EP0891263B1 - Ink writing implement - Google Patents

Ink writing implement Download PDF

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Publication number
EP0891263B1
EP0891263B1 EP97918087A EP97918087A EP0891263B1 EP 0891263 B1 EP0891263 B1 EP 0891263B1 EP 97918087 A EP97918087 A EP 97918087A EP 97918087 A EP97918087 A EP 97918087A EP 0891263 B1 EP0891263 B1 EP 0891263B1
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EP
European Patent Office
Prior art keywords
ink
chambers
writing implement
duct
flat area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP97918087A
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German (de)
French (fr)
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EP0891263A1 (en
Inventor
Bernd Bastiansen
Petra Maurer
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Rotring International GmbH and Co KG
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Rotring International GmbH and Co KG
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Publication of EP0891263A1 publication Critical patent/EP0891263A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/18Arrangements for feeding the ink to the nibs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00Pens with writing-points other than nibs or balls
    • B43K8/02Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B43K8/04Arrangements for feeding ink to writing-points

Definitions

  • the invention relates to an ink writing device according to Preamble of claim 1.
  • Such ink pens are well known (e.g. DE-A-1 461 628, DD-A-0 151 561).
  • the annular pressure equalization chambers Shaped bodies having capillary dimensions of such Ink pens are injection molded in a jaw mold made which has two mold halves, each in Half of the form of sheet metal packages held from thin-walled sheet metal lamellae are, for example, have a thickness of 0.10 mm to 1.0 mm can.
  • the laminated core is one of the mold halves an axially extending longitudinal plate provided in the peripheral region provided by the axially in the molded body to be produced running, capillary ink guide channel, approximately in the form of a Flattening (DE-A-3 429 031) is formed from which in operation Ink enters the annular pressure equalization chamber when Overpressure occurs inside the ink pen.
  • the object of the invention is a writing instrument according to the preamble of claim 1 to improve in that without significant Manufacturing effort is achieved that the annular pressure compensation chambers of the molded body over practically their entire Circumference have a constant width.
  • a writing instrument designed according to the invention such that the Shaped body to form the ink guide channel an axially extending Has flattening and that the mold parting plane extends through this flattening.
  • the mold parting plane lies in the writing instrument according to the invention not offset by 90 ° to the radii through the center of the Ink guide channel, but in the plane of such radii, the Ink guide channel formed by flattening the molded body becomes.
  • the formation of the ink guide channel by flattening makes it possible in the mold halves to match the jaw shape radially inwardly projecting areas to be formed in the Close the jaw shape together and open the Cheek mold after performing the injection molding process and Do not hinder ejection of the molded article produced.
  • the annular pressure equalization chambers are covered by sheets of Sheet packets formed in the mold halves, each of which one side of the flat to diametrically flat extend opposite side of the molded body, so that the Sheets of the two mold halves on this opposite side collide. If there is a certain axial offset of the Sheet metal results, so this does not reduce the volume of the annular pressure equalization chambers, even if this on the Flattening opposite side not at all with each other stay in contact.
  • each mold half is a half forms such a pressure compensation chamber and each of these halves in connection with the flattening forming the ink guide channel stands, there is a connection of the entire pressure compensation chamber with the ink guide channel, without a possible Interruption in the course of the pressure compensation chamber at the Ink guide channel opposite side to a volume reduction would lead.
  • the flattening can be in the area of a formed in the molded body Partition wall that interrupts the annular spaces in the circumferential direction, the flattening being a width at least equal to that Thickness of the partition in its radially outer area has a sufficient connection between the ink guide and the to obtain annular pressure compensation chambers.
  • the mold parting line runs through the middle of the partition and the middle of the flattening.
  • the areas of the disc-shaped areas opposite the flattening Walls of the molded body can form the air duct be flattened.
  • the front end of the air duct can on one in connection with the ambient air standing annulus end.
  • the Writing tip through an in an axial through hole of the Shaped body used wick or liquid guide educated.
  • the writing instrument shown has a protruding writing tip 1, the front end of a wick or liquid guide 2 is formed, which is in an axial through hole 4 of a molded body 3 to be described and protrudes at the rear end. At the front end is the wick or liquid guide 2 is jammed in the front Section 5 of the molded body 3 held.
  • the molded body 3 is seated in a holder shaft 20, the rear closed end, in the protruding end of the wick or liquid body 2 protrudes with free writing fluid, preferably ink, which may also contain micro-color particles.
  • This writing fluid is used in the usual way a wick body 2 through its capillary structures formed in the body from the rear end to the writing tip 1 and is at Use of a non-porous liquid guide body 2 in the surface of which has capillary channels to the writing tip 1 guided.
  • the molded body 3 has in the usual manner in the circumferential direction running circular pressure equalization chambers 13 capillary Dimension limited by lateral disk-shaped walls 12 are and their chamber width, as is also known, from behind increases forward.
  • the flat 10 forms together with the enveloping Holder shaft 20 has a capillary ink guide channel 11 (FIG 1), the axially from the rear flange 8 of the molded body to a lying in front of the annular pressure equalization chambers 13 disc-shaped wall 14, which may be the front Boundary wall of the front pressure compensation chamber can be.
  • an air duct 16 is formed, which one formed between disc-shaped walls 14 and 18 Annulus 17 and another, through a disc-shaped Partition 19 interrupted annular space and an axial groove 7 in the effecting front clamping of the molded body 3 in the holder shaft 20 Section 6 of the molded body 3 in connection with the ambient air stands.
  • the molded body 3 has one Formation of the ink guide channel 11 serving flat 10, the on both sides of the partition 9 with the annular pressure compensation chambers 13 communicates.
  • a jaw mold made of two mold halves is used, those in the closed state with their parting level in level 25 lies.
  • Each of the mold halves thus contains laminated cores for formation of the annular pressure compensation chambers 13, which are in the parting plane 25 and on the partition 9 diametrically opposite Side collide.

