EP0846556B1 - Tête d'impression à jet d'encre - Google Patents

Tête d'impression à jet d'encre Download PDF

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Publication number
EP0846556B1
EP0846556B1 EP97250344A EP97250344A EP0846556B1 EP 0846556 B1 EP0846556 B1 EP 0846556B1 EP 97250344 A EP97250344 A EP 97250344A EP 97250344 A EP97250344 A EP 97250344A EP 0846556 B1 EP0846556 B1 EP 0846556B1
Authority
EP
European Patent Office
Prior art keywords
ink
module
adapter
modules
ink print
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
EP97250344A
Other languages
German (de)
English (en)
Other versions
EP0846556A3 (fr
EP0846556A2 (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 EP0846556A2 publication Critical patent/EP0846556A2/fr
Publication of EP0846556A3 publication Critical patent/EP0846556A3/fr
Application granted granted Critical
Publication of EP0846556B1 publication Critical patent/EP0846556B1/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
    • B41J2/145—Arrangement thereof
    • 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 several modules in stacked construction or is equipped with only one module.
  • Such 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. If the ink print head is composed of several components, the precise arrangement of the same with one another and with one another has a decisive influence on its reliable function. As is known, reliability also increases as the number of individual parts decreases. The invention starts at these two points.
  • each module has a number of nozzles and consists of a plurality of plates arranged one above the other with incorporated 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.
  • the modules are stacked one behind the other so that the nozzle area and the ink supply area are free. This in turn requires a correspondingly large amount of space.
  • a receiving frame for the modules is provided, which has inclined steps - one step for each module - and a common opening for the nozzle area of all modules.
  • the modules are provided with elongated holes through which screws are inserted which engage in the threaded holes in the steps. The modules have to be adjusted with a gauge and then locked with the screws. 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.
  • an ink print head in stacked construction is known from individual identical modules which work according to the edge shooter principle and which are assembled according to the "interlaced principle", compare EP 0 615 844 B1.
  • the modules are held at an equal distance from each other by means of spacers and fastened in a module carrier which has a front plate with a common opening for the nozzle surfaces of all modules and separate fastening elements for each module. Staggered stop edges for the modules are worked into the opening. Accordingly, each module has a reference edge with a highly precise distance from the first nozzle of its row of nozzles. In this way, the staggered arrangement is realized according to the "interlaced principle".
  • the individual module consists of three plates arranged one above the other; a middle plate and two cover plates.
  • the nozzles are molded into one of the cover plates so that the middle plate forms a nozzle wall.
  • the spacers are attached to the modules so that their nozzle rows are kept at equidistance. Three spacers are provided per module, so that the distance is formed by three-point contact. The distance is determined by the length of the spacers, since they are touching each other in a row.
  • the modules are accordingly provided with three through holes through which the spacers are guided.
  • the spacers are designed so that they rest in the edge area on the central plate of the module on the surface that is involved in the nozzle formation.
  • the spacers are attached to the middle plate in their contact area by gluing or soldering.
  • the purpose of the invention is to simplify the construction of the ink printhead, an increase in the area of application and an improvement the service characteristics.
  • the invention has for its object to provide an ink print head to create the simplest possible structure, with little Individual components and the subsequent adjustments of the Individual components to each other are eliminated.
  • the print head is designed to both from a single module as well as from several identical ones Modules according to the edge shooter principle in stacked construction can.
  • a simple, self-adjusting structure is achieved by inserting identical modules with a single, precise reference edge in assigned equidistant slots in a base plate with a stop in a force-fitting and form-fitting manner in a housing.
  • the elastic mounting by means of an already existing and necessary common adapter for the ink connection piece of the modules and a single spring element, which is designed as a one-piece stamped and bent part, has other advantages in addition to the advantages already mentioned.
  • the modules are only inserted when spring forces are exerted - rubber-elastic coupling of the adapter and spring-elastic by the spring element made of stainless steel - overloading and damage to the modules are safely avoided and a separation between the very strict tolerance requirements for the module and the relatively low tolerance requirements achieved for the attachment of the holding elements.
  • the spring element can be produced with a suitable follow-up tool without any particular difficulty for any number of modules with the required accuracy, since only the distance between the legs of the hold-down device has to be observed. With the hold-down devices, the modules are not only pressed against the base plate with their shoulders, but are also kept equidistant in the area away from the nozzle area. The situation is correspondingly simpler when the ink print head is designed with only one module.
