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DE4100729A1 - METHOD FOR LIQUID JET PRINTING SYSTEMS - Google Patents

METHOD FOR LIQUID JET PRINTING SYSTEMS

Info

Publication number
DE4100729A1
DE4100729A1 DE4100729A DE4100729A DE4100729A1 DE 4100729 A1 DE4100729 A1 DE 4100729A1 DE 4100729 A DE4100729 A DE 4100729A DE 4100729 A DE4100729 A DE 4100729A DE 4100729 A1 DE4100729 A1 DE 4100729A1
Authority
DE
Germany
Prior art keywords
drops
nozzles
recording medium
gas jet
nozzle
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.)
Ceased
Application number
DE4100729A
Other languages
German (de)
Inventor
Klaus Dietrich
Stephan Guenther
Norbert Knoth
Friedrich-Viktor Miehe
Wolfgang Dr Thiel
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
Priority to DE4100729A priority Critical patent/DE4100729A1/en
Priority to HU913762A priority patent/HUT60192A/en
Priority to KR1019910022553A priority patent/KR920014621A/en
Priority to EP91121127A priority patent/EP0494385A1/en
Priority to PL29274391A priority patent/PL292743A1/en
Priority to ZA9269A priority patent/ZA9269B/en
Priority to CS9247A priority patent/CS4792A3/en
Priority to CA002059006A priority patent/CA2059006A1/en
Publication of DE4100729A1 publication Critical patent/DE4100729A1/en
Ceased legal-status Critical Current

Links

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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/05—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers produced by the application of heat
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
    • B41J2002/031—Gas flow deflection

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

Die Erfindung betrifft ein Verfahren für Flüssigkeitsstrahl-Druck­ systeme, insbesondere für Frankier- und Wertstempel­ maschinen, bei dem durch Ausstoßen von Tropfen aus Düsen Schriftzeichen und grafische Darstellungen auf einem Aufzeichnungsträger erzeugt werden.The invention relates to a method for liquid jet printing systems, especially for franking and value stamps machines in which by ejecting drops from nozzles Characters and graphic representations in one Record carriers are generated.

Es ist bekannt (DE 23 43 420 B2, DE 25 20 702 C3, DE 25 48 885 A1, DE 26 19 103 A1) bei Flüssigkeitsstrahl- Drucksystemen die Flüssigkeitsdüsen vertikal gegenüber dem Aufzeichnungsträger anzuordnen. Vor den Düsenaustritts­ öffnungen sind Elektroden zum Aufladen von Flüssigkeits­ tropfen und zum Ablenken der Tropfen gesetzt. Ein kontinuierlicher Tropfenstrom in Abhängigkeit von der Austrittsgeschwindigkeit aus den Düsen und der Viskosität der Flüssigkeit, der sich begrenzt zur Erhöhung einer höheren Schreibgeschwindigkeit verändern läßt, ist dabei notwendig. Durch eine solche Frequenzerhöhung ergibt sich ein geringerer Ausstoßabstand der Tropfen untereinander. Dies kann zu Problemen der Aufladung der Tropfen führen.It is known (DE 23 43 420 B2, DE 25 20 702 C3, DE 25 48 885 A1, DE 26 19 103 A1) for liquid jet Pressure systems the liquid nozzles vertically opposite the Arrange record carrier. Before the nozzle exit Openings are electrodes for charging liquid drip and set to deflect the drops. A continuous drop flow depending on the Exit velocity from the nozzles and the viscosity of the Fluid that limits itself to increasing a higher one It is necessary to change the writing speed. Such a frequency increase results in a lower one Ejection distance between the drops. This can be too Problems with the charging of the drops.

Der Erfindung lag die Aufgabe zugrunde, ein Verfahren zu schaffen, das unabhängig von Ladungsproblemen eine sichere Ablenkung der Tropfen eines Flüssigkeitsstrahl-Drucksystems bei hoher Tropfenfolge gewährleistet.The invention was based on the object of a method create a safe regardless of cargo problems Deflection of drops in a liquid jet printing system guaranteed with a high drop sequence.