Abstract

PCT No. PCT/EP97/01597 Sec. 371 Date May 18, 1998 Sec. 102(e) Date May 18, 1998 PCT Filed Apr. 1, 1997 PCT Pub. No. WO97/37860 PCT Pub. Date Oct. 16, 1997An ink writing implement having a writing tip, an ink reservoir and a housing component enclosing the ink reservoir, includes a molded, ink delivery unit having a plurality of disc-shaped walls, a plurality of ring-shaped pressure compensation chambers, a flat area, an ink feed channel formed by the flat area, and a parting plane extending through the flat area.

Description

Die Erfindung bezieht sich auf ein Tintenschreibgerät gemäß Oberbegriff des Anspruchs 1.The invention relates to an ink writing device according to Preamble of claim 1.

Derartige Tintenschreibgeräte sind allgemein bekannt (z.B. DE-A-1 461 628, DD-A-0 151 561). Der die ringförmigen Druckausgleichskammern kapillarer Abmessung aufweisende Formkörper solcher Tintenschreibgeräte wird im Spritzgußverfahren in einer Backenform hergestellt, die zwei Formhälften aufweist, wobei in jeder Formhälfte Blechpakete aus dünnwandigen Blechlamellen gehaltert sind, die beispielsweise eine Dicke von 0,10 mm bis 1,0 mm haben können. Zusätzlich ist das Blechpaket einer der Formhälften mit einem im Umfangsbereich vorgesehenen axial verlaufenden Längsblech versehen, durch das im herzustellenden Formkörper der axial verlaufende, kapillare Tintenleitkanal, etwa in Form einer Abflachung (DE-A-3 429 031) ausgebildet wird, aus dem im Betrieb Tinte in die ringförmigen Druckausgleichskammer eintritt, wenn im Inneren des Tintenschreibgerätes ein Überdruck entsteht.Such ink pens are well known (e.g. DE-A-1 461 628, DD-A-0 151 561). The annular pressure equalization chambers Shaped bodies having capillary dimensions of such Ink pens are injection molded in a jaw mold made which has two mold halves, each in Half of the form of sheet metal packages held from thin-walled sheet metal lamellae are, for example, have a thickness of 0.10 mm to 1.0 mm can. In addition, the laminated core is one of the mold halves an axially extending longitudinal plate provided in the peripheral region provided by the axially in the molded body to be produced running, capillary ink guide channel, approximately in the form of a Flattening (DE-A-3 429 031) is formed from which in operation Ink enters the annular pressure equalization chamber when Overpressure occurs inside the ink pen.

Um mittels der Backenform über ihren ganzen Umfang durchgehende Druckausgleichskammern im wesentlichen konstanter Breite auszubilden, so daß ein großes Volumen für die Aufnahme überschüssiger Tinte erhalten wird, ist es erforderlich, daß die einzelnen Bleche der Blechpakete der beiden Formhälften beim Schließen der Form fluchtend aufeinander liegen und nicht axial gegeneinander versetzt sind. Nur bei fluchtender Ausrichtung wird erreicht, daß eine ringförmige Druckausgleichskammer eine durchgehende Verbindung im wesentlichen konstanter Abmessung von der einen Seite des Tintenleitkanals um den Umfang des Formkörpers zur anderen Seite des Tintenleitkanals bildet. Eine solche fluchtende Ausrichtung ist jedoch wegen der großen Anzahl von äußerst dünnwandigen Blechen der Blechpakete nur mit großem Aufwand zu erreichen. Normalerweise ergibt sich immer ein gewisser axialer Versatz, so daß die jeweils zusammengehörenden Bleche der beiden Formhälften beim Schließen der Backenform in der Formtrennebene etwas axial gegeneinander versetzt sind. Dadurch entsteht dann im Formkörper im Bereich der Trennebene eine Verengung oder gar Unterbrechung von ringförmigen Druckausgleichskammern und somit eine Reduzierung des Kammervolumens, in jedem Fall aber eine Funktionsbeeinflussung.To be continuous over the entire circumference by means of the jaw shape Pressure equalization chambers of essentially constant width train so that a large volume for the intake of excess Ink is obtained, it is required that the individual sheets of the sheet packs of the two mold halves at Close the mold in alignment and not axially are offset from each other. Only when aligned achieved that an annular pressure equalization chamber continuous connection of essentially constant dimension of one side of the ink guide channel around the circumference of the shaped body to the other side of the ink guide channel. Such however, alignment is due to the large number of extremely thin-walled sheets of the sheet packs only with large Effort to achieve. Usually there is always a certain axial misalignment, so that the two belong together Sheets of the two mold halves when closing the jaw mold in the mold parting plane are slightly axially offset from each other. This then results in the molded part in the area of the parting plane a narrowing or even interruption of annular pressure compensation chambers and thus a reduction in the chamber volume, in in any case, an influence on the function.