  • the holder is carried out analogously by means of an adapter for only one ink connection piece and a spring element with only one hold-down device.
  • an adapter for only one ink connection piece and a spring element with only one hold-down device.
  • modules 1 are arranged obliquely in the housing 4, aligned with one another and equidistant from one another.
  • the modules 1 protrude with their connections 14 into assigned bores 311 of a bus board 31.
  • the connections 14 are soldered to the bus board 31.
  • the bus board 31 is part of the bus adapter 3, which is connected to a central control and power supply via the strip conductor 32 and the plug connector 33. In this way, the modules 1 are electrically connected to one another and to the central control.
  • ink connecting pieces 15 which are connected to one another by means of the common adapter 2 and are connected to an ink supply.
  • the adapter 2 is fastened with its base body 21, which has fastening holes 211, to associated screw bushings 411 by means of screws 212.
  • the screw bushings 411 are integrally formed on the frame 41.
  • Screw bushings 412 for fastening the cover 43 to the frame 41 are also formed accordingly.
  • the cover 43 and the angle 6 are fastened together by means of screws 432. For this purpose, both have fastening holes 431, 61 at the same distance.
  • a module 1 consists of an ink printing module 11 and circuit modules 12, 13 arranged on both sides thereof with the common connections 14.
  • the ink connection piece 15 is fastened parallel to a side edge 110 of the ink printing module 11 by means of a U-shaped bracket 1511 made of a stainless spring steel.
  • the ink connection piece 15 has a flange part 151 and a pipe part 152, onto which a hat-shaped sealing sleeve 153 made of a rubber-elastic material, such as silicone rubber, is pushed.
  • the sealing sleeve 153 rests on the one hand with its shaft 1531 on a shoulder 1514 of the flange part 151 and on the other hand with its edge 1532 on the base body 21 of the adapter 2, see also FIG. 2.
  • the ink printing module 11 consists of three plates 111, 112, 113 one above the other or one behind the other, which are provided with a tab 1111, 1121, 1131 on the side for the purpose of mechanical and fluidic coupling of the ink connecting piece 15.
  • the flange portion 151 of the ink connection piece 15 is provided on the one hand with a recess 1512 for receiving the tabs 1111, 1121, 1131 of the ink printing module 11, as well as one leg of the clip 1511, and on the other hand with a bead 1513 for locking the other leg of the clip 1511.
  • the clamp 1511 is positively and non-positively on the one hand on the flange side with the bead 1513 and on the other hand on an externally closed smooth tab 1111.
  • Each ink pressure module 11 projects with its nozzle surface 10 into the slot 421 of the base plate 42 assigned to it and is pressed by the spring element 5 against an end face 4210 of the slot 421.
  • a compartment for receiving the spring element 5 is formed by means of webs 415 formed on the frame 41.
  • the spring element 5 is inserted into this compartment and is held in a form-fitting manner by means of locking lugs 413 provided on the frame 41.
  • a bore 414 is provided for receiving the pivot axis 7 for the ink print head.
  • FIG. 4 shows clearly how the ink printing module 11 is inserted into the slot 421 of the base plate 42.
  • the ink printing module 11 is pushed so far into the slot 421 that its nozzle surface 10 lies at least in one plane with the outer surface of the base plate 42 or projects beyond it. In this way, cleaning of the nozzle surface 10 is made possible by means of a wiper lip and wiped-off quantities are kept away from the same.
  • the ink printing module 11 rests on the base plate 42 with both shoulders 101 formed by all the plates 111, 112, 113 and with a side edge 110 of the center plate 112 containing the nozzles against the end face 4210 of the slot 421 in the base plate 42.
  • the contact pressure against the base plate 42 is generated jointly by means of the adapter 2 and the spring element 2.
  • the spring element 2 presses with the hold-down device 541 or with its cross bar 5412 on the upper edge 114 and with the pressure flap 551 against a second side edge 115 of the ink printing module 11, see also FIG. 5.
  • the spring element 2 is produced as an integral, box-shaped stamped and bent part from an ink-resistant spring material, such as stainless steel.
  • the spring element 2 has a rectangular rear wall 51 and side walls 52, 53, 54, 55 which are angled orthogonally from the rear wall 51.
  • the rear wall 51 is provided with two rectangular recesses 511 for the latching lugs 413 on the frame 41.
  • the side walls 52, 53 are wedge-shaped in the joining direction of the spring element 2 and lie opposite one another.
  • the upper side wall 54 is slotted and angled orthogonally at the ends so that a hold-down device 541 is formed for each module 1.
  • the hold-down device 541 consists of two parallel legs 5411 and a final cross bar 5412. When the spring element 2 is inserted, the legs 5411 enclose the ink pressure module 11 in the region of the second side edge 115, see also FIGS. 3 and 4.
  • the lower side wall 55 is also slotted but angled inward at the ends, so that a pressure tab 551 is formed for each module 1. As previously stated, the individual pressure flap 551 presses against the side edge 115 of the ink printing module 11.
  • the conditions for the design of the ink print head with only one module 1 can be derived from FIG. 3.
  • the unoccupied slots 421 in the base plate 42 are then sealed and the adapter 2 need only be designed for an ink printing module 11. It is obvious that in the case of an ink print head with only one module 1 with a sufficient number of nozzles, the control effort can be significantly reduced and there is a greater range of uses, for example in product labeling devices.

