EP0216176A1 - Arrangement of outlet orifices of a print head in a multicolour ink printer - Google Patents

Arrangement of outlet orifices of a print head in a multicolour ink printer Download PDF

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Publication number
EP0216176A1
EP0216176A1 EP86111831A EP86111831A EP0216176A1 EP 0216176 A1 EP0216176 A1 EP 0216176A1 EP 86111831 A EP86111831 A EP 86111831A EP 86111831 A EP86111831 A EP 86111831A EP 0216176 A1 EP0216176 A1 EP 0216176A1
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EP
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Prior art keywords
outlet openings
ink
quality
writing
print head
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Granted
Application number
EP86111831A
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German (de)
French (fr)
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EP0216176B1 (en
Inventor
Rüdiger Dipl.-Ing. Hillmann (FH)
Artur Dipl.-Ing. Milbrandt
Hubertus Dipl.-Ing. Reinfeld (Fh)
Emmeran Dipl.-Ing. Vollert
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Siemens AG
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Siemens AG
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    • 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
    • B41J2/52—Arrangement for printing a discrete number of tones, not covered by group B41J2/205, e.g. applicable to two or more kinds of printing or marking process
    • 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

Definitions

  • the invention relates to an arrangement for the outlet openings in the print head of a multicolor ink writing device according to the preamble of patent claim 1.
  • Terminal or output devices in modern office communication or data processing systems require both the display of text and graphics.
  • a high output speed is required for the text display, whereby reduced requirements for the font quality are accepted.
  • draft quality or draft quality DQ In addition, there should also be the possibility of displaying texts in very good font quality. In this case, you accept a reduced output speed.
  • This font quality is known as the so-called Near Letter Quality NLQ.
  • a multicolored display is increasingly required for graphic display.
  • ink writing devices have proven to be suitable as devices which can meet these requirements.
  • These are devices that have a so-called ink print head for displaying characters or graphics.
  • such an ink print head has a plurality of outlet openings in the form of so-called nozzles, from which individual droplets are ejected under the action of individually controllable piezoelectric drive elements, which droplets move relative to the print head Form the grid in the form of the desired sign or graphic pattern.
  • Devices that meet the requirements mentioned above suffer from the disadvantage that only one of the requirements is fully met, the others are only offered with a greater or lesser loss of quality.
  • the object of the invention is to provide an arrangement for the nozzle outlet openings of the printhead of an ink writing device, with which the display of texts is possible both in draft and in fine writing quality, and with which multicolored texts or graphics of high quality can also be displayed.
  • the exemplary embodiment shown shows a write head 1 of an ink writing device known per se, in front of which a recording medium 2 is located.
  • the print head 1 essentially consists of an ink supply system 3, which is connected on the one hand to the ink channels 8 running inside the print head 1 and on the other hand to different ink containers 10, 11, 12, 13 which contain ink of different colors. It is known to use black, cyan, magenta and yellow inks to represent multicolored characters and graphics.
  • the ink channels 8 are each assigned individually controllable drive elements 9, preferably piezoelectric transducers. They end at the front end of the write head 1 facing the recording medium 2 on a nozzle plate 14 the outlet openings of which, according to the control, eject individual ink droplets at a relatively high speed and spray them against the recording medium 2.
  • black nozzles are provided for the ejection of ink droplets of black color.
  • Each of the m outlet openings in the example, the m 5 outlet openings 50 to 54, 60 to 64 to and 70 to 74, are provided for ejecting ink droplets of different colors. These are referred to below as paint nozzles.
  • paint nozzles are the basic colors in the so-called subtractive color mixing system, in the example the colors cyan, magenta and yellow.
  • All outlet openings 40 to 49, 50 to 54, 60 to 64 and 70 to 74 are each arranged in the vertical direction at a distance a, where a is determined by the grid provided for the character display and is selected such that the individual ink dots plotted in the grid Representation in the so-called design quality corresponds.
  • At least the number n of black nozzles is selected so that it covers the height of a writing line provided by the character grid. This ensures that a design-quality representation can take place in a single pass.
  • the number of m outlet openings for the paint nozzles can be smaller (mn). However, they are arranged at the same height in the horizontal direction as the black nozzles. This enables the printing dots of the color black to no longer be formed by mixing the three basic colors in multi-color printing, but instead rather they are created by black ink droplets.
  • a 9 ⁇ 9 character grid is defined for the display of text in the design quality.
  • the write head 1 in the example moves from left to right at a constant speed.
  • droplet ejection from selected outlet openings takes place at each time of printing via a printer control.
  • the printing times are defined here by grid columns S1 to S9. In this way, as shown in Fig.
  • character "A” is constructed in design quality.
  • the characters of a writing line are printed during one pass. This is followed by a transport of the recording medium 2 by one line height, so that the next writing line can be printed in the same way while the rewinding of the writing head.
  • the display of characters or graphics in the higher-quality NLQ font quality takes place in the so-called multipass mode, which means that there are several passes per write line for the display of the characters, whereby on the one hand the relative movement between the recording medium and the write head takes place in fine steps and on the other hand the print cycle accordingly a fine division of the grid clock is given.
  • the first measure is implemented by a micro-line circuit.
  • the second measure is achieved in that the printer controller generates additional pressure pulses in so-called half-steps.
  • Fig. 3 shows that under these conditions, a character is displayed in a 17 ⁇ 17 grid.
  • the imprint of the character "A” is done in such a way that the dashed head 1 is first moved in the direction 15, the printer controller emitting pressure pulses at all horizontal printing points, namely at the screen columns determined by a half-printing step. In this way, the horizontal line of the character "A” is formed by a correspondingly larger number of pressure points.
  • the printer controller triggers an advance of the recording medium 2, which corresponds to half the distance a between the outlet openings 40 to 49.
  • the write head 1 now occupies position 16 with respect to the record carrier 2. When the write head 1 returns in the direction 17, the vertical and the oblique lines of the character "A" are thus filled.

