EP0149739B1 - Méthode et appareil pour l'alimentation en encre d'une imprimante à projection d'encre - Google Patents

Méthode et appareil pour l'alimentation en encre d'une imprimante à projection d'encre Download PDF

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Publication number
EP0149739B1
EP0149739B1 EP84113342A EP84113342A EP0149739B1 EP 0149739 B1 EP0149739 B1 EP 0149739B1 EP 84113342 A EP84113342 A EP 84113342A EP 84113342 A EP84113342 A EP 84113342A EP 0149739 B1 EP0149739 B1 EP 0149739B1
Authority
EP
European Patent Office
Prior art keywords
ink
drops
regulating
charge
speed
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
EP84113342A
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German (de)
English (en)
Other versions
EP0149739A2 (fr
EP0149739A3 (en
Inventor
Franz Dr. Kohler
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.)
Codi-Jet Markierungs Systeme GmbH
Original Assignee
Codi-Jet Markierungs Systeme 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 Codi-Jet Markierungs Systeme GmbH filed Critical Codi-Jet Markierungs Systeme GmbH
Priority to AT84113342T priority Critical patent/ATE36136T1/de
Publication of EP0149739A2 publication Critical patent/EP0149739A2/fr
Publication of EP0149739A3 publication Critical patent/EP0149739A3/de
Application granted granted Critical
Publication of EP0149739B1 publication Critical patent/EP0149739B1/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
    • B41J2/005—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
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/12—Ink jet characterised by jet control testing or correcting charge or deflection

Definitions

  • the invention relates to a method for monitoring and regulating the drop speed in the ink supply system of an inkjet printer and an arrangement according to the preamble of claim 3.
  • DE-C 24 11 822 describes a control arrangement for an inkjet printer which comprises a tachometer generator for determining the write head speed and a first and a second differentiation stage for differentiating corresponding signals. This arrangement is intended to achieve intermittent writing operation with good font quality from character to character.
  • the invention is described below with reference to the drawing.
  • 50 denotes an ink supply system for an ink jet printer.
  • the ink supply system 50 essentially comprises a spray body 1 with an associated nozzle element 2, a charge electrode 3, a charge detector 4, a deflection electrode 5, a drip catcher 6 and a reservoir 7 for the ink 7 '.
  • the ink 7 ' is supplied to the spray body 1 by means of a first pump 13 via a pipeline 9, 9', while the ink collected by the drip catcher 6 is returned to the reservoir 7 by means of a second pump 14 via a pipeline 8, 8 '.
  • Further components of the ink supply system 50 are a control unit 15, a clock generator 17, a first amplifier 18, a second amplifier 16 and a display device 19 which is provided for detecting the drop speed.
  • the clock generator 17 is connected on the one hand via a line 25 to the control unit 15 and on the other hand with the interposition of the first amplifier 18 via a line 26, 26 'with the spray body 1.
  • the charge electrode 3 is operatively connected to the control unit 15 via a first output line 27 and the charge detector 4 with the interposition of the second amplifier 16 via a supply line 28, 28 '.
  • the control unit 15 is operatively connected to the measuring device 19 via a third output line 29 and to the first pump 13 via a second output line 30.
  • the ink supply system 50 In a manner known per se, the ink is supplied to the spray body 1 from the reservoir 7 with the aid of the first pump 13 or a pressure source (not shown).
  • the spray body 1 which is provided with a built-in oscillating element (not shown in more detail), is actuated by the clock generator 17 via the line 26, 26 'and the amplifier 18 in such a way that an ink jet S generated and supplied to the assembly 10 formed from the charge electrode 3 and the charge detector 4.
  • the ink jet S is broken down into individual drops T in the region of the charge electrode 3 and provided with different charges as drops T 'to the charge detector 4 and then to the deflection electrode 5.
  • the drops T ' are checked and the result is fed as an influence signal 1 via the feed line 28 to the second amplifier 16 and via the feed line 28' as an influence signal 1 'for evaluation by the control unit 15.
  • the signal A evaluated and possibly corrected by the control unit 15 is in turn fed via the first output line 27 to the charge electrode 3, from which the drops T are provided with a correspondingly corrected charge.
  • the drops T 'supplied by the charge detector 4 to the deflecting electrode 5 are deflected electrostatically as drops T' equivalent to their charge when the deflecting electrode 5 flies through them, corresponding to the typeface, onto the respective web B and displaced by 90 ° for better illustration Feed system shown, recording medium 20 (writing film) sprayed.
  • the drops T "which are not required for the recording process and are therefore also not deflected, are collected by the catcher tube 6 and via the pipeline 8, 8 'fed back to the ink reservoir 7 by means of the second pump 14.
  • the drops T 'passing through the assembly 19 are detected by the charge detector and fed to the control unit 15 in accordance with the drop speed as the influence signal 1, I'.
  • the display device 19 which is operatively connected to the control unit 15, is supplied with a signal G for monitoring the drop speed.
  • Influence signal I, I 'applied to charge detector 4 can consequently be used, on the one hand, to monitor the drop speed and, on the other hand, coupled to signal A', which acts essentially on first pump 13 via second output line 30, for ink pressure control and regulation of the speed of ink drops T.
  • the speed of the ink jet S is checked and readjusted in the intermediate or write-free interval (PHASING).
  • PASING intermediate or write-free interval
  • a preferred control sequence takes place in such a way that a first number of drops T is weakly charged by the charge electrode 3 and a second number of drops T remain uncharged during the non-writing and recording interval, the first number being three successive drops T and the second number being five following drops T can be selected.
  • the respective charge of the first number of drops T (three drops T) is preferably chosen only so large that the deflection of the drops is just in the mouth area of the drip catcher 6.
  • a preferred alternating voltage signal which acts on the ink supply control sequence, is essentially achieved at the charge detector 4, which signal is rectified in the control unit 15 and fed to the control circuit as a control variable.

