Publication Number Publication Date
EP0713775A2 true EP0713775A2 (fr) 1996-05-29
EP0713775A3 EP0713775A3 (fr) 1997-07-09
EP0713775B1 EP0713775B1 (fr) 1999-10-06

Family

ID=6534957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250260A Expired - Lifetime EP0713775B1 (fr) 1994-11-25 1995-10-27 Agencement pour une tête d'impression à jet d'encre modulaire

Country Status (3)

Country Link
US (1) US5870118A (fr)
EP (1) EP0713775B1 (fr)
DE (2) DE4443244C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016169167A1 (fr) * 2015-04-21 2016-10-27 京东方科技集团股份有限公司 Tête d'impression et dispositif d'impression à jet d'encre

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651048C2 (de) * 1996-12-09 2002-05-29 Francotyp Postalia Gmbh Anordnung für einen Tintendruckkopf
DE19651050C1 (de) * 1996-12-09 1998-03-26 Francotyp Postalia Gmbh Vorrichtung zur Tintenversorgung eines Tintendruckkopfes
EP1121249B1 (fr) * 1998-10-16 2007-07-25 Silverbrook Research Pty. Limited Procede de fabrication d'une buse pour une tete d'impression a jet d'encre
US7216956B2 (en) * 1998-10-16 2007-05-15 Silverbrook Research Pty Ltd Printhead assembly with power and ground connections along single edge
US7287839B2 (en) * 2002-08-19 2007-10-30 Silverbrook Research Pty Ltd Inkjet printhead having bicuspid valved ink ejection arrangement
AU2000242753B2 (en) * 2000-04-18 2004-09-30 Zamtec Limited Ink jet ejector
JP2002178509A (ja) * 2000-12-12 2002-06-26 Olympus Optical Co Ltd 液滴噴射装置
DE20313727U1 (de) * 2003-09-04 2005-01-13 Thinxxs Gmbh Piezoaktor
WO2012165321A1 (fr) * 2011-05-27 2012-12-06 コニカミノルタホールディングス株式会社 Procédé de production de tête à jet d'encre, tête à jet d'encre, procédé de production de structure d'électrification inter-élément et structure d'électrification inter-élément
JP6333586B2 (ja) * 2014-03-12 2018-05-30 エスアイアイ・プリンテック株式会社 液体噴射ヘッド、及び液体噴射装置
JP6872381B2 (ja) * 2017-02-03 2021-05-19 エスアイアイ・プリンテック株式会社 液体噴射ヘッドチップ、液体噴射ヘッドおよび液体噴射装置

Citations (4)

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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
DE3805279A1 (de) 1988-02-19 1989-08-31 Siemens Ag Piezoelektrischer tintendruckkopf und verfahren zu seiner herstellung
GB2264086A (en) 1992-01-31 1993-08-18 Citizen Watch Co Ltd Piezoelectrically-driven drop-on-demand line-printing ink-jet printer.
DE4225799A1 (de) 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung

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DE2349555C2 (de) * 1973-04-25 1983-04-07 Siemens AG, 1000 Berlin und 8000 München Druckkopf für Farbflüssigkeits-Spritzdrucker und dergleichen
WO1981000151A1 (fr) * 1979-07-09 1981-01-22 Burroughs Corp Generateurs de gouttes empiles d'impression a jet d'encre pulse
US4385304A (en) * 1979-07-09 1983-05-24 Burroughs Corporation Stacked drop generators for pulsed ink jet printing
US4392145A (en) * 1981-03-02 1983-07-05 Exxon Research And Engineering Co. Multi-layer ink jet apparatus
DE3528064A1 (de) * 1984-08-06 1986-02-13 Canon K.K., Tokio/Tokyo Fluessigkeitsstrahlaufzeichnungskopf und damit versehenes fluessigkeitsstrahlaufzeichnungsgeraet
US4605939A (en) * 1985-08-30 1986-08-12 Pitney Bowes Inc. Ink jet array
US4752789A (en) * 1986-07-25 1988-06-21 Dataproducts Corporation Multi-layer transducer array for an ink jet apparatus
JPS6337957A (ja) * 1986-08-01 1988-02-18 Seiko Epson Corp インクジエツト記録ヘツド
EP0486256B1 (fr) * 1990-11-13 1997-08-13 Citizen Watch Co., Ltd. Tête d'impression pour imprimante à jet d'encre
JP2843199B2 (ja) * 1992-03-26 1999-01-06 株式会社テック インクジェットプリンタヘッドの製造方法
DE4309255A1 (de) * 1993-03-16 1994-09-22 Francotyp Postalia Gmbh Modularer Tintenstrahldruckkopf

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
DE3805279A1 (de) 1988-02-19 1989-08-31 Siemens Ag Piezoelektrischer tintendruckkopf und verfahren zu seiner herstellung
GB2264086A (en) 1992-01-31 1993-08-18 Citizen Watch Co Ltd Piezoelectrically-driven drop-on-demand line-printing ink-jet printer.
DE4225799A1 (de) 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016169167A1 (fr) * 2015-04-21 2016-10-27 京东方科技集团股份有限公司 Tête d'impression et dispositif d'impression à jet d'encre
US9738073B2 (en) 2015-04-21 2017-08-22 Boe Technology Group Co., Ltd. Printing head and ink-jet printing device

Also Published As

Publication number Publication date
DE59506985D1 (de) 1999-11-11
DE4443244C2 (de) 2000-04-06
US5870118A (en) 1999-02-09
EP0713775A3 (fr) 1997-07-09
EP0713775B1 (fr) 1999-10-06
DE4443244A1 (de) 1996-05-30

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