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

Abstract

Die Erfindung betrifft eine Anordnung für die Austrittsöffnungen im Druckkopf einer Mehrfarben-Tintenschreibeinrichtung; dabei bilden die n Austrittsöffnungen (40 bis 4n) für Tintentröpfchen schwarzer Farbe eine erste vertikale Reihe; die m Austrittsöffnungen (50 bis 5m, 60 bis 6m, 70 bis 7m) für Tintentröpfchen der weiteren Grundfarben bilden jeweils weitere vertikale Reihen; innerhalb jeder Reihe haben die Austrittsöffnungen einen Abstand a; nach einem Durchlauf des Schreibkopfes (1) über den Aufzeichnungsträger (2) findet eine Relativbewegung zwischen Schreibkopf (1) und Aufzeichnungsträger (2) wahlweise mindestens um eine halbe Schreibzeilenhöhe oder um einen Wert statt, der dem halben Teilungsabstand der Austrittsöffnungen entspricht (a/2); zumindest die Anzahl der Austrittsöffnungen (40 bis 4n) der ersten Reihe sowie der Teilungsabstand (a) sind derart gewählt, daß bei einem Durchlauf des Schreibkopfes (1) die Zeichen in Entwurfsqualität (DQ) darstellbar sind; die Darstellung der Zeichen in Schönschreibqualität (NLQ) erfolgt im sogenannten Multipassbetrieb (Fig. l).The invention relates to an arrangement for the outlet openings in the print head of a multicolor ink writing device; the n outlet openings (40 to 4n) form a first vertical row for black ink droplets; the m outlet openings (50 to 5m, 60 to 6m, 70 to 7m) for ink droplets of the other primary colors each form further vertical rows; the outlet openings are spaced a within each row; After the write head (1) has passed over the record carrier (2), there is a relative movement between the write head (1) and the record carrier (2) either by at least half a line height or by a value that corresponds to half the pitch of the outlet openings (a / 2 ); at least the number of outlet openings (40 to 4n) in the first row and the spacing (a) are selected such that the characters can be displayed in draft quality (DQ) when the write head (1) is run through; the display of the characters in fine writing quality (NLQ) takes place in the so-called multipass mode (Fig. l).

Description

Die Erfindung betrifft eine Anordnung für die Austritts­öffnungen im Druckkopf einer Mehrfarben-Tintenschreibein­richtung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an arrangement for the outlet openings in the print head of a multicolor ink writing device according to the preamble of patent claim 1.