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (9)

  1. Tête d'impression à encre qui se compose de plusieurs modules en mode de construction empilée, avec les caractéristiques suivantes:
    des modules identiques (1), équidistants et s'alignant entre eux et pénétrant avec leurs surfaces de buses (10) dans une rainure affectée (421) de la plaque de fond (42) du boítier (4), sont fixés mécaniquement et complémentairement dans un boítier (4) au moyen d'un élément à ressort (5) et d'un adaptateur commun (2) pour des tubulures de raccordement d'encre (15) des modules (1),
    les modules (1) reposent avec une arête latérale (110) formée comme arête de référence sur une surface frontale (4210) de la rainure (421) et avec des épaules (101) formées sur les extrémités des surfaces de buse (10) à l'intérieur sur la plaque de fond (42) et s'élèvent avec leurs surfaces de buse (10) au moins jusque dans le plan formé par le côté extérieur de la plaque de fond (42),
    les modules (1) sont reliés électriquement avec un adaptateur de bus (3).
  2. Tête d'impression à encre, avec les caractéristiques suivantes:
    un module (1) pénétrant avec sa surface du buse (10) dans une rainure affectée (421) de la plaque de fond (42) du boítier (4) est fixé mécaniquement et complémentairement dans un boítier (4) au moyen d'un élément à ressort (5) et d'un adaptateur (2) pour des tubulures de raccordement d'encre (15) du module (1),
    le module (1) repose avec une arête latérale (110) formée comme arête de référence sur une surface frontale (4210) de la rainure (421) et avec des épaules (101) formées sur les extrémités des surfaces de buse (10) à l'intérieur sur la plaque de fond (42),
    le module (1) est relié électriquement avec un adaptateur de bus (3).
  3. Tête d'impression à encre selon les revendications 1 et 2,
    caractérisée en ce que
    chaque module (1) se compose d'un module d'impression à encre (11) et de modules de commutation (12, 13) agencés des deux côtés de celui-ci et qui sont reliés via des branchements communs (14) à une platine de bus (31) de l'adaptateur de bus (3) qui, à son tour, peut être relié à un micro-ordinateur via un conducteur méplat (32) comportant un connecteur (33).
  4. Tête d'impression à encre selon les revendications 1 à 3,
    caractérisée en ce que
    chaque module d'impression à encre (11) est pourvu parallèlement à une arête latérale (110) d'une tubulure de raccordement d'encre (15) sur laquelle est posé l'adaptateur (2) d'une manière souple et gommo-élastique, qui, à son tour, présente une bride (22) avec une tubulure (221) sur laquelle on peut emmancher un tuyau à encre qui est relié à un réservoir d'encre et en ce que l'adaptateur (2) est fixé, d'une manière séparable, dans le boítier (4).
  5. Tête d'impression à encre selon la revendication 4, caractérisée en ce que, le module d'impression à encre (11) se compose de trois plaques superposées (111, 112, 113) qui sont pourvues latéralement, dans le but d'un accouplement mécanique et fluide de la tubulure de raccordement d'encre (15), d'une patte (1111, 1121, 1131) et
    en ce que la tubulure de raccordement d'encre (15) présente une bride (151) et un tuyau (152) avec un manchon d'étanchéité (153) gommo-élastique emmanché ainsi qu'une agraphe essentiellement en U (1511) destinée à la fixation de la bride (151) sur le module d'impression à encre (11),
    en ce que la bride (151) est pourvue d'un évidement (1512) pour les pattes disposées les unes sur les autres (1111, 1121, 1131) et d'un bourrelet (1513) pour le blocage de l'agraphe (1511),
    en ce que l'agraphe (1511) repose mécaniquement d'une part sur le côté bride avec le bourrelet (1513) et d'autre part sur une patte fermée extérieurement (1111) et
