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EP0149216A2 - Writing device - Google Patents

Writing device Download PDF

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Publication number
EP0149216A2
EP0149216A2 EP84116112A EP84116112A EP0149216A2 EP 0149216 A2 EP0149216 A2 EP 0149216A2 EP 84116112 A EP84116112 A EP 84116112A EP 84116112 A EP84116112 A EP 84116112A EP 0149216 A2 EP0149216 A2 EP 0149216A2
Authority
EP
European Patent Office
Prior art keywords
writing
housing
storage tank
tank
needle
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.)
Granted
Application number
EP84116112A
Other languages
German (de)
French (fr)
Other versions
EP0149216A3 (en
EP0149216B1 (en
Inventor
Kurt Held
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT84116112T priority Critical patent/ATE34341T1/en
Publication of EP0149216A2 publication Critical patent/EP0149216A2/en
Publication of EP0149216A3 publication Critical patent/EP0149216A3/en
Application granted granted Critical
Publication of EP0149216B1 publication Critical patent/EP0149216B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/16—Pens with writing-points other than nibs or balls with tubular writing-points comprising a movable cleaning element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02—Ink reservoirs
    • B43K5/14—Exchangeable ink cartridges
    • B43K5/145—Exchangeable ink cartridges with valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/18—Arrangements for feeding the ink to the nibs
    • B43K5/1818—Mechanical feeding means, e.g. valves; Pumps
    • B43K5/1827—Valves
    • B43K5/1836—Valves automatically closing
    • B43K5/1845—Valves automatically closing opened by actuation of the writing point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/02—Ink reservoirs; Ink cartridges
    • B43K7/03—Ink reservoirs; Ink cartridges pressurised, e.g. by gas

Definitions

  • the invention relates to a writing device with a storage tank for ink or another writing fluid, and a housing open to the tank, with a writing tube arranged on the housing, with a needle axially displaceable in the writing tube and with a needle attached to the housing, displaceable inside the housing Drop weight.
  • Such writing devices are hand or machine-operated and are filled with pigment-containing, more or less viscous inks or the like. In such writing devices, it is required that at any writing speed so much writing fluid flows out reliably that the writing is uniformly opaque and clean, and that there are no thickened characters or interruptions in the flow of the ink.
  • a major disadvantage of these recorders lies in their expenditure on equipment: a piston is arranged in the storage tank between the propellant gas and the writing liquid, which tends to become stiff and thus frequently impairs sensitive pressure on the liquid. Rapid pressure changes and thus high writing speeds and string frequencies are often hampered by the compressibility of the gas. The necessary hose connections between the solenoid valve and the writing fluid storage tank make handling the device more difficult and only make it practical for machine-operated typists.
  • the object is achieved in that a propellant gas which is under its own vapor pressure and acts directly on the writing liquid is contained in the storage tank, and the front end of the writing tube lying inside the housing is designed as a valve seat on which a trained at the opposite end of the drop weight Valve body can be placed sealingly.
  • the writing device shown in the drawing consists of a storage tank 1, on one end of which the actual writing instrument in the form of a housing 2 is screwed by means of a threaded connection 3.
  • the tank 1, which is hermetically sealed on all sides, contains a supply of ink or another writing pen liquid 4 and a propellant gas 5, which is introduced in the form of a so-called “liquid gas” in a small amount together with the writing liquid 4 in the tank.
  • a halogen hydrocarbon such as "Frigen” or the like is suitable as the propellant.
  • the propellant gas 5 is constantly contained in the storage tank 1 and is under its own vapor pressure, which is preferably between about 1 and 5 bar, in particular 1 and 3 bar, at room temperature.
  • a writing fluid could also be used which develops a vapor pressure of the order of magnitude mentioned at room temperature and is constantly under the effect of this pressure in the storage tank.
  • a writing tube 6 is fixedly inserted into the free end of the housing 2 in a manner known per se, in whose axial bore a needle 7 of smaller diameter than the diameter of the bore is freely displaceable.
  • the needle 7 projects approximately 0.2 mm beyond the free end of the writing tube 6.
  • the needle 7 is also firmly connected in a known manner to a falling weight 8 which is freely displaceable in the housing 2.
  • the drop weight 8 moves back and forth with the needle 7 attached to it, so that dried-on ink at the tip of the writing tube 6 can be released.
  • the drop weight 8 is in the embodiment shown under the action of a compression spring 9, the drop weight 7 towards the writing tube 6 preloaded.
  • this compression spring is not absolutely necessary for the operation of the writing device.
  • the housing 2 has an annular gap-shaped opening 12 between the housing wall and the security plug 11, which is directed towards the storage tank 1.
  • the opening 12 continues through recesses 13 of the locking plug 11 into a number of capillary gaps 14 between the wall 15 of the housing 2 and the outside of the drop weight needle 7 up to the central bore of the writing tube 6, where the writing fluid between the inner wall of the writing tube and the needle 7, supported by capillary action until it flows to the nib 16 to exit.
  • the storage tank 1 contains at its end connected to the housing 2 a closure valve in the form of a sealing ball 17 made of rubber or another elastomeric material.
  • a closure valve in the form of a sealing ball 17 made of rubber or another elastomeric material.
  • the sealing ball 17 in order to fulfill its locking function on the tank 1, snaps into a locking groove 18 formed on the tank.
  • the sealing ball becomes 17 pressed out of the locking groove by the locking plug 11, which is firmly seated in the housing 2, so that it is in the position shown in FIG. 1 occupies in which the Eift inlet opening 12 of the housing 2 is in communication with an outlet opening 19 of the tank 1.
  • the writing liquid 4 can pass from the storage tank 1 into the housing 2 and from there reach the writing tip 16 in the manner already described.
  • the front end of the writing tube 6 lying inside the housing 2 has the shape of a roof-like beveled annular cutting edge 21 which serves as a valve seat.
  • a sealing element 22 as the valve body, the g kun when not in use the writing device of the WIR of the propellant gas pressure and the pressure spring 9 is sealingly pressed against the annular cutting edge 21st If, when using the writing device, the writing tip 16 of the writing tube 6 is placed on the drawing paper, the needle 7, which protrudes slightly from the writing tip 16, is shifted inwards, so that the sealing element 22 inevitably lifts off from the ring cutting edge 21 and the outflow of the writing liquid from the Writing tube 6 is ensured.
  • the valve consisting of the parts 21, 22 ensures that the writing liquid under the pressure of the propellant gas is reliably prevented from flowing out.
  • the valve opened easily.
  • the valve closes immediately under the action of the propellant gas pressure and the compression spring 9.
  • the drop weight 8 is guided on the inner surface of the housing 2 provided with the capillary gaps 14 (FIG. 3).
  • a capillary sponge 23 for example in the form of a foamed plastic, is arranged in front of the outlet opening 19.
  • the sponge 23 constantly soaks up writing liquid and ensures that this liquid passes into the outlet opening 19 under the action of the propellant gas 5, so that even the last remnants of the writing liquid can be used.
  • the writing device shown and described is not only suitable for use in an almost vertical position, in which the space filled with propellant gas 5 is located on the left side of the storage tank 1 in FIG. 1.
  • the writing device can, in particular, as shown in FIG. 1, be used largely horizontally on steeply standing drawing boards or the like, in which case the space filled with propellant gas has the position shown in FIG. 1.
  • the capillary sponge 23, which is always filled with color liquid, proves to be favorable with respect to the The writing fluid 4 passes under the action of the propellant gas 5 from the storage tank 1 into the housing 2 and the writing tube 6.
  • the capillary sponge 23 is held firmly by a fastening disk 25, which is provided with openings 24 and bears against the inner wall of the storage tank 1 with low tension.
  • the writing fluid can enter the capillary sponge 23 via the openings 24.
  • the sealing ball 17 between the Sicherun g sstopfen 1 and the annular Kapillarschwamm 23 held.
  • the sealing ball 17 could also be pushed freely into the tank interior when the housing 2 is joined to the tank 1, where it then floats freely on the surface of the writing fluid supply.
  • the writing device described so far essentially consists of the cartridge-like storage tank 1 and the housing 2. After the writing liquid in the tank 1 has been used up, the empty tank is unscrewed and replaced with a new, full tank. In another embodiment, the tank 1 is permanently and permanently connected to the housing 2. After the writing fluid has been used up, the entire unit is thrown away. In this case, the sealing ball 17 is omitted.
  • the storage tank 1 is, as can also be seen from Fig. 1, with a e.g. welded lid 26 closed.
  • the cover 26 is applied after the writing liquid 4 and the (liquid) propellant gas 5 have been introduced.
  • the end of the storage tank 1 which has not yet been closed by the cover 26 also enables the insertion of the sealing ball 17, the capillary sponge 23 and the fastening disk 25.
  • An O-ring 27 serves to seal between the storage tank 1 and the housing 2.
  • the diameter of the ring cutter 21 is particularly important to make the diameter of the ring cutter 21 as small as possible, for example about 0.4 mm, so that the force required to close and open the valve is also low. Since the writing tube 6 has a small diameter from the start, it is therefore advantageous to design the valve in the form of the aforementioned ring cutting edge 21 directly at the end of the writing tube 6 in the housing 2 and as the valve body the free front end provided with the sealing element 22 to take advantage of the falling weight 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
  • Holo Graphy (AREA)
  • Noodles (AREA)
  • Facsimile Heads (AREA)

Abstract

The invention relates to a writing device comprising a storage tank for Indian ink or another writing medium, a housing which is open in the direction of the tank, a tubular pen which is arranged on the housing, a needle which is axially displaceable in the tubular pen, and a drop weight member which is attached to the needle and is displaceable in the interior of the housing. The tank contains a propellant which is subjected to its own vapor pressure and acts directly on the writing medium, and the end of the tubular pen located in the interior of the housing is designed as a valve seat onto which a valve body formed on the oppositely located end of the drop weight member can be sealingly positioned.

Description

Die Erfindung betrifft eine Schreibvorrichtung mit einem Vorratstank für Tusche oder eine andere Schreibflüssigkeit, und einem zum Tank hin offenen Gehäuse, mit einem am Gehäuse angeordneten Schreibrohr, mit einer im Schreibrohr axial verschieblichen Nadel und mit einem an der Nadel befestigten, im Inneren des Gehäuses verschieblichen Fallgewicht.The invention relates to a writing device with a storage tank for ink or another writing fluid, and a housing open to the tank, with a writing tube arranged on the housing, with a needle axially displaceable in the writing tube and with a needle attached to the housing, displaceable inside the housing Drop weight.

Derartige Schreibvorrichtungen werden hand- oder maschinengeführt und sind mit pigmenthaltigen, mehr oder weniger dickflüssigen Tuschen oder dergleichen gefüllt. Bei solchen Schreibvorrichtungen wird gefordert, daß bei jeder Schreibgeschwindigkeit zuverlässig so viel Schreibflüssigkeit ausfließt, daß die Schrift gleichmäßig deckend und sauber ausfällt, sowie keine verdicktenZeichenanfänge oder Unterbrechungen des Tuscheflusses auftreten.Such writing devices are hand or machine-operated and are filled with pigment-containing, more or less viscous inks or the like. In such writing devices, it is required that at any writing speed so much writing fluid flows out reliably that the writing is uniformly opaque and clean, and that there are no thickened characters or interruptions in the flow of the ink.

Es ist bekannt, bei Tuscheschreibern, die in numerisch gesteuerten Zeichenmaschinen eingesetzt sind, den Vorratstank für die Schreibflüssigkeit durch ein Gas, z.B. Pressluft, unter geringen Überdruck zu setzen und diesen Überdruck entsprechend dem Bedarf an Tusche durch Magnetventile zu- und abzuschalten. Dabei ist es auch möglich, das Ausfließen der Tusche in Schreibpausen durch Aufschalten eines geringen Unterdrucks zu verhindern.It is known that in ink pens used in numerically controlled drawing machines, the storage tank for the writing liquid by a gas, e.g. Compressed air to put under slight overpressure and to switch this overpressure on and off according to the need for ink by means of solenoid valves. It is also possible to prevent the ink from flowing out during breaks in writing by applying a slight negative pressure.

Ein wesentlicher Nachteil dieser Schreiber liegt in ihrem apparativen Aufwand: Zwischen dem Treibgas und der Schreibflüssigkeit ist im Vorratstank ein Kolben angeordnet, der zur Schwergängigkeit neigt und somit ein sensibles Beaufschlagen der Flüssigkeit mit Druck häufig beeinträchtigt. Schneller Druckwechsel und damit hohe Schreibgeschwindigkeit und Zeichenfolgefrequenz wird häufig auch durch die Kompressibilität des Gases behindert. Die notwendigen Schlauchverbindungen zwischen Magnetventil und Schreibflüssigkeitsvorratstank erschweren die Handhabung der Vorrichtung und machen diese nur für maschinengeführte Schreiber praktikabel.A major disadvantage of these recorders lies in their expenditure on equipment: a piston is arranged in the storage tank between the propellant gas and the writing liquid, which tends to become stiff and thus frequently impairs sensitive pressure on the liquid. Rapid pressure changes and thus high writing speeds and string frequencies are often hampered by the compressibility of the gas. The necessary hose connections between the solenoid valve and the writing fluid storage tank make handling the device more difficult and only make it practical for machine-operated typists.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Schreibvorrichtung so zu verbessern, daß bei kleinstem apparativem Aufwand und insbesondere unter Wegfall von Drucksteuerelementen ein gleichmäßiger Fluß der Schreibflüssigkeit beim Zeichnen sichergestellt ist.It is an object of the invention to improve a generic writing device in such a way that a uniform flow of the writing fluid during drawing is ensured with the smallest amount of equipment and in particular with the elimination of pressure control elements.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Vorratstank ein unter seinem eigenen Dampfdruck stehendes, direkt auf die Schreibflüssigkeit wirkendes Treibgas enthalten ist, und das im Inneren des Gehäuses liegende Stirnende des Schreibrohres als Ventilsitz ausgebildet ist, auf den ein am gegenüberliegenden Ende des Fallgewichtes ausgebildeter Ventilkörper abdichtend aufsetzbar ist.The object is achieved in that a propellant gas which is under its own vapor pressure and acts directly on the writing liquid is contained in the storage tank, and the front end of the writing tube lying inside the housing is designed as a valve seat on which a trained at the opposite end of the drop weight Valve body can be placed sealingly.

Die nachstehende Beschreibung einer bevorzugten Ausführungsform der Erfindung dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:

  • Fig. 1 eine Längsschnittansicht einer Tusche-Schreibvorrichtung;
  • Fig. 2 eine vergrößerte Schnittdarstellung im Bereich A der Fig. 1 und
  • Fig. 3 eine Querschnittsansicht entlang der Linie 3-3 in Fig. 2.
The following description of a preferred embodiment of the invention serves in conjunction with the accompanying drawings for further explanation. Show it:
  • Fig. 1 is a longitudinal sectional view of an ink writing device;
  • Fig. 2 is an enlarged sectional view in area A of Fig. 1 and
  • 3 is a cross-sectional view taken along line 3-3 in FIG. 2.

Die auf der Zeichnung dargestellte Schreibvorrichtung besteht aus einem Vorratstank 1, auf dessen eines Ende das eigentliche Schreibgerät in Gestalt eines Gehäuses 2 mittels einer Gewindeverbindung 3 aufgeschraubt ist. Der allseits hermetisch verschlossene Tank 1 enthält einep Vorrat an Tusche oder einer anderen Schreibflüssigkeit 4 sowie ein Treibgas 5, welches in Form eines sogenannten "Flüssiggases" in geringer Menge zusammen mit der Schreibflüssigkeit 4 in den Tank eingebracht wird. Als Treibgas eignet sich beispielsweise ein Halogen-Kohlenwasserstoff wie "Frigen" oder dergleichen. Das Treibgas 5 ist ständig im Vorratstank 1 enthalten und steht unter seinem eigenen Dampfdruck, der vorzugsweise zwischen etwa 1 und 5 bar, insbesondere 1 und 3 bar, bei Raumtemperatur beträgt. Statt eines besonderen Treibgases könnte auch eine Schreibflüssigkeit verwendet werden, die bei Raumtemperatur einen Dampfdruck in der genannten Größenordnung entwickelt und im Vorratstank ständig unter der Wirkung dieses Druckes steht.The writing device shown in the drawing consists of a storage tank 1, on one end of which the actual writing instrument in the form of a housing 2 is screwed by means of a threaded connection 3. The tank 1, which is hermetically sealed on all sides, contains a supply of ink or another writing pen liquid 4 and a propellant gas 5, which is introduced in the form of a so-called "liquid gas" in a small amount together with the writing liquid 4 in the tank. A halogen hydrocarbon such as "Frigen" or the like is suitable as the propellant. The propellant gas 5 is constantly contained in the storage tank 1 and is under its own vapor pressure, which is preferably between about 1 and 5 bar, in particular 1 and 3 bar, at room temperature. Instead of a special propellant gas, a writing fluid could also be used which develops a vapor pressure of the order of magnitude mentioned at room temperature and is constantly under the effect of this pressure in the storage tank.

In das freie Ende des Gehäuses 2 ist in an sich bekannter Weise ein Schreibrohr 6 fest eingesetzt, in - dessen axialer Bohrung eine Nadel 7 kleineren Durchmessers als der Durchmesser der Bohrung frei verschieblich ist. Die Nadel 7 steht bei Nichtgebrauch der Schreibvorrichtung ca. 0,2 mm über das freie Ende des Schreibrohres 6 vor. Die Nadel 7 ist in ebenfalls bekannter Weise mit einem frei im Gehäuse 2 verschieblichen Fallgewicht 8 fest verbunden. Beim Schütteln der Schreibvorrichtung bewegt sich das Fallgewicht 8 mit der daran befestigten Nadel 7 hin und her, so daß eingetrocknete Tusche an der Schreibspitze des Schreibrohres 6 gelöst werden kann. Das Fallgewicht 8 steht bei der dargestellten Ausführungsform unter der Wirkung einer Druckfeder 9, die das Fallgewicht 7 zum Schreibrohr 6 hin vorspannt. Für die Wirkungsweise der Schreibvorrichtung ist diese Druckfeder jedoch nicht unbedingt erforderlich. Als Gegenlager für die Druckfeder 9 dient ein Stopfen 11, der mit Schnappwirkung in das Gehäuse 2 eingespannt ist.A writing tube 6 is fixedly inserted into the free end of the housing 2 in a manner known per se, in whose axial bore a needle 7 of smaller diameter than the diameter of the bore is freely displaceable. When the writing device is not in use, the needle 7 projects approximately 0.2 mm beyond the free end of the writing tube 6. The needle 7 is also firmly connected in a known manner to a falling weight 8 which is freely displaceable in the housing 2. When the writing device is shaken, the drop weight 8 moves back and forth with the needle 7 attached to it, so that dried-on ink at the tip of the writing tube 6 can be released. The drop weight 8 is in the embodiment shown under the action of a compression spring 9, the drop weight 7 towards the writing tube 6 preloaded. However, this compression spring is not absolutely necessary for the operation of the writing device. A plug 11, which is clamped into the housing 2 with a snap action, serves as the counter bearing for the compression spring 9.

Wie dargestellt, weist das Gehäuse 2 eine zum Vorratstank 1 hin gerichtete, ringspaltförmige öffnung 12 zwischen Gehäusewand und Sicherungsstopfen 11 auf. Die öffnung 12 setzt sich über Ausnehmungen 13 des Sicherungsstopfens 11 in mehrere Kapillarspalten 14 zwischen der Wand 15 des Gehäuses 2 und der Außenseite der Fallgewichtsnadel 7 bis zur Mittelbohrung des Schreibrohres 6 hin fort, wo die Schreibflüssigkeit zwischen der Innenwand des Schreibrohres und der Nadel 7, unterstützt durch Kapillarwirkung, bis zur Schreibspitze 16 fließt, um dort auszutreten.As shown, the housing 2 has an annular gap-shaped opening 12 between the housing wall and the security plug 11, which is directed towards the storage tank 1. The opening 12 continues through recesses 13 of the locking plug 11 into a number of capillary gaps 14 between the wall 15 of the housing 2 and the outside of the drop weight needle 7 up to the central bore of the writing tube 6, where the writing fluid between the inner wall of the writing tube and the needle 7, supported by capillary action until it flows to the nib 16 to exit.

Der Vorratstank 1 enthält an seinem mit dem Gehäuse 2 verbundenen Ende ein Verschlußventil in Gestalt einer Abdichtkugel 17 aus Gummi oder einem anderen elastomeren Material. Solange der Tank 1 noch nicht mit dem Gehäuse 2 verschraubt ist, liegt die Abdichtkugel 17, um ihre Verschlußfunktion am Tank 1 zu erfüllen, mit Schnappwirkung abdichtend in einer am Tank ausgebildeten Sperrnut 18. Beim Verschrauben des Tanks 1 mit dem Gehäuse 2 wird die Abdichtkugel 17 durch den fest im Gehäuse 2 sitzenden Sicherungsstopfen 11 aus der Sperrnut herausgedrückt, so daß sie die in Fig. 1 dargestellte Lage einnimmt, in welcher die Eifttrittsöffnung 12 des Gehäuses 2 mit einer Austrittsöffnung 19 des Tanks 1 in Verbindung steht. Somit kann die Schreibflüssigkeit 4 unter der direkten Wirkung des Treibgases 5 aus dem Vorratstank 1 in das Gehäuse 2 übertreten und von da auf dem bereits beschriebenen Wege zur Schreibspitze 16 gelangen.The storage tank 1 contains at its end connected to the housing 2 a closure valve in the form of a sealing ball 17 made of rubber or another elastomeric material. As long as the tank 1 is not yet screwed to the housing 2, the sealing ball 17, in order to fulfill its locking function on the tank 1, snaps into a locking groove 18 formed on the tank. When screwing the tank 1 to the housing 2, the sealing ball becomes 17 pressed out of the locking groove by the locking plug 11, which is firmly seated in the housing 2, so that it is in the position shown in FIG. 1 occupies in which the Eift inlet opening 12 of the housing 2 is in communication with an outlet opening 19 of the tank 1. Thus, under the direct effect of the propellant gas 5, the writing liquid 4 can pass from the storage tank 1 into the housing 2 and from there reach the writing tip 16 in the manner already described.

Das im Inneren des Gehäuses 2 liegende Stirnende des Schreibrohres 6 hat die Gestalt einer dachartig abgeschrägten Ringschneide 21, die als Ventilsitz dient. Auf dem der Ringschneide 21 gegenüberliegende Ende des Fallgewichtes 8 ist in einer entsprechenden Ausnehmung ein Dichtelement 22 als Ventilkörper angeordnet, das bei Nichtgebrauch der Schreibvorrichtung unter der Wir- kung des Treibgasdruckes und der Druckfeder 9 abdichtend gegen die Ringschneide 21 gepresst ist. Wenn im Gebrauch der Schreibvorrichtung die Schreibspitze 16 des Schreibrohres 6 auf das Zeichenpapier aufgesetzt wird, wird die geringfügig aus der Schreibspitze 16 herausragende Nadel 7 nach einwärts verschoben, so daß sich das Dichtelement 22 von der Ringschneide 21 zwangsläufig abhebt und das Ausfließen der Schreibflüssigkeit aus dem Schreibrohr 6 sichergestellt ist. Das aus den Teilen 21,22 bestehende Ventil sorgt bei Nichtgebrauch der Schreibvorrichtung dafür, daß ein Ausfließen der unter dem Druck des Treibgases stehenden Schreibflüssigkeit zuverlässig verhindert ist. Beim Aufsetzen der Schreibvorrichtung auf die Zeichenfläche wird das Ventil problemlos geöffnet. Beim Abheben der Schreibvorrichtung von der Zeichenfläche schließt sich das Ventil sofort unter der Wirkung des Treibgasdruckes und der Druckfeder 9. Das Fallgewicht 8 wird dabei an der mit den Kapillarspalten 14 versehenen Innenfläche des Gehäuses 2 geführt (Fig. 3).The front end of the writing tube 6 lying inside the housing 2 has the shape of a roof-like beveled annular cutting edge 21 which serves as a valve seat. On which the annular cutting edge 21 opposite end of the drop weight 8 is arranged in a corresponding recess, a sealing element 22 as the valve body, the g kun when not in use the writing device of the WIR of the propellant gas pressure and the pressure spring 9 is sealingly pressed against the annular cutting edge 21st If, when using the writing device, the writing tip 16 of the writing tube 6 is placed on the drawing paper, the needle 7, which protrudes slightly from the writing tip 16, is shifted inwards, so that the sealing element 22 inevitably lifts off from the ring cutting edge 21 and the outflow of the writing liquid from the Writing tube 6 is ensured. When the writing device is not in use, the valve consisting of the parts 21, 22 ensures that the writing liquid under the pressure of the propellant gas is reliably prevented from flowing out. When the writing device is placed on the drawing surface, the valve opened easily. When the writing device is lifted off the drawing surface, the valve closes immediately under the action of the propellant gas pressure and the compression spring 9. The drop weight 8 is guided on the inner surface of the housing 2 provided with the capillary gaps 14 (FIG. 3).

An der dem Gehäuse 2 zugewandten Seite des Vorratstanks 1 ist vor der Austrittsöffnung 19 ein Kapillarschwamm 23, beispielsweise in Gestalt eines geschäumten Kunststoffes, angeordnet. Der Schwamm 23 saugt sich ständig mit Schreibflüssigkeit voll und gewährleistet ein Übertreten dieser Flüssigkeit in die Austrittsöffnung 19 unter der Wirkung des Treibgases 5, so daß auch letzte Reste der Schreibflüssigkeit genutzt werden können.On the side of the storage tank 1 facing the housing 2, a capillary sponge 23, for example in the form of a foamed plastic, is arranged in front of the outlet opening 19. The sponge 23 constantly soaks up writing liquid and ensures that this liquid passes into the outlet opening 19 under the action of the propellant gas 5, so that even the last remnants of the writing liquid can be used.

Die dargestellte und beschriebene Schreibvorrichtung eignet sich nicht nur für eine Verwendung in nahezu senkrechter Lage, in welcher sich der mit Treibgas 5 gefüllte Raum an der in Fig. 1 links gelegenen Seite des Vorratstanks 1 befindet. Die Schreibvorrichtung kann insbesondere auch, wie in Fig. 1 dargestellt, weitgehend horizontal an steil stehenden Zeichenbrettern oder dergleichen eingesetzt werden, in welchem Fall der mit Treibgas gefüllte Raum die in Fig. 1 gezeichnete Lage hat. Auch im letztgenannten Fall erweist sich der stets mit Farbflüssigkeit gefüllte Kapillarschwamm 23 als günstig mit Bezug auf den Übertritt der Schreibflüssigkeit 4 unter der Wirkung des Treibgases 5 aus dem Vorratstank 1 in das Gehäuse - 2 und das Schreibrohr 6.The writing device shown and described is not only suitable for use in an almost vertical position, in which the space filled with propellant gas 5 is located on the left side of the storage tank 1 in FIG. 1. The writing device can, in particular, as shown in FIG. 1, be used largely horizontally on steeply standing drawing boards or the like, in which case the space filled with propellant gas has the position shown in FIG. 1. Also in the latter case, the capillary sponge 23, which is always filled with color liquid, proves to be favorable with respect to the The writing fluid 4 passes under the action of the propellant gas 5 from the storage tank 1 into the housing 2 and the writing tube 6.

Der Kapillarschwamm 23 ist durch eine mit Durchbrechungen 24 versehene Befestigungsscheibe 25, die mit geringer Spannung an der Innenwand des Vorratstanks 1 anliegt, fest gehalten. Über die Durchbrechungen 24 kann die Schreibflüssigkeit in den Kapillarschwamm 23 eintreten.The capillary sponge 23 is held firmly by a fastening disk 25, which is provided with openings 24 and bears against the inner wall of the storage tank 1 with low tension. The writing fluid can enter the capillary sponge 23 via the openings 24.

Wie in Fig. 1 dargestellt, ist die Abdichtkugel 17 zwischen dem Sicherungsstopfen 1 und dem ringförmigen Kapillarschwamm 23 festgehalten. Die Abdichtkugel 17 könnte jedoch auch beim Zusammenfügen des Gehäuses 2 mit dem Tank 1 frei in den Tankinnenraum gestoßen werden, wo sie dann frei auf der Oberfläche des Schreibflüssigkeitsvorrates schwimmt.As shown in Fig. 1, the sealing ball 17 between the Sicherun g sstopfen 1 and the annular Kapillarschwamm 23 held. However, the sealing ball 17 could also be pushed freely into the tank interior when the housing 2 is joined to the tank 1, where it then floats freely on the surface of the writing fluid supply.

Die bisher beschriebene Schreibvorrichtung besteht im wesentlichen aus dem patronenartigen Vorratstank 1 und dem Gehäuse 2. Nach Verbrauch der Schreibflüssigkeit im Tank 1 wird der leere Tank abgeschraubt und gegen einen neuen, vollen Tank ausgewechselt. Bei einer anderen Ausführungsform ist der Tank 1 ständig und unlösbar mit dem Gehäuse 2 verbunden. Nach Verbrauch der Schreibflüssigkeit wird die ganze Einheit weggeworfen. In diesem Fall entfällt die Abdichtkugel 17.The writing device described so far essentially consists of the cartridge-like storage tank 1 and the housing 2. After the writing liquid in the tank 1 has been used up, the empty tank is unscrewed and replaced with a new, full tank. In another embodiment, the tank 1 is permanently and permanently connected to the housing 2. After the writing fluid has been used up, the entire unit is thrown away. In this case, the sealing ball 17 is omitted.

Der Vorratstank 1 ist, wie ebenfalls aus Fig. 1 ersichtlich, mit einem z.B. aufgeschweißten Deckel 26 verschlossen. Der Deckel 26 wird nach dem Einbringen der Schreibflüssigkeit 4 und des (flüssigen) Treibgases 5 aufgebracht. Das noch nicht durch den Deckel 26 verschlossene Ende des Vorratstanks 1 ermöglicht auch das Einführen der Abdichtkugel 17, des Kapillarschwamms 23 und der Befestigungsscheibe 25.The storage tank 1 is, as can also be seen from Fig. 1, with a e.g. welded lid 26 closed. The cover 26 is applied after the writing liquid 4 and the (liquid) propellant gas 5 have been introduced. The end of the storage tank 1 which has not yet been closed by the cover 26 also enables the insertion of the sealing ball 17, the capillary sponge 23 and the fastening disk 25.

Ein O-Ring 27 dient der Abdichtung zwischen Vorratstank 1 und Gehäuse 2.An O-ring 27 serves to seal between the storage tank 1 and the housing 2.

Von besonderer Wichtigkeit ist es, den Durchmesser der Ringschneide 21 möglichst klein, beispielsweise etwa 0,4 mm auszubilden, so daß die zum Verschließen und öffnen des Ventils erforderliche Kraft ebenfalls gering ist. Da das Schreibrohr 6 von Hause aus einen geringen Durchmesser hat, ist es daher günstig, das Ventil in Form der erwähnten Ringschneide 21 unmittelbar an dem im Gehäuse 2 liegenden Ende des.Schreibrohres 6 auszubilden und als Ventilkörper das freie, mit dem Dichtelement 22 versehene Stirnende des Fallgewichts 8 auszunutzen.It is particularly important to make the diameter of the ring cutter 21 as small as possible, for example about 0.4 mm, so that the force required to close and open the valve is also low. Since the writing tube 6 has a small diameter from the start, it is therefore advantageous to design the valve in the form of the aforementioned ring cutting edge 21 directly at the end of the writing tube 6 in the housing 2 and as the valve body the free front end provided with the sealing element 22 to take advantage of the falling weight 8.

Claims (10)

1. Schreibvorrichtung mit einem Vorratstank für Tusche oder eine andere Schreibflüssigkeit, die unter dem Druck eines Treibgases steht, mit einem zum Tank hin offenen Gehäuse, mit einem am Gehäuse angeordneten Schreibrohr, mit einer im Schreibrohr axial verschieblichen Nadel und mit einem an der Nadel befestigten, im Inneren des Gehäuses verschieblichen Fallgewicht, - dadurch gekennzeichnet, daß im Tank (1) ein unter seinem eigenen Dampfdruck stehendes, direkt auf die Schreibflüssigkeit (4) wirkendes Treibgas (5) enthalten ist, und das im Inneren des Gehäuses (2) liegende Stirnende des Schreibrohres (6) als Ventilsitz (21) ausgebildet ist, auf den ein am gegenüberliegenden Ende des Fallgewichts (8) ausgebildeter Ventilkörper (22) abdichtend aufsetzbar ist.1. Writing device with a storage tank for ink or another writing liquid, which is under the pressure of a propellant gas, with a housing open to the tank, with a writing tube arranged on the housing, with a needle axially displaceable in the writing tube and with one attached to the needle , inside the housing movable weight, - characterized in that in the tank (1) a standing under its own vapor pressure, directly acting on the writing fluid (4) propellant gas (5) is contained, and that inside the housing (2) The front end of the writing tube (6) is designed as a valve seat (21) onto which a valve body (22) formed at the opposite end of the falling weight (8) can be placed in a sealing manner. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilsitz am Schreibrohr (6) als Ringschneide (21) ausgebildet ist.2. Device according to claim 1, characterized in that the valve seat on the writing tube (6) is designed as an annular cutting edge (21). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Ventilkörper (22) aus elastomerem Material besteht.3. Apparatus according to claim 1 or 2, characterized in that the valve body (22) consists of elastomeric material. 4. Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der Ventilkörper als Dichtelement (22) in einer Aussparung des Fallgewichts (8) angeordnet ist.4. Apparatus according to claim 1, 2 or 3, characterized in that the valve body is arranged as a sealing element (22) in a recess of the falling weight (8). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Nadel (7) und Ventilkörper (22) koaxial zueinander sind und die Nadel den Ventilkörper durchdringt.5. Device according to one of claims 1 to 4, characterized in that the needle (7) and valve body (22) are coaxial to one another and the needle penetrates the valve body. 6. Vorrichtung nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß Vorratstank (1) und Gehäuse (2) mit Schreibrohr (6) als einmal verwendbare Wegwerfeinheit ständig fest miteinander verbunden sind.6. Device according to one of the preceding claims, characterized in that the storage tank (1) and housing (2) with a writing tube (6) as a disposable disposable unit are permanently connected to each other. 7. Vorrichtung nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Vorratstank (1) mit einem Verschlußventil (17) versehen und austauschbar mit dem das Schreibrohr (6) tragenden"Gehäuse (2) verbunden ist.7. Device according to one of the preceding claims, characterized in that the storage tank (1) is provided with a closure valve (17) and is exchangeably connected to the housing (2) carrying the writing tube (6). 8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Verschlußventil als Abdichtkugel (17) ausgebildet ist.8. The device according to claim 7, characterized in that the closure valve is designed as a sealing ball (17). 9. Vorrichtung nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Fallgewicht (8) durch eine Feder (9) gegen den Ventilsitz (21) vorgespannt ist.9. Device according to one of the preceding claims, characterized in that the falling weight (8) is biased by a spring (9) against the valve seat (21). 10. Vorrichtung nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß an der dem Gehäuse (2) benachbarten Seite des Vorratstanks (1), wo die Schreibflüssigkeit (4) durch wenigstens eine Austrittsöffnung (19) in das Gehäuse (2) übertritt, ein Kapillarschwamm (23) angeordnet ist.10. Device according to one of the preceding claims, characterized in that on the housing (2) adjacent side of the storage tank (1), where the writing fluid (4) passes through at least one outlet opening (19) in the housing (2) Capillary sponge (23) is arranged.
EP84116112A 1983-12-31 1984-12-21 Writing device Expired EP0149216B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116112T ATE34341T1 (en) 1983-12-31 1984-12-21 WRITING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3347708 1983-12-31
DE19833347708 DE3347708A1 (en) 1983-12-31 1983-12-31 WRITING DEVICE

Publications (3)

Publication Number Publication Date
EP0149216A2 true EP0149216A2 (en) 1985-07-24
EP0149216A3 EP0149216A3 (en) 1985-08-21
EP0149216B1 EP0149216B1 (en) 1988-05-18

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ID=6218547

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EP84116112A Expired EP0149216B1 (en) 1983-12-31 1984-12-21 Writing device

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US (1) US4605331A (en)
EP (1) EP0149216B1 (en)
JP (1) JPS60159097A (en)
AT (1) ATE34341T1 (en)
DE (1) DE3347708A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61152484U (en) * 1985-03-14 1986-09-20
US5073058A (en) * 1989-05-17 1991-12-17 Kabushiki Kaisha Sakura Kurepasu Implement for applying liquid
DE4013011C1 (en) * 1990-04-24 1991-03-14 Rotring-Werke Riepe Kg, 2000 Hamburg, De Tubular pen used as writing implement - has buffer chamber between front end of bore and rear end of tube which is checked for ink level by regulator
JP2579661Y2 (en) * 1991-11-28 1998-08-27 ぺんてる株式会社 Small tube writing instrument
CN104129199A (en) * 2014-07-23 2014-11-05 中国人民武装警察部队工程大学 Needle pen insertion leg

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Also Published As

Publication number Publication date
US4605331A (en) 1986-08-12
DE3347708A1 (en) 1985-07-11
JPH0351240B2 (en) 1991-08-06
JPS60159097A (en) 1985-08-20
EP0149216A3 (en) 1985-08-21
EP0149216B1 (en) 1988-05-18
ATE34341T1 (en) 1988-06-15

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