Landscapes

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

Claims (5)

1. Méthode pour contrôler et régler la vitesse des gouttes dans l'alimentation en encre d'une imprimante à projection d'encre, caractérisée en ce que:
«- pendant le temps intermédiaire («PHASING») sans écriture ou enregistrement, un premier nombre relativement petit de gouttes est faiblement chargé et un second nombre de gouttes approximativement deux fois plus grand reste non-chargé;
- un signal approximativement proportionnel à la vitesse de gouttes des premières gouttes faiblement chargées est capté et utilisé pour contrôler et régler la vitesse des gouttes.
2. Méthode pour contrôler et régler la vitesse des gouttes selon la revendication 1, caractérisée en ce que:
- le jet d'encre est divisé en trois gouttes successives formant le premier nombre faiblement chargé, et en cinq gouttes successives suivantes formant le second nombre non-chargé, et
- la charge des trois premières gouttes est juste assez grande pour que la déviation qui en résulte se situe encore dans la zone où débouche un séparateur de gouttes.
3. Appareil pour le système (50) d'alimentation en encre d'une imprimante à projection d'encre, comportant un corps de projection (1), une électrode de charge (3), un détecteur de charge (4), une électrode de déviation (5) ainsi qu'un séparateur de gouttes (6), et comportant également une unité de commande (15) pourvue d'une ligne d'amenée (28, 28') pour un signal d'influence (I) du détecteur de charge (4), et au moins une première ligne de sortie (27) pour des signaux (A) provenant de l'unité de commande (15):, en vue de régler la charge électrique sur l'électrode de charge (3), appareil caractérisé par:
- une seconde ligne (30) pour des signaux électriques (A'), fonction de la vitesse, du détecteur de charge (4), en vue de régler la pompe (13) et par suite la vitesse des gouttes d'encre (T) fournies par le corps de projection (1).
4. Appareil pour le système (50) d'alimentation en encre selon la revendication 3, caractérisé par:
- une troisième ligne de sortie (29) pour des signaux (G), fonction de la vitesse, provenant de l'unité de commande (15), en vue d'indiquer la vitesse des gouttes dans un dispositif indicateur (19).
5. Appareil pour le système (50) d'alimentation en encre selon la renvendication 3, caractérisé par un amplificateur (16) raccordé à la ligne d'amenée (28, 28') en vue de produire un signal d'influence (1') amplifié.
EP84113342A 1984-01-20 1984-11-06 Méthode et appareil pour l'alimentation en encre d'une imprimante à projection d'encre Expired EP0149739B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113342T ATE36136T1 (de) 1984-01-20 1984-11-06 Verfahren und anordnung fuer das tintenzufuehrsystem eines tintenstrahldruckers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH251/84 1984-01-20
CH25184 1984-01-20

Publications (3)

Publication Number Publication Date
EP0149739A2 EP0149739A2 (fr) 1985-07-31
EP0149739A3 EP0149739A3 (en) 1985-08-21
EP0149739B1 true EP0149739B1 (fr) 1988-08-03