Es ist auch bereits bekannt (WO 94/08798), den Formkörper eines Tintenschreibgerätes aus zwei getrennt hergestellten Körperelementen zusammenzusetzen, wobei die Trennebene der beiden Elemente durch den Tintenleitkanal verläuft, der zur Hälfte von dem einen Teilkörper und zur anderen Hälfte von dem anderen Teilkörper gebildet wird.It is also already known (WO 94/08798), the molded body of a Ink writing device made of two separately manufactured body elements put together, separating the two Elements runs through the ink guide channel, which is half of one part of the body and the other half of the other Partial body is formed.

Es ist Aufgabe der Erfindung, ein Schreibgerät gemäß Oberbegriff des Anspruchs 1 dahingehend zu verbessern, daß ohne nennenswerten Fertigungsaufwand erreicht wird, daß die ringförmigen Druckausgleichskammern des Formkörpers über praktisch ihren gesamten Umfang eine konstante Breite haben.The object of the invention is a writing instrument according to the preamble of claim 1 to improve in that without significant Manufacturing effort is achieved that the annular pressure compensation chambers of the molded body over practically their entire Circumference have a constant width.

Zur Lösung dieser Aufgabe wird ein Schreibgerät gemäß Oberbegriff des Anspruchs 1 erfindungsgemäß derart ausgestaltet, daß der Formkörper zur Bildung des Tintenleitkanals eine axial verlaufende Abflachung aufweist und daß sich die Formtrennebene durch diese Abflachung erstreckt.To solve this problem, a writing instrument according to the preamble of claim 1 designed according to the invention such that the Shaped body to form the ink guide channel an axially extending Has flattening and that the mold parting plane extends through this flattening.

Abweichend vom bekannten Aufbau des Formkörpers des Schreibgerätes liegt bei dem erfindungsgemäßen Schreibgerät die Formtrennebene nicht um 90° versetzt zu den Radien durch die Mitte des Tintenleitkanals, sondern in der Ebene solcher Radien, wobei der Tintenleitkanal durch eine Abflachung des Formkörpers gebildet wird. Die Ausbildung des Tintenleitkanals durch eine Abflachung ermöglicht es, in den Formhälften der Backenform entsprechende, radial nach innen vorstehende Bereiche auszubilden, die sich beim Schließen der Backenform aneinanderlegen und die das Öffnen der Backenform nach Durchführung des Spritzgußvorganges und zum Ausstoßen des hergestellten Formkörpers nicht behindern. Die ringförmigen Druckausgleichskammern werden durch Bleche von Blechpaketen in den Formhälften ausgebildet, die sich jeweils von der einen Seite der Abflachung bis zur der Abflachung diametral gegenüberliegenden Seite des Formkörpers erstrecken, so daß die Bleche der beiden Formhälften an dieser gegenüberliegenden Seite zusammenstoßen. Wenn sich dabei ein gewisser axialer Versatz der Bleche ergibt, so verringert dies nicht das Aufnahmevolumen der ringförmigen Druckausgleichskammern, selbst wenn diese an der der Abflachung gegenüberliegenden Seite überhaupt nicht miteinander in Verbindung stehen. Da jede Formhälfte eine Hälfte einer solchen Druckausgleichskammer ausbildet und jede dieser Hälften mit der den Tintenleitkanal bildenden Abflachung in Verbindung steht, ergibt sich eine Verbindung der gesamten Druckausgleichskammer mit dem Tintenleitkanal, ohne daß eine eventuelle Unterbrechung im Verlauf der Druckausgleichskammer an der dem Tintenleitkanal gegenüberliegenden Seite zu einer Volumensverringerung führen würde.Deviating from the known structure of the shaped body of the writing instrument the mold parting plane lies in the writing instrument according to the invention not offset by 90 ° to the radii through the center of the Ink guide channel, but in the plane of such radii, the Ink guide channel formed by flattening the molded body becomes. The formation of the ink guide channel by flattening makes it possible in the mold halves to match the jaw shape radially inwardly projecting areas to be formed in the Close the jaw shape together and open the Cheek mold after performing the injection molding process and Do not hinder ejection of the molded article produced. The annular pressure equalization chambers are covered by sheets of Sheet packets formed in the mold halves, each of which one side of the flat to diametrically flat extend opposite side of the molded body, so that the Sheets of the two mold halves on this opposite side collide. If there is a certain axial offset of the Sheet metal results, so this does not reduce the volume of the annular pressure equalization chambers, even if this on the Flattening opposite side not at all with each other stay in contact. Since each mold half is a half forms such a pressure compensation chamber and each of these halves in connection with the flattening forming the ink guide channel stands, there is a connection of the entire pressure compensation chamber with the ink guide channel, without a possible Interruption in the course of the pressure compensation chamber at the Ink guide channel opposite side to a volume reduction would lead.

