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EP2024191B1 - Writing instrument having a capillary writing tip - Google Patents

Writing instrument having a capillary writing tip Download PDF

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Publication number
EP2024191B1
EP2024191B1 EP07766031A EP07766031A EP2024191B1 EP 2024191 B1 EP2024191 B1 EP 2024191B1 EP 07766031 A EP07766031 A EP 07766031A EP 07766031 A EP07766031 A EP 07766031A EP 2024191 B1 EP2024191 B1 EP 2024191B1
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EP
European Patent Office
Prior art keywords
ring
head
barrel
writing instrument
ribs
Prior art date
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Active
Application number
EP07766031A
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German (de)
French (fr)
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EP2024191A2 (en
Inventor
Franck Rolion
Arnaud Bez
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BIC SA
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BIC SA
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Publication date
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Publication of EP2024191A2 publication Critical patent/EP2024191A2/en
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Publication of EP2024191B1 publication Critical patent/EP2024191B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/003—Capillary nibs
    • 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
    • B43K8/003—Pen barrels
    • 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
    • B43K8/026—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material with writing-points comprising capillary material
    • 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 having a capillary writing tip.
  • a writing instrument of this type is known from the patent US6474887 and is partially reproduced Figures 7 and 8 attached.
  • the instrument 100 comprises a barrel 110, a head 102, a capillary connector 103, and a reservoir compartment 105 into which is introduced a buffer 106 of fibrous material impregnated with liquid.
  • a radial shoulder 131 of the writing tip abuts the forward end of the head 102 to prevent axial displacement of the connector 103 backward in the event of an impact on the tip, particularly if the front of the tip 'instrument 100 hits a surface quickly.
  • Four inner longitudinal ribs 120 hold the connector 103 and allow air to pass between the front end of the head and the reservoir compartment 105.
  • Such a writing instrument has various disadvantages.
  • the radial shoulder 131 bears only on the front ends of the ribs 120.
  • the bearing surface is relatively small and does not guarantee a good axial abutment of the tip if the latter is shocked.
  • the solutions of respectively increasing the diameter of this radial shoulder 131 and / or increasing the number of ribs 120 would have the disadvantage of reducing the cross-section air passage between the tip 103 and the head 102.
  • the abutment member By placing the abutment member away from the front opening of the head, as described for example in the patent JP-A-2002 255,255 there is more space to form an air passage around this organ.
  • the stop member in the form of a ring allows the capillary connector to press axially on an extended solid surface.
  • the one-piece construction avoids any risk of disassembly and therefore guarantees the strength of the stop member.
  • such an embodiment in one piece has advantages in terms of simplicity of the manufacturing process which can represent a significant cost reduction for a production in very large series.
  • the object of the invention is to propose a liquid applicator type writing instrument which allows a firm hold in axial abutment of the writing tip in the event of shock or excessive pressure on this point and a retention of the fibrous material. buffer in the tank compartment.
  • the subject of the invention is a writing instrument according to claim 1.
  • the ring has a longitudinal front face inscribed in the section of the front opening of the head, and the radially inner wall of the head has a taper facing rearwardly.
  • a first pin defines at least the opening of the head, the top portion of each rib, and the longitudinal front face of the ring, and may have the shape of a cylindrical bar of the same diameter as the outer diameter of the ring. Longitudinal grooves are then provided in the cylindrical wall of this pin to form the ribs.
  • a second pin defines at least the inner wall of the barrel and most of the head, the base of the ribs, the rear longitudinal face of the ring, and preferably the outer radial wall of the ring.
  • the inner radial wall of the ring can be defined by one or the other of the two pins. The fact that the radially inner wall of the head has a rearward taper makes it easier to remove the second pin.
  • the writing instrument 1 comprises a drum 10 and a head 2 made in one molded part.
  • the barrel 10 comprises a reservoir compartment 5 which contains an ink or an eraser liquid.
  • the ink is for example retained by capillarity in a buffer 6.