Family

ID=4182744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113342A Expired EP0149739B1 (fr) 1984-01-20 1984-11-06 Méthode et appareil pour l'alimentation en encre d'une imprimante à projection d'encre

Country Status (4)

Country Link
US (1) US4612553A (fr)
EP (1) EP0149739B1 (fr)
AT (1) ATE36136T1 (fr)
DE (1) DE3473131D1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704675A (en) * 1986-12-22 1987-11-03 At&T Teletype Corporation Method for velocity adjustment of ink jet nozzles in a nozzle array
GB8708885D0 (en) * 1987-04-14 1987-05-20 Domino Printing Sciences Plc Ink jet printing
FR2636884B1 (fr) * 1988-09-29 1990-11-02 Imaje Sa Dispositif de controle et de regulation d'une encre et de son traitement dans une imprimante a jet d'encre continu
US5396274A (en) * 1992-05-20 1995-03-07 Videojet Systems International, Inc. Variable frequency ink jet printer
GB9626708D0 (en) * 1996-12-23 1997-02-12 Domino Printing Sciences Plc Continuous ink jet print head control
US6224180B1 (en) * 1997-02-21 2001-05-01 Gerald Pham-Van-Diep High speed jet soldering system
US5802420A (en) * 1997-05-12 1998-09-01 Lexmark International, Inc. Method and apparatus for predicting and displaying toner usage of a printer
US5797061A (en) * 1997-05-12 1998-08-18 Lexmark International, Inc. Method and apparatus for measuring and displaying a toner tally for a printer
FR2777211B1 (fr) * 1998-04-10 2000-06-16 Toxot Science Et Applic Procede de projection d'un liquide electriquement conducteur et dispositif d'impression par jet d'encre continu utilisant ce procede
US6244694B1 (en) * 1999-08-03 2001-06-12 Hewlett-Packard Company Method and apparatus for dampening vibration in the ink in computer controlled printers
JP2003291373A (ja) * 2002-04-05 2003-10-14 Hitachi Printing Solutions Ltd インクジェット記録装置
US6629747B1 (en) * 2002-06-20 2003-10-07 Lexmark International, Inc. Method for determining ink drop velocity of carrier-mounted printhead
GB2554926A (en) * 2016-10-14 2018-04-18 Domino Uk Ltd Improvements in or relating to continuous printers
JP7154766B2 (ja) * 2018-01-15 2022-10-18 株式会社日立産機システム インクジェット記録装置
EP3741569A1 (fr) * 2019-05-24 2020-11-25 Paul Leibinger GmbH & Co. KG Nummerier- und Markierungssysteme Procédé de surveillance et / ou d'ajustement de la position du faisceaux dans une imprimante à jet d'encre continu et imprimante à jet d'encre continu permettant la mise en uvre d'un tel procédé

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761941A (en) * 1972-10-13 1973-09-25 Mead Corp Phase control for a drop generating and charging system
US3769632A (en) * 1972-12-11 1973-10-30 Ibm Digital phase control for an ink jet recording system
US3836912A (en) * 1972-12-11 1974-09-17 Ibm Drop charge sensing apparatus for an ink jet printing system
JPS5421093B2 (fr) * 1973-03-12 1979-07-27
US3852768A (en) * 1973-08-17 1974-12-03 Ibm Charge detection for ink jet printers
JPS5237432A (en) * 1975-09-19 1977-03-23 Hitachi Ltd Phase matching device for ink jet recording device
US4063252A (en) * 1976-11-11 1977-12-13 International Business Machines Corporation Method and apparatus for controlling the velocity of ink drops in an ink jet printer
US4217594A (en) * 1977-10-17 1980-08-12 International Business Machines Corporation Method and apparatus for determining the velocity of a liquid stream of droplets
US4310846A (en) * 1978-12-28 1982-01-12 Ricoh Company, Ltd. Deflection compensated ink ejection printing apparatus
US4395717A (en) * 1980-03-07 1983-07-26 Ricoh Company, Ltd. Ink jet recording apparatus
US4435720A (en) * 1981-05-21 1984-03-06 Ricoh Company, Ltd. Deflection control type ink jet printing apparatus

Also Published As

Publication number Publication date
EP0149739A2 (fr) 1985-07-31
US4612553A (en) 1986-09-16
DE3473131D1 (en) 1988-09-08
ATE36136T1 (de) 1988-08-15
EP0149739A3 (en) 1985-08-21

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