Die Abflachung kann im Bereich einer im Formkörper ausgebildeten Trennwand liegen, die die Ringräume in Umfangsrichtung unterbricht, wobei die Abflachung eine Breite mindestens gleich der Dicke der Trennwand in deren radial äußerem Bereich hat, um eine ausreichende Verbindung zwischen dem Tintenleitkanal und den ringförmigen Druckausgleichskammern zu erhalten. Vorzugsweise verläuft dabei die Formtrennebene durch die Mitte der Trennwand und die Mitte der Abflachung.The flattening can be in the area of a formed in the molded body Partition wall that interrupts the annular spaces in the circumferential direction, the flattening being a width at least equal to that Thickness of the partition in its radially outer area has a sufficient connection between the ink guide and the to obtain annular pressure compensation chambers. Preferably the mold parting line runs through the middle of the partition and the middle of the flattening.

Die der Abflachung gegenüberliegenden Bereiche der scheibenförmigen Wände des Formkörpers können zur Bildung des Luftführungskanals abgeflacht sein. Dabei kann das vordere Ende des Luftführungskanals an einem mit der Umgebungsluft in Verbindung stehenden Ringraum enden.The areas of the disc-shaped areas opposite the flattening Walls of the molded body can form the air duct be flattened. The front end of the air duct can on one in connection with the ambient air standing annulus end.

In einem besonders bevorzugten Ausführungsbeispiel ist die Schreibspitze durch einen in eine axiale Durchgangsbohrung des Formkörpers eingesetzten Docht- oder Flüssigkeitsleitkörper gebildet.In a particularly preferred embodiment, the Writing tip through an in an axial through hole of the Shaped body used wick or liquid guide educated.

Die Erfindung wird im folgenden anhand ein Ausführungsbeispiel zeigenden Figuren näher erläutert.

Figur 1
zeigt im Schnitt ein Schreibgerät.
Figur 2
zeigt in einer Seitenansicht den Formkörper des Schreibgerätes aus Figur 1.
Figur 3
zeigt einen Schnitt entlang der Linie III-III aus Figur 2.
Figur 4
zeigt einen Schnitt entlang der Linie IV-IV aus Figur 2.
Figur 5
zeigt einen Schnitt entlang der Linie V-V aus Figur 2.
Figur 6
zeigt einen Schnitt entlang der Linie VI-VI aus Figur 2.
Figur 7
zeigt in einer Darstellung gemäß Figur 6 ein anderes Ausführungsbeispiel.
The invention is explained in more detail below with reference to figures showing an embodiment.
Figure 1
shows on average a writing instrument.
Figure 2
shows a side view of the molded body of the writing instrument of Figure 1.
Figure 3
shows a section along the line III-III of Figure 2.
Figure 4
shows a section along the line IV-IV of Figure 2.
Figure 5
shows a section along the line VV of Figure 2.
Figure 6
shows a section along the line VI-VI of Figure 2.
Figure 7
shows in a representation according to Figure 6 another embodiment.

Das dargestellte Schreibgerät hat eine vorstehende Schreibspitze 1, die am vorderen Ende eines Docht- oder Flüssigkeitsleitkörpers 2 ausgebildet ist, der in eine axiale Durchgangsbohrung 4 eines noch zu beschreibenden Formkörper 3 eingesteckt ist und an dessen hinteren Ende vorsteht. Am vorderen Ende ist der Docht oder Flüssigkeitsleitkörper 2 klemmend im vorderen Abschnitt 5 des Formkörpers 3 gehalten. Der Formkörper 3 sitzt in einem Halterschaft 20, dessen hinteres geschlossenes Ende, in das das überstehende Ende des Docht- oder Flüssigkeitskörpers 2 hineinragt, mit freier Schreibflüssigkeit, vorzugsweise Tinte, die gegebenenfalls auch Mikrofarbpartikel enthält, gefüllt ist. Diese Schreibflüssigkeit gelangt in üblicher Weise bei Verwendung einesDochtkörpers 2 durch dessen im Körper ausgebildete Kapillarstrukturen vom hinteren Ende zur Schreibspitze 1 und wird bei Verwendung eines nicht-porösen Flüssigkeitsleitkörpers 2 über in dessen Oberfläche ausgebildete Kapillarkanäle zur Schreibspitze 1 geführt.The writing instrument shown has a protruding writing tip 1, the front end of a wick or liquid guide 2 is formed, which is in an axial through hole 4 of a molded body 3 to be described and protrudes at the rear end. At the front end is the wick or liquid guide 2 is jammed in the front Section 5 of the molded body 3 held. The molded body 3 is seated in a holder shaft 20, the rear closed end, in the protruding end of the wick or liquid body 2 protrudes with free writing fluid, preferably ink, which may also contain micro-color particles. This writing fluid is used in the usual way a wick body 2 through its capillary structures formed in the body from the rear end to the writing tip 1 and is at Use of a non-porous liquid guide body 2 in the surface of which has capillary channels to the writing tip 1 guided.