    en ce que le manchon d'étanchéité (153), composé d'un manche (1531) et bord (1532), est exécuté en forme de chapeau et repose avec une extrémité du manche (1531) sur un épaulement (1514) de la bride (151).
  6. Tête d'impression à encre selon les revendications 1 à 2,
    caractérisée en ce que,
    le boítier (4) se compose d'un cadre (41), de la plaque de fond (42) et d'un couvercle (43),
    en ce qu'on prévoit dans le cadre (41) des douilles à vis (411) pour fixer l'adaptateur (2) et des douilles à vis (412) pour fixer le couvercle (43) ainsi que des nez d'encliquetage (413) pour l'élément de ressort (5) et en ce que la plaque de fond (42) est fixée dans le cadre (41) au moyen d'un assemblage à enclenchement.
  7. Tête d'impression à encre selon la revendication 1 à 2,
    caractérisée en ce que,
       l'élément de ressort (5) est exécuté comme une pièce découpée et pliée d'un tenant en forme de coffret en acier inoxydable avec
    une paroi arrière de forme rectangulaire (51),
    une paire de parois latérales (52, 53), coudées orthogonalement à partir de la paroi arrière (51), cunéiformes et se faisant face,
    une paroi latérale (54) coudée orthogonalement à partir de la paroi arrière (51), rainurée et encore une fois coudée orthogonalement vers l'extérieur, et
    une paroi latérale (55) coudée orthogonalement à partir de la paroi arrière (51) et coudée encore une fois en biais vers l'intérieur.
  8. Tête d'impression à encre selon les revendications 1 à 2 et 4 à 7,
    caractérisée en ce que,
    dans le boítier (4), un compartiment destiné à la réception de l'élément de ressort (5) est formé au moyen de traverses (415) formée sur le cadre (41),
    en ce que la paroi arrière (51) est pourvue d'au moins un évidement (511) adapté au nez d'encliquetage (413),
    en ce que l'élément de ressort (5), une fois introduit, repose avec ses parois latérales (52), 53) et la paroi arrière (51) sur les traverses (415) et le nez d'encliquetage (413) pénètre dans l'évidement (511),
    en ce que la paroi latérale rainurée (54) présente pour chaque module (1) un presseur élastique (541) qui se compose de deux jambes parallèles (5411) et d'une traverse transversale (5412) terminant celles-ci,
    en ce que le module (1) avec son module d'impression à encre (11) est maintenu d'un côté, à l'extérieur, entre les jambes du presseur (541) qui, à son tour, repose mécaniquement avec sa traverse transversale (5412) sur le bord supérieur (114) du module d'impression à encre (11) et presse donc celui-ci avec l'épaulement (101) se situant en dessous contre la plaque de fond (42),
    en ce que la paroi latérale inférieure (55) présente pour chaque module (1) une patte de pression élastique (551) qui presse le module d'impression à encre (11) avec son bord latéral (110) contre la surface frontale (4210) de la rainure (421) dans la plaque de fond (42),
    en ce que l'adaptateur (2) repose mécaniquement sur le/les tubulure(s) de raccordement d'encre (15) et par conséquent presse le/les module(s) d'impression à encre (11) avec le/les épaulement(s) se trouvant au-dessous contre la plaque de fond (42),
    en ce que l'adaptateur (2) se compose d'un corps de base (21) avec des trous de fixation (211) et d'une bride (22) avec une tubulure (221) et en ce que la bride (22) est vissée sur des douilles à vis (411) et la tubulure (221) est prévue pour emmancher un tuyau d'encre.
  9. Tête d'impression à encre selon la revendication 1 à 2,
    caractérisée en ce que,
    chaque module (1) dans la zone de rainure de la plaque de fond (42) est entouré d'une masse de compensation et d'étanchéité qui étanchéifie la rainure (421) vers l'intérieur et l'extérieur.
EP97250344A 1996-12-09 1997-11-15 Tête d'impression à jet d'encre Expired - Lifetime EP0846556B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19651048A DE19651048C2 (de) 1996-12-09 1996-12-09 Anordnung für einen Tintendruckkopf
DE19651048 1996-12-09

