EP0159402B1 - Dispositif d'enregistrement par encre pour obtenir des caractères de qualité variable - Google Patents

Dispositif d'enregistrement par encre pour obtenir des caractères de qualité variable Download PDF

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Publication number
EP0159402B1
EP0159402B1 EP84115424A EP84115424A EP0159402B1 EP 0159402 B1 EP0159402 B1 EP 0159402B1 EP 84115424 A EP84115424 A EP 84115424A EP 84115424 A EP84115424 A EP 84115424A EP 0159402 B1 EP0159402 B1 EP 0159402B1
Authority
EP
European Patent Office
Prior art keywords
ink
recording medium
quality
characters
print head
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
Application number
EP84115424A
Other languages
German (de)
English (en)
Other versions
EP0159402A1 (fr
Inventor
Artur Dipl.-Ing. Milbrandt
Rüdiger Ing. Hillmann
Hubertus Ing. Reinfeld
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0159402A1 publication Critical patent/EP0159402A1/fr
Application granted granted Critical
Publication of EP0159402B1 publication Critical patent/EP0159402B1/fr
Expired 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
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/5056—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements using dot arrays providing selective dot disposition modes, e.g. different dot densities for high speed and high-quality printing, array line selections for multi-pass printing, or dot shifts for character inclination
    • 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
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2121—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
    • B41J2/2128—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter by means of energy modulation

Definitions

  • the invention relates to an ink writing device for displaying characters and / or graphic patterns of different font quality according to the preamble of claim 1.
  • an ink writing device To display characters or graphic patterns with an ink writing device, it is known to spray individual ink droplets from one or more nozzles of an ink print head against a recording medium.
  • an ink writing device such as. B. in Siemens magazine 51, 1977, pages 219 to 221
  • the droplet is ejected in such a way that the drive elements assigned to the individual nozzles of the ink print head, hereinafter called transducers, are individually, i.e. depending on whether droplet ejection should take place or not controlled by a control circuit.
  • transducers the drive elements assigned to the individual nozzles of the ink print head
  • any desired character can be represented on the record carrier in this way by a grid-like arrangement of ink dots.
  • the characters or patterns shown are therefore always in a grid, the column and line spacing of which is determined by the movement of the write head in relation to the record carrier and by the spray frequency of the ink print head.
  • Each ejected ink droplet is the same size, i.e. the ink volume of each ejected ink droplet is constant. This means that the diameters of the ink dots applied to the recording medium also have a constant diameter.
  • the signals for controlling the piezo transducers are formed in a control circuit as a function of the information about the character to be displayed, which information is taken from a character generator, wherein the grid in which the character is represented in a dot form is also taken into account.
  • an improvement in font quality over standard quality can be achieved by increasing the number of ink droplets ejected to represent a character within the matrix, which is tantamount to reducing the printing speed.
  • the individual points of the matrix are overwritten, so to speak, it being expedient to carry out a feed comprising, for example, half a column spacing.
  • the object of the invention is to provide a possibility for an ink writing device with which, even when displaying characters or patterns with different, different font qualities, there is always a largely closed line of characters or patterns without changing the geometry of the ink print head.
  • One of the main advantages of the invention is that the setting of the font quality for the characters to be displayed, in particular the setting for the display in a draft, a standard or in a fine writing quality can be carried out in a simple manner in the control circuit of the ink writing device, whereby by changing the droplet size, ie by varying the ink volume of the individual droplets, both a closed line and a sharp contour of the characters shown are guaranteed in each case.
  • FIG. 1 serves to explain the imprint of a character with different font quality according to the prior art, in which the ink droplets each have the same, constant diameter, i.e. have the same and constant volume.
  • This example is based on a matrix with five columns (x-direction) and seven rows (y-direction), which is often used to display characters with matrix printers.
  • the outlet openings of the nozzles of an ink print head which are usually arranged in a nozzle plate DP, are shown on the left in FIG. 1.
  • the seven outlet nozzles D1 to D7 arranged here as an example and arranged in a vertical row
  • an arrangement with two or more rows of nozzles, which are then expediently offset from one another could also be used.
  • the matrix dots are first printed with the standard writing quality as in the printing of the character, with the feed in the x direction being reduced by half at the same time. Then there is an offset in the y direction by half a line spacing with subsequent ejection of ink droplets for the individual columns.
  • the character formed in this way is shown under the reference symbol S3 in FIG. 1.
  • the representation of the sign in the draft font quality S1 has a clear dot structure, and in the representation of the sign in the fine writing quality S3 there is a tendency for the character to have blurred and blurred contours as a result of the ink dots lying one above the other.
  • Fig. 2 shows the representation of the character "L” taking into account the teaching of the invention.
  • the size of the ink droplets applied to the recording medium i.e. the volume of each individual ink droplet changes depending on the type of font quality selected.
  • the nozzle plate DP shown on the left in FIG. 3 with the seven outlet openings of the nozzles D1 to D7 corresponds to the nozzle plate shown in FIG. 1.
  • To represent the character "L” in draft font quality S1 ink droplets with a relatively large volume of ink are ejected, so that the diameter d1 of the ink dots applied to the recording medium is such that the individual ink dots, e.g. B. as shown in Fig. 2 touch.
  • the volume of ink ejected with each ink droplet is reduced compared to the design font quality S1.
  • the ink dots applied to the recording medium for this standard font quality have a diameter d2 which is smaller than the diameter d1. In this way, the character "L" provided with the reference symbol S2 is created.
  • the volume of ink that is ejected with each ink droplet is reduced again.
  • the ink dots applied to the recording medium then each have a diameter d3, which in turn is smaller than the diameter d2.
  • the character “ L ” provided with the reference symbol S3 in FIG. 3 is created.
  • the lines of the character shown form a closed form in all three font qualities, and that, in addition, the outer contours of the characters are sharper even when the ink dots overlap on the recording medium due to the reduction in the diameter of the individual ink droplets. Overall, the visual impression is significantly improved with each of the selected font qualities.
  • the ink writing device consists of the actual ink print head K, which is, for example, a plastic body which contains a plurality of ink channels which point in the direction of the recording medium P end at the nozzle plate DP.
  • a transducer (not shown here) is assigned to each ink channel and can be controlled in pulses by means of an electronic control ST. Depending on a drive pulse, the transducer is deformed, which leads to the ejection of a single droplet of ink.
  • the control pulses are formed in accordance with the signals which are emitted by a character generator ZG.
  • the control circuit ST also has the input signals S1, S2 and S3 available, which are output in accordance with the selected font quality.
  • the signals S1, S2 and S3 can be entered, for example, by means of manually operated switches.
  • the corresponding font quality is generated in the control circuit ST speaking matrix pattern and the activation of the converter is determined according to the selected matrix pattern.
  • the signals for the movement of the ink print head K and the recording medium P are also emitted via the control circuit ST.
  • two drive devices namely a first motor M1 for moving the ink print head K and a second motor M2 for moving the recording medium P.
  • the ink print head is moved line by line, that is to say horizontally, along the line over the recording medium P via the first motor M1.
  • the second motor M2 is used for the line-by-line transport of the record carrier P.
  • the motor M2 also takes over the transport of the record carrier offset by half a line spacing for the display of a character in plain text quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (1)