Der Formkörper 3 hat in üblicher Weise in Umfangsrichtung verlaufende kreisringförmige Druckausgleichskammern 13 kapillarer Abmessung, die durch seitliche scheibenförmige Wände 12 begrenzt sind und deren Kammerbreite, wie ebenfalls bekannt, von hinten nach vorn zunimmt.The molded body 3 has in the usual manner in the circumferential direction running circular pressure equalization chambers 13 capillary Dimension limited by lateral disk-shaped walls 12 are and their chamber width, as is also known, from behind increases forward.

Die Wandung des Formkörpers 3, die die axiale Durchgangsbohrung 4 zur Aufnahme des Docht- oder Flüssigkeitsleitkörpers 2 umgibt, erstreckt sich im Bereich der ringförmigen Druckausgleichskammern 13 eine axial verlaufende Trennwand 9 bildend radial nach außen bis zu einer an den scheibenförmigen Wänden 12 ausgebildeten Abflachung 10, wobei, wie insbesondere in Figur 6 zu erkennen ist, die Trennwand 9 und die Abflachung 10 mittig bezüglich der Ebene 25 liegen und die Abflachung 10 breiter ist als die Trennwand 9. Die Abflachung 10 bildet zusammen mit dem umhüllenden Halterschaft 20 einen kapillaren Tintenleitkanal 11 (Figur 1), der axial vom hinteren Flansch 8 des Formkörpers zu einer vor den ringförmigen Druckausgleichskammern 13 liegenden scheibenförmigen Wand 14 verläuft, die gegebenenfalls die vordere Begrenzungswand der vorderen Druckausgleichskammer sein kann. Wie ohne weiteres zu erkennen ist, ist die Abflachung 10 bzw. der von ihr zusammen mit dem Halterschaft 20 gebildete Tintenleitkanal 11 mit allen in Umfangsrichtung verlaufenden ringförmigen Druckausgleichskammern 13 verbunden, und zwar zu beiden Seiten der Trennwand 9. Im übrigen ist der Flansch 8, wie in Figur 6 angedeutet, in einer Tiefe entsprechend der Abflachung 10 und in Umfangsrichtung über die halbe Breite der Abflachung 10 unterbrochen. Bei in den Halterschaft 20 eingesetztem Formkörper 3 liegt daher der Flansch 8 mit dem größten Teil seines Umfangs dichtend an der Innenfläche des Halterschaftes 20 an, bildet jedoch im Bereich der Unterbrechung des Flansches 8 eine enge, kapillare Verbindung zwischen dem Schreibflüssigkeitsvorratsraum 21 und den ringförmigen Druckausgleichskammern 13.The wall of the molded body 3, the axial through hole 4th for receiving the wick or liquid guide body 2, extends in the area of the annular pressure compensation chambers 13 radially forming an axially extending partition 9 outside up to one formed on the disk-shaped walls 12 Flattening 10, whereby, as can be seen in particular in FIG. 6 is, the partition 9 and the flat 10 in the center with respect to Level 25 lie and the flat 10 is wider than that Partition 9. The flat 10 forms together with the enveloping Holder shaft 20 has a capillary ink guide channel 11 (FIG 1), the axially from the rear flange 8 of the molded body to a lying in front of the annular pressure equalization chambers 13 disc-shaped wall 14, which may be the front Boundary wall of the front pressure compensation chamber can be. How can be easily recognized, the flattening 10 or that of the ink guide channel 11 formed together with the holder shaft 20 with all circumferential annular pressure equalization chambers 13 connected, on both sides of the Partition 9. The rest of the flange 8, as in Figure 6 indicated, at a depth corresponding to the flattening 10 and in Circumferential direction interrupted over half the width of the flat 10. With the molded body 3 inserted in the holder shaft 20 therefore lies the flange 8 with most of its circumference forms a seal on the inner surface of the holder shaft 20 however, in the area of the interruption of the flange 8, a narrow, capillary connection between the writing fluid reservoir 21 and the annular pressure equalization chambers 13.