End- oder Ausgabegeräte in modernen Bürokommunikations- oder datenverarbeitenden Anlagen erfordern sowohl die Darstellung von Texten als auch von Grafiken. Dabei wird für die Textdarstellung eine hohe Ausgabegeschwindigkeit gefordert, wobei reduzierte Anforderungen an die Schrift­qualität in Kauf genommen werden. Man spricht in diesem Zusammenhang von einer sogenannten Entwurfsqualität oder Draft Quality DQ. Daneben soll aber auch die Möglichkeit bestehen, Texte in sehr guter Schriftqualität darzustel­len. In diesem Falle nimmt man eine reduzierte Ausgabe­geschwindigkeit in Kauf. Diese Schriftqualität wird als sogenannte Near Letter Quality NLQ bezeichnet. Für grafische Darstellung wird zunehmend eine mehrfarbige Darstellung gefordert.Terminal or output devices in modern office communication or data processing systems require both the display of text and graphics. A high output speed is required for the text display, whereby reduced requirements for the font quality are accepted. In this context, one speaks of a so-called draft quality or draft quality DQ. In addition, there should also be the possibility of displaying texts in very good font quality. In this case, you accept a reduced output speed. This font quality is known as the so-called Near Letter Quality NLQ. A multicolored display is increasingly required for graphic display.

Als Geräte, die diese Anforderungen erfüllen können, haben sich die sogenannten Tintenschreibeinrichtungen als geeignet erwiesen. Es handelt sich dabei um Geräte,die zur Darstellung von Zeichen oder von Grafik einen sogenannten Tintendruckkopf aufweisen. Ein derartiger Tintendruckkopf hat, wie allgemein bekannt, mehrere als sogenannte Düsen ausgebildete Austrittsöffnungen, aus denen unter Einwirkung individuell ansteuerbarer piezo­elektrischer Antriebselemente Einzeltröpfchen ausgestoßen werden, die auf einen relativ zum Druckkopf bewegten Auf­ zeichnungsträger rasterförmig das gewünschte Zeichen oder das gewünschte grafische Muster bilden. Geräte, die den oben erwähnten Forderungen entsprechen, leiden unter dem Nachteil, daß jeweils nur eine der Forderungen voll er­füllt wird, die anderen jeweils nur mit mehr oder weniger großer Qualitätseinbuße angeboten werden.The so-called ink writing devices have proven to be suitable as devices which can meet these requirements. These are devices that have a so-called ink print head for displaying characters or graphics. As is generally known, such an ink print head has a plurality of outlet openings in the form of so-called nozzles, from which individual droplets are ejected under the action of individually controllable piezoelectric drive elements, which droplets move relative to the print head Form the grid in the form of the desired sign or graphic pattern. Devices that meet the requirements mentioned above suffer from the disadvantage that only one of the requirements is fully met, the others are only offered with a greater or lesser loss of quality.

Aufgabe der Erfindung ist es, eine Anordnung für die Dü­senaustrittsöffnungen des Druckkopfes einer Tintenschreib­einrichtung anzugeben, mit der die Darstellung von Texten sowohl in Entwurfs- als auch in Schönschriftqualität mög­lich ist, und mit der auch mehrfarbige Texte oder Grafi­ken hoher Qualität dargestellt werden können.The object of the invention is to provide an arrangement for the nozzle outlet openings of the printhead of an ink writing device, with which the display of texts is possible both in draft and in fine writing quality, and with which multicolored texts or graphics of high quality can also be displayed.

Gelöst wird diese Aufgabe durch die kennzeichnenden Merk­male des Patentanspruches 1.This object is achieved by the characterizing features of patent claim 1.

