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Liquid droplets recording device

Info

Publication number
EP0092229A2
EP0092229A2 EP19830103774 EP83103774A EP0092229A2 EP 0092229 A2 EP0092229 A2 EP 0092229A2 EP 19830103774 EP19830103774 EP 19830103774 EP 83103774 A EP83103774 A EP 83103774A EP 0092229 A2 EP0092229 A2 EP 0092229A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
liquid
nozzle
writing
recording
surface
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.)
Withdrawn
Application number
EP19830103774
Other languages
German (de)
French (fr)
Other versions
EP0092229A3 (en )
Inventor
Kenth Dipl.-Ing. Nilsson
Jan Bolmgren
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1606Coating the nozzle area or the ink chamber

Abstract

In the recording device there is at least one nozzle for writing which is arranged in a holder. If required, writing liquid from the nozzle can be applied to a recording medium arranged in front of the outlet opening of said nozzle. In order to avoid undesired leakage of writing liquid from the nozzle and to prevent the outlet opening of the nozzles becoming blocked by a layer of liquid and paper dust, provision is made for the side (6) of the nozzle holder (10), facing the recording medium (3), to be provided with a coating (15), the surface tension of which is lower than the surface tension of the writing liquid. <IMAGE>

Description

  • [0001] [0001]
    Die Erfindung betrifft ein mit Flüssigkeitströpfchen arbeitendes Schreibgerät, wobei zum Schreiben mindestens eine in einem Träger angeordnete Düse vorhanden ist, aus der bei Bedarf Schreibflüssigkeit herausgestossen und auf einen vor der Austrittsöffnung der Düse angeordneten Aufzeichnungsträger aufgebracht wird. The invention relates to an operating with liquid droplets writing instrument, wherein for writing at least one arranged in a carrier nozzle is present, is pushed out when required writing fluid and applied to a arranged in front of the outlet opening of the nozzle recording medium.
  • [0002] [0002]
    Ein solches Schreibgerät ist durch die DE-OS 25 27 647 bekannt. Such a writing instrument is known from DE-OS 25 27 647th Bei Schreibgeräten dieser Art passiert es häufig, dass die dem Aufzeichnungsträger zugewandte Seite des Düsenträgers, insbesondere um die Düsen herum, durch Schreibflüssigkeit, die aus den Düsen heraussikkert, benetzt wird. In writing instruments of this type it often happens that the surface facing the recording medium side of the nozzle carrier, in particular around the nozzle, by writing fluid, the heraussikkert from the nozzles is wetted. Dies hat den Nachteil, dass Papierstaub vom Aufzeichnungspapier auf der Oberfläche des Düsenträgers haftet und zusammen mit der SchreibElüssigkeit einen Belag bildet, der die Schreibfunktion verschlechtert. This has the disadvantage that paper dust from the recording paper adheres on the surface of the nozzle support and forming a coating together with the SchreibElüssigkeit which deteriorates the write function. So kann z. Thus, can. B. der Belag einen Teil der Düsenmündung verstopfen, so dass die Richtung der herausgestossenen Tropfen beeinflusst wird. B. covering the plug a portion of the nozzle orifice, so that the direction of the pushed-out drops is influenced.
  • [0003] [0003]
    Um zu vermeiden, dass Schreibflüssigkeit aus den Düsen heraussickert, kann z. In order to avoid that the writing fluid oozing from the nozzles, such can. B. durch eine Saugvorrichtung in dem Schreibflüssigkeitssystem ein bestimmter Unterdruck erzeugt werden. B. be generated by a suction device in the writing fluid system, a certain negative pressure. Beim Ausschalten des Schreibgerätes lässt der UnterdrucK jedoch nach, so dass wieder Schreibflüssigkeit heraussickern kann. However, when you turn off the writing instrument of the negative pressure decreases, so that can ooze writing fluid again.
  • [0004] [0004]