Publications (3)

Publication Number Publication Date
EP0846556A2 EP0846556A2 (fr) 1998-06-10
EP0846556A3 EP0846556A3 (fr) 1999-05-12
EP0846556B1 true EP0846556B1 (fr) 2001-05-16

Family

ID=7814080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97250344A Expired - Lifetime EP0846556B1 (fr) 1996-12-09 1997-11-15 Tête d'impression à jet d'encre

Country Status (3)

Country Link
US (1) US6135587A (fr)
EP (1) EP0846556B1 (fr)
DE (2) DE19651048C2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457804B1 (en) * 2000-04-25 2002-10-01 Hewlett-Packard Company Spring for latching a print cartridge in a carriage
US6481829B1 (en) 2001-09-18 2002-11-19 Lexmark International, Inc. Manually actuated carrier latch mechanism
US7417141B2 (en) * 2004-08-09 2008-08-26 Silverbrook Research Pty Ltd Cyanine dye having reduced visible absorption
JP4245034B2 (ja) * 2006-10-18 2009-03-25 セイコーエプソン株式会社 液体噴射装置
JP7107776B2 (ja) * 2018-07-25 2022-07-27 東芝テック株式会社 インクジェットヘッド及びインクジェット記録装置

Family Cites Families (12)

* 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
US4872026A (en) * 1987-03-11 1989-10-03 Hewlett-Packard Company Ink-jet printer with printhead carriage alignment mechanism
US5461405A (en) * 1989-10-30 1995-10-24 Eastman Kodak Company Ink jet printer device with exchangeable printheads
JPH05508357A (ja) * 1989-10-30 1993-11-25 イーストマン コダック カンパニー 交換可能なプリンタヘッドを有するインキジェットプリンタ列装置
DE4309255A1 (de) * 1993-03-16 1994-09-22 Francotyp Postalia Gmbh Modularer Tintenstrahldruckkopf
JP3585939B2 (ja) * 1993-04-19 2004-11-10 キヤノン株式会社 記録ヘッドユニットおよび該ユニットを用いたインクジェット記録装置
JPH06316066A (ja) * 1993-05-07 1994-11-15 Canon Inc インクジェットヘッド及びインクジェット記録装置
JPH06344548A (ja) * 1993-06-07 1994-12-20 Canon Inc インクジェット記録装置
US5563641A (en) * 1994-09-23 1996-10-08 Compaq Computer Corporation Removable orifice plate for ink jet printhead and securing apparatus
CN1085967C (zh) * 1994-10-28 2002-06-05 罗姆股份有限公司 喷墨印刷头及其使用的喷嘴板
DE4443244C2 (de) * 1994-11-25 2000-04-06 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

Also Published As

Publication number Publication date
EP0846556A3 (fr) 1999-05-12
EP0846556A2 (fr) 1998-06-10
DE59703541D1 (de) 2001-06-21
DE19651048C2 (de) 2002-05-29
DE19651048A1 (de) 1998-06-10
US6135587A (en) 2000-10-24

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