An der der Abflachung 10 gegenüberliegenden Seite des Formkörpers 3 ist eine Abflachung 15 der scheibenförmigen Wände 12 vorhanden, durch die bei in den Halterschaft 20 eingestecktem Formkörper 3 ein Luftführungskanal 16 ausgebildet wird, der über einen zwischen scheibenförmigen Wänden 14 und 18 gebildeten Ringraum 17 sowie einen weiteren, durch eine scheibenförmige Trennwand 19 unterbrochenen Ringraum und eine axiale Nut 7 im die vordere Klemmung des Formkörpers 3 im Halterschaft 20 bewirkenden Abschnitt 6 des Formkörpers 3 mit der Umgebungsluft in Verbindung steht.On the side of the molded body opposite the flat 10 3 is a flat 15 of the disk-shaped walls 12 available, by the inserted in the holder shaft 20 Shaped body 3, an air duct 16 is formed, which one formed between disc-shaped walls 14 and 18 Annulus 17 and another, through a disc-shaped Partition 19 interrupted annular space and an axial groove 7 in the effecting front clamping of the molded body 3 in the holder shaft 20 Section 6 of the molded body 3 in connection with the ambient air stands.

Durch die Unterbrechung des hinteren Flansches 8 des Formkörpers 3, den kapillaren Tintenleitkanal 11 mit den mit ihm verbundenen ringförmigen, kapillaren Druckausgleichskammern 13 und den mit der Umgebungsluft in Verbindung stehenden Luftführungskanal 16 wird ein übliches Druckausgleichssystem gebildet. Entsteht im Innenraum des Schreibgerätes, insbesondere im Schreibflüssigkeitsvorratsraum 21 eine Druckerhöhung, wird Schreibflüssigkeit durch die enge Unterbrechung des hinteren Flansches 8 in den Bereich der hinteren ringförmigen Druckausgleichskammer gedrückt und gelangt von dort in den Tintenleitkanal 11, in dem sie unter Füllung weiterer ringförmiger Druckausgleichskammern 13 nach vorn verlagert wird, bis das Gleichgewicht wieder hergestellt ist. Bei Entnahme von Schreibflüssigkeit wird erst die in den Druckausgleichskammern 13 befindliche Flüssigkeit "verschrieben".By interrupting the rear flange 8 of the molded body 3, the capillary ink guide channel 11 with the with it connected annular, capillary pressure compensation chambers 13 and the air duct connected to the ambient air 16 a conventional pressure compensation system is formed. Arises in the interior of the writing instrument, especially in the Writing fluid reservoir 21 becomes a pressure increase Writing fluid through the tight break in the back Flange 8 in the area of the rear annular pressure compensation chamber pressed and from there enters the ink guide channel 11, in which they are filled with additional annular pressure equalization chambers 13 is shifted forward until balance is restored. When writing fluid is removed only the liquid in the pressure compensation chambers 13 "prescribed".

Um bei Verbrauch von Schreibflüssigkeit im Schreibflüssigkeitsvorratsraum 21 einen kontinuierlichen Druckausgleich zu gewährleisten, ist die Verbindung des Luftführungskanals 16 mit der Umgebungsluft vorhanden, so daß bei Entstehen eines Unterdruckes im Schreibflüssigkeitsvorratsraum 21 Luft durch die axiale Nut 7, den Ringraum 17, den Luftführungskanal 16 und die Unterbrechung im Umfang des Flansches 8 in den Schreibflüssigkeitsvorratsraum 21 gesaugt wird.In order to consume writing fluid in the writing fluid storage room 21 to ensure continuous pressure equalization, is the connection of the air duct 16 with the Ambient air is available so that when a negative pressure develops air in the writing fluid reservoir 21 through the axial groove 7, the annular space 17, the air duct 16 and the interruption in the circumference of the flange 8 in the writing fluid reservoir 21 is sucked.

Wie dargestellt und erläutert, weist der Formkörper 3 eine zur Bildung des Tintenleitkanals 11 dienende Abflachung 10 auf, die zu beiden Seiten der Trennwand 9 mit den ringförmigen Druckausgleichskammern 13 in Verbindung steht. Zur Herstellung dieses Formkörpers wird eine Backenform aus zwei Formhälften verwendet, die im geschlossenen Zustand mit ihrer Trennebene in der Ebene 25 liegt. Somit enthält jede der Formhälften Blechpakete zur Bildung der ringförmigen Druckausgleichskammern 13, die in der Trennebene 25 und an der der Trennwand 9 diametral gegenüberliegenden Seite zusammenstoßen. Selbst wenn es dabei im Anlagebereich der einzelnen Blechhälften zu einem axialen Versatz kommt, wird beim Spritzgießen des Formkörpers 3, bezogen auf Figur 6, sowohl oberhalb als auch unterhalb der Trennebene 25 eine vollständige halbe ringförmige Druckausgleichskammer 13 ausgebildet, während infolge des axialen Versatzes der Bleche die ringförmige Druckausgleichskammer 13 im Bereich diametral gegenüber der Trennwand 9 eine Verengung oder Unterbrechung aufweisen kann. Diese beeinträchtigt jedoch das Aufnahmevolumen der ringförmigen Druckausgleichskammer 13 nicht, da diese, wiederum bezogen auf Figur 6, sowohl über den oberen Abschnitt der Abflachung 10 als auch über den unteren Abschnitt der Abflachung 10 eine ungehinderte Verbindung zum Tintenleitkanal 11 hat, aus diesem also in beiden Umfangsrichtungen ungehindert Schreibflüssigkeit eintreten kann.As shown and explained, the molded body 3 has one Formation of the ink guide channel 11 serving flat 10, the on both sides of the partition 9 with the annular pressure compensation chambers 13 communicates. To make this Molded body, a jaw mold made of two mold halves is used, those in the closed state with their parting level in level 25 lies. Each of the mold halves thus contains laminated cores for formation of the annular pressure compensation chambers 13, which are in the parting plane 25 and on the partition 9 diametrically opposite Side collide. Even if it is in the investment area of Axial misalignment of individual sheet metal halves occurs when Injection molding of the molded body 3, based on Figure 6, both a complete one above and below the parting plane 25 half annular pressure equalization chamber 13 formed while due to the axial misalignment of the sheets, the annular Pressure compensation chamber 13 in the area diametrically opposite the Partition 9 may have a narrowing or interruption. However, this affects the receiving volume of the annular Pressure compensation chamber 13 is not, since this, again based on Figure 6, both over the upper portion of the flat 10 also over the lower portion of the flat 10 an unobstructed Has connection to the ink guide channel 11, so in this Enter the writing fluid unhindered in both circumferential directions can.