  • the writing tip of the instrument is constituted by the front end of a substantially cylindrical capillary connector 3 which is held along the central axis A by means of longitudinal ribs 20 molded in the head 2. It is understood that the connector 3 could be formed by several capillary pieces placed end to end.
  • the ribs 20 allow an air passage between the front end of the head 2 and the reservoir compartment 5, and extend rearwardly from the front opening of the head 2.
  • Most of the connector 3 consists of a substantially cylindrical main portion 30, this main portion having a diameter slightly greater than the diameter of a rear portion 32 of the connector 3 so as to create a radial shoulder 31 remote from the tip of the connector. writing.
  • Three longitudinal ribs 20 are distributed at 120 ° around the central axis, and the vertices 201 of these ribs form three lines parallel to the axis A which define a cylindrical space of the same diameter as the main portion 30 of the connector 3 to maintain radially this connector.
  • Each rib 20 preferably has at its front end a flared shape to facilitate the introduction of the connector 3 during assembly.
  • a ring 4 has an inner diameter which corresponds to the diameter of the rear portion 32 of the connector to surround with contact a part of this rear portion 32 and form a stop member cooperating with the connector.
  • the radial shoulder 31 of the connector can thus axially support an extended solid surface.
  • the ribs 20 solidly connect the barrel 10 to the ring 4 extending radially between the ring and the barrel. Furthermore, these ribs 20 extend longitudinally to the level of the rear longitudinal face of the ring, and it can be provided to extend longitudinally rearward a relatively low height of each rib to form secondary ribs as explained ci -after.
  • the ring 4, the ribs 20, the head 2 and the barrel 10 are made in one molded piece.
  • the editing of the writing instrument essentially consists in installing the connector 3 in the head of the writing instrument and in introducing the ink pad 6 into the rear opening of the drum, not shown.
  • the longitudinal ribs 20 may be extended in this compartment by secondary ribs 21 whose height e is less than a quarter of the inner radius of the barrel. It can be expected that this height e decreases progressively rearwardly over all or part of the length of the secondary ribs 21.
  • Another advantage of these secondary ribs 21 is to allow stall the ink pad 6 in the tank compartment 5 while leaving a certain air passage between the buffer and the inner wall of the barrel, which prevents an air depression that would impede the flow of ink from the buffer to the connector is created at the rear of the tank compartment 5.
  • the head 2 has a substantially tubular front portion 2A provided to receive a cap. At the rear of this part 2A, the empty space between the connector 3 and the inner wall of the head 2 becomes larger, as visible on the figure 3 in comparison with the figure 6 .
  • a empty compartment 7 open at its two axial ends is thus created between each pair of ribs 20, and three empty compartments 7 are distributed around the main portion 30 of the connector 3.
  • the radially inner wall of the head 2 at each compartment 7 has a conicity oriented rearward, so that it does not form against undercut for demolding.
  • the ring 4 has a longitudinal front face 4A inscribed in the section of the front opening. of the head.
  • the outer radius R4 of the ring is equal to the inner radius of the front portion 2A of the head. This allows a sufficiently thick ring for the strength of the stop member, with a smaller diameter sufficient to not compromise the passage section of the ink by the rear portion 32 of the connector.
  • the ring 4 contributes to the maintenance of the fibrous material of the buffer 6 in the reservoir compartment 5 and avoids to a certain extent that part of this fibrous material moves forward and enters the compartments 7 if the instrument 1 hits a surface, which is advantageous compared to the known device of the figure 7 .
  • the sectional view of the figure 4 according to plan IV-IV of the figure 1 illustrates an advantageous embodiment in which the outer radius R4 of the ring 4 is between half and three quarters of the inner radius R1 of the barrel 10 measured at the level of the ring.
  • This choice is advantageous for reconciling both a satisfactory maintenance of the buffer 6 in the event of impact and a sufficient air passage section between the compartments 7 and the reservoir compartment 5.
  • This radius R4 is also equal to the inner radius of the front part 2A of the head as shown on the figure 6 .
  • the figure 5 illustrates that the height e of the secondary ribs 21 is less than one quarter of the inner radius of the barrel, to leave a sufficient air passage between the buffer and the inner wall of the barrel without unduly reducing the diameter of the buffer relative to the inner diameter of the barrel.
  • each longitudinal rib 20 is relatively small relative to the radius of the main portion 30 of the connector, and the thickness of a rib is also relatively small.
  • the height and thickness dimensions of a rib are provided to ensure a sufficient air passage section in the front portion 2A of the head without compromising the stiffness of the ribs for a firm radial retention of the connector.