Diese Aufgabe wurde durch die Erfindung gelöst, wie sie im Kennzeichnungsteil des ersten Patentanspruches dargelegt ist. Die Unteransprüche beschreiben weitere vorteilhafte Lösungen.This object was achieved by the invention, as in Labeling part of the first claim is set out. The sub-claims describe further advantageous solutions.

Der Vorteil der Erfindung besteht in der Nutzung eines gesteuerten Gasstrahls zur Ablenkung der Tropfen. Dadurch entfallen sämtliche Probleme der Aufladung der Tropfen in einem elektrischen Feld und die damit zusammenhängende gleichmäßige Beimischung hauptsächlich magnetischer Bestandteile zur Schreibflüssigkeit.The advantage of the invention is the use of a controlled gas jet to deflect the drops. Thereby  eliminates all problems of charging the drops in an electric field and the related uniform admixture mainly magnetic Components for the writing fluid.

Anhand einer Prinzipskizze wird die Erfindung nachfolgend näher erläutert. Die Skizze zeigt das Schema für die Ablenkung von Tropfen einer Düse. Mehrere solcher Systeme können miteinander kombiniert werden.The invention is described below on the basis of a schematic diagram explained in more detail. The sketch shows the scheme for the Deflection of drops from a nozzle. Several such systems can be combined.

Gegenüber den bekannten Flüssigkeitsstrahl-Drucksystemen sind die Düsen 1 horizontal zum Aufzeichnungsträger 3 angeordnet. Die austretenden Tropfen 4 enthalten in ihrer Flugbahn somit eine horizontale Bewegungskomponente.Compared to the known liquid jet printing systems, the nozzles 1 are arranged horizontally to the recording medium 3 . The emerging drops 4 thus contain a horizontal movement component in their trajectory.

Die Tropfen 4 werden beispielsweise kontinuierlich mit konstanter Frequenz aus der Düse 1 ausgeworfen. Dazu kann bekannterweise die Düse über einen piezoelektrischen Wandler in Schwingung versetzt werden, um die Tropfen mit konstanter Frequenz ausstoßen zu können.The drops 4 are, for example, continuously ejected from the nozzle 1 at a constant frequency. For this purpose, as is known, the nozzle can be set in vibration by means of a piezoelectric transducer in order to be able to eject the droplets at a constant frequency.

Vertikal zum Aufzeichnungsträger 3 und zur Düse 1 ist eine Gasdüse 2 angeordnet, aus der ein senkrecht zum Auf­ zeichnungsträger 3 gerichteter Gasstrahl austritt. Dieser Gasstrahl unterliegt einer Steuerung und bewirkt dem­ entsprechend eine Ablenkung der einzelnen Tropfen 4 in Richtung des Aufzeichnungsträgers 3.A gas nozzle 2 is arranged vertically to the recording medium 3 and to the nozzle 1 , from which a gas jet directed perpendicular to the recording medium 3 emerges. This gas jet is subject to a control and accordingly causes the individual drops 4 to be deflected in the direction of the recording medium 3 .

Die steuerbare Geschwindigkeit des Gasstrahles bewirkt eine unterschiedlich geneigte Flugbahn der Tropfen 4. Damit sind die Tropfen 4 an verschiedenen Stellen des Aufzeichnungs­ trägers 3 positionierbar. The controllable speed of the gas jet causes a differently inclined trajectory of the drops 4 . So that the drops 4 can be positioned at different locations on the recording medium 3 .

Eine weitere Lösung zur Positionierung der Tropfen 4 auf dem Aufzeichnungsträger 3 ist die Umkehrung des vorgenannten Prinzips: Bei einem konstanten Gasstrahl aus der Gasdüse 2 wird die Ausstoßgeschwindigkeit der Tropfen 4 variiert. Letzteres kann in bekannter Weise über Magnetspulen betätigte Miniaturpumpen realisiert werden. Der Austritt der Tropfen 4 aus der Düse 1 kann dabei durch die Injektor-Wirkung des an der Düsenöffnung vorbeigeleiteten Gasstrahles der Gasdüse 2 ausgelöst werden.A further solution for positioning the drops 4 on the recording medium 3 is the reversal of the aforementioned principle: with a constant gas jet from the gas nozzle 2 , the ejection speed of the drops 4 is varied. The latter can be implemented in a known manner via miniature pumps actuated by magnetic coils. The exit of the drops 4 from the nozzle 1 can be triggered by the injector effect of the gas jet of the gas nozzle 2 which is directed past the nozzle opening.