In dem Ausführungsbeispiel gemäß Figur 7 sind gleiche bzw. einander entsprechende Teile mit gleichen Bezugszeichen und zusätzlich mit ' bezeichnet.In the exemplary embodiment according to FIG. 7, the same or corresponding parts with the same reference numerals and additionally marked with '.

Während in dem Ausführungsbeispiel gemäß Figuren 1 bis 6 die scheibenförmigen Wände 12 in ihren kreisförmigen Bereichen den gleichen Durchmesser wie der kreisförmige Bereich von Flansch 8 und der Wände 18 und 19 haben und daher in Berührung mit der Innenfläche des Halterschaftes 20 stehen, ist der Duchmesser der kreisförmigen Bereiche der scheibenförmigen Wände 12' im Ausführungsbeispiel gemäß Figur 7 etwas kleiner, so daß sie sich im in den Halterschaft eingesteckten Zustand in geringfügigem Abstand von dessen Innenfläche befinden, also benachbarte Druckausgleichskammern in ihren radial äußeren Bereichen miteinander in Verbindung stehen.While in the embodiment shown in Figures 1 to 6 disk-shaped walls 12 in their circular areas same diameter as the circular area of flange 8 and the walls 18 and 19 and therefore in contact with the Stand inside surface of the holder shaft 20, the diameter is circular areas of the disk-shaped walls 12 'in the exemplary embodiment 7 somewhat smaller, so that they are in the slightly inserted into the holder shaft Distance from its inner surface, that is adjacent Pressure compensation chambers in their radially outer areas communicate with each other.

Claims (6)

  1. Ink writing implement:
    with a writing tip (1) provided at the front end, which is fed with ink from an ink reservoir volume (21) behind it,
    with a pressure equilibrating system which is in communication with the ambient air,
    with a number of annular, preferably circular pressure equilibrating chambers (13) of capillary dimensions, separated from one another by disc-shaped walls (12; 12'),
    with a capillary ink duct (11) which connects the ink reservoir volume (21) with the pressure equilibrating chambers (13), and with an air through-flow duct (16) connected to the ink reservoir volume (21) and the ambient air, and
    with a tubular casing component (20) which encloses the pressure equilibrating chambers (13) and the ink duct (11) and whose inside surface covers the ink duct (11) radially on the outside,
    such that the disc-shaped walls (12; 12') and the ink duct (11) are part of a moulded body (3) made by injection moulding in a clamp mould consisting of two mould halves with sheet packs fitted in them to form the annular pressure equilibrating chambers (13), in which the mould parting plane (25; 25') can be seen,
    characterised in that
       the moulded body (3) has an axially extending flat area (10; 10') which forms the ink duct (11) and the mould parting plane (25; 25') extends through this flat area (10; 10').
  2. Ink writing implement according to Claim 1,
    characterised in that
    the flat area (10; 10') is located in the area of a partition wall (9; 9') which interrupts the pressure equilibrating chambers (13) and has a width at least equal to the thickness of the radially outer area of the partition wall (9; 9').
  3. Ink writing implement according to Claim 1,
    characterised in that
    the mould parting plane (25; 25') passes through the middle of the partition wall (9; 9') and the middle ofthe flat area (10; 10').
  4. Ink writing implement according to any of Claims 1 to 3,
    characterised in that
    the area (15; 15') of the disc-shaped walls (12; 12') of the moulded body (3) opposite the flat area (10; 10') is flattened so as to form the air through-flow duct (16).
  5. Ink writing implement according to Claim 4,
    characterised in that
    the front end of the air through-flow duct (16) ends in an annular space (17) which communicates with the ambient air.
  6. Ink writing implement according to any of Claims 1 to 5,
    characterised in that
    the writing tip (1) is formed by a wick or liquid-conducting body (2) located in an axial through-hole (4; 4') in the moulded body (3).
EP97918087A 1996-04-04 1997-04-01 Ink writing implement Expired - Lifetime EP0891263B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19614784 1996-04-04
DE19614784A DE19614784C1 (en) 1996-04-04 1996-04-04 Ink pen
PCT/EP1997/001597 WO1997037860A1 (en) 1996-04-04 1997-04-01 Ink writing implement