    Eine weitere Möglichkeit, das Heraustropfen der Schreib-Lst 1 TT flüssigkeit aus den Düsen zu verhindern,ist, den Flüssigkeitsbehälter im Verhältnis zum D üsenträger niedriger anzubringen, so dass ein Unterdruck im Flüssigkeitssystem erhalten wird. A further possibility, the dripping of the write Lst to prevent 1 TT liquid from the nozzles is to mount the liquid container relative to D üsenträger lower, so that a negative pressure is obtained in the fluid system. Beim Ausschalten des Gerätes wird die im System vorhandene Schreibflüssigkeit in den Behälter zurückgesaugt. When you turn off the device, the existing system in writing fluid is sucked back into the container. Beim Einschalten des Gerätes ist eine gewisse Zeitverzögerung nicht zu vermeiden, da die Schreibflüssigkeit vom Behälter zu den Düsen transportiert werden muss, bevor geschrieben werden kann. When the device a certain time delay can not be avoided because the writing fluid from the container to be transported to the nozzles before it can be written.
  • [0005] [0005]
    Der Erfindung liegt die Aufgabe zugrunde, ein Schreibgerät der eingangs genannten Art zu schaffen, bei dem ein Heraussickern von Schreibflüssigkeit aus der Düse nicht erfolgt, so dass die dem Aufzeichnungsträger zugewandte Seite des. Düsenträgers trocken bleibt. The invention has for its object to provide a writing instrument of the aforementioned type, in which a seepage of writing fluid from the nozzle does not take place, so that the surface facing the recording medium side of the. Nozzle carrier remains dry.
  • [0006] [0006]
    Diese Aufgabe ist erfindungsgemäss dadurch gelöst, dass die dem Aufzeichnungsträger zugewandte Seite des Düsenträgers mit einer Schicht versehen ist, deren Oberflächenspannung niedriger als die Oberflächenspannung der Schreibflüssigkeit ist. This object is inventively achieved in that the surface facing the recording medium side of the nozzle support is provided with a layer whose surface tension is lower than the surface tension of the recording liquid. Die flüssigkeitsabstossende Schicht hält die Schreibflüssigkeit zurück, so dass sie nicht aus der Düse heraussickert. The flüssigkeitsabstossende layer restrains the recording liquid, so that they do not ooze out from the nozzle. Ferner bleibt kein Papierstaub am Träger haften, so dass nunmehr eine gut definierte Richtung der Tropfen und damit eine hohe Schreibqualität erreicht ist. Further, no paper dust on the support sticks, so that now a well-defined direction of the drops and thus a high writing quality is reached. Durch die erfindungsgemässe Schicht braucht auch kein Unterdruck im Flüssigkeitssystem erzeugt zu werden. The inventive layer also no negative pressure in the fluid system needs to be created.
  • [0007] [0007]
    In einer Weiterbildung der Erfindung wird vorgeschlagen, dass die Schicht im Bereich der Austrittsöffnung der Düsen abgeschrägt ist. In a development of the invention it is proposed that the layer is bevelled in the region of the outlet opening of the nozzle. Dadurch ist erreicht, dass die Düsen mit Schraibflüssigkeit gefüllt sind, was nicht der Fall ist, wenn die Schicht bis in die Düse gelegt wird. Thereby is achieved that the nozzles are filled with Schraibflüssigkeit, which is not the case when the layer is applied to the nozzle. Wenn die Düse nicht ganz mit Schreibflüssigkeit gefüllt ist, sinkt die Schreibqualität bzw. die Schrift kann ganz ausbleiben. When the nozzle is not completely filled with writing fluid, the writing quality and the font drops can completely fail.
  • [0008] [0008]
    Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. The invention is explained in more detail with reference to an illustrated in the drawings embodiment. Es zeigen: Show it:
    • Fig. 1 einen Schnitt durch einen erfindungsgemässen Düsenträger gemäss Schnittlinie II von Fig. 4, Fig. 1 shows a section through an inventive nozzle carrier according to section line II of Fig. 4,
    • Fig. 2 eine schematische Ansicht eines Schreibgerätes, Fig. 2 is a schematic view of a writing instrument,
    • Fig. 3 eine Seitenansicht eines als Biegeschwinger arbeitenden piezoelektrischen Wandlers, und Fig. 3 is a side view of a bending vibrator functioning as a piezoelectric transducer, and
    • Fig. 4 eine Draufsicht auf den Düsenträger nach Fig. 1 mit einer kammartig ausgebildeten piezoelektrischen Wandleranordnung. Fig. 4 is a plan view of the nozzle carrier according to Fig. 1 with a comb-like piezoelectric transducer assembly.
  • [0009] [0009]