Die vektorielle Addition der Bewegungskomponenten des Gasstrahles und der Tropfen 4 führt zu den Flugbahn­ änderungen, wobei jeweils eine Austrittsgeschwindigkeit, entweder die der Tropfen 4 oder die des Gasstrahles, gesteuert wird.The vectorial addition of the motion components of the gas jet and the droplets 4 leads to changes in the trajectory, an exit speed, either that of the droplets 4 or that of the gas jet, being controlled in each case.

Als Gas dient im einfachsten Fall Luft. Spezielle Gas­ mischungen, abgestimmt auf die Konsistenz der Schreib­ flüssigkeit, können zur Erhöhung der Druckgeschwindigkeit des Systems beitragen. Außerdem ist es für werbetechnische Zwecke möglich, Duftstoffe der Flüssigkeit und/oder dem Gas beizumengen.In the simplest case, air is used as the gas. Special gas blends matched to the consistency of the writing liquid, can increase the printing speed of the Systems contribute. It is also for advertising purposes possible fragrances of the liquid and / or the gas to add.

In bekannter Weise ist der Düse 1 gegenüberliegend eine Auffangeinrichtung 5 für nicht abgelenkte Tropfen 4 vorgesehen. Über entsprechende Einrichtungen wird die darin gesammelte Flüssigkeit dem Vorratsbehälter wieder zugeführt.In a known manner, a collecting device 5 for undeflected drops 4 is provided opposite the nozzle 1 . The liquid collected therein is fed back into the storage container via appropriate devices.

Claims (4)

1. Verfahren für Flüssigkeitsstrahl-Drucksysteme,insbe­ sondere für Frankier- und Wertstempelmaschinen, bei dem durch Ausstoßen von Tropfen aus Düsen Schriftzeichen und grafische Darstellungen auf einem Aufzeichnungsträger erzeugt werden, gekennzeichnet durch gegenüber dem Aufzeichnungsträger (3) horizontal angeord­ nete Düsen (1) zum Ausstoßen von Tropfen (4) und vertikal zu den Düsen (1) und dem Aufzeichnungsträger (3) angeord­ nete Gasdüsen (2) zum Ausstoßen eines Gasstrahles, der dem Umlenken der aus den Düsen (1) austretenden Tropfen (4) in Richtung des Aufzeichnungsträgers dient.1. A method for liquid jet printing systems, in particular for franking and stamping machines, in which characters and graphic representations are generated on a recording medium by ejecting drops from nozzles, characterized by nozzles ( 1 ) arranged horizontally relative to the recording medium ( 3 ) Ejecting drops ( 4 ) and vertically to the nozzles ( 1 ) and the recording medium ( 3 ) arranged gas nozzles ( 2 ) for ejecting a gas jet which deflects the drops ( 4 ) emerging from the nozzles ( 1 ) in the direction of the recording medium serves. 2. Verfahren nach Anspruch 1, gekennzeichnet durch einen kontinuierlichen Ausstoß von Tropfen (4) aus den Düsen (1) mit konstanter Frequenz und einer binären Steuerung des Gasstrahles mit steuerbaren Austrittsgeschwindigkeiten.2. The method according to claim 1, characterized by a continuous ejection of drops ( 4 ) from the nozzles ( 1 ) at a constant frequency and a binary control of the gas jet with controllable outlet speeds. 3. Verfahren nach Anspruch 1, gekennzeichnet durch einen kontinuierlichen Gasstrahl und einen in seiner Frequenz und seiner Geschwindigkeit variierbaren Tropfenausstoß der Düse (1).3. The method according to claim 1, characterized by a continuous gas jet and a droplet discharge of the nozzle ( 1 ) which is variable in its frequency and its speed. 4. Verfahren nach Anspruch 1 bis 3, gekennzeichnet durch Nutzung der Injektorwirkung des Gasstrahles zum Auslösen des Tropfenaustrittes aus der Düse (1).4. The method according to claim 1 to 3, characterized by using the injector effect of the gas jet to trigger the drop exit from the nozzle ( 1 ).
DE4100729A 1991-01-09 1991-01-09 METHOD FOR LIQUID JET PRINTING SYSTEMS Ceased DE4100729A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE4100729A DE4100729A1 (en) 1991-01-09 1991-01-09 METHOD FOR LIQUID JET PRINTING SYSTEMS
HU913762A HUT60192A (en) 1991-01-09 1991-12-02 Method for operating jet printing systems
KR1019910022553A KR920014621A (en) 1991-01-09 1991-12-10 How to Print a Liquid Spray Printing System
EP91121127A EP0494385A1 (en) 1991-01-09 1991-12-10 Liquid jet printing method
PL29274391A PL292743A1 (en) 1991-01-09 1991-12-12 Method of and apparatus for ink-jet printing
ZA9269A ZA9269B (en) 1991-01-09 1992-01-06 Process for liquid jet printing systems
CS9247A CS4792A3 (en) 1991-01-09 1992-01-08 Arrangement of nozzles for printing systems with ink jet
CA002059006A CA2059006A1 (en) 1991-01-09 1992-01-08 Process for a liquid-jet printing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4100729A DE4100729A1 (en) 1991-01-09 1991-01-09 METHOD FOR LIQUID JET PRINTING SYSTEMS

