EP0713777A2 - Agencement de modules individuels d'impression à encre pour une tête d'impression à encre - Google Patents

Agencement de modules individuels d'impression à encre pour une tête d'impression à encre Download PDF

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Publication number
EP0713777A2
EP0713777A2 EP95250207A EP95250207A EP0713777A2 EP 0713777 A2 EP0713777 A2 EP 0713777A2 EP 95250207 A EP95250207 A EP 95250207A EP 95250207 A EP95250207 A EP 95250207A EP 0713777 A2 EP0713777 A2 EP 0713777A2
Authority
EP
European Patent Office
Prior art keywords
ink
modules
ink printing
conductor tracks
piezo actuators
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
EP95250207A
Other languages
German (de)
English (en)
Other versions
EP0713777B1 (fr
EP0713777A3 (fr
Inventor
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 EP0713777A2 publication Critical patent/EP0713777A2/fr
Publication of EP0713777A3 publication Critical patent/EP0713777A3/fr
Application granted granted Critical
Publication of EP0713777B1 publication Critical patent/EP0713777B1/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
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/19—Assembling head units
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/20—Modules

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.
  • printing is carried out as a single franking imprint in one pass of the postal matter.
  • print resolutions of approximately 200 dpi are required, which means ink printheads with the same number of nozzles and piezo actuators with a printing width of one inch.
  • the usual nozzle openings are between 40 and 50 ⁇ m wide.
  • the adjustment errors must be kept below 10 ⁇ m.
  • Such ink printheads 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.
  • piezo actuators 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. The way the modules are arranged in relation to one another in order to achieve a print density of 200 dpi and the contacting of the piezo actuators is a major problem.
  • An ink print head of the type described at the outset is known, DE 42 25 799 A1, which consists of a number of different modules, of which only one module located outside or in the middle carries the common row of nozzles on its end face.
  • Each module consists of a central plate and membrane plates arranged on both sides of it.
  • the ink pressure chambers are located between the membrane plates and the middle plate. All modules have ink pressure chambers for ink ejection that can be driven by piezo actuators Nozzles are connected.
  • 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, which are arranged on the outer wall of the ink pressure chambers and are contacted with conductor tracks running there.
  • a printhead for ink jet printers is also known, EP 0 486 256 A2, which consists of several plates in a stacked construction.
  • the ink pressure chambers and nozzle channels as well as the nozzle openings are worked into piezoelectric plates in the form of openings. It works according to the shear mode principle.
  • each chamber plate in the nozzle area is designed differently from the previous chamber plate by the required offset. That means a corresponding manufacturing effort.
  • the type of drive is problematic with regard to acoustic decoupling and a permanent tight connection between the individual plates.
  • an ink jet print head is known, DE 94 04 328 U1, which consists of two outer smooth membrane plates and a structured middle plate.
  • the ink chambers and the ink channels are molded into the middle plate on both sides, the nozzles are in a row only on one side of the middle plate, analogously to the ink suction spaces.
  • the center plate has vertical and horizontal ink channels.
  • Piezo actuators are arranged on the membrane plates in the areas above the ink chambers.
  • the ink chambers and the ink suction spaces are wider and deeper than the horizontal ink channels. Accordingly, recesses have to be made flat, deeper and continuously. This requires a corresponding technological effort, especially since the recesses can be made to match each other.
  • the piezo actuators are provided on both sides with electrodes in such a way that the outer electrode only partially covers the piezo plate and the inner electrode projects slightly beyond it.
  • An increase in the number of nozzles inevitably results in an increase in the width and length of the print head.
  • an ink print head is also 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 so that the nozzle area and the ink supply area are free.
  • a receiving frame with inclined steps is adapted to this scale-like arrangement.
  • the ink printing modules are provided with elongated holes, are guided by the screws 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. It is possible to replace individual ink printing modules, but only by unsoldering the ribbon conductor and as can be seen from the description, the number of individual parts and the adjustment effort are considerable. A cleaning and sealing station adapted to this ink print head will be very complicated due to the gradation.
  • the purpose of the invention is to simplify the construction of the ink printhead and to improve the service properties.
  • the invention has for its object to provide an arrangement for an ink print head, in which the ink print modules are easily replaceable, the number of different components is reduced and adjustment effort is largely avoided. According to the invention, this object is achieved according to the patent claims.
  • the proposed solution offers a number of advantages. Since the spacer is used according to the invention both as a spacer and as an adjusting piece for the ink printing modules, complicated housings and front masks can be dispensed with.
  • the nozzle row offset in order to achieve the desired printing density is realized exclusively by means of the stop pieces of the spacers, so that the Ink printing modules should be completely identical. 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. Since the recesses for the stop pieces in the ink printing modules always extend in depth into the nozzle plane, an exact spacing of the nozzle planes of the ink printing modules from one another is ensured.
  • the distance s between two nozzle planes is determined exclusively by the distance between the top surfaces of opposing stop pieces of a spacer.
  • the recesses in the ink printing modules can be made during the manufacture of the individual plates of the module by means of laser etching or punching.