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  • Pens And Brushes (AREA)

Abstract

A writing instrument that includes a barrel having a front end, a fluid reservoir compartment, and a longitudinal axis. The writing instrument further includes a head disposed at the front end of the barrel where the head has a front part with an opening and at least one rib having a peak; a capillary connector having a front portion, a main portion having a diameter, a rear portion having a diameter, and a radial shoulder, where the capillary connector extends from the front part of the head to the fluid reservoir compartment; and a ring substantially coaxial with the longitudinal axis and disposed at a distance from the opening in the front part of the head. At least one air passage is formed between the ring and the barrel and the at least on rib extends in a radial direction between the ring and the barrel.

Description

La présente invention se rapporte à un instrument d'écriture présentant une pointe d'écriture capillaire.The present invention relates to a writing instrument having a capillary writing tip.

Un instrument d'écriture de ce type est connu du brevet US6474887 et est partiellement reproduit aux figures 7 et 8 annexées. L'instrument 100 comprend un fût 110, une tête 102, un connecteur capillaire 103, et un compartiment réservoir 105 dans lequel est introduit un tampon 106 en matière fibreuse imbibée de liquide. Un épaulement radial 131 de la pointe d'écriture appuie en butée contre l'extrémité avant de la tête 102 pour empêcher un déplacement axial du connecteur 103 vers l'arrière en cas de choc sur la pointe, en particulier si l'avant de l'instrument 100 vient heurter rapidement une surface. Quatre nervures longitudinales intérieures 120 maintiennent le connecteur 103 et permettent un passage d'air entre l'extrémité avant de la tête et le compartiment réservoir 105.A writing instrument of this type is known from the patent US6474887 and is partially reproduced Figures 7 and 8 attached. The instrument 100 comprises a barrel 110, a head 102, a capillary connector 103, and a reservoir compartment 105 into which is introduced a buffer 106 of fibrous material impregnated with liquid. A radial shoulder 131 of the writing tip abuts the forward end of the head 102 to prevent axial displacement of the connector 103 backward in the event of an impact on the tip, particularly if the front of the tip 'instrument 100 hits a surface quickly. Four inner longitudinal ribs 120 hold the connector 103 and allow air to pass between the front end of the head and the reservoir compartment 105.

Un tel instrument d'écriture présente divers inconvénients. Tout d'abord, l'épaulement radial 131 est en appui uniquement sur les extrémités avant des nervures 120. De ce fait, la surface d'appui est relativement faible et ne garantit pas un bon maintien en butée axiale de la pointe si cette dernière subit un choc. Les solutions consistant respectivement à augmenter le diamètre de cet épaulement radial 131 et/ou à augmenter le nombre de nervures 120 présenteraient l'inconvénient de diminuer la section de passage d'air entre la pointe 103 et la tête 102.Such a writing instrument has various disadvantages. First, the radial shoulder 131 bears only on the front ends of the ribs 120. As a result, the bearing surface is relatively small and does not guarantee a good axial abutment of the tip if the latter is shocked. The solutions of respectively increasing the diameter of this radial shoulder 131 and / or increasing the number of ribs 120 would have the disadvantage of reducing the cross-section air passage between the tip 103 and the head 102.

De plus, d'autre instruments d'écriture présentant une pointe d'écriture capillaire sont décrits dans les brevets JP-A- 2002 255 255 et US-A-4 341 481 . Enfin, le brevet US-A-5 454 658 décrit un instrument d'écriture selon le préambule de la revendication 1.In addition, other writing instruments having a hair-writing tip are described in the patents JP-A-2002 255 255 and US-A-4,341,481 . Finally, the patent US-A-5,454,658 describes a writing instrument according to the preamble of claim 1.

En plaçant l'organe de butée à distance de l'ouverture avant de la tête, comme décrit par exemple dans le brevet JP-A-2002 255 255 , il y a plus d'espace pour former un passage d'air autour de cet organe. L'organe de butée sous la forme d'un anneau permet au connecteur capillaire d'appuyer axialement sur une surface solide étendue. De plus, la réalisation en une seule pièce évite tout risque de désassemblage et garantit donc la solidité de l'organe de butée. D'autre part, une telle réalisation en une seule pièce présente des avantages en terme de simplicité du procédé de fabrication qui peuvent représenter une réduction de coût significative pour une production en très grande série.By placing the abutment member away from the front opening of the head, as described for example in the patent JP-A-2002 255,255 there is more space to form an air passage around this organ. The stop member in the form of a ring allows the capillary connector to press axially on an extended solid surface. In addition, the one-piece construction avoids any risk of disassembly and therefore guarantees the strength of the stop member. On the other hand, such an embodiment in one piece has advantages in terms of simplicity of the manufacturing process which can represent a significant cost reduction for a production in very large series.

L'invention a pour but de proposer un instrument d'écriture de type applicateur de liquide qui permette un maintien ferme en butée axiale de la pointe d'écriture en cas de choc ou de pression excessive sur cette pointe et un maintien de la matière fibreuse du tampon dans le compartiment réservoir. A cet effet, l'invention a pour objet un instrument d'écriture selon la revendication 1.The object of the invention is to propose a liquid applicator type writing instrument which allows a firm hold in axial abutment of the writing tip in the event of shock or excessive pressure on this point and a retention of the fibrous material. buffer in the tank compartment. For this purpose, the subject of the invention is a writing instrument according to claim 1.

Préférablement, l'anneau présente une face longitudinale avant inscrite dans la section de l'ouverture avant de la tête, et la paroi radialement intérieure de la tête présente une conicité orientée vers l'arrière. Ainsi, il est possible de réaliser le moulage du fût, de la tête, des nervures et de l'anneau dans un moule en deux parties avec deux broches mobiles relativement en sens contraire selon l'axe central. Une première broche définit au moins l'ouverture de la tête, la partie sommitale de chaque nervure, et la face longitudinale avant de l'anneau, et peut présenter la forme d'un barreau cylindrique de même diamètre que le diamètre extérieur de l'anneau. Des gorges longitudinales sont alors prévues dans la paroi cylindrique de cette broche pour former les nervures. Une seconde broche définit au moins la paroi intérieure du fût et de la majeure partie de la tête, la base des nervures, la face longitudinale arrière de l'anneau, et préférablement la paroi radiale extérieure de l'anneau. La paroi radiale intérieure de l'anneau peut quant à elle être définie par l'une ou l'autre des deux broches. Le fait que la paroi radialement intérieure de la tête présente une conicité orientée vers l'arrière permet de faciliter le retrait de la seconde broche.Preferably, the ring has a longitudinal front face inscribed in the section of the front opening of the head, and the radially inner wall of the head has a taper facing rearwardly. Thus, it is possible to perform the molding of the barrel, the head, the ribs and the ring in a mold in two parts with two pins movable relatively in opposite directions along the central axis. A first pin defines at least the opening of the head, the top portion of each rib, and the longitudinal front face of the ring, and may have the shape of a cylindrical bar of the same diameter as the outer diameter of the ring. Longitudinal grooves are then provided in the cylindrical wall of this pin to form the ribs. A second pin defines at least the inner wall of the barrel and most of the head, the base of the ribs, the rear longitudinal face of the ring, and preferably the outer radial wall of the ring. The inner radial wall of the ring can be defined by one or the other of the two pins. The fact that the radially inner wall of the head has a rearward taper makes it easier to remove the second pin.

Dans des modes de réalisation préférés de l'instrument d'écriture selon l'invention, on a recours notamment à l'une ou l'autre des dispositions suivantes :

  • l'anneau est sensiblement circulaire et est coaxial à l'axe central,
  • le rayon extérieur de l'anneau est égal au rayon de la paroi radialement intérieure de la partie avant de la tête,
  • le rayon extérieur de l'anneau est compris entre la moitié et les trois quarts du rayon intérieur du fût au niveau de l'anneau,
  • les nervures longitudinales sont prolongées dans le compartiment réservoir par des nervures secondaires dont la hauteur est inférieure au quart du rayon intérieur du fût,
  • l'instrument d'écriture comporte trois nervures longitudinales réparties à 120°.
In preferred embodiments of the writing instrument according to the invention, use is made in particular of one or other of the following provisions:
  • the ring is substantially circular and is coaxial with the central axis,
  • the outer radius of the ring is equal to the radius of the radially inner wall of the front part of the head,
  • the outer radius of the ring is between half and three quarters of the inner radius of the barrel at the ring,
  • the longitudinal ribs are extended in the reservoir compartment by secondary ribs whose height is less than a quarter of the inner radius of the drum,
  • the writing instrument comprises three longitudinal ribs distributed at 120 °.

D'autres caractéristiques et avantages ressortent de la description qui va suivre d'exemples non limitatifs de modes de réalisation, en référence aux figures dans lesquelles :

  • La figure 1 représente schématiquement une vue partielle en coupe longitudinale de la partie avant d'un instrument d'écriture selon l'invention.
  • La figure 2 représente schématiquement une vue en perspective arrachée de la partie de l'instrument d'écriture représentée sur la figure 1.
  • La figure 3 représente schématiquement une vue en coupe transversale de l'instrument d'écriture de la figure 1 selon le plan III-III.
  • La figure 4 représente schématiquement une vue en coupe transversale de l'instrument d'écriture de la figure 1 selon le plan IV-IV.
  • La figure 5 représente schématiquement une vue en coupe transversale de l'instrument d'écriture de la figure 1 selon le plan V-V.
  • La figure 6 représente schématiquement une vue en coupe transversale de l'instrument d'écriture de la figure 1 selon le plan VI-VI.
  • Les figures 7 et 8 représentent schématiquement un instrument d'écriture connu du brevet US 6 474 887 .
Other features and advantages are apparent from the following description of non-limiting examples of embodiments, with reference to the figures in which:
  • The figure 1 schematically represents a partial view in longitudinal section of the front portion of a writing instrument according to the invention.
  • The figure 2 schematically represents a broken perspective view of the part of the writing instrument shown in FIG. figure 1 .
  • The figure 3 schematically represents a cross-sectional view of the writing instrument of the figure 1 according to plan III-III.
  • The figure 4 schematically represents a cross-sectional view of the writing instrument of the figure 1 according to plan IV-IV.
  • The figure 5 schematically represents a cross-sectional view of the writing instrument of the figure 1 according to the VV plan.
  • The figure 6 schematically represents a cross-sectional view of the writing instrument of the figure 1 according to plan VI-VI.
  • The Figures 7 and 8 schematically represent a known writing instrument of the patent US 6,474,887 .

Les figures 1 et 2 représentent une même partie de l'instrument d'écriture et sont décrites conjointement. Sur la figure 1, l'instrument d'écriture 1 comprend un fût 10 et une tête 2 réalisés en une seule pièce moulée. Le fût 10 comporte un compartiment réservoir 5 qui contient une encre ou un liquide effaceur. L'encre est par exemple retenue par capillarité dans un tampon 6. La pointe d'écriture de l'instrument est constituée par l'extrémité avant d'un connecteur capillaire 3 sensiblement cylindrique qui est maintenu selon l'axe central A grâce à des nervures longitudinales 20 moulées dans la tête 2. Il est entendu que le connecteur 3 pourrait être formé par plusieurs pièces capillaires mises bout à bout. Les nervures 20 permettent un passage d'air entre l'extrémité avant de la tête 2 et le compartiment réservoir 5, et s'étendent vers l'arrière depuis l'ouverture avant de la tête 2.The Figures 1 and 2 represent the same part of the writing instrument and are described together. On the figure 1 , the writing instrument 1 comprises a drum 10 and a head 2 made in one molded part. The barrel 10 comprises a reservoir compartment 5 which contains an ink or an eraser liquid. The ink is for example retained by capillarity in a buffer 6. The writing tip of the instrument is constituted by the front end of a substantially cylindrical capillary connector 3 which is held along the central axis A by means of longitudinal ribs 20 molded in the head 2. It is understood that the connector 3 could be formed by several capillary pieces placed end to end. The ribs 20 allow an air passage between the front end of the head 2 and the reservoir compartment 5, and extend rearwardly from the front opening of the head 2.

La plus grande partie du connecteur 3 est constituée par une portion principale 30 essentiellement cylindrique, cette portion principale ayant un diamètre légèrement supérieur au diamètre d'une portion arrière 32 du connecteur 3 de façon à créer un épaulement radial 31 éloigné de la pointe d'écriture.Most of the connector 3 consists of a substantially cylindrical main portion 30, this main portion having a diameter slightly greater than the diameter of a rear portion 32 of the connector 3 so as to create a radial shoulder 31 remote from the tip of the connector. writing.

Trois nervures longitudinales 20 sont réparties à 120° autour de l'axe central, et les sommets 201 de ces nervures forment trois lignes parallèles à l'axe A qui définissent un espace cylindrique de même diamètre que la portion principale 30 du connecteur 3 pour maintenir radialement ce connecteur. Chaque nervure 20 comporte préférablement à son extrémité avant une forme évasée permettant de faciliter l'introduction du connecteur 3 lors du montage. Juste à l'arrière de l'épaulement radial 31 du connecteur 3, à distance de l'ouverture avant de la tête, un anneau 4 présente un diamètre intérieur qui correspond au diamètre de la portion arrière 32 du connecteur pour entourer avec contact une partie de cette portion arrière 32 et former un organe de butée coopérant avec le connecteur. L'épaulement radial 31 du connecteur peut ainsi appuyer axialement sur une surface solide étendue. Les nervures 20 relient solidairement le fût 10 à l'anneau 4 en s'étendant radialement entre l'anneau et le fût. Par ailleurs, ces nervures 20 s'étendent longitudinalement jusqu'au niveau de la face longitudinale arrière de l'anneau, et on peut prévoir de prolonger longitudinalement vers l'arrière une relativement faible hauteur de chaque nervure pour former des nervures secondaires comme expliqué ci-après.Three longitudinal ribs 20 are distributed at 120 ° around the central axis, and the vertices 201 of these ribs form three lines parallel to the axis A which define a cylindrical space of the same diameter as the main portion 30 of the connector 3 to maintain radially this connector. Each rib 20 preferably has at its front end a flared shape to facilitate the introduction of the connector 3 during assembly. Just behind the radial shoulder 31 of the connector 3, away from the front opening of the head, a ring 4 has an inner diameter which corresponds to the diameter of the rear portion 32 of the connector to surround with contact a part of this rear portion 32 and form a stop member cooperating with the connector. The radial shoulder 31 of the connector can thus axially support an extended solid surface. The ribs 20 solidly connect the barrel 10 to the ring 4 extending radially between the ring and the barrel. Furthermore, these ribs 20 extend longitudinally to the level of the rear longitudinal face of the ring, and it can be provided to extend longitudinally rearward a relatively low height of each rib to form secondary ribs as explained ci -after.

L'anneau 4, les nervures 20, la tête 2 et le fût 10 sont réalisés en une seule pièce moulée. Ainsi, le montage de l'instrument d'écriture consiste essentiellement à installer le connecteur 3 dans la tête de l'instrument d'écriture et à introduire le tampon d'encre 6 dans l'ouverture arrière du fût non représentée.The ring 4, the ribs 20, the head 2 and the barrel 10 are made in one molded piece. Thus, the editing of the writing instrument essentially consists in installing the connector 3 in the head of the writing instrument and in introducing the ink pad 6 into the rear opening of the drum, not shown.

Avantageusement, notamment pour accroître la rigidité de la paroi du fût dans la zone du compartiment réservoir 5, les nervures longitudinales 20 peuvent être prolongées dans ce compartiment par des nervures secondaires 21 dont la hauteur e est inférieure au quart du rayon intérieur du fût. On peut prévoir que cette hauteur e diminue progressivement vers l'arrière sur tout ou partie de la longueur des nervures secondaires 21. Un autre avantage de ces nervures secondaires 21 est de permettre de caler le tampon d'encre 6 dans le compartiment réservoir 5 tout en laissant un certain passage d'air entre le tampon et la paroi intérieure du fût, ce qui permet d'éviter qu'une dépression d'air qui gênerait la circulation de l'encre du tampon vers le connecteur se crée à l'arrière du compartiment réservoir 5.Advantageously, in particular to increase the rigidity of the barrel wall in the zone of the reservoir compartment 5, the longitudinal ribs 20 may be extended in this compartment by secondary ribs 21 whose height e is less than a quarter of the inner radius of the barrel. It can be expected that this height e decreases progressively rearwardly over all or part of the length of the secondary ribs 21. Another advantage of these secondary ribs 21 is to allow stall the ink pad 6 in the tank compartment 5 while leaving a certain air passage between the buffer and the inner wall of the barrel, which prevents an air depression that would impede the flow of ink from the buffer to the connector is created at the rear of the tank compartment 5.

La tête 2 comporte une partie avant 2A sensiblement tubulaire prévue pour recevoir un capuchon. A l'arrière de cette partie 2A, l'espace vide entre le connecteur 3 et la paroi intérieure de la tête 2 devient plus important, comme visible sur la figure 3 en comparaison avec la figure 6. Un compartiment vide 7 ouvert à ses deux extrémités axiales est ainsi créé entre chaque paire de nervures 20, et trois compartiments vides 7 sont donc répartis autour de la portion principale 30 du connecteur 3. La paroi radialement intérieure de la tête 2 au niveau de chaque compartiment 7 présente une conicité orientée vers l'arrière, afin qu'elle ne forme pas de contre dépouille pour le démoulage.The head 2 has a substantially tubular front portion 2A provided to receive a cap. At the rear of this part 2A, the empty space between the connector 3 and the inner wall of the head 2 becomes larger, as visible on the figure 3 in comparison with the figure 6 . A empty compartment 7 open at its two axial ends is thus created between each pair of ribs 20, and three empty compartments 7 are distributed around the main portion 30 of the connector 3. The radially inner wall of the head 2 at each compartment 7 has a conicity oriented rearward, so that it does not form against undercut for demolding.

Afin de réaliser le moulage du fût, de la tête, des nervures et de l'anneau dans un moule en deux parties avec seulement deux broches mobiles, l'anneau 4 présente une face longitudinale avant 4A inscrite dans la section de l'ouverture avant de la tête. Avec un anneau 4 sensiblement circulaire et une partie avant 2A de la tête de forme tubulaire à section circulaire comme dans le mode de réalisation représenté, ceci implique que le rayon extérieur R4 de l'anneau doit être inférieur ou égal au rayon intérieur de cette partie avant 2A. Ceci permet que l'espace de chaque compartiment 7 soit formé par une partie de la première broche et une partie de la seconde broche lors du moulage, ces deux parties de broches présentant une surface mutuelle de contact qui est coaxiale avec l'axe central A et qui leur permet de glisser l'une en sens contraire relativement à l'autre dans la direction axiale lorsque les broches sont retirées au démoulage.In order to perform the molding of the barrel, the head, the ribs and the ring in a two-part mold with only two movable pins, the ring 4 has a longitudinal front face 4A inscribed in the section of the front opening. of the head. With a substantially circular ring 4 and a front portion 2A of the tubular shaped head with circular section as in the embodiment shown, this implies that the outer radius R4 of the ring must be less than or equal to the inner radius of this part before 2A. This allows the space of each compartment 7 to be formed by a portion of the first spindle and a portion of the second spindle during molding, these two spindle portions having a mutual contact surface that is coaxial with the central axis A. and allowing them to slide in opposite directions relative to each other in the axial direction when the pins are removed upon demolding.

Préférablement, le rayon extérieur R4 de l'anneau est égal au rayon intérieur de la partie avant 2A de la tête. Ceci permet de réaliser un anneau suffisamment épais pour la solidité de l'organe de butée, avec un diamètre inférieur suffisant pour ne pas compromettre la section de passage de l'encre par la portion arrière 32 du connecteur.Preferably, the outer radius R4 of the ring is equal to the inner radius of the front portion 2A of the head. This allows a sufficiently thick ring for the strength of the stop member, with a smaller diameter sufficient to not compromise the passage section of the ink by the rear portion 32 of the connector.

Par ailleurs, du fait de son épaisseur radiale, l'anneau 4 participe au maintien de la matière fibreuse du tampon 6 dans le compartiment réservoir 5 et évite dans une certaine mesure qu'une partie de cette matière fibreuse se déplace vers l'avant et rentre dans les compartiments 7 si l'instrument 1 vient heurter une surface, ce qui est avantageux par rapport au dispositif connu de la figure 7.Moreover, because of its radial thickness, the ring 4 contributes to the maintenance of the fibrous material of the buffer 6 in the reservoir compartment 5 and avoids to a certain extent that part of this fibrous material moves forward and enters the compartments 7 if the instrument 1 hits a surface, which is advantageous compared to the known device of the figure 7 .

La vue en coupe de la figure 4, selon le plan IV-IV de la figure 1, illustre un mode de réalisation avantageux dans lequel le rayon extérieur R4 de l'anneau 4 est compris entre la moitié et les trois quarts du rayon intérieur R1 du fût 10 mesuré au niveau de l'anneau. Ce choix est avantageux pour concilier à la fois un maintien satisfaisant du tampon 6 en cas de choc et une section de passage d'air suffisante entre les compartiments 7 et le compartiment réservoir 5. Ce rayon R4 est par ailleurs égal au rayon intérieur de la partie avant 2A de la tête comme représenté sur la figure 6.The sectional view of the figure 4 according to plan IV-IV of the figure 1 , illustrates an advantageous embodiment in which the outer radius R4 of the ring 4 is between half and three quarters of the inner radius R1 of the barrel 10 measured at the level of the ring. This choice is advantageous for reconciling both a satisfactory maintenance of the buffer 6 in the event of impact and a sufficient air passage section between the compartments 7 and the reservoir compartment 5. This radius R4 is also equal to the inner radius of the front part 2A of the head as shown on the figure 6 .

La figure 5 illustre le fait que la hauteur e des nervures secondaires 21 est inférieure au quart du rayon intérieur du fût, pour laisser un passage d'air suffisant entre le tampon et la paroi intérieure du fût sans pour autant diminuer exagérément le diamètre du tampon par rapport au diamètre intérieur du fût.The figure 5 illustrates that the height e of the secondary ribs 21 is less than one quarter of the inner radius of the barrel, to leave a sufficient air passage between the buffer and the inner wall of the barrel without unduly reducing the diameter of the buffer relative to the inner diameter of the barrel.

Comme représenté sur la vue en coupe de la figure 6, selon le plan VI-VI de la figure 1, la hauteur de chaque nervure longitudinale 20 est relativement faible par rapport au rayon de la portion principale 30 du connecteur, et l'épaisseur d'une nervure est aussi relativement faible. Les dimensions de hauteur et d'épaisseur d'une nervure sont prévues pour assurer une section de passage d'air suffisante dans la partie avant 2A de la tête sans compromettre la rigidité des nervures pour un maintien radial ferme du connecteur.As shown in the sectional view of the figure 6 , according to plan VI-VI of the figure 1 the height of each longitudinal rib 20 is relatively small relative to the radius of the main portion 30 of the connector, and the thickness of a rib is also relatively small. The height and thickness dimensions of a rib are provided to ensure a sufficient air passage section in the front portion 2A of the head without compromising the stiffness of the ribs for a firm radial retention of the connector.

Claims (6)