Die Erfindung wird im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispieles erläutert. Das dargestellte Ausführungsbeispiel zeigt einen Schreibkopf 1 einer an sich bekannten Tintenschreibein­richtung,vor dem sich ein Aufzeichnungsträger 2 befindet. Der Schreibkopf 1 bsteht im wesentlichen aus einem Tin­tenversorgungssystem 3, das einerseits mit den im Inneren des Schreibkopfes 1 verlaufenden Tintenkanälen 8 und an­dererseits mit verschiedenen Tintenbehältern 10, 11, 12, 13 verbunden ist, die Tinte verschiedener Farbe enthal­ten. Es ist bekannt, zur Darstellung von mehrfarbigen Zeichen und Grafiken, Tinten der Farben Schwarz, Cyan, Magenta und Yellow zu verwenden. Den Tintenkanälen 8 sind jeweils individuell ansteuerbare Antriebselemente 9, vorzugsweise piezoelektrische Wandler zugeordnet. Sie enden am vorderen, dem Aufzeichnungsträger 2 zugewandten Ende des Schreibkopfes 1 an einer Düsenplatte 14, aus deren Austrittsöffnungen entsprechend der Ansteuerung einzelne Tintentröpfchen mit relativ hoher Geschwindig­keit ausgestoßen und gegen den Aufzeichnungsträger 2 gespritzt werden.The invention is explained below with reference to an embodiment shown in the drawing. The exemplary embodiment shown shows a write head 1 of an ink writing device known per se, in front of which a recording medium 2 is located. The print head 1 essentially consists of an ink supply system 3, which is connected on the one hand to the ink channels 8 running inside the print head 1 and on the other hand to different ink containers 10, 11, 12, 13 which contain ink of different colors. It is known to use black, cyan, magenta and yellow inks to represent multicolored characters and graphics. The ink channels 8 are each assigned individually controllable drive elements 9, preferably piezoelectric transducers. They end at the front end of the write head 1 facing the recording medium 2 on a nozzle plate 14 the outlet openings of which, according to the control, eject individual ink droplets at a relatively high speed and spray them against the recording medium 2.

Erfindungsgemäß sind die Austrittsöffnungen des Schreib­kopfes 1 derart angeordnet, daß eine erste vertikale Reihe von n-Austrittsöffnungen, im Beispiel die n = 9 Austrittsöffnungen 40 bis 49 für den Ausstoß von Tin­tentröpfchen schwarzer Farbe vorgesehen ist. Diese werden im folgenden als Schwarzdüsen bezeichnet. Jeweils m-Austrittsöffnungen im Beispiel die m = 5 Austrittsöff­nungen 50 bis 54, 60 bis 64 bis und 70 bis 74 sind zum Ausstoß von Tintentröpfchen jeweils unterschiedlicher Farbe vorgesehen. Diese werden im folgenden als Farbdüsen bezeichnet. Es handelt sich dabei jeweils um die Grund­farben im sogenannten subtraktiven Farbmischsystem, im Beispiel um die Farben Cyan, Magenta und Yellow. Sämt­liche Austrittsöffnungen 40 bis 49, 50 bis 54, 60 bis 64 und 70 bis 74 sind jeweils in vertikaler Richtung im Abstand a angeordnet, wobei a durch das für die Zeichen­darstellung vorgesehene Raster bestimmt und derart ge­wählt ist, daß die im Raster aufgetragenen einzelnen Tintenpunkte der Darstellung in der sogenannten Ent­wurfsqualität entspricht. Zumindest die Anzahl n der Schwarzdüsen ist dabei so gewählt, daß durch sie die durch das Zeichenraster vorgesehene Höhe einer Schreib­zeile abgedeckt wird. Damit wird erreicht, daß eine Darstellung in der Entwurfsqualität in einem einzigen Durchgang stattfinden kann. Die jeweils m-Austritts­öfnungen für die Farbdüsen, können in ihrer Anzahl ge­ringer sein (m n). Sie sind jedoch in horizontaler Richtung in der gleichen Höhe angeordnet, wie die Schwarzdüsen. Dies ermöglicht es, daß im Vielfarbendruck die Druckpunkte der Farbe Schwarz nicht mehr durch die Mischung der drei Grundfarben gebildet wird, sondern vielmehr durch Tintentröpfchen der Farbe Schwarz entstehen.According to the invention, the outlet openings of the write head 1 are arranged such that a first vertical row of n outlet openings, in the example the n = 9 outlet openings 40 to 49, is provided for the ejection of ink droplets of black color. These are referred to below as black nozzles. Each of the m outlet openings in the example, the m = 5 outlet openings 50 to 54, 60 to 64 to and 70 to 74, are provided for ejecting ink droplets of different colors. These are referred to below as paint nozzles. These are the basic colors in the so-called subtractive color mixing system, in the example the colors cyan, magenta and yellow. All outlet openings 40 to 49, 50 to 54, 60 to 64 and 70 to 74 are each arranged in the vertical direction at a distance a, where a is determined by the grid provided for the character display and is selected such that the individual ink dots plotted in the grid Representation in the so-called design quality corresponds. At least the number n of black nozzles is selected so that it covers the height of a writing line provided by the character grid. This ensures that a design-quality representation can take place in a single pass. The number of m outlet openings for the paint nozzles can be smaller (mn). However, they are arranged at the same height in the horizontal direction as the black nozzles. This enables the printing dots of the color black to no longer be formed by mixing the three basic colors in multi-color printing, but instead rather they are created by black ink droplets.

Der Aufbau eines Zeichens in der Entwurfsqualität (DQ) und in der Schönschriftqualität (NLQ) wird im folgenden unter Hinweis auf die Fig. 2 und 3 erläutert.The structure of a character in the design quality (DQ) and in the fine writing quality (NLQ) is explained below with reference to FIGS. 2 and 3.

Gemäß Fig. 2 ist für die Darstellung von Text in der Entwurfsqualität ein 9 × 9 Zeichenraster festgelegt. Der Übersichtlichkeit wegen sind hier lediglich die Aus­trittsöffnungen 40 bis 49 der Düsen des Schreibkopfes 1, der sich hinter dem Aufzeichnungsträger 2 befindet, ge­strichelt eingetragen worden. Der Abstand a der Aus­trittsöffnung 40 bis 49 beträgt in diesem Beispiel a = 1/60 Zoll. Damit wird durch n = 10 Austrittsöffnun­gen die Standardhöhe von 1/6 Zoll abgedeckt. Während des Abdrucks von Zeichen bewegt sich der Schreibkopf 1 im Beispiel von links nach rechts mit gleich bleibender Geschwindigkeit. In hier nicht dargestellter Weise er­folgt über eine Druckersteuerung jeweils zu den Druck­zeitpunkten ein Tröpfchenausstoß aus ausgewählten Aus­trittsöffnungen. Die Druckzeitpunkte sind hier durch die Rasterspalten S1 bis S9 definiert. Auf diese Weise wird, wie in Fig. 2 dargestellt ist, daß Zeichen "A" in Entwurfsqualität aufgebaut. Die Zeichen einer Schreib­zeile werden während eines Durchlaufes gedruckt. Im Anschluß daran findet ein Transport des Aufzeichnungs­trägers 2 um eine Zeilenhöhe statt, so daß während des Rücklaufes des Schreibkopfes die nächste Schreibzeile in der gleichen Weise gedruckt werden kann.2, a 9 × 9 character grid is defined for the display of text in the design quality. For the sake of clarity, only the outlet openings 40 to 49 of the nozzles of the write head 1, which is located behind the recording medium 2, have been entered with dashed lines. The distance a of the outlet opening 40 to 49 is a = 1/60 inch in this example. This covers the standard height of 1/6 inch with n = 10 outlet openings. While characters are being imprinted, the write head 1 in the example moves from left to right at a constant speed. In a manner not shown here, droplet ejection from selected outlet openings takes place at each time of printing via a printer control. The printing times are defined here by grid columns S1 to S9. In this way, as shown in Fig. 2, character "A" is constructed in design quality. The characters of a writing line are printed during one pass. This is followed by a transport of the recording medium 2 by one line height, so that the next writing line can be printed in the same way while the rewinding of the writing head.

Der Abdruck farbiger Zeichen geschieht im Prinzip in der gleichen Weise, wobei der Aufzeichnungsträgers nach Beendigung eines Durchlaufs im dargestellen Ausführungs­beispiel, bei dem m =

Figure imgb0001
n ist, um eine halbe Zeilen­höhe weiter transportiert wird.In principle, colored characters are printed in the same way, with the recording medium after the end of a run in the exemplary embodiment shown, in which m =
Figure imgb0001
n is transported by half a line height.

Die Darstellung von Zeichen oder Grafiken in der hoch­wertigeren NLQ-Schriftqualität erfolgt im sogenannten Multipass-Betrieb.Man versteht darunter, daß zur Darstel­lung der Zeichen mehrere Durchläufe je Schreibzeile statt­finden, wobei einerseits die Relativbewegung zwischen Aufzeichnungsträger und Schreibkopf in Feinstufen statt­findet und andererseits der Drucktakt entsprechend einer Feinunterteilung des Rastertaktes abgegeben wird. Die erste Maßnahme wird durch eine Mikrozeilenschaltung realisiert. Die zweite Maßnahme wird dadurch erreicht, daß die Druckersteuerung in sogenannten Halbschritten Zeichen ergänzende Druckimpulse erzeugt. Fig. 3 zeigt, daß unter diesen Voraussetzungen die Darstellung eines Zeichens in einem 17 × 17 Raster erfolgt. Der Abdruck des Zeichens "A" geschieht dabei in der Weise, daß der ge­strichelt eingezeichnete Schreibkopf 1 zunächst in Richtung 15 bewegt wird, wobei die Druckersteuerung jeweils an allen horizontalen Druckstellen, nämlich an den durch einen Halbdruckschritt bestimmten Rasterspalten Druckimpulse abgibt. Auf diese Weise wird die horizonta­le Linie des Zeichens "A" durch eine entsprechend größere Anzahl von Druckpunkten gebildet. Nach Erreichen des Schreibzeilenendes löst die Druckersteuerung einen Vor­schub des Aufzeichnungsträgers 2 aus, der der Hälfte des Abstandes a der Austrittsöffnungen 40 bis 49 ent­spricht. Der Schreibkopf 1 nimmt nun, bezogen auf den Aufzeichnungsträger 2 die Stellung 16 ein. Bei Rücklauf des Schreibkopfes 1 in Richtung 17 werden somit die ver­tikalen und die schrägen Linien des Zeichens "A" aufge­füllt.The display of characters or graphics in the higher-quality NLQ font quality takes place in the so-called multipass mode, which means that there are several passes per write line for the display of the characters, whereby on the one hand the relative movement between the recording medium and the write head takes place in fine steps and on the other hand the print cycle accordingly a fine division of the grid clock is given. The first measure is implemented by a micro-line circuit. The second measure is achieved in that the printer controller generates additional pressure pulses in so-called half-steps. Fig. 3 shows that under these conditions, a character is displayed in a 17 × 17 grid. The imprint of the character "A" is done in such a way that the dashed head 1 is first moved in the direction 15, the printer controller emitting pressure pulses at all horizontal printing points, namely at the screen columns determined by a half-printing step. In this way, the horizontal line of the character "A" is formed by a correspondingly larger number of pressure points. After reaching the end of the writing line, the printer controller triggers an advance of the recording medium 2, which corresponds to half the distance a between the outlet openings 40 to 49. The write head 1 now occupies position 16 with respect to the record carrier 2. When the write head 1 returns in the direction 17, the vertical and the oblique lines of the character "A" are thus filled.

BezugszeichenlisteReference symbol list

  • 1 Schreibkopf1 print head
  • 2 Aufzeichnungsträger2 record carriers
  • 3 Tintenversorgungssystem3 ink supply system
  • 40 - 4n Austrittsöffnungen40 - 4n outlet openings
  • 50 - 5n Austrittsöffnungen50 - 5n outlet openings
  • 60 - 6n Austrittsöffnungen60 - 6n outlet openings
  • 70 - 7n Austrittsöffnungen70 - 7n outlet openings
  • 8 Tintenkanäle8 ink channels
  • 9 Antriebselemente9 drive elements
  • 10, 11, 12, 13 Tintenvorratsbehälter10, 11, 12, 13 ink reservoir
  • 14 Düsenplatte14 nozzle plate
  • a Rasterabstanda grid spacing
  • S1 - S9 RasterspaltenS1 - S9 grid columns

Claims (4)

1. Anordnung für die Austrittsöffnungen im Druckkopf einer Mehrfarben-Tintenschreibeinrichtung, in der die Austrittsöffnungen über Tintenkanäle mit Tintenbehältern verbunden sind, die Tinte schwarzer Farbe sowie Tinte mindestens weiterer drei Grundfarben enthalten, in der jedem Tintenkanal ein Piezowandler zugeordnet ist, durch dessen individuelle Ansteuerung Einzeltröpfchen aus den Austrittsöffnungen ausgestoßen werden, und in der der Druckkopf in Zeilenrichtung über einen Aufzeichnungs­träger beweglich ist,
dadurch gekennzeichnet, daß die zum Ausstoß von Tintentröpfchen schwarzer Farbe vorgesehen n Austrittsöffnungen (40 bis 4n) eine erste vertikale Reihe bilden, wobei deren Anzahl (n) und deren gegenseitiger Abstand (a) derart ist, daß auf dem Aufzeichnungsträger (2) Zeichen über die Höhe einer Schreibzeile in einer sogenannten Entwurfsschriftqualität (DQ) darstellbar sind,
daß die zum Ausstoß von Tintentröpfchen der anderen Grundfarben vorgesehenen m Austrittsöffnungen (50 bis 5m, 60 bis 6m, 70 bis 7m) in weiteren vertikalen Reihen angeordnete sind, wobei der gegenseitige Abstand der Austrittsöffnungen innerhalb einer Reihe dem Abstand (a) der ersten vertikalen Reihe entspricht,
und daß der Aufzeichnungsträger (2) in vertikaler Rich­tung nach der Aufzeichnung jeweils einer Schreibzeile wahlweise um mindestens eine halbe Schreibzeilenhöhe (Aufzeichnung in DQ) oder um einen Wert weiter transpor­tiert wird, der der Hälfte (a/2) des Abstandes (a) der Austrittsöffnungen der vertikalen Reihe entspricht (Auf­zeichnung in der sogenannten Schönschreibqualität NLQ).1. Arrangement for the outlet openings in the printhead of a multicolor ink writing device, in which the outlet openings are connected to ink containers via ink channels, contain the ink black color and ink at least three further basic colors, in which a piezo transducer is assigned to each ink channel, through the individual control of which individual droplets are assigned are ejected from the outlet openings and in which the print head can be moved in the line direction via a recording medium,
characterized in that the n outlet openings (40 to 4n) provided for ejecting black ink droplets form a first vertical row, the number (n) and the mutual distance (a) thereof being such that characters over the recording medium (2) the height of a writing line can be represented in a so-called draft font quality (DQ),
that the m outlet openings (50 to 5m, 60 to 6m, 70 to 7m) intended for ejecting ink droplets of the other primary colors are arranged in further vertical rows, the mutual spacing of the outlet openings within one row being equal to the distance (a) of the first vertical row corresponds to
and that the recording medium (2) is transported in the vertical direction after the recording of one writing line each by at least half a writing line height (recording in DQ) or by a value which is half (a / 2) of the distance (a) from the outlet openings corresponds to the vertical row (recording in the so-called Schönschreib quality NLQ). 2. Anordnung nach Anspruch 1,
dadurch gekennzeichnet, daß die Anzahl n der zum Ausstoß von Tintentröpfchen schwarzer Farbe vorgesehenen Austrittsöffnungen (40 bis 4n) größer ist als die Anzahl m der für jeweils eine weitere Grund­farbe vorgesehenen Austrittsöffnungen (50 bis 5n, 60 bis 6m, 70 bis 7m).2. Arrangement according to claim 1,
characterized in that the number n of the outlet openings (40 to 4n) provided for ejecting black ink droplets is greater than the number m of the outlet openings (50 to 5n, 60 to 6m, 70 to 7m) provided for a further primary color. 3. Anordnung nach Anspruch 2,
dadurch gekennzeichnet, daß die An­zahl n der zum Ausstoß von Tintentröpfchen schwarze Far­be vorgesehenen Austrittsöffnungen der doppelten Anzahl der für jeweils eine weitere Grundfarbe vorgesehenen m Austrittsöffnungen entspricht (n = 2 . m).3. Arrangement according to claim 2,
characterized in that the number n of the outlet openings provided for the ejection of ink droplets of black color corresponds to twice the number of m outlet openings provided for each further basic color (n = 2nd m). 4. Anordnung nach Anspruch 1,
dadurch gekennzeichnet, daß zur Darstellung von Zeichen in Schönschreibqualität (NLQ) der Druckkopf (1) eine Schreibzeile mehrmals überfährt (so­genannter Multipassbetrieb).4. Arrangement according to claim 1,
characterized in that the print head (1) passes over a writing line several times to display characters in fine writing quality (NLQ) (so-called multipass operation).
EP86111831A 1985-08-30 1986-08-27 Arrangement of outlet orifices of a print head in a multicolour ink printer Expired EP0216176B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3531097 1985-08-30
DE3531097 1985-08-30

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EP0216176A1 true EP0216176A1 (en) 1987-04-01
EP0216176B1 EP0216176B1 (en) 1988-11-17

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EP86111831A Expired EP0216176B1 (en) 1985-08-30 1986-08-27 Arrangement of outlet orifices of a print head in a multicolour ink printer

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US (1) US4728968A (en)
EP (1) EP0216176B1 (en)
JP (1) JPS6256151A (en)
DE (1) DE3661177D1 (en)

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Also Published As

Publication number Publication date
JPS6256151A (en) 1987-03-11
EP0216176B1 (en) 1988-11-17
DE3661177D1 (en) 1988-12-22
US4728968A (en) 1988-03-01

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