EP3313669A1 - Writing instrument having a multi-use tip - Google Patents

Writing instrument having a multi-use tip

Info

Publication number
EP3313669A1
EP3313669A1 EP16736904.0A EP16736904A EP3313669A1 EP 3313669 A1 EP3313669 A1 EP 3313669A1 EP 16736904 A EP16736904 A EP 16736904A EP 3313669 A1 EP3313669 A1 EP 3313669A1
Authority
EP
European Patent Office
Prior art keywords
writing
distal end
tip
axial direction
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16736904.0A
Other languages
German (de)
French (fr)
Other versions
EP3313669B1 (en
Inventor
Arnaud Bez
Olivier ALBENGE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BIC SA
Original Assignee
BIC SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BIC SA filed Critical BIC SA
Publication of EP3313669A1 publication Critical patent/EP3313669A1/en
Application granted granted Critical
Publication of EP3313669B1 publication Critical patent/EP3313669B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • 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
    • B43K1/00—Nibs; Writing-points
    • B43K1/006—Porous nibs

Definitions

  • the present application relates to the field of writing instruments, and more particularly to writing instruments providing several possibilities of writing with a single point, or writing tip for multiple uses.
  • One embodiment relates to a writing instrument comprising a body and a writing tip mounted on the body, the body and the writing tip extending in an axial direction, the writing tip having a portion of distal end having a U-shaped cross-section.
  • a distal end portion is a portion of the tip that extends from the distal end of the writing tip (ie the distal end of writing) on all or part of the part visible from the tip when the tip is mounted on the body.
  • the distal end portion has the general shape of a U-shaped cross section (ie perpendicular to the axial direction), this section being of course able to evolve along the axial direction, while retaining a general form of "U”.
  • the distal end portion of the writing tip is of substantially parallelepipedal shape having a groove on one of its lateral faces, said groove being open on the distal end of the writing tip.
  • This form of "U” makes it possible to form several portions for writing, these portions being able to be of different sizes, whereby several line widths are possible, while being simple to manufacture and robust.
  • the upper part of the "U” ie the distal ends of the vertical bars of the "U" makes it possible to write by forming two parallel lines (ie a "double” line).
  • the shape of the section of the distal end portion is strictly U-shaped and has no concavity providing some geometric line property that the user can form from the tip other than the concavity of the "U".
  • the distal end portion includes a write distal end, the outer periphery of the "U" shape of the distal writing end forming a plurality of writing edges.
  • Such a tip thus offers the user many writing possibilities, while being simple to achieve and robust. Furthermore, the fact that the writing parts are formed by edges, enhances the accuracy of the writing.
  • the distal end portion includes a distal end face extending substantially transversely to the axial direction while each writing edge is formed by a rounded bevel formed on a portion of the periphery of the distal end face.
  • chamfers are simple to manufacture and robust, and provide many possibilities of use.
  • substantially transversely is meant that the distal end face forms an angle between 60 and 90 ° with the axial direction. It is understood that the writing tip is configured for the user to write with chamfered edges, and not with the distal end face. Such chamfered edges are simple to manufacture while providing high writing accuracy. For example, the shapes of the chamfers result from the molding of the writing tip, i.e. no machining after molding is required to obtain these chamfers.
  • the shape of the cross section of the distal end portion (ie the "U") has an axial plane of symmetry. In particular, it ensures that the two vertical bars of the "U" are similar. This provides greater ease of use, greater versatility, further facilitates manufacturing and improves robustness. In particular, such symmetry allows the same comfort of use for both right-handed and left-handed.
  • the outer face of the portion of the distal end portion forming the bottom horizontal bar of the "U" is inclined with respect to the axial direction.
  • this face is flat.
  • Such inclination forms a clearance providing a certain comfort of use, while being simple to manufacture ensuring the robustness of the tip.
  • the writing tip has a distal end of writing, while the inner face of the portion of the distal end portion forming the lower horizontal bar of the "U", in the vicinity of the end distal writing, is curved in the axial direction and follows a profile of the taper type variable radius in the axial direction.
  • vicinity of the distal writing end is meant that portion of the distal end portion adjacent to the distal writing end.
  • the profile responds to the equation:
  • x represents the abscissa in the axial direction
  • y represents the ordinate in the direction of the thickness of the horizontal bar of the "U"
  • a: is a positive real number
  • b is a positive real number between 0.2 x a and 0.8 x a (i.e. 0.2 multiplied by a and 0.8 multiplied by a)
  • the distal end portion has such a profile from the distal end of the tip, and may optionally have a profile of another shape in the axial direction beyond this curved profile going towards the proximal end of the tip, but not necessarily.
  • this other profile is constant in the axial direction.
  • Such a conical type profile makes it possible to ensure that, in the axial direction, the cavity of the "U" will be minimized over the majority of the axial and maximum end portion at the distal end itself, and this following a non-linear evolution in the axial direction.
  • the distal end portion includes a distal end face, the thickness of each of the bars forming the "U" of the distal end face is between 0.5 mm (five tenths of a millimeter) and 1.0 mm (one millimeter).
  • each of the bars of the "U" of the distal end face has such a thickness.
  • Such a thickness makes it possible to ensure the rigidity and the mechanical strength of the tip when the user presses on it to write while being easy to manufacture.
  • the writing tip is sintered powder.
  • the powder is a plastic powder such as polyethylene (also known by the acronym "PE").
  • PE polyethylene
  • Such a material, and the method of implementation by sintering is particularly well suited to large scale production of such a writing tip, which is therefore easy to manufacture and robust.
  • the writing instrument forms a highlighter.
  • Such a writing instrument is particularly well suited for forming a highlighter.
  • FIG. 1 represents a highlighter seen in perspective
  • FIG. 2 represents the tip of the highlighter of FIG. 1, seen in perspective
  • FIG. 3 represents a cross-section of the distal end portion of the writing tip of FIG. 2, according to plane III,
  • FIG. 4 represents the writing tip of FIG. 2, seen along arrow IV of FIG. 2, and
  • FIG. 5 shows an axial section of the writing tip of Figure 2, according to the plane V.
  • FIG. 1 represents a writing instrument 10, in this example a highlighter 10, comprising a body 12, a writing tip 14 and a cap 16.
  • the writing instrument 10, and more particularly the body 12 and the writing tip 14 extend in an axial direction X.
  • the writing tip 14 includes a write distal end 14A and a proximal end 14B.
  • the proximal end 14B is in fluidic contact with an ink reservoir (not shown) disposed within the body 10 to provide ink supply for the writing tip 14.
  • the writing tip 14 comprises a portion 15A which is visible when the tip 14 is mounted on the body 12 and a portion 15B which serves to mount it on the body 12.
  • the portion 15A comprises a proximal face 15AA which forms a shoulder configured to cooperate in abutment with the body 12. This shoulder serves in particular to block the tip 14 so that the portion 15A remains outside the body 12 when uses the writing tip 14.
  • the writing tip 14 includes a distal end portion 18, which extends about 75% of the length in the axial direction of the portion 15A. As shown in Figures 2 and 3, the cross section of the distal end portion 18 is U-shaped. The distal end portion 18, and more generally in this example the entire writing tip 14, has an axial plane of symmetry P. The distal end portion 18 includes the distal write end 14A, which in this example forms a distal end face 18A. The distal end face 18A includes an inner periphery 190 and an outer periphery 180 of the "U" shape.
  • the outer periphery 180 of the "U" shape of the distal end 14A forms a plurality of writing edges 180A.
  • the writing edges 180A are formed by rounded chamfers made on the periphery of the distal end face 18A.
  • the distal end face 18A of course has a "U" shape.
  • the thickness and the vertical bars of the "U" of the distal end face 18A is between 0.5 mm and 1.0 mm.
  • the thickness e2 of the horizontal bar of the "U" of the distal end face 18A is also between 0.5mm and 1.0mm. In this example, el is 0.81mm while e2 is 0.75mm.
  • el is 0.81mm while e2 is 0.75mm.
  • the portion 18B of the distal end portion 18 which forms the bottom horizontal bar of the "U" has an outer face 18BA which is inclined relative to in the axial direction X.
  • the inclination of the outer face 18BA is such that the thickness E of the portion 18B is decreasing towards the distal end 14A (ie in the direction proximal end 14B to distal end 14A).
  • the portion 18B has an inner face 18BB which is curved in the axial direction X in the vicinity of the distal end 14A and follows a conical profile of variable radius in the axial direction X from the distal end 14A.
  • the curve of the inner face 18BB is such that the thickness E of the portion 18B is decreasing going towards the distal end 14A (ie in the direction proximal end 14B to distal end 14A).
  • x represents the abscissa in the axial direction
  • y represents the ordinate along the direction of the thickness E of the horizontal bar of the "U”.
  • the ellipse defined by equation (3) is represented in broken lines on the magnifying glass of figure 5, as well as the axes of the x and y coordinates, the center of the ellipse corresponding, of course, at the origin of the coordinates ( x, y).
  • the inner face 18BB has a distal portion 18BB1 having, in the axial direction X, a profile of the conical type with a variable radius in the axial direction X corresponding to the equation (3) and a proximal portion 18BB2 presenting a constant rectilinear profile in the axial direction X which connects continuously to the profile of the conical type.
  • a fillet 18C makes it possible to connect the inner face 18BB to the remainder of the wall of the tip while ensuring a geometrical continuity in the axial direction X.
  • the conical-type curve profile of the distal portion 18BB1 is also connected continues to the distal end face 18A.
  • the writing tip 14 is in sintered powder.
  • the powder is polyethylene.

Landscapes

  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

The invention relates to a writing instrument which comprises a body (12) and a writing tip (14) mounted on the body (12), the body (12) and the writing tip (14) extending in an axial direction (X), the writing tip (14) having a distal end portion (18) having a U-shaped cross-section.

Description

Instrument d'écriture à pointe à usage multiple  Multipurpose tip writing instrument
DOMAINE DE L'INVENTION  FIELD OF THE INVENTION
La présente demande concerne le domaine des instruments d'écriture, et plus particulièrement des instruments d'écriture procurant plusieurs possibilités d'écriture avec une seule et même pointe, ou à pointe d'écriture à usages multiple.  The present application relates to the field of writing instruments, and more particularly to writing instruments providing several possibilities of writing with a single point, or writing tip for multiple uses.
ETAT DE LA TECHNIQUE ANTERIEURE  STATE OF THE PRIOR ART
On connaît de nombreux instruments d'écritures. Toutefois, aucun instrument d'écriture connu ne présente un seule et unique pointe simple à fabriquer, robuste, et présentant de plusieurs possibilités d'écriture différentes. Il existe donc un besoin en ce sens  Many instruments of writing are known. However, no known writing instrument has a single tip simple to manufacture, robust, and having several different writing possibilities. There is therefore a need in this regard
PRESENTATION DE L'INVENTION  PRESENTATION OF THE INVENTION
Un mode de réalisation concerne un instrument d'écriture comprenant un corps et une pointe d'écriture montée sur le corps, le corps et la pointe d'écriture s'étendant selon une direction axiale, la pointe d'écriture présentant une portion d'extrémité distale ayant une section transversale en forme de « U ».  One embodiment relates to a writing instrument comprising a body and a writing tip mounted on the body, the body and the writing tip extending in an axial direction, the writing tip having a portion of distal end having a U-shaped cross-section.
On comprend qu'une « portion d'extrémité distale » est une portion de la pointe qui s'étend depuis l'extrémité distale de la pointe d'écriture (i.e. l'extrémité distale d'écriture) sur tout ou partie de la partie visible de la pointe lorsque la pointe est montée sur le corps.  It is understood that a "distal end portion" is a portion of the tip that extends from the distal end of the writing tip (ie the distal end of writing) on all or part of the part visible from the tip when the tip is mounted on the body.
On comprend donc que la portion d'extrémité distale présente la forme générale d'un profilé de section transverse (i.e. perpendiculaire à la direction axiale) en forme de « U », cette section pouvant bien entendu évoluer selon la direction axiale, tout en conservant une forme générale de « U ». En d'autres termes, la portion d'extrémité distale de la pointe d'écriture est de forme sensiblement parallélépipédique présentant une rainure sur une de ses faces latérales, ladite rainure étant débouchante sur l'extrémité distale de la pointe d'écriture.  It is thus clear that the distal end portion has the general shape of a U-shaped cross section (ie perpendicular to the axial direction), this section being of course able to evolve along the axial direction, while retaining a general form of "U". In other words, the distal end portion of the writing tip is of substantially parallelepipedal shape having a groove on one of its lateral faces, said groove being open on the distal end of the writing tip.
Cette forme de « U » permet de former plusieurs portions permettant d'écrire, ces portions pouvant être de dimensions différentes, grâce à quoi plusieurs largeurs de traits sont possibles, tout en étant simple à fabriquer et robuste. De plus, la partie supérieure du « U » (i.e. les extrémités distales des barres verticales du « U »), permet d'écrire en formant deux traits parallèles (i.e. un trait « double »). En d'autres termes, la forme de la section de la portion d'extrémité distale est strictement en forme de « U » et ne présente aucune concavité procurant une certaine propriété géométrique au trait que l'utilisateur peut former à partir de la pointe autre que la concavité du « U ». This form of "U" makes it possible to form several portions for writing, these portions being able to be of different sizes, whereby several line widths are possible, while being simple to manufacture and robust. In addition, the upper part of the "U" (ie the distal ends of the vertical bars of the "U") makes it possible to write by forming two parallel lines (ie a "double" line). In other words, the shape of the section of the distal end portion is strictly U-shaped and has no concavity providing some geometric line property that the user can form from the tip other than the concavity of the "U".
Dans certains modes de réalisation, la portion d'extrémité distale comprend une extrémité distale d'écriture, le pourtour extérieur de la forme en « U » de l'extrémité distale d'écriture formant une pluralité de bords d'écriture.  In some embodiments, the distal end portion includes a write distal end, the outer periphery of the "U" shape of the distal writing end forming a plurality of writing edges.
On comprend donc qu'à l'exception du contour intérieur de la forme en « U » (i.e. les bords de la concavité du « U »), tous les bords formant le pourtour de la forme en « U » forment chacun un bord d'écriture, i.e. un bord par lequel l'utilisateur peut écrire. La pointe forme ainsi trois bords d'écriture simple (face inférieure extérieure du « U » et les deux faces latérales extérieures du « U »), et un bord pour une écriture « double » (deux faces supérieures extérieure des barres verticales du « U »).  It is therefore understood that with the exception of the inner contour of the "U" shape (ie the edges of the concavity of the "U"), all the edges forming the periphery of the "U" shape each form an edge. writing, ie an edge by which the user can write. The tip thus forms three simple writing edges (the outer lower face of the "U" and the two outer lateral faces of the "U"), and one edge for a "double" writing (two upper outer faces of the vertical bars of the "U" ").
Une telle pointe offre ainsi à l'utilisateur de nombreuses possibilités d'écriture, tout en étant simple à réaliser et robuste. Par ailleurs, le fait que les parties d'écriture soient formées par des bords, renforce la précision de l'écriture.  Such a tip thus offers the user many writing possibilities, while being simple to achieve and robust. Furthermore, the fact that the writing parts are formed by edges, enhances the accuracy of the writing.
Dans certains modes de réalisation, la portion d'extrémité distale comprend une face d'extrémité distale s'étendant sensiblement transversalement à la direction axiale tandis que chaque bord d'écriture est formé par un chanfrein arrondi formé sur une portion de la périphérie de la face d'extrémité distale. De tels chanfreins sont simples à fabriquer et robustes, et procurent de nombreuses possibilités d'utilisation.  In some embodiments, the distal end portion includes a distal end face extending substantially transversely to the axial direction while each writing edge is formed by a rounded bevel formed on a portion of the periphery of the distal end face. Such chamfers are simple to manufacture and robust, and provide many possibilities of use.
Par « sensiblement transversalement », on entend que la face d'extrémité distale forme un angle compris entre 60 et 90° avec la direction axiale. On comprend que la pointe d'écriture est configurée pour que l'utilisateur écrive avec les bords chanfreinés, et pas avec la face d'extrémité distale. De tels bords chanfreinés sont simples à fabriquer tout en procurant une grande précision d'écriture. Par exemple, les formes des chanfreins résultent du moulage de la pointe d'écriture, i.e. aucun usinage après le moulage n'est nécessaire pour obtenir ces chanfreins.  By "substantially transversely" is meant that the distal end face forms an angle between 60 and 90 ° with the axial direction. It is understood that the writing tip is configured for the user to write with chamfered edges, and not with the distal end face. Such chamfered edges are simple to manufacture while providing high writing accuracy. For example, the shapes of the chamfers result from the molding of the writing tip, i.e. no machining after molding is required to obtain these chamfers.