  1. Writing instrument (1) having a capillary writing tip, comprising:
    - a barrel (10) extending along a central axis (A), comprising a fluid reservoir compartment (5) in which an ink plug (6) comprising a fibrous material is housed,
    - a capillary connector (3) extending from the writing tip to the reservoir compartment (5) substantially along the central axis (A), comprising a main portion (30) having a diameter greater than the diameter of a rear portion (32) so as to create a radial shoulder (31) at the junction of the two portions (30, 32) of the connector (3),
    - a tubular head (2) situated at the front of the barrel with a front part (2A) having a front opening which has an internal cross-section smaller than the internal cross-section of the barrel, and comprising internal longitudinal ribs (20) each having a peak (201), the peaks being adapted for holding said capillary connector (3) radially, said ribs (20) extending rearwards from the front opening of the head (2),
    - a stop element formed by a ring (4) substantially coaxial to the central axis (A) and situated at a distance from the front opening of the head (2), capable of cooperating with said radial shoulder (31) in order to prevent a rearward axial movement of said capillary connector (3);
    - the barrel (10), the head (2), the ribs (20) and the ring (4) being produced in a single moulded piece ;
    characterized in that the ring (4) surrounds and makes contact with a part of the rear portion (32) of the capillary connector (3), and in that said longitudinal ribs (20) extend radially between the ring (4) and the barrel (10) and extend longitudinally up to the level of a rear longitudinal face of the ring, an air passage is formed around the ring (4), and the ring (4) contributes to the holding of the fibrous material of the plug (6) in the reservoir compartment (5)..
  2. Writing instrument according to claim 1, in which the ring (4) has a longitudinal front face (4A) inscribed within the cross-section of the front opening of the head (2).
  3. Writing instrument according to any one of claims 1 and 2, in which the external radius (R4) of the ring (4) is equal to the radius of the radially internal wall of the front part (2A) of the head (2).
  4. Writing instrument according to any one of the previous claims, in which the external radius (R4) of the ring (4) is comprised between half and three quarters of the internal radius (R1) of the barrel (10) at the level of the ring.
  5. Writing instrument according to any one of the previous claims, in which the internal wall of said tubular head (2) is tapered towards the rear.
  6. Writing instrument according to any one of the previous claims, in which said longitudinal ribs (20) are extended in the reservoir compartment (5) by secondary ribs (21), the height (e) of which is less than a quarter of the internal radius of the barrel (10).
EP07766031A 2006-05-12 2007-05-11 Writing instrument having a capillary writing tip Active EP2024191B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0604265A FR2900868B1 (en) 2006-05-12 2006-05-12 WRITING INSTRUMENT HAVING A CAPILLARY WRITING TIP
PCT/FR2007/051253 WO2007132115A2 (en) 2006-05-12 2007-05-11 Writing instrument having a capillary writing tip

Publications (2)

Publication Number Publication Date
EP2024191A2 EP2024191A2 (en) 2009-02-18
EP2024191B1 true EP2024191B1 (en) 2012-02-22

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Application Number Title Priority Date Filing Date
EP07766031A Active EP2024191B1 (en) 2006-05-12 2007-05-11 Writing instrument having a capillary writing tip

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US (1) US8177448B2 (en)
EP (1) EP2024191B1 (en)
AT (1) ATE546298T1 (en)
BR (1) BRPI0711603B1 (en)
CA (1) CA2652004A1 (en)
FR (1) FR2900868B1 (en)
MX (1) MX2008014487A (en)
WO (1) WO2007132115A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9011363B2 (en) * 2012-04-10 2015-04-21 Acclarent, Inc. Tympanic membrane pressure equalization tube
JP6511348B2 (en) * 2015-06-26 2019-05-15 株式会社パイロットコーポレーション Writing instrument
EP3815921A1 (en) * 2019-10-29 2021-05-05 Société BIC Nib for writing felt pen
US20230218481A1 (en) * 2020-04-20 2023-07-13 Taisei Kako Co., Ltd Inside stopper for medical solution applying container and medical solution applying container including same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356440A (en) * 1965-05-25 1967-12-05 Sheaffer W A Pen Co Marking implement
US4341482A (en) * 1980-09-22 1982-07-27 Sanford Research Company Housing assembly for fluid marking device
DE3338227C2 (en) * 1983-10-21 1985-11-28 Mutschler, Otto, 6900 Heidelberg Ink pens for writing implements
DE3705490A1 (en) * 1986-02-21 1987-08-27 Mitsubishi Pencil Co DEVICE FOR APPLYING LIQUID
US5454658A (en) * 1991-01-31 1995-10-03 Pentel Kabushiki Kaisha Rear end knocking type liquid discharge apparatus
JP2000233592A (en) * 1999-02-17 2000-08-29 Pilot Ink Co Ltd Direct ink supply writing utensil
JP4454061B2 (en) * 1999-05-17 2010-04-21 三菱鉛筆株式会社 Writing instrument
US6474887B2 (en) * 2000-09-05 2002-11-05 Sakura Color Products Corporation Applicator
JP2002255255A (en) * 2001-03-01 2002-09-11 Pilot Ink Co Ltd Simple applying utensil

Also Published As

Publication number Publication date
WO2007132115A2 (en) 2007-11-22
ATE546298T1 (en) 2012-03-15
BRPI0711603B1 (en) 2018-05-29
BRPI0711603A2 (en) 2011-12-20
FR2900868A1 (en) 2007-11-16
FR2900868B1 (en) 2011-02-11
US20090226240A1 (en) 2009-09-10
EP2024191A2 (en) 2009-02-18
CA2652004A1 (en) 2007-11-22
US8177448B2 (en) 2012-05-15
WO2007132115A3 (en) 2008-01-17
MX2008014487A (en) 2008-11-27

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