Publications (1)

Publication Number Publication Date
DE4100729A1 true DE4100729A1 (en) 1992-07-16

Family

ID=6422888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4100729A Ceased DE4100729A1 (en) 1991-01-09 1991-01-09 METHOD FOR LIQUID JET PRINTING SYSTEMS

Country Status (8)

Country Link
EP (1) EP0494385A1 (en)
KR (1) KR920014621A (en)
CA (1) CA2059006A1 (en)
CS (1) CS4792A3 (en)
DE (1) DE4100729A1 (en)
HU (1) HUT60192A (en)
PL (1) PL292743A1 (en)
ZA (1) ZA9269B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6554410B2 (en) * 2000-12-28 2003-04-29 Eastman Kodak Company Printhead having gas flow ink droplet separation and method of diverging ink droplets
US6508542B2 (en) 2000-12-28 2003-01-21 Eastman Kodak Company Ink drop deflection amplifier mechanism and method of increasing ink drop divergence
US6588888B2 (en) 2000-12-28 2003-07-08 Eastman Kodak Company Continuous ink-jet printing method and apparatus
US6863384B2 (en) * 2002-02-01 2005-03-08 Eastman Kodak Company Continuous ink jet method and apparatus
US6746108B1 (en) 2002-11-18 2004-06-08 Eastman Kodak Company Method and apparatus for printing ink droplets that strike print media substantially perpendicularly
US7413293B2 (en) 2006-05-04 2008-08-19 Eastman Kodak Company Deflected drop liquid pattern deposition apparatus and methods

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2617885A1 (en) * 1975-05-12 1976-11-25 Ibm INKJET PRINTER
DE2808200A1 (en) * 1977-03-01 1978-09-07 Int Standard Electric Corp INKJET PRINTER
DE2501035C2 (en) * 1974-01-16 1984-08-09 Pitney Bowes, Inc., Stamford, Conn. Postage stamp printing device for a franking machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE400841B (en) * 1976-02-05 1978-04-10 Hertz Carl H WAY TO CREATE A LIQUID RAY AND DEVICE FOR IMPLEMENTING THE SET
JPS56146773A (en) * 1980-04-16 1981-11-14 Mitsubishi Electric Corp Ink printing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2501035C2 (en) * 1974-01-16 1984-08-09 Pitney Bowes, Inc., Stamford, Conn. Postage stamp printing device for a franking machine
DE2617885A1 (en) * 1975-05-12 1976-11-25 Ibm INKJET PRINTER
DE2808200A1 (en) * 1977-03-01 1978-09-07 Int Standard Electric Corp INKJET PRINTER

Also Published As

Publication number Publication date
CA2059006A1 (en) 1992-07-10
CS4792A3 (en) 1992-08-12
KR920014621A (en) 1992-08-25
PL292743A1 (en) 1992-07-13
EP0494385A1 (en) 1992-07-15
ZA9269B (en) 1992-10-28
HU913762D0 (en) 1992-03-30
HUT60192A (en) 1992-08-28

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection