EP1896267B1 - Writing implement for painting, drawing and marking - Google Patents

Writing implement for painting, drawing and marking Download PDF

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Publication number
EP1896267B1
EP1896267B1 EP06753550A EP06753550A EP1896267B1 EP 1896267 B1 EP1896267 B1 EP 1896267B1 EP 06753550 A EP06753550 A EP 06753550A EP 06753550 A EP06753550 A EP 06753550A EP 1896267 B1 EP1896267 B1 EP 1896267B1
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EP
European Patent Office
Prior art keywords
writing
reservoir
valve
tip
utensil according
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EP06753550A
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German (de)
French (fr)
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EP1896267A2 (en
Inventor
Rainer Kaufmann
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EDDING AG
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EDDING AG
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Priority to PL06753550T priority Critical patent/PL1896267T3/en
Publication of EP1896267A2 publication Critical patent/EP1896267A2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
    • B43K1/086—Nibs; Writing-points with ball points; Balls or ball beds with resilient supporting means for the ball, e.g. springs
    • 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
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B43K8/04—Arrangements for feeding ink to writing-points

Definitions

  • the present invention relates to a writing instrument for free writing fluid.
  • a writing instrument which is also suitable for painting, drawing and marking.
  • writing instruments in the sense of the invention also include markers, high-lighters, felt-tip pens and the like.
  • a marker which has a valve for controlling the flow from a reservoir into a delivery channel.
  • the delivery channel extends through a delivery member to a marker tip.
  • the delivery member is retractable to open the valve when the marker tip is pressed against a surface.
  • An auxiliary chamber is provided between the ball valve member and the feeding member.
  • the pre-chamber is sealed with an elastic membrane so that upon release of pressure on the writing tip, the membrane returns to its original position and pulls the valve member back into the valve seat.
  • a marker which has a reservoir, a valve, a flow restrictor and an air line, the flow restrictor being provided downstream of the valve and the air line not extending into the reservoir interior but being located on the reservoir rim.
  • a pen in which the ink discharge takes place via a valve.
  • a writing tip is arranged longitudinally displaceable in the front part of the pen. During writing, the writing tip is pushed back and the valve opens so that ink can be supplied to the writing tip. At the same time, a head of the retracted writing tip closes the flow of ink to the valve so that only a predetermined amount of ink is supplied to the writing tip. If this amount of ink is used up, the pen must be discontinued, so that the valve is closed again and ink can flow up to the valve.
  • WO 93/05966 is a writing instrument known, the reservoir communicates via a through hole with the environment.
  • the writing fluid is sealed with a movable plug opposite the through-hole.
  • the present invention has for its object to provide a leak-proof writing instrument that creates a simple Schreibfluß with simple means.
  • the writing instrument according to the invention is suitable for inks.
  • the invention is by no means limited to the use of inks, but can be used for any writing fluids, especially for paints, as well as writing fluids with or without pigments.
  • the writing instrument has a closed reservoir for the writing fluid, which is provided with a discharge opening for the writing fluid and another opening. In the reservoir the ink is present as a free liquid, so-called free ink system.
  • the writing instrument has an elongated writing or marking tip, which is connected via a connecting path with the reservoir and is displaceably mounted along its longitudinal axis.
  • the designed as a writing and / or marking tip of the writing instrument is referred to as a writing tip for simplicity.
  • connection path connects via the outlet opening the reservoir with the writing tip.
  • a valve is provided in the writing instrument, which is arranged in the liquid channel. The valve cooperates with the writing tip such that upon a force in the direction of the reservoir on the writing tip, the valve opens the fluid channel.
  • the connection path is free and writing fluid enters the writing tip from the reservoir.
  • the further opening in the reservoir is connected via an air line with the environment.
  • the open valve in the communication path ensures a continuous flow of writing fluid into the writing tip.
  • the air line for connection to the environment avoids that the write flow ceases because a negative pressure in the reservoir has formed by the exiting writing fluid.
  • the air line also serves to equalize the pressure when, for example, changes in temperature lead to a change in volume in the reservoir.
  • the writing instrument is leak-proof to a high degree.
  • the force required to open the valve is 0.05 N to 5 N, preferably 0.1 N to 0.4 N.
  • the force that is necessary to open the valve already corresponds to that by placing it on a Underground caused weight of the writing instrument.
  • a flow restrictor is provided between the reservoir and the writing tip.
  • the flow restrictor is dimensioned such that a continuous write flow for the intended writing fluid is formed. Since the writing fluid in the reservoir is always exposed to atmospheric pressure is, the flow restrictor can be dimensioned much more accurate than in writing instruments in which the writing fluid is exposed to different pressures.
  • the flow restrictor is designed, for example, as a small-diameter passage section.
  • the valve may preferably have a bendable valve plate, which bears sealingly against a holder. The writing tip is attached to the valve plate, wherein the valve plate is pressed out of the sealing position by the pressure on the writing tip and writing fluid can flow from the reservoir via the flow restrictor.
  • a capillary compensation reservoir can be provided between valve and writing tip.
  • the capillary compensation memory serves to absorb and store excess ink, which has still been passed, for example, before the valve is closed, but is no longer needed.
  • the capillary balance memory is arranged such that ink from the air line is also received by the balance memory.
  • the leading into the interior of the reservoir air duct is preferably formed as a rigid tubular element.
  • the air duct preferably opens in a volume center of the container.
  • the volume center is at rotationally symmetrical ink reservoir, for example, on the axis of symmetry at half height, wherein the reservoir is filled less than half.
  • the mouth of the air line is arranged in the reservoir so that it is always connected to a predetermined amount of the reservoir in all positions with the environment.
  • the reservoir may not be more than half filled with writing fluid, preferably less than half filled with writing fluid.
  • the reservoir has an approximately cylindrical shape, wherein the outlet opening of the reservoir and the further opening are preferably provided at the bottom of the reservoir.
  • the valve is biased into its closing position and opens as soon as a predetermined force is transmitted from the writing tip to the valve member.
  • the flow restrictor may be formed as a channel of reduced diameter and length.
  • the flow restrictor is dimensioned such that, with a downwardly pointing tip, the writing fluid passes in an amount as required for a regular writing flow.
  • the flow restrictor is thus designed for the regular writing, painting, drawing and marking functions.
  • the writing fluid is not sucked through the adhesive force of the writing pad from the reservoir, but flows substantially under the influence of gravity to the writing tip.
  • the stroke is limited to 0.01 to 0.4 mm, preferably to 0.05 to 0.25 mm.
  • the stroke should be as small as the force required to open the valve so low that a user does not notice the opening of the valve.
  • FIG. 1 shows a schematic view of a designed as a marker writing instrument.
  • the writing instrument may, for example, be a paint marker.
  • the writing instrument has a reservoir 10 containing an ink 12.
  • the reservoir 10 does not necessarily form the body of the pen. Rather, it is also conceivable to provide a pen body in which the reservoir 10 is arranged.
  • the reservoir 10 is limited in the illustrated embodiment by a bottom plate 14, while the outer wall of the reservoir 10 extends beyond the bottom plate 14 also to the writing tip.
  • the bottom plate 14 has an eccentrically arranged air opening 16, on which an air line 18 is placed.
  • the air duct 18 extends in a first section parallel to the longitudinal axis of the reservoir 10. In the region of its mouth 20, the air duct 18 kinks and ends in the volume center of the reservoir 10.
  • the volume center here denotes the point that at a slightly less than half-filled reservoir is always exposed and is not covered in any position of the reservoir with liquid.
  • the volume center is the center of the cylinder so that a cylinder less than half full will not cover the center of mass in any position.
  • the bottom plate 14 also has a central opening 22, which opens into a fluid channel.
  • the liquid channel 24 as a communication path between the reservoir and writing tip runs in the illustrated example centrally through the writing instrument.
  • a flow restrictor 26 connects.
  • the fürflußbeskyr 26 narrows the passageway to a cross section such that a flow of writing fluid is formed, which corresponds to the regular Schreibfluß.
  • the flow restrictor is arranged in the manner of a throttle from the writing tip and limits the volume flow of writing fluid from the reservoir.
  • the further determining factor for the flow rate is the length of the capillary, which is also tuned to the desired flow rate.
  • valve 28 which blocks the flow of writing fluid in its closed position.
  • the valve 28 is designed as a valve with valve member and valve seat, wherein the valve member is connected to the marker tip 30.
  • the marker tip 30 moves the valve member out of the valve seat and thus releases the flow of writing fluid from the flow restrictor into the writing tip 30.
  • the valve is elastic Return means (not shown) equipped, which exert a restoring force on the valve member and thus the writing tip.
  • the writing tip 30 protrudes from the housing 32 at its distal end. At the inner end of the writing tip 30, a compensating memory 34 is provided which receives excess writing fluid.
  • the stroke h which is necessary for the complete actuation of the valve, is preferably 0.2 mm or less. The necessary force is 0.2 N.
  • FIG. 2 shows a cross section through a second embodiment of a writing instrument according to the invention.
  • a wall 36 defines a reservoir 38 in which a writing fluid 40 is provided.
  • the bottom of the reservoir 38 is bounded by a bottom member 42 having a central vent 44.
  • the ventilation opening 44 is located in a ventilation channel 46, which is delimited by a vent pipe 48.
  • the vent tube 48 projects centrally into the reservoir 38 and has at its free end an opening 50 which connects the reservoir interior 38 with the ventilation duct 46.
  • the vent channel 44 extends at an angle and leads into the region of the writing tip, where an annular gap 52 is provided for connection to the environment.
  • the annular gap 52 is formed by a gap between the writing tip 54 and the associated wall portion 56 of the writing instrument.
  • About the ventilation duct 46 of the reservoir interior 38 is in communication with the environment and there is a pressure compensation.
  • the bottom element 42 has a second opening 58, which connects the reservoir 38 for the writing fluid 40 with an antechamber 60.
  • the pre-chamber 60 has an outlet opening 61, which is formed in a holding element 62.
  • a flow restrictor 64 formed as a tube closes on, through which the writing fluid 40 is passed from the antechamber 60. The flow restrictor 64 limits the flow rate that flows through the smaller cross section of the opening and the length of the tube.
  • valve with valve member 66 and annular valve seat 68 Downstream of the flow restrictor, the valve with valve member 66 and annular valve seat 68 is provided downstream of the flow restrictor.
  • the valve member 66 has on its side facing away from the valve side recesses 67 which allow a flow of the writing fluid with the valve open.
  • a coil spring 70 is disposed about the flow restrictor 64 and is supported on the bottom member 42.
  • the valve seat 68 is formed as a circumferential projection formed on a separate component 72.
  • the member 72 for the valve seat 68 is inserted into a central recess of a lug 74, wherein the lug may be formed integrally with the bottom plate 42.
  • the marking tip 54 is connected to the valve member 66 designed as a valve tappet.
  • a capillary balance memory 76 is disposed around the marking tip 54.
  • the marker tip 54 protrudes centrally from the tip of the writing instrument. Any writing fluid that has entered the venting channel 46 is supplied in the region of the wall 56 via the capillary storage of the marking tip, so that leakage is effectively prevented.
  • Fig. 3 shows an alternative embodiment of the flow restriction.
  • a bottom element 78 is provided, in which a helical outlet channel 80 is formed.
  • the exit channel 80 extends in the element 78 along the outside, so that this outwardly from the inner wall 82 of the receiving opening for the element 78 is limited.
  • a spring 84 presses in the position shown, the valve stem 86 and the writing tip in the closed position.
  • the valve stem 86 is provided with recesses 87 which allow a flow of writing fluid even when pushed back valve lifter.
  • Fig. 4 shows an alternative embodiment of the valve, wherein the valve member is formed by a rollerball 88.
  • the rollerball 88 is seated in a point 90 which has a central guide channel 92 for the rollerball 88.
  • a coil spring 94 pushes the rollerball into its closed position.
  • the movement of the roller ball 88 in the guide channel 92 is limited in the opposite direction by a stop 96.
  • the distance between roller ball 88 and stop 96 in the closed position of the roller ball defines the maximum stroke of the roller ball.
  • the writing fluid is supplied.
  • Fig. 5 shows a further embodiment of the writing instrument according to the invention in cross section.
  • the writing instrument has a liquid reservoir 112 which is less than half filled with a writing fluid 114.
  • Central to the reservoir 112 is an air duct 116, which communicates with the environment via an air duct 118.
  • the air line 116 protrudes from the lower end into the reservoir 112.
  • the air channel 118 is connected via an annular gap 120 with the environment.
  • the annular gap is bounded outwardly by an annular housing portion 122. Inwardly, the annular gap 120 is bounded by the fiber tip 124.
  • the particular advantage here is to be seen in the fact that any reaching into the air line and the air channel 118 writing fluid can be absorbed as it passes through the air gap by the marker tip 124. This avoids unnecessary leakage of ink.
  • the writing fluid 114 passes through an opening 126 in the channel-shaped fürflußbegrenzer 128.
  • the flow restrictor 128 has a length and a diameter which are selected such that the flow of writing fluid corresponds to the desired write flow at the writing tip.
  • the flow restrictor 128 extends into an annular valve space 130.
  • the valve space 130 is sealed by an elastic valve plate 132.
  • the valve plate 132 has a central holding portion 134 into which the fiber tip 124 is inserted.
  • the elastic valve plate 132 cooperates with a bead 136.
  • the bead is annular around a guide channel 138 is formed on a valve seat plate 140.
  • the guide channel 138 also serves as a guide for the fiber tip 124.
  • the valve plate 132 In the open position, ie the position in which an inwardly directed force acts on the fiber tip 124, the valve plate 132 is bent back and it forms an annular gap between the bead 136 and the plate 132.

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  • Pens And Brushes (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

A writing utensil for a free-flowing writing fluid, comprising a closed reservoir with the writing fluid therein that has an outlet aperture for the writing fluid and a further aperture, an elongate writing tip which communicates with the outlet aperture of the reservoir and is slidably supported, and a valve which is disposed inside a communicating path between the writing tip and reservoir and interacts with the writing tip so as to cause the valve to open the communicating path if a force acts onto the writing tip, wherein the further aperture connects the reservoir to the surroundings via an air line.

Description

Die vorliegende Erfindung betrifft ein Schreibgerät für freie Schreibflüssigkeit. In dem nachfolgenden Text wird auf ein Schreibgerät abgestellt, wobei dieses auch zum Malen, Zeichnen und Markieren geeignet ist. Insbesondere umfassen Schreibgeräte im Sinne der Erfindung auch Marker, High-Lighter, Filzstifte und dergleichen.The present invention relates to a writing instrument for free writing fluid. In the following text is placed on a writing instrument, which is also suitable for painting, drawing and marking. In particular, writing instruments in the sense of the invention also include markers, high-lighters, felt-tip pens and the like.

Aus GB 2 310 592 ist ein Marker bekannt, der ein Ventil zur Steuerung des Durchflusses aus einem Reservoir in einen Zuführkanal besitzt. Der Zuführkanal erstreckt sich durch ein Zuführelement bis zu einer Markerspitze. Das Zuführelement ist zurückziehbar ausgebildet, um das Ventil zu öffnen, wenn die Markerspitze gegen eine Oberfläche gedrückt wird. Eine Hilfskammer ist zwischen dem als Kugel ausgebildeten Ventilglied und dem Zuführelement vorgesehen. Die Vorkammer ist mit einer elastischen Membran derart dichtend abgeschlossen, daß bei Nachlassen des Drucks auf die Schreibspitze, die Membran in ihre Ausgangsposition zurückkehrt und das Ventilglied zurück in den Ventilsitz zieht.Out GB 2 310 592 For example, a marker is known which has a valve for controlling the flow from a reservoir into a delivery channel. The delivery channel extends through a delivery member to a marker tip. The delivery member is retractable to open the valve when the marker tip is pressed against a surface. An auxiliary chamber is provided between the ball valve member and the feeding member. The pre-chamber is sealed with an elastic membrane so that upon release of pressure on the writing tip, the membrane returns to its original position and pulls the valve member back into the valve seat.

Aus DE 40 15 586 C3 ist ein Gerät zum Auftragen von Schreib-, Zeichen-, Druck- oder Malflüssigkeit und dergleichen bekannt, das einen Flüssigkeitsbehälter, eine Schreibspitze und ein Luftzuführrohr besitzt, das den Behälterinnenraum mit der äußeren Atmosphäre verbindet. Zusätzlich ist ein als Flüssigkeitsfördereinrichtung ausgebildeter kapillarer Flüssigkeitsspeicher vorgesehen. Die Flüssigkeitsfördereinrichtung erstreckt sich bei dem bekannten Gerät vollständig durch den Behälterinnenraum. Das Luftzuführrohr ist zusätzlich mit kapillarem Material gefüllt, um einen Austritt von Flüssigkeit über das Rohr zu verhindern.Out DE 40 15 586 C3 For example, there is known an apparatus for applying writing, drawing, printing or painting liquid and the like, which has a liquid container, a writing tip and an air supply tube which connects the container interior with the external atmosphere. In addition, a designed as a liquid conveyor capillary liquid storage is provided. The liquid delivery device extends in the known device completely through the container interior. The air supply tube is additionally filled with capillary material to prevent leakage of fluid through the tube.

Aus US 2 624 902 A ist ein Marker bekannt, der ein Reservoir, ein Ventil, einen Durchflußbegrenzer und eine Luftleitung besitzt, wobei der Durchflußbegrenzer stromabwärts von dem Ventil vorgesehen ist und die Luftleitung nicht in das Reservoirinnere hineinreicht, sondern am Reservoirrand gelegen ist.Out US 2 624 902 A For example, a marker is known which has a reservoir, a valve, a flow restrictor and an air line, the flow restrictor being provided downstream of the valve and the air line not extending into the reservoir interior but being located on the reservoir rim.

Aus US 6,575,650 B1 ist ein Stift bekannt, bei dem der Tintenaustrag über ein Ventil erfolgt. Eine Schreibspitze ist längsverschieblich in dem vorderen Teil des Stiftes angeordnet. Während des Schreibens wird die Schreibspitze zurückgeschoben und das Ventil öffnet, so daß Tinte der Schreibspitze zugeführt werden kann. Gleichzeitig verschließt ein Kopf der zurückgeschobenen Schreibspitze den Zufluß an Tinte zu dem Ventil, so daß nur eine vorbestimmte Menge an Tinte der Schreibspitze zugeführt wird. Ist diese Menge an Tinte aufgebraucht, so muß der Stift abgesetzt werden, damit das Ventil wieder geschlossen wird und Tinte bis zu dem Ventil nachfließen kann.Out US 6,575,650 B1 a pen is known in which the ink discharge takes place via a valve. A writing tip is arranged longitudinally displaceable in the front part of the pen. During writing, the writing tip is pushed back and the valve opens so that ink can be supplied to the writing tip. At the same time, a head of the retracted writing tip closes the flow of ink to the valve so that only a predetermined amount of ink is supplied to the writing tip. If this amount of ink is used up, the pen must be discontinued, so that the valve is closed again and ink can flow up to the valve.

Aus WO 93/05966 ist ein Schreibgerät bekannt, dessen Reservoir über eine Durchgangsbohrung mit der Umgebung in Verbindung steht. Die Schreibflüssigkeit ist mit einem beweglichen Stopfen gegenüber der Durchgangsbohrung abgedichtet.Out WO 93/05966 is a writing instrument known, the reservoir communicates via a through hole with the environment. The writing fluid is sealed with a movable plug opposite the through-hole.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein auslaufsicheres Schreibgerät bereitzustellen, das mit einfachen Mitteln einen kontinuierlichen Schreibfluß schafft.The present invention has for its object to provide a leak-proof writing instrument that creates a simple Schreibfluß with simple means.

Erfindungsgemäß wird die Aufgabe durch ein Schreibgerät mit den, Merkmalen gemäß Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen bilden die Gegenstände der Unteransprüche.According to the invention the object is achieved by a writing instrument with the features according to claim 1. Advantageous embodiments form the subject of the dependent claims.

Das erfindungsgemäße Schreibgerät ist für Tinten geeignet. Die Erfindung ist jedoch keineswegs auf die Anwendung bei Tinten begrenzt, sondern kann für beliebige Schreibflüssigkeiten angewendet werden, insbesondere auch für Lacke, sowie Schreibflüssigkeiten mit oder ohne Pigmente. Das Schreibgerät besitzt ein geschlossenes Reservoir für die Schreibflüssigkeit, das mit einer Austrittsöffnung für die Schreibflüssigkeit und einer weiteren Öffnung versehen ist. In dem Reservoir liegt die Tinte als freie Flüssigkeit vor, sogenanntes free ink system. Ferner besitzt das Schreibgerät eine längliche Schreib- oder Markierungsspitze, die über einen Verbindungsweg mit dem Reservoir verbunden ist und entlang ihrer Längsachse verschieblich gelagert ist. Die als Schreib- und/oder Markierungsspitze ausgebildete Spitze des Schreibgerätes wird zur Vereinfachung nachfolgend als Schreibspitze bezeichnet. Der Verbindungsweg verbindet über die Austrittsöffnung das Reservoir mit der Schreibspitze. Ferner ist in dem Schreibgerät ein Ventil vorgesehen, das in dem Flüssigkeitskanal angeordnet ist. Das Ventil wirkt mit der Schreibspitze derart zusammen, daß bei einer Kraft in Richtung Reservoir auf die Schreibspitze das Ventil den Flüssigkeitskanal öffnet. Bei geöffnetem Ventil ist der Verbindungsweg frei und Schreibflüssigkeit tritt aus dem Reservoir in die Schreibspitze ein. Die weitere Öffnung in dem Reservoir ist über eine Luftleitung mit der Umgebung verbunden. Durch das geöffnete Ventil in dem Verbindungsweg wird ein kontinuierlicher Fluß an Schreibflüssigkeit in die Schreibspitze sichergestellt. Die Luftleitung zur Verbindung mit der Umgebung, vermeidet, daß der Schreibfluß stockt, weil sich ein Unterdruck in dem Reservoir durch die austretende Schreibflüssigkeit gebildet hat. Ferner dient die Luftleitung auch zu einem Druckausgleich, wenn es beispielsweise durch Temperaturänderungen zu einer Volumenänderung in dem Reservoir kommt. Hierdurch ist das Schreibgerät im hohen Maße auslaufsicher. Die zum Öffnen des Ventils notwendige Kraft beträgt 0,05 N bis 5 N, bevorzugt 0,1 N bis 0,4 N. In einer besonders bevorzugten Ausgestaltung entspricht die Kraft, die zum Öffnen des Ventils notwendig ist, bereits der durch Aufsetzen auf einen Untergrund verursachten Gewichtskraft des Schreibgeräts.The writing instrument according to the invention is suitable for inks. However, the invention is by no means limited to the use of inks, but can be used for any writing fluids, especially for paints, as well as writing fluids with or without pigments. The writing instrument has a closed reservoir for the writing fluid, which is provided with a discharge opening for the writing fluid and another opening. In the reservoir the ink is present as a free liquid, so-called free ink system. Furthermore, the writing instrument has an elongated writing or marking tip, which is connected via a connecting path with the reservoir and is displaceably mounted along its longitudinal axis. The designed as a writing and / or marking tip of the writing instrument is referred to as a writing tip for simplicity. The connection path connects via the outlet opening the reservoir with the writing tip. Further, a valve is provided in the writing instrument, which is arranged in the liquid channel. The valve cooperates with the writing tip such that upon a force in the direction of the reservoir on the writing tip, the valve opens the fluid channel. When the valve is open, the connection path is free and writing fluid enters the writing tip from the reservoir. The further opening in the reservoir is connected via an air line with the environment. The open valve in the communication path ensures a continuous flow of writing fluid into the writing tip. The air line for connection to the environment avoids that the write flow ceases because a negative pressure in the reservoir has formed by the exiting writing fluid. Furthermore, the air line also serves to equalize the pressure when, for example, changes in temperature lead to a change in volume in the reservoir. As a result, the writing instrument is leak-proof to a high degree. The force required to open the valve is 0.05 N to 5 N, preferably 0.1 N to 0.4 N. In a particularly preferred embodiment, the force that is necessary to open the valve already corresponds to that by placing it on a Underground caused weight of the writing instrument.

Ein Durchflußbegrenzer ist zwischen Reservoir und Schreibspitze vorgesehen. Der Durchflußbegrenzer ist dabei derart dimensioniert, daß ein kontinuierlicher Schreibfluß für die vorgesehene Schreibflüssigkeit entsteht. Da die Schreibflüssigkeit in dem Reservoir stets Atmosphärendruck ausgesetzt ist, kann der Durchflußbegrenzer deutlich genauer dimensioniert werden, als bei Schreibgeräten, bei denen die Schreibflüssigkeit unterschiedlichen Drücken ausgesetzt ist. Der Durchflußbegrenzer ist beispielsweise als ein Kanalabschnitt mit geringem Durchmesser ausgebildet. Das Ventil kann bevorzugt eine biegbare Ventilplatte aufweisen, die dichtend an einer Halterung anliegt. Die Schreibspitze ist an der Ventilplatte befestigt, wobei durch den Druck auf die Schreibspitze die Ventilplatte aus der dichtenden Stellung gedrückt wird und Schreibflüssigkeit aus dem Reservoir über den Durchflußbegrenzer nachströmen kann.A flow restrictor is provided between the reservoir and the writing tip. The flow restrictor is dimensioned such that a continuous write flow for the intended writing fluid is formed. Since the writing fluid in the reservoir is always exposed to atmospheric pressure is, the flow restrictor can be dimensioned much more accurate than in writing instruments in which the writing fluid is exposed to different pressures. The flow restrictor is designed, for example, as a small-diameter passage section. The valve may preferably have a bendable valve plate, which bears sealingly against a holder. The writing tip is attached to the valve plate, wherein the valve plate is pressed out of the sealing position by the pressure on the writing tip and writing fluid can flow from the reservoir via the flow restrictor.

Zusätzlich kann in einer bevorzugten Ausgestaltung zwischen Ventil und Schreibspitze ein kapillarer Ausgleichsspeicher vorgesehen werden. Der kapillare Ausgleichsspeicher dient dazu, überschüssige Tinte, die beispielsweise vor einem Schließen des Ventils noch durchgetreten ist, aber nicht mehr benötigt wird, aufzunehmen und zu speichern. Der kapillare Ausgleichsspeicher ist derart angeordnet, daß Tinte aus der Luftleitung ebenfalls von dem Ausgleichsspeicher aufgenommen wird.In addition, in a preferred embodiment, a capillary compensation reservoir can be provided between valve and writing tip. The capillary compensation memory serves to absorb and store excess ink, which has still been passed, for example, before the valve is closed, but is no longer needed. The capillary balance memory is arranged such that ink from the air line is also received by the balance memory.

Die in den Innenraum des Reservoirs führende Luftleitung ist bevorzugt als ein starres Rohrelement ausgebildet. Wobei die Luftleitung bevorzugt in einem Volumenmittelpunkt des Behälters mündet. Der Volumenmittelpunkt liegt bei rotationssymmetrischem Tintenreservoir beispielsweise auf der Symmetrieachse auf halber Höhe, wobei das Reservoir weniger als die Hälfte gefüllt ist.The leading into the interior of the reservoir air duct is preferably formed as a rigid tubular element. Wherein the air duct preferably opens in a volume center of the container. The volume center is at rotationally symmetrical ink reservoir, for example, on the axis of symmetry at half height, wherein the reservoir is filled less than half.

Um den Austritt von Schreibflüssigkeit über die Luftleitung weitestgehend auszuschließen ist die Mündung der Luftleitung derart im Reservoir angeordnet, daß es zu einer vorbestimmten Füllmenge des Reservoirs stets in sämtlichen Positionen mit der Umgebung verbunden ist. Damit eine solche Position für die Luftleitung existiert, darf das Reservoir nicht mehr als zur Hälfte mit Schreibflüssigkeit gefüllt sein, bevorzugt ist es weniger als zur Hälfte mit Schreibflüssigkeit gefüllt.In order to exclude the exit of writing fluid via the air line as far as possible, the mouth of the air line is arranged in the reservoir so that it is always connected to a predetermined amount of the reservoir in all positions with the environment. For such a position exists for the air line, the reservoir may not be more than half filled with writing fluid, preferably less than half filled with writing fluid.

In einer besonders zweckmäßigen Ausgestaltung besitzt das Reservoir eine ungefähr zylindrische Form, wobei die Austrittsöffnung des Reservoirs und die weitere Öffnung bevorzugt an dem Grund des Reservoirs vorgesehen sind.In a particularly expedient embodiment, the reservoir has an approximately cylindrical shape, wherein the outlet opening of the reservoir and the further opening are preferably provided at the bottom of the reservoir.

In einer zweckmäßigen Ausgestaltung ist das Ventil in seine schliessende Position vorgespannt und öffnet sobald eine vorbestimmte Kraft von der Schreibspitze auf das Ventilglied übertragen wird. Der Durchflußbegrenzer kann als Kanal mit vermindertem Durchmesser und entsprechender Länge ausgebildet sein.In an expedient embodiment, the valve is biased into its closing position and opens as soon as a predetermined force is transmitted from the writing tip to the valve member. The flow restrictor may be formed as a channel of reduced diameter and length.

Um einen kontinuierlichen Fluß an Schreibflüssigkeit sicherzustellen, ist der Durchflußbegrenzer derart bemessen, daß bei einer nach unten weisenden Spitze die Schreibflüssigkeit in einer Menge durchtritt, wie für einen regulären Schreibfluß erforderlich. Der Durchflußbegrenzer ist also für die reguläre Schreib-, Mal-, Zeichen- und Markierfunktion ausgelegt. Im Gegensatz zu anderen free-ink-Systemen, wird die Schreibflüssigkeit nicht über die Adhäsionskraft der Schreibunterlage aus dem Reservoir gesaugt, sondern fließt im wesentlichen unter Einfluß der Schwerkraft zur Schreibspitze.To ensure a continuous flow of writing fluid, the flow restrictor is dimensioned such that, with a downwardly pointing tip, the writing fluid passes in an amount as required for a regular writing flow. The flow restrictor is thus designed for the regular writing, painting, drawing and marking functions. In contrast to other free-ink systems, the writing fluid is not sucked through the adhesive force of the writing pad from the reservoir, but flows substantially under the influence of gravity to the writing tip.

Bevorzugt wird der Hub auf 0,01 bis 0,4 mm, vorzugsweise auf 0,05 bis 0,25 mm begrenzt. Der Hub soll ebenso wie die zum Öffnen notwendige Kraft des Ventils so gering sein, daß ein Benutzer das Öffnen des Ventils nicht bemerkt.Preferably, the stroke is limited to 0.01 to 0.4 mm, preferably to 0.05 to 0.25 mm. The stroke should be as small as the force required to open the valve so low that a user does not notice the opening of the valve.

Mehrere Ausführungsbeispiele für das erfindungsgemäße Schreibgerät werden nachfolgend an einem Ausführungsbeispiel näher erläutert. Es zeigt:

Fig. 1
einen Querschnitt durch ein erstes Ausführungsbeispiel,
Fig. 2
einen Querschnitt durch ein zweites Ausführungsbeispiel,
Fig. 3
ein alternatives Ausführungsbeispiel des Ventils in einer Querschnittszeichnung,
Fig. 4
ein weiteres Ausführungsbeispiel für das Ventil in einer Querschnittszeichnung,
Fig. 5
ein weiteres Ausführungsbeispiel mit einer biegbaren Ventilplatte.
Several embodiments of the writing instrument according to the invention are explained below using an exemplary embodiment. It shows:
Fig. 1
a cross section through a first embodiment,
Fig. 2
a cross section through a second embodiment,
Fig. 3
an alternative embodiment of the valve in a cross-sectional drawing,
Fig. 4
another embodiment of the valve in a cross-sectional drawing,
Fig. 5
a further embodiment with a bendable valve plate.

Figur 1 zeigt in einer schematischen Ansicht ein als Marker ausgebildete Schreibgerät. Bei dem Schreibgerät kann es sich beispielsweise um einen Lackmarker handeln. Das Schreibgerät besitzt ein Reservoir 10, das eine Tinte 12 enthält. Das Reservoir 10 muß nicht zwangsläufig den Körper des Stifts bilden. Vielmehr ist es auch denkbar, einen Stiftkörper vorzusehen, in dem das Reservoir 10 angeordnet ist. Das Reservoir 10 wird in dem dargestellten Ausführungsbeispiel durch eine Bodenplatte 14 begrenzt, während die Außenwand des Reservoirs 10 sich über die Bodenplatte 14 hinaus bis zur Schreibspitze erstreckt. FIG. 1 shows a schematic view of a designed as a marker writing instrument. The writing instrument may, for example, be a paint marker. The writing instrument has a reservoir 10 containing an ink 12. The reservoir 10 does not necessarily form the body of the pen. Rather, it is also conceivable to provide a pen body in which the reservoir 10 is arranged. The reservoir 10 is limited in the illustrated embodiment by a bottom plate 14, while the outer wall of the reservoir 10 extends beyond the bottom plate 14 also to the writing tip.

Die Bodenplatte 14 besitzt eine exzentrisch angeordnete Luftöffnung 16, auf die eine Luftleitung 18 aufgesetzt ist. Die Luftleitung 18 erstreckt sich in einem ersten Abschnitt parallel zur Längsachse des Reservoirs 10. Im Bereich ihrer Mündung 20 knickt die Luftleitung 18 ab und endet im Volumenmittelpunkt des Reservoirs 10. Der Volumenmittelpunkt bezeichnet hierbei den Punkt, der bei einem etwas weniger als halb gefüllten Reservoir stets frei liegt und in keiner Position des Reservoirs mit Flüssigkeit bedeckt ist. Bei einem Zylinder ist der Volumenmittelpunkt beispielsweise der Mittelpunkt des Zylinders, so daß ein etwas weniger als halb gefüllter Zylinder in keiner Position den Volumenmittelpunkt bedeckt.The bottom plate 14 has an eccentrically arranged air opening 16, on which an air line 18 is placed. The air duct 18 extends in a first section parallel to the longitudinal axis of the reservoir 10. In the region of its mouth 20, the air duct 18 kinks and ends in the volume center of the reservoir 10. The volume center here denotes the point that at a slightly less than half-filled reservoir is always exposed and is not covered in any position of the reservoir with liquid. For example, in a cylinder, the volume center is the center of the cylinder so that a cylinder less than half full will not cover the center of mass in any position.

Die Bodenplatte 14 besitzt ferner eine zentrale Öffnung 22, die in einen Flüssigkeitskanal mündet. Der Flüssigkeitskanal 24 als Verbindungsweg zwischen Reservoir und Schreibspitze verläuft in dem dargestellten Beispiel zentral durch das Schreibgerät. Unmittelbar an die Bodenplatte 14 schließt sich ein Durchflußbegrenzer 26 an. Der Durchflußbegrenzer 26 verengt den Durchtrittskanal auf einen Querschnitt derart, daß ein Fluß an Schreibflüssigkeit entsteht, der dem regulären Schreibfluß entspricht. Der Durchflußbegrenzer ist nach Art einer Drossel von der Schreibspitze angeordnet und begrenzt den Volumenstrom an Schreibflüssigkeit aus dem Reservoir. Die weitere bestimmende Größe für die Durchflußmenge ist die Länge der Kapillare, die ebenfalls auf die gewünschte Durchflußmenge abgestimmt ist.The bottom plate 14 also has a central opening 22, which opens into a fluid channel. The liquid channel 24 as a communication path between the reservoir and writing tip runs in the illustrated example centrally through the writing instrument. Immediately to the bottom plate 14, a flow restrictor 26 connects. The Durchflußbegrenzer 26 narrows the passageway to a cross section such that a flow of writing fluid is formed, which corresponds to the regular Schreibfluß. The flow restrictor is arranged in the manner of a throttle from the writing tip and limits the volume flow of writing fluid from the reservoir. The further determining factor for the flow rate is the length of the capillary, which is also tuned to the desired flow rate.

Nachfolgend zu dem Durchflußbegrenzer 26 ist ein Ventil 28 vorgesehen, das in seiner verschlossenen Position den Durchfluß an Schreibflüssigkeit sperrt. Das Ventil 28 ist als Ventil mit Ventilglied und Ventilsitz ausgebildet, wobei das Ventilglied mit der Markerspitze 30 verbunden ist. Die Markerspitze 30 bewegt das Ventilglied aus dem Ventilsitz und gibt so den Durchfluß an Schreibflüssigkeit aus dem Durchflußbegrenzer in die Schreibspitze 30 frei. Ferner ist das Ventil mit elastischen Rückstellmitteln (nicht dargestellt) ausgestattet, die eine rückstellende Kraft auf das Ventilglied und somit die Schreibspitze ausüben.Subsequent to the flow restrictor 26, a valve 28 is provided which blocks the flow of writing fluid in its closed position. The valve 28 is designed as a valve with valve member and valve seat, wherein the valve member is connected to the marker tip 30. The marker tip 30 moves the valve member out of the valve seat and thus releases the flow of writing fluid from the flow restrictor into the writing tip 30. Furthermore, the valve is elastic Return means (not shown) equipped, which exert a restoring force on the valve member and thus the writing tip.

Die Schreibspitze 30 steht an ihrem entfernten Ende aus dem Gehäuse 32 vor. An dem innen liegendem Ende der Schreibspitze 30 ist ein Ausgleichsspeicher 34 vorgesehen, der überschüssige Schreibflüssigkeit aufnimmt. Der Hub h, der zur vollständigen Betätigung des Ventils notwendig ist, beträgt bevorzugt 0,2 mm oder weniger. Die dafür notwendige Kraft beträgt 0,2 N.The writing tip 30 protrudes from the housing 32 at its distal end. At the inner end of the writing tip 30, a compensating memory 34 is provided which receives excess writing fluid. The stroke h, which is necessary for the complete actuation of the valve, is preferably 0.2 mm or less. The necessary force is 0.2 N.

Fig. 2 zeigt einen Querschnitt durch eine zweite Ausführungsform eines erfindungsgemäßen Schreibgerätes. Eine Wand 36 umgrenzt ein Reservoir 38, in dem eine Schreibflüssigkeit 40 vorgesehen ist. Der Boden des Reservoirs 38 wird durch ein Bodenelement 42 begrenzt, das eine zentrale Entlüftungsöffnung 44 besitzt. Die Lüftungsöffnung 44 befindet sich in einem Entlüftungskanal 46, der durch ein Entlüftungsrohr 48 begrenzt ist. Das Entlüftungsrohr 48 steht zentral in das Reservoir 38 vor und besitzt an seinem freien Ende eine Öffnung 50, die den Reservoirinnenraum 38 mit dem Lüftungskanal 46 verbindet. Unterhalb der Bodenplatte 42 verläuft der Entlüftungskanal 44 abgewinkelt und führt in den Bereich der Schreibspitze, wo ein Ringspalt 52 zur Verbindung mit der Umgebung vorgesehen ist. Der Ringspalt 52 ist durch einen Zwischenraum zwischen der Schreibspitze 54 und den zugehörigen Wandabschnitt 56 des Schreibgerätes gebildet. Über den Lüftungskanal 46 steht der Reservoirinnenraum 38 mit der Umgebung in Verbindung und es erfolgt ein Druckausgleich. Fig. 2 shows a cross section through a second embodiment of a writing instrument according to the invention. A wall 36 defines a reservoir 38 in which a writing fluid 40 is provided. The bottom of the reservoir 38 is bounded by a bottom member 42 having a central vent 44. The ventilation opening 44 is located in a ventilation channel 46, which is delimited by a vent pipe 48. The vent tube 48 projects centrally into the reservoir 38 and has at its free end an opening 50 which connects the reservoir interior 38 with the ventilation duct 46. Below the bottom plate 42, the vent channel 44 extends at an angle and leads into the region of the writing tip, where an annular gap 52 is provided for connection to the environment. The annular gap 52 is formed by a gap between the writing tip 54 and the associated wall portion 56 of the writing instrument. About the ventilation duct 46 of the reservoir interior 38 is in communication with the environment and there is a pressure compensation.

Das Bodenelement 42 besitzt eine zweite Öffnung 58, die das Reservoir 38 für die Schreibflüssigkeit 40 mit einer Vorkammer 60 verbindet. Die Vorkammer 60 besitzt eine Austrittsöffnung 61, die in einem Halteelement 62 gebildet ist. An die Austrittsöffnung 61 schließt sich ein als Röhrchen ausgebildeter Durchflußbegrenzer 64 an, durch das die Schreibflüssigkeit 40 aus der Vorkammer 60 geleitet wird. Der Durchflußbegrenzer 64 beschränkt die Durchflußmenge, die durch den kleineren Querschnitt der Öffnung und die Länge des Röhrchens fließt.The bottom element 42 has a second opening 58, which connects the reservoir 38 for the writing fluid 40 with an antechamber 60. The pre-chamber 60 has an outlet opening 61, which is formed in a holding element 62. At the outlet opening 61, a flow restrictor 64 formed as a tube closes on, through which the writing fluid 40 is passed from the antechamber 60. The flow restrictor 64 limits the flow rate that flows through the smaller cross section of the opening and the length of the tube.

Stromabwärts von dem Durchflußbegrenzer ist das Ventil mit Ventilglied 66 und ringförmiger Ventilsitz 68 vorgesehen. Das Ventilglied 66 besitzt auf seiner von dem Ventil abgewandten Seite Vertiefungen 67, die einen Fluß der Schreibflüssigkeit bei geöffnetem Ventil erlauben. Eine Spiralfeder 70 ist um den Durchflußbegrenzer 64 angeordnet und stützt sich an dem Bodenelement 42 ab.Downstream of the flow restrictor, the valve with valve member 66 and annular valve seat 68 is provided. The valve member 66 has on its side facing away from the valve side recesses 67 which allow a flow of the writing fluid with the valve open. A coil spring 70 is disposed about the flow restrictor 64 and is supported on the bottom member 42.

Der Ventilsitz 68 ist als ein umlaufender Vorsprung gebildet, der auf einem separaten Bauteil 72 ausgebildet ist. Das Bauteil 72 für den Ventilsitz 68 ist in eine zentrale Ausnehmung eines Ansatzes 74 eingesetzt, wobei der Ansatz einstückig mit der Bodenplatte 42 ausgebildet sein kann.The valve seat 68 is formed as a circumferential projection formed on a separate component 72. The member 72 for the valve seat 68 is inserted into a central recess of a lug 74, wherein the lug may be formed integrally with the bottom plate 42.

Die Markierspitze 54 ist mit dem als Ventilstößel ausgebildeten Ventilglied 66 verbunden. Um die Markierspitze 54 herum ist ein kapillarer Ausgleichspeicher 76 angeordnet.The marking tip 54 is connected to the valve member 66 designed as a valve tappet. Around the marking tip 54, a capillary balance memory 76 is disposed.

Die Markierspitze 54 steht zentral aus der Spitze des Schreibgeräts vor. Etwaige Schreibflüssigkeit, die in den Entlüftungskanal 46 gelangt ist, wird im Bereich der Wandung 56 über den Kapillarspeicher der Markierspitze zugeführt, so daß ein Auslaufen wirkungsvoll verhindert wird.The marker tip 54 protrudes centrally from the tip of the writing instrument. Any writing fluid that has entered the venting channel 46 is supplied in the region of the wall 56 via the capillary storage of the marking tip, so that leakage is effectively prevented.

Fig. 3 zeigt eine alternative Ausgestaltung der Durchflußbegrenzung. Hier ist ein Bodenelement 78 vorgesehen, in dem ein wendelförmiger Austrittskanal 80 gebildet ist. Der Austrittskanal 80 verläuft in dem Element 78 entlang der Außenseite, so daß dieser nach Außen hin von der Innenwand 82 der Aufnahmeöffnung für das Element 78 begrenzt ist. Eine Feder 84 drückt in der dargestellten Position den Ventilstößel 86 und die Schreibspitze in die verschlossene Position. Der Ventilstößel 86 ist mit Ausnehmungen 87 versehen, die einen Durchfluß von Schreibflüssigkeit auch bei zurückgeschobenen Ventilstößel erlauben. Fig. 3 shows an alternative embodiment of the flow restriction. Here, a bottom element 78 is provided, in which a helical outlet channel 80 is formed. The exit channel 80 extends in the element 78 along the outside, so that this outwardly from the inner wall 82 of the receiving opening for the element 78 is limited. A spring 84 presses in the position shown, the valve stem 86 and the writing tip in the closed position. The valve stem 86 is provided with recesses 87 which allow a flow of writing fluid even when pushed back valve lifter.

Fig. 4 zeigt eine alternative Ausgestaltung des Ventils, bei dem das Ventilglied durch einen Rollerball 88 gebildet ist. Der Rollerball 88 sitzt in einer Spitze 90, die einen zentralen Führungskanal 92 für den Rollerball 88 besitzt. Durch eine Verengung des Querschnitts in dem freien Ende des Führungskanals wird der Rollerball 88 in diesem gehalten. Eine Spiralfeder 94 drückt den Rollerball in seine geschlossene Position. Die Bewegung des Rollerballs 88 in dem Führungskanal 92 wird in der gegenüberliegenden Richtung durch einen Anschlag 96 begrenzt. Der Abstand zwischen Rollerball 88 und Anschlag 96 in der geschlossenen Position des Rollerballs definiert den maximalen Hub des Rollerballs. Über einen Docht 98 wird dem Rollerball 88 die Schreibflüssigkeit zugeführt. Fig. 4 shows an alternative embodiment of the valve, wherein the valve member is formed by a rollerball 88. The rollerball 88 is seated in a point 90 which has a central guide channel 92 for the rollerball 88. By a narrowing of the cross section in the free end of the guide channel of the rollerball 88 is held in this. A coil spring 94 pushes the rollerball into its closed position. The movement of the roller ball 88 in the guide channel 92 is limited in the opposite direction by a stop 96. The distance between roller ball 88 and stop 96 in the closed position of the roller ball defines the maximum stroke of the roller ball. About a wick 98 the rollerball 88, the writing fluid is supplied.

Fig. 5 zeigt eine weitere Ausgestaltung des erfindungsgemäßen Schreibgeräts im Querschnitt. Das Schreibgerät besitzt ein Flüssigkeitsreservoir 112, das weniger als die Hälfte mit einer Schreibflüssigkeit 114 gefüllt ist. Zentral in das Reservoir 112 steht eine Luftleitung 116 vor, die über einen Luftkanal 118 mit der Umgebung in Verbindung steht. Die Luftleitung 116 steht hierbei von dem unteren Ende in das Reservoir 112 vor. Der Luftkanal 118 ist über einen ringförmigen Spalt 120 mit der Umgebung verbunden. Der ringförmige Spalt wird nach außen durch einen ringförmigen Gehäuseabschnitt 122 begrenzt. Nach innen wird der ringförmige Spalt 120 durch die Faserspitze 124 begrenzt. Der besondere Vorteil ist hierbei darin zu sehen, daß etwaige in die Luftleitung und den Luftkanal 118 gelangende Schreibflüssigkeit beim Durchtritt durch den Luftspalt durch die Markerspitze 124 aufgesogen werden kann. Hierdurch wird ein unnötiger Austritt an Tinte vermieden. Fig. 5 shows a further embodiment of the writing instrument according to the invention in cross section. The writing instrument has a liquid reservoir 112 which is less than half filled with a writing fluid 114. Central to the reservoir 112 is an air duct 116, which communicates with the environment via an air duct 118. The air line 116 protrudes from the lower end into the reservoir 112. The air channel 118 is connected via an annular gap 120 with the environment. The annular gap is bounded outwardly by an annular housing portion 122. Inwardly, the annular gap 120 is bounded by the fiber tip 124. The particular advantage here is to be seen in the fact that any reaching into the air line and the air channel 118 writing fluid can be absorbed as it passes through the air gap by the marker tip 124. This avoids unnecessary leakage of ink.

Die Schreibflüssigkeit 114 gelangt über eine Öffnung 126 in den kanalförmigen Durchflußbegrenzer 128. Der Durchflußbegrenzer 128 besitzt eine Länge und einen Durchmesser, die derart gewählt sind, daß der Durchfluß an Schreibflüssigkeit dem gewünschten Schreibfluß an der Schreibspitze entspricht. Der Durchflußbegrenzer 128 erstreckt sich in einen ringförmigen Ventilraum 130. Der Ventilraum 130 wird durch eine elastische Ventilplatte 132 abgedichtet. Die Ventilplatte 132 besitzt einen zentralen Halteabschnitt 134, in den die Faserspitze 124 eingesetzt ist. Die elastische Ventilplatte 132 wirkt mit einem Wulst 136 zusammen. Der Wulst ist ringförmig um einen Führungskanal 138 auf eine Ventilsitzplatte 140 ausgebildet. Der Führungskanal 138 dient zugleich als Führung für die Faserspitze 124. In der geöffneten Position, also der Position, in der eine einwärts gerichtete Kraft auf die Faserspitze 124 wirkt, wird die Ventilplatte 132 zurückgebogen und es bildet sich ein ringförmiger Spalt zwischen dem Wulst 136 und der Platte 132.The writing fluid 114 passes through an opening 126 in the channel-shaped Durchflußbegrenzer 128. The flow restrictor 128 has a length and a diameter which are selected such that the flow of writing fluid corresponds to the desired write flow at the writing tip. The flow restrictor 128 extends into an annular valve space 130. The valve space 130 is sealed by an elastic valve plate 132. The valve plate 132 has a central holding portion 134 into which the fiber tip 124 is inserted. The elastic valve plate 132 cooperates with a bead 136. The bead is annular around a guide channel 138 is formed on a valve seat plate 140. The guide channel 138 also serves as a guide for the fiber tip 124. In the open position, ie the position in which an inwardly directed force acts on the fiber tip 124, the valve plate 132 is bent back and it forms an annular gap between the bead 136 and the plate 132.

Neben der Durchflußbegrenzung durch das Zusammenwirken der Wulstlippe 136 und der elastischen Ventilplatte 132 findet, wie bereits erwähnt, ebenfalls eine Durchflußbegrenzung durch den Kanalabschnitt 128 statt. Wie in Fig. 5 deutlich zu erkennen, verringert sich der Durchmesser des Austrittskanals, so daß eine Begrenzung des Durchfluß es erfolgt.In addition to the flow limitation by the interaction of the bead lip 136 and the elastic valve plate 132 is, as already mentioned, also a flow restriction through the channel portion 128 instead. As in Fig. 5 clearly recognizable, the diameter of the outlet channel decreases, so that there is a limitation of the flow.

Claims (13)

  1. A writing utensil for a free-flowing writing fluid, comprising
    - a closed reservoir (10; 38) with the writing fluid (12; 40) therein that has an outlet aperture (22; 58) for the writing fluid and a further aperture (16; 44),
    - an elongate writing tip (30; 54) which communicates with the outlet aperture (22; 58) of the reservoir (10; 38) and is slidably supported, and
    - a valve (28; 66, 68; 86; 88, 90) which is disposed inside a communicating path between the writing tip and reservoir and interacts with the writing tip so as to cause the valve to open the communicating path if a force acts onto the writing tip,
    - wherein the further aperture connects the reservoir with the surroundings via an air line (18; 48),
    characterized in that
    - a flow limiter (26) is provided inside the communicating path between the reservoir and writing tip upstream of the valve, and
    - the air line is disposed inside the reservoir such that the air inside the reservoir always is in communication with the surroundings via the air line in all of the positions up to a predetermined filling volume.
  2. The writing utensil according to claim 1, characterized in that the minimum force necessary to open the valve is from 0.05N to 5N.
  3. The writing utensil according to claim 2, characterized in that the minimum force necessary to open the valve is from 0.1N to 0.3N, preferably 0.2N.
  4. The writing utensil according to claim 1, characterized in that a capillary balance tank (34) is provided between the valve (28) and writing tip (30).
  5. The writing utensil according to any one of claims 1 to 4, characterized in that the air line has a substantially rigid tube element.
  6. The writing utensil according to any one of claims 1 to 5, characterized in that the air line has its mouth into the volume centre of the reservoir.
  7. The writing utensil according to any one of claims 1 to 6, characterized in that the reservoir is of an approximately cylindrical shape.
  8. The writing utensil according to any one of claims 1 to 7, characterized in that the reservoir has a bottom in which the outlet aperture and a further aperture are provided.
  9. The writing utensil according to any one of claims 1 to 8, characterized in that the valve (28), when in a closing position, is biased and opens, starting at a minimum force acting onto the writing tip.
  10. The writing utensil according to any one of claims 1 to 9, characterized in that the writing tip is slidably supported within an area of lift for the actuation of the valve.
  11. The writing utensil according to claim 10, characterized in that the writing tip (30) has a lift of from 0.01 to 0.4mm, preferably 0.05 to 0.2mm.
  12. The writing utensil according to any one of claims 1 to 11, characterized in that a tubular flow limiter (128) is provided inside the communicating path between the reservoir and writing tip.
  13. The writing utensil according to any one of claims 1 to 12, characterized in that an elastic valve plate (132) centrally carries a writing tip which, when acted on by writing pressure, pushes the valve plate out of the valve seat.
EP06753550A 2005-05-14 2006-05-10 Writing implement for painting, drawing and marking Active EP1896267B1 (en)

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DE102005022462A DE102005022462B4 (en) 2005-05-14 2005-05-14 writing implement
PCT/EP2006/004393 WO2006122693A2 (en) 2005-05-14 2006-05-10 Writing implement for painting, drawing and marking

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DE102009053291B4 (en) * 2009-11-13 2015-11-05 Edding Ag Paint pen and cap for a paint pen
JP2011148203A (en) * 2010-01-22 2011-08-04 Brother Industries Ltd Ink cartridge
JP5687529B2 (en) * 2010-03-26 2015-03-18 株式会社サクラクレパス Applicator
WO2020184559A1 (en) * 2019-03-14 2020-09-17 株式会社３Ｓ Applicator
CN112721495B (en) * 2021-01-20 2024-04-16 成都理工大学 Novel disposable environment-friendly pen refill

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US2624902A (en) * 1949-03-09 1953-01-13 Jack O Soldner Fountain marking device with work operable valve
US3459484A (en) * 1967-05-01 1969-08-05 Paul S Abrams Marking device
US3741668A (en) * 1971-09-30 1973-06-26 Koh I Noor Radiograph Inc Method of venting a stylographic pen
JPS62160297A (en) * 1986-01-09 1987-07-16 三菱鉛筆株式会社 Liquid applicator
DE4015586C3 (en) * 1990-05-15 1997-12-04 Dataprint Datendrucksysteme R Device for applying writing, drawing, printing or painting fluid on a surface
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CN1163589A (en) * 1994-11-14 1997-10-29 吉莱特公司 Marking instrument
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JP4180183B2 (en) * 1999-03-31 2008-11-12 パイロットインキ株式会社 Liquid writing instrument
CN2377093Y (en) * 1999-06-08 2000-05-10 戎星淼 Mark pen
CN2403581Y (en) * 2000-01-24 2000-11-01 太原市奥洁文教用品厂 Blackboard-writing pen with inner container
US6675650B1 (en) 2001-11-12 2004-01-13 Yazaki North America Automotive display
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US6575650B1 (en) * 2002-11-26 2003-06-10 Pro Eton Corporation Pressure sensed ink-filled pen
CN1465485A (en) * 2002-12-03 2004-01-07 毛志华 Universal writing plan with adjustable ink in writing end and various kinds of ink pen

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US20080193199A1 (en) 2008-08-14
WO2006122693A2 (en) 2006-11-23
CN101160217A (en) 2008-04-09
DE102005022462B4 (en) 2011-08-18
US7648297B2 (en) 2010-01-19
JP2008540178A (en) 2008-11-20
HK1119421A1 (en) 2009-03-06
DK1896267T3 (en) 2009-02-02
WO2006122693A3 (en) 2007-03-08
EP1896267A2 (en) 2008-03-12
ES2316078T3 (en) 2009-04-01
PL1896267T3 (en) 2009-04-30
JP4871354B2 (en) 2012-02-08
DE502006001704D1 (en) 2008-11-13
DE102005022462A1 (en) 2006-12-14
ATE409600T1 (en) 2008-10-15
CN100513202C (en) 2009-07-15

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