Publications (2)

Publication Number Publication Date
EP0891263A1 EP0891263A1 (en) 1999-01-20
EP0891263B1 true EP0891263B1 (en) 2000-01-19

Family

ID=7791288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918087A Expired - Lifetime EP0891263B1 (en) 1996-04-04 1997-04-01 Ink writing implement

Country Status (10)

Country Link
US (1) US6062758A (en)
EP (1) EP0891263B1 (en)
JP (1) JP2000502626A (en)
KR (1) KR100284394B1 (en)
AT (1) ATE188920T1 (en)
DE (2) DE19614784C1 (en)
GR (1) GR3032438T3 (en)
PT (1) PT891263E (en)
TW (1) TW365228U (en)
WO (1) WO1997037860A1 (en)

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Publication number Priority date Publication date Assignee Title
US6416242B1 (en) 1993-11-12 2002-07-09 Dataprint R. Kaufmann Gmbh Efficient fluid dispensing utensil
DE19529865C2 (en) 1995-08-14 2002-02-28 Kaufmann R Dataprint Device for applying liquids to a base by means of an application element
DE19803622A1 (en) 1998-01-31 1999-08-12 Staedtler Fa J S Ball-point pen useful as hand writing implement or as recorder or plotter pen
WO2000030866A1 (en) * 1998-11-19 2000-06-02 Mitsubishi Pencil Kabushiki Kaisha Collector for writing instruments
US6390711B1 (en) 2000-11-13 2002-05-21 Chartpak, Inc. Liquid ink writing pen
US6425702B1 (en) 2000-11-14 2002-07-30 Chartpak, Inc. Multi-color pen system
US6464420B2 (en) 2001-03-29 2002-10-15 Chartpak, Inc. Liquid ink writing pen with visible tip
JP2002293083A (en) * 2001-03-30 2002-10-09 Mitsubishi Pencil Co Ltd Collector in writing utensil and mold assembly for collector
US6457892B1 (en) 2001-04-20 2002-10-01 Avery Dennison Corporation Writing instrument having a capillary hole through the container
US6637965B1 (en) 2001-06-22 2003-10-28 Avery Dennison Corporation Writing instrument having a reservoir between a tip and a capillary storage
TWI239903B (en) * 2002-11-21 2005-09-21 Kotobuki & Co Ltd Liquid container
DE102015008273B4 (en) * 2015-06-26 2017-09-21 Schneider GmbH & Co. Produktions- und Vertriebs-KG Ink regulator, writing instrument and refill unit or refill for such writing instrument

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Publication number Priority date Publication date Assignee Title
DE151561C (en) *
DE1461628A1 (en) * 1965-04-30 1969-03-27 Montblanc Simplo Gmbh Ink feed for fountain pen
DD151561A3 (en) * 1978-11-16 1981-10-28 Ahrens Hans Joachim INK LEAD SYSTEM WITH PRIMARY AND SECONDARY ROLLING VOLUME
CA1209093A (en) * 1982-03-16 1986-08-05 Thomas D. Hall Writing instruments and their manufacture
DE3420287C2 (en) * 1983-06-03 1985-11-14 Pilot Man-Nen Hitsu K.K., Tokio/Tokyo Insert for a writing implement
DE3429031A1 (en) * 1984-08-07 1986-02-20 Walter Ing.(grad.) 6907 Nußloch Anweiler Fountain pen
JPS6145191U (en) * 1984-08-29 1986-03-25 パイロツトインキ株式会社 writing implements
FR2685252A1 (en) * 1991-12-20 1993-06-25 Shen Bo Chang A ball-point nib assembly with a supply unit for a fountain pen
IT1261964B (en) * 1992-10-09 1996-06-11 PROCEDURE FOR MAKING PEN FOR PEN OF PENNA PENNA PENNA STILOGRAFICA AND PIPE OBTAINED FOR THE PROCEDURE

Also Published As

Publication number Publication date
ATE188920T1 (en) 2000-02-15
US6062758A (en) 2000-05-16
TW365228U (en) 1999-07-21
KR100284394B1 (en) 2001-03-02
EP0891263A1 (en) 1999-01-20
DE19614784C1 (en) 1997-12-11
WO1997037860A1 (en) 1997-10-16
JP2000502626A (en) 2000-03-07
KR19990072155A (en) 1999-09-27
GR3032438T3 (en) 2000-05-31
PT891263E (en) 2000-06-30
DE59701041D1 (en) 2000-02-24

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