    Aus Fig. 2 ist der äussere Prinzipaufbau eines bekannten Schreibgerätes ersichtlich. From Fig. 2, the outer principle structure of a known writing instrument is visible. Über die Transportrollen 1 und 2 wird der Aufzeichnungsträger 3, z: B. normales Registrierpapier, in Richtung des Pfeiles 4 über einen Abstandhalter 5 an der Seite 6 des Gehäuses 7 vorbeigezogen. Via the transport rollers 1 and 2 of the record carrier 3, for: example, normal recording paper, passing pulled in the direction of the arrow 4 via a spacer 5 on the side 6 of the housing. 7 In das Gehäuse 7 ist die Anschlussleitung 8 geführt, die an ihrem freien Ende mit einem Stekker 9 zum Anschluss an ein nicht dargestelltes Steuergerät versehen ist, das die Steuersignale für die Aufzeichnung der gewünschten Verläufe, Zeichen oder Bilder liefert. In the housing 7, the connecting cable 8 is guided which is provided at its free end with a Stekker 9 for connection to an unillustrated control unit, which supplies the control signals for the recording of the desired patterns, characters or images.
  • [0010] [0010]
    In Fig. 3 ist dargestellt, wie die Seite 6 parallel zum Aufzeichnungsträger angebracht ist. In Fig. 3 is illustrated how the side 6 is attached parallel to the recording medium. Die Seite 6 ist die Seite eines Trägers 10, der eine Anzahl in einer Reihe nebeneinander angeordnete Düsen 11 aufweist. The page 6 is the side of a support 10 which comprises a number in a row next to each other arranged nozzles. 11 Ausser der Schreibflüssigkeit sind im Gehäuse 7 Stäbe oder Wandler 12 aus piezoelektrischem Material vorhanden, die derart kontaktiert und angeordnet sind, dass sie bei entsprechender elektrischer Ansteuerung Schreibflüssigkeit in Form eines Tröpfchens aus der Düse 11 spritzen. Besides the writing fluid 7 rods or transducer 12 of piezoelectric material are provided in the housing, which are contacted and arranged such that they inject writing fluid with appropriate electrical control in the form of a droplet from the nozzle. 11
  • [0011] [0011]
    In Fig. 4 ist dargestellt, dass die Wandler 12, die als Zähne eines Kammes ausgebildet sind, als Biegeschwinger arbeiten. In FIG. 4 is shown that the converter 12, which are formed as teeth of a comb, to work as flexural resonator. Dabei ist der aus dem Wandler 12 und dem Kammrücken 13 bestehende Piezokamm parallel zur Ebene des Trägers 10 angeordnet. Here, the existing of the transducer 12 and the comb back 13 piezo comb is disposed parallel to the plane of the support 10th Der freie Endbereich der einzelnen Wandler 12 befindet sich vor den einzelnen Düsen 11 der Düsenreihe. The free end portion of each transducer 12 is in front of the individual nozzles 11 of the nozzle row. Der Kammrücken 13 ist mit einem Befestigungsschraubsatz 14 auf dem die Düsenreihe aufnehmenden Träger 10 angeschraubt. The comb back 13 is screwed with a Befestigungsschraubsatz 14 on which the nozzle row receiving carrier 10th Bei Anlegen von elektrischer Spannung an die Kontaktierungen eines Wandlers 12 bewegt sich dieser in die in Fig. 3 gestrichelt dargestellte Position. Upon application of electrical voltage to the contacts of a transducer 12 moves this in the dashed lines in FIG. 3 position shown. Bei einer Unterbrechung der angelegten Spannung schnellt er zurück in die nicht gebogene, mit durchgezogenen Linien gezeichnete Stellung und drückt dabei ein Tröpfchen Schreibflüssigkeit durch die Düse 11. In case of interruption of the applied voltage it snaps back in the not bent, shown in solid line position and presses a droplet of recording liquid through the nozzle. 11
  • [0012] [0012]
    In Fig. 1 ist dargestellt, dass die Seite 6 mit einer Schicht 15 versehen ist, deren Oberflächenspannung niedriger als die Oberflächenspannung der Schreibflüssigkeit ist. In Fig. 1 it is shown that the side is provided with a layer 15 6, whose surface tension is lower than the surface tension of the recording liquid. Materiale dieser Art sind z. Materials of this kind are for. 3. Polyäthylen oder Polytetraflouräthylen. 3. polyethylene or polytetrafluorethylene. Die Schicht weist eine Stärke von 0,1 um. The layer has a thickness of 0.1. bis 10 µm vorzugsweise 1 um auf. to 10 .mu.m, preferably 1 .mu.m. Die Schicht ist im Bereich 6 der Austrittsöffnung der Düsen 11 abgeschrägt, damit die Düsen 11 ganz mit Schreibflüssigkeit gefüllt werden. The layer is bevelled in the region 6 of the outlet opening of the nozzle 11 so that the nozzles 11 are completely filled with writing fluid.
  • [0013] [0013]
    Wegen der niedrigeren Oberflächenspannung der Schicht 15 sickert keine Schreibflüssigkeit durch die Düsen 11, wodurch die Seite 6 trocken bleibt. Because of lower surface tension of the layer 15 no writing fluid seeps through the nozzle 11, whereby the side 6 remains dry.

Claims (6)

1. Mit Flüssigkeitströpfchen arbeitendes Schreibgerät, bei dem zum Schreiben mindestens eine in einem Träger angeordnete Düse vorhanden ist, aus der bei Bedarf Schreibflüssigkeit herausgestossen und auf einen vor der Austrittsöffnung der Düse angeordneten Aufzeichnungsträger aufgebracht wird, dadurch gekennzeichnet, dass die dem Aufzeichnungsträger (3) zugewandte Seite (6) des Düsenträgers (10) mit einer Schicht (15) versehen ist, deren Oberflächenspannung niedriger als die Oberflächenspannung der Schreibflüssigkeit ist. 1 operates with liquid droplets writing instrument in which at least one is arranged in a carrier nozzle is for writing any, is from the, if necessary pushed out writing fluid and applied to a arranged in front of the outlet opening of the nozzle recording medium, characterized in that the recording medium (3) -facing side (6) of the nozzle carrier (10) with a layer (15) is provided, whose surface tension is lower than the surface tension of the recording liquid.
2. Schreibgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Schicht (15) aus Polyäthylen besteht. 2. A writing instrument according to claim 1, characterized in that the layer (15) consists of polyethylene.
3. Schreibgerät nach Anspruch 1. dadurch gekennzeichnet, dass die Schicht (15) aus Polytetrafluoräthylen besteht. 3. A writing instrument according to claim 1, characterized in that the layer (15) consists of polytetrafluoroethylene.
4. Schreibgerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet , dass die Schicht (15) eine Stärke von 0,1 µm bis 10 µm, vorzugsweise 1 µm aufweist. 4. A writing instrument according to any one of claims 1 to 3, characterized in that the layer (15) has a thickness of 0.1 .mu.m to 10 .mu.m, preferably 1 .mu.m.
5. Schreibgerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , dass die Schicht (15) im Bereich (15) der Austrittsöffnung der Düse bzw. Düsen abgeschrägt ist. 5. Writing implement according to one of claims 1 to 4, characterized in that the layer (15) is bevelled in the region (15) of the outlet opening of the nozzle or nozzles.
6. Verwendung eines mit FLUssigKeitströpfchen arbeitenden Schreibgerätes nach einem der Ansprüche 1 bis 5 zur punktweisen Aufzeichnung analoger Verläufe oder alphanumerischer Zeichen sowie von Bildern, wobei zum Schreiben der einzelnen Punkte reihenweise in einem gemeinsamen Träger angeordnete Düsen vorhanden sind, vor deren Eintrittsöffnungen derart kontaktierte piezoelektrische Wandler angeordnet sind, dass bei elektrischen Spannungsänderungen an der Kontaktierung Schreibflüssigkeit aus der Düse herausgestossen und auf einen vor der Austrittsöffnung der Düsen angeordneten Aufzeichnungsträger aufgebracht wird. 6. Using one with FLUssigKeitströpfchen working writing instrument according to any one of claims 1 to 5 for point by point recording of analogue curves or alphanumerical characters and of images, for writing of the individual dots in rows arranged in a common carrier nozzles are present, prior to their entry openings so contacted piezoelectric transducers are arranged such that when pushed out electrical voltage changes at the contact writing fluid from the nozzle and is applied to a arranged in front of the outlet opening of the nozzles record carrier.
EP19830103774 1982-04-21 1983-04-19 Liquid droplets recording device Withdrawn EP0092229A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19823214791 DE3214791A1 (en) 1982-04-21 1982-04-21 With fluessigkeitstroepfchen working schreibgeraet
DE3214791 1982-04-21

Publications (2)

Publication Number Publication Date
EP0092229A2 true true EP0092229A2 (en) 1983-10-26
EP0092229A3 true EP0092229A3 (en) 1985-04-10

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Family Applications (1)

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EP19830103774 Withdrawn EP0092229A3 (en) 1982-04-21 1983-04-19 Liquid droplets recording device

Country Status (3)

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JP (1) JPS58191171A (en)
DE (1) DE3214791A1 (en)
EP (1) EP0092229A3 (en)

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Also Published As

Publication number Publication date Type
EP0092229A3 (en) 1985-04-10 application
JPS58191171A (en) 1983-11-08 application
DE3214791A1 (en) 1983-10-27 application

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Designated state(s): DE FR GB IT

18D Deemed to be withdrawn

Effective date: 19851031

RIN1 Inventor (correction)

Inventor name: BOLMGREN, JAN

Inventor name: NILSSON, KENTH, DIPL.-ING.