  1. Dispositif d'enregistrement à encre comportant une tête d'impression, dans lequel un élément transducteur est associé à chacun des canaux d'adduction de l'encre, dont les ouvertures sont dirigées vers le support d'enregistrement, l'élément transducteur réalisant l'éjection de l'encre sous la forme de gouttelettes, sous l'effet d'impulsions de commande formées dans un circuit de commande et conformément aux caractères ou modèles devant être représentés, et dans lequel il est prévu des dispositifs d'entraînement pour la tête d'impression et pour le support d'enregistrement afin de produire un déplacement relatif entre la tête d'impression et le support d'enregistrement, et dans lequel la matrice associée aux différents caractères ou modèles graphiques est modifiée pour la représentation des caractères ou modèles graphiques avec des qualités décrites différentes, et dans lequel, en fonction de signaux pour différentes qualités d'écriture, le volume des différentes gouttelettes d'encre projetées contre le support d'enregistrement peut être réglé conformément à la qualité d'écriture, grâce à une modification de l'amplitude ou de la durée des impulsions de commande, caractérisé par le fait que le réglage de la taille des gouttelettes pour une qualité différente d'écriture est telle que le volume d'une gouttelette et par conséquent le diamètre (d1, d2, d3) d'un point image sur le support d'enregistrement (P) sont maximum dans le cas du type de fonctionnement correspondant à une qualité de projet, et sont minimum dans le cas du type de fonctionnement correspondant à une écriture embellie, et que le diamètre (d1, d2, d3), réglable au moyen des signaux de commande (S1, S2, S3), des points d'encre déposés sur le support d'enregistrement (A) pour chaque qualité choisie d'écriture est tel que les points d'encre se touchent au moins dans la matrice (x, y), prédéterminée pour la qualité choisie d'écriture, sur le support d'enregistrement (P).
EP84115424A 1984-04-27 1984-12-14 Dispositif d'enregistrement par encre pour obtenir des caractères de qualité variable Expired EP0159402B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3415787 1984-04-27
DE3415787 1984-04-27

Publications (2)

Publication Number Publication Date
EP0159402A1 EP0159402A1 (fr) 1985-10-30
EP0159402B1 true EP0159402B1 (fr) 1989-03-01

Family

ID=6234546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115424A Expired EP0159402B1 (fr) 1984-04-27 1984-12-14 Dispositif d'enregistrement par encre pour obtenir des caractères de qualité variable

Country Status (3)

Country Link
EP (1) EP0159402B1 (fr)
JP (1) JPS60239249A (fr)
DE (1) DE3476860D1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803500A (en) * 1986-07-04 1989-02-07 Siemens Aktiengesellschaft Ink printer means comprising interchangeable ink heads
DE3706468A1 (de) * 1987-02-27 1988-09-08 Siemens Ag Zeichenspeicherverfahren und anordnung zur reduzierung der redundanz von zeichen fuer matrixdrucker mit multipassdruck
JPH0645244B2 (ja) * 1987-11-04 1994-06-15 シャープ株式会社 インクジェットプリンタの印字方法
JPH02198880A (ja) * 1989-01-27 1990-08-07 Hitachi Koki Co Ltd 印字密度可変ドットプリンタ
JP2746633B2 (ja) * 1989-02-08 1998-05-06 キヤノン株式会社 液体噴射記録装置
JPH02235759A (ja) * 1989-03-10 1990-09-18 Canon Inc インクジェット記録装置
DE4012355A1 (de) * 1989-04-28 1990-10-31 Siemens Ag Steuerverfahren fuer einen schreibkopf zum aufbringen von beschriftungen, insbesondere einen laserschreibkopf
DE4004543A1 (de) * 1990-02-14 1991-08-22 Siemens Ag Verfahren zum bedrucken von folien mittels tintenschreibeinrichtungen
EP0491961B1 (fr) * 1990-07-10 1995-12-20 Fujitsu Limited Tete d'impression
US6065830A (en) * 1992-09-18 2000-05-23 Canon Kabushiki Kaisha Recording apparatus for recording at different recording speeds
JPH1058714A (ja) * 1996-07-01 1998-03-03 Xerox Corp 記録媒体の上に画像を印刷する方法
US6359701B1 (en) 1997-11-17 2002-03-19 Canon Kabushiki Kaisha Multi-head printing with differing resolutions
DE10031030B4 (de) † 2000-06-26 2005-08-04 Bauer, Jörg R. Verfahren und Vorrichtung zum Herstellen flächiger Bauteile mit vorbestimmtem Oberflächenaussehen und flächiges Bauteil, insbesondere Frontplatte eines Küchenelements
US8851638B2 (en) * 2010-11-11 2014-10-07 Eastman Kodak Company Multiple resolution continuous ink jet system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5342823A (en) * 1976-09-30 1978-04-18 Sharp Corp Ink jet printer
JPS5413339A (en) * 1977-06-30 1979-01-31 Sharp Corp Ink jet printer
JPS54158232A (en) * 1978-06-05 1979-12-13 Oki Electric Ind Co Ltd Multi-nozzle ink jet printer of variable resolution
US4216480A (en) * 1978-11-13 1980-08-05 International Business Machines Corporation Multiple speed ink jet printer
JPS5574883A (en) * 1978-12-04 1980-06-05 Hitachi Ltd Inject printer
JPS55131882A (en) * 1979-04-02 1980-10-14 Canon Inc Electronic equipment
US4463359A (en) * 1979-04-02 1984-07-31 Canon Kabushiki Kaisha Droplet generating method and apparatus thereof
JPS55139270A (en) * 1979-04-19 1980-10-30 Mielke Klaus Ink injection type printer
JPS56126172A (en) * 1980-03-10 1981-10-02 Hitachi Ltd Liquid drop injector
DE3009333C2 (de) * 1980-03-11 1985-05-15 Siemens AG, 1000 Berlin und 8000 München Piezoelektrische Tintenspritzeinrichtung zum Darstellen von Halbtonbildern

Also Published As

Publication number Publication date
EP0159402A1 (fr) 1985-10-30
DE3476860D1 (en) 1989-04-06
JPS60239249A (ja) 1985-11-28

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