  • the stop pieces can also be formed during the manufacture - casting - of the spacer parts from ceramic material by appropriate thickening and shaping. The casting or pressing mold only has to be designed accordingly. If the driver circuits for the piezo actuators are housed on the ink printing modules and the same are provided with plug connectors, the modules can be exchanged particularly easily and, moreover, individual components that are easy to test are available.
  • the assembly and contacting of the piezo actuators is simplified due to the one-piece comb-like design and the extension of all electrodes in one plane.
  • the contact can be made using a low-melting solder, such as indium, or using bond bridges.
  • all electrodes of the piezo actuators face the conductor tracks.
  • the electrodes facing the membrane plates are then expediently connected to one another by a common conductor track.
  • an ink print head consists of three identical ink print modules 1, 3, 5 and two spacer parts 2, 4, which are also arranged between them and are identical.
  • the first ink printing module 1 is composed of a first cover plate 15, a middle plate 16 and a second cover plate 17.
  • the plates can by means of Adhesive or thermal diffusion bonding to be connected.
  • the cover plates 15, 17 are provided in their surface facing the middle plate 16 with ink pressure chambers 151, 171, ink channels 152, 172, nozzle channels 153, 173 and ink supply channels 154, 174, see also FIG. 3. All nozzle openings 175 of the ink printing module 1 run in a row in the second cover plate 17.
  • the nozzle channels 153 are guided from the first cover plate 15 through the central plate 16 as nozzle channels 161 and on to the nozzle channels 173 in the second cover plate 17 and end there as nozzle openings 175.
  • sixteen nozzle openings 175, 375, 575 are provided for each ink printing module 1, 3, 5.
  • a real module will have 64 nozzle openings.
  • Piezo actuators 11, 18 are placed on the outer surfaces of the cover plates 15, 17 in the area above the ink pressure chambers 151, 171, one piezo actuator each above each ink pressure chamber.
  • the cover plates 15, 17 are inevitably thinner in the areas above the ink pressure chambers 151, 171 and act there as a membrane. That is why the designation membrane plate is applicable.
  • the cover plates are thin, smooth membrane plates and to shift all structures into the center plate 16.
  • the piezo actuators 11, 18 are filled in the form of a comb, the back of which is designed as an inactive area and the prongs of the piezoelectric layer 113, 183.
  • Each tine represents a single piezo actuator, the base and top surface of which are covered with electrodes 111, 112, 181, 182.
  • An electrode 112, 182 is the common electrode of all piezo actuators 11, 18 via an end face or the comb back in the inactive region of the Opposite side extends. As a result, the contact can be made from one side or using a mounting technique.
  • the piezo actuators 11, 18 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 151, 171 is avoided.
  • the component can be glued on as a whole using previously applied masking marks.
  • the electrodes 111, 112, 181, 182 are contacted by means of bond bridges with associated conductor tracks 13 which run on the surfaces of the cover plates 15, 17.
  • Driver circuits 12 for the piezo actuators 11, 18 in the form of a module are applied to the first cover plate 15 and also contacted with the conductor tracks 13. So that there is an easily detachable connection to the rest of the printing electronics, a connector 14 is also attached and contacted on the cover plate 15.
  • the conductor tracks 13 are drawn from the second cover plate 17 over both side surfaces of the ink printing module 1 into the surface of the first cover plate 15.
  • the spacer 2 is designed and arranged between the ink printing modules 1 and 3 so that it is aligned with the first ink printing module 1 and is offset from the second ink printing module 3 by the pressure density dimension t (for example 192 drops per inch), see also FIG. 2
  • the thickness of the spacer 2 is dimensioned such that there is a sufficiently large distance between the two ink printing modules 1, 3 with their attached components.
  • the spacer part 2 is provided on both sides with stop pieces 21, 22 which engage in the associated adapted recesses 170, 350, 360 of the ink printing modules 1, 3, see also FIG. 3.
  • the spacer 2 has two pairs of stop pieces 21, 22; in practical implementation there will be three pairs. Accordingly, two recesses would be designed as an elongated hole and one recess as a cylinder hole.
  • the stop piece 21 lies with its top surface in the ink pressure module 1 on the nozzle plane 162.
  • the stop piece 22 lies with its top surface in the ink pressure module 3 at the nozzle plane 376.
  • the parallel spacing of the top surfaces of the opposing stop pieces 21, 22 is equal to the required spacing s of the nozzle planes 162 and 376 from one another.
  • the plate thickness of the spacer 2 is accordingly dimensioned such that the required distance is determined exclusively by the stop pieces 21, 22.
  • the stop piece 21 is shorter than the stop piece 22 by a central plate thickness, since it only penetrates the cover plate 17 in the recess 170.
  • the stop piece 22 penetrates the cover plate 35 in the recess 350 and the middle plate 36 in the recess 360.
  • the recesses 350 and 360 are offset more inwards by the pressure density dimension t than the stop piece 22 on the spacer part 2 In this way, the first nozzle opening 375 of the ink printing module 3 is offset from the first nozzle opening 175 of the ink printing module 1 by the pressure density dimension and, accordingly, the other nozzle openings as well.
  • the spacer 2 is provided with a recess 23 for the piezo actuators 18 and 31 and with a recess 24 for the driver circuits 32 and the connector 34. Since the section AA 'according to FIG. 2 is guided through the outermost nozzle 175 of the first ink printing module 1 and the view to the adjacent outside is shown according to FIG. 3, only the connection from the ink supply channel 154 via the ink channel 152 to the ink pressure chamber is also provided 151, the nozzle channel 153, the nozzle channel 161, the nozzle channel 173 and up to the nozzle opening 175.
  • the ink supply channels 154, 174 are orthogonal to the ink channels 152, 172 and parallel to the nozzle opening row 175.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP95250207A 1994-11-25 1995-08-23 Agencement de modules individuels d'impression à encre pour une tête d'impression à encre Expired - Lifetime EP0713777B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443254A DE4443254C1 (de) 1994-11-25 1994-11-25 Anordnung für einen Tintendruckkopf aus einzelnen Tintendruckmodulen
DE4443254 1994-11-25

Publications (3)

Publication Number Publication Date
EP0713777A2 true EP0713777A2 (fr) 1996-05-29
EP0713777A3 EP0713777A3 (fr) 1997-04-23
EP0713777B1 EP0713777B1 (fr) 2000-03-15

Family

ID=6534963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250207A Expired - Lifetime EP0713777B1 (fr) 1994-11-25 1995-08-23 Agencement de modules individuels d'impression à encre pour une tête d'impression à encre

Country Status (3)

Country Link
US (1) US5850240A (fr)
EP (1) EP0713777B1 (fr)
DE (2) DE4443254C1 (fr)

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JP3952048B2 (ja) * 2003-09-29 2007-08-01 ブラザー工業株式会社 液体移送装置及び液体移送装置の製造方法
US6991098B2 (en) * 2004-01-21 2006-01-31 Silverbrook Research Pty Ltd Consumer tote for a roll of wallpaper
US20060270059A1 (en) * 2005-05-27 2006-11-30 Huang Xiaohua C Modular printing of biopolymer arrays
JP4995470B2 (ja) * 2005-07-20 2012-08-08 エスアイアイ・プリンテック株式会社 インクジェットヘッドおよびインクジェット記録装置
US8087752B2 (en) * 2009-01-30 2012-01-03 Fujifilm Corporation Apparatus for printhead mounting
US8210661B2 (en) * 2009-12-16 2012-07-03 Palo Alto Research Center, Incorporated Stacked slice printhead
CN104245323B (zh) 2011-12-22 2016-08-17 惠普工业印刷有限公司 用于打印头通道内流体的移动的系统和方法
JP6390092B2 (ja) * 2013-12-04 2018-09-19 セイコーエプソン株式会社 液体噴射ヘッドおよび液体噴射装置
DE102014100392A1 (de) * 2014-01-15 2015-07-16 Krones Ag Behälterbehandlungsmaschine zur Bedruckung von Behältern
JP6277731B2 (ja) * 2014-01-17 2018-02-14 セイコーエプソン株式会社 液体噴射ヘッドおよび液体噴射装置
JP6641769B2 (ja) * 2014-11-27 2020-02-05 株式会社リコー 液体吐出ヘッド、液体吐出ユニット及び液体を吐出する装置
JP6868410B2 (ja) * 2017-02-03 2021-05-12 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
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
JP6879138B2 (ja) * 2017-09-08 2021-06-02 コニカミノルタ株式会社 インクジェットヘッド及びインクジェット記録装置
JP7000772B2 (ja) * 2017-09-27 2022-01-19 ブラザー工業株式会社 液体吐出装置
DE102020128910A1 (de) 2020-11-03 2022-05-05 Canon Production Printing Holding B.V. Haltevorrichtung zur Befestigung einer elektrischen Baugruppe an einem Druckkopf und eine entsprechende Druckkopf-Anordnung

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US4703333A (en) 1986-01-30 1987-10-27 Pitney Bowes Inc. Impulse ink jet print head with inclined and stacked arrays
EP0486256A2 (fr) 1990-11-13 1992-05-20 Citizen Watch Co., Ltd. Tête d'impression pour imprimante à jet d'encre
DE4225799A1 (de) 1992-07-31 1994-02-03 Francotyp Postalia Gmbh Tintenstrahldruckkopf und Verfahren zu seiner Herstellung
DE9404328U1 (de) 1994-03-10 1994-05-19 Francotyp Postalia Gmbh Tintenstrahldruckkopf

Also Published As

Publication number Publication date
EP0713777B1 (fr) 2000-03-15
US5850240A (en) 1998-12-15
DE4443254C1 (de) 1995-12-21
EP0713777A3 (fr) 1997-04-23
DE59507996D1 (de) 2000-04-20

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