Dans certains modes de réalisation, la forme de la section transversale de la portion d'extrémité distale (i.e. le « U ») présente un plan axial de symétrie. Notamment, on assure ainsi que les deux barres verticales du « U » sont similaires. Ceci procure une plus grande facilité d'utilisation, une plus grande polyvalence, facilite encore la fabrication et améliore la robustesse. En particulier, une telle symétrie permet le même confort d'utilisation tant pour les droitiers que pour les gauchers. In some embodiments, the shape of the cross section of the distal end portion (ie the "U") has an axial plane of symmetry. In particular, it ensures that the two vertical bars of the "U" are similar. This provides greater ease of use, greater versatility, further facilitates manufacturing and improves robustness. In particular, such symmetry allows the same comfort of use for both right-handed and left-handed.
Dans certains modes de réalisation, la face extérieure de la partie de la portion d'extrémité distale formant la barre horizontale inférieure du « U » est inclinée par rapport à la direction axiale.  In some embodiments, the outer face of the portion of the distal end portion forming the bottom horizontal bar of the "U" is inclined with respect to the axial direction.
Par exemple, cette face est plane. Une telle inclinaison forme un dégagement procurant un certain confort d'utilisation, tout en étant simple à fabriquer en assurant la robustesse de la pointe.  For example, this face is flat. Such inclination forms a clearance providing a certain comfort of use, while being simple to manufacture ensuring the robustness of the tip.
Dans certains modes de réalisation, la pointe d'écriture présente une extrémité distale d'écriture, tandis que la face intérieure de la partie de la portion d'extrémité distale formant la barre horizontale inférieure du « U », au voisinage de l'extrémité distale d'écriture, est courbe selon la direction axiale et suit un profil du type conique à rayon variable selon la direction axiale.  In some embodiments, the writing tip has a distal end of writing, while the inner face of the portion of the distal end portion forming the lower horizontal bar of the "U", in the vicinity of the end distal writing, is curved in the axial direction and follows a profile of the taper type variable radius in the axial direction.
Par « voisinage de l'extrémité distale d'écriture » on entend la partie de la portion d'extrémité distale adjacente à l'extrémité distale d'écriture.  By "vicinity of the distal writing end" is meant that portion of the distal end portion adjacent to the distal writing end.
Par exemple, le profil répond à l'équation : For example, the profile responds to the equation:
où :  or :
x : représente l'abscisse selon la direction axiale,  x: represents the abscissa in the axial direction,
y : représente l'ordonnée selon la direction de l'épaisseur de la barre horizontale du « U »,  y: represents the ordinate in the direction of the thickness of the horizontal bar of the "U",
a : est un nombre réel positif  a: is a positive real number
b : est un nombre réel positif compris entre 0.2 x a et 0.8 x a (i.e. 0.2 multiplié par a et 0.8 multiplié par a)  b: is a positive real number between 0.2 x a and 0.8 x a (i.e. 0.2 multiplied by a and 0.8 multiplied by a)
On comprend donc que la portion d'extrémité distale présente un tel profil depuis l'extrémité distale de la pointe, et peut éventuellement présenter un profil d'une autre forme selon la direction axiale au-delà de ce profil courbe en allant vers l'extrémité proximale de la pointe, mais pas nécessairement. Par exemple cet autre profil est constant selon la direction axiale. Un tel profil de type conique permets de s'assurer que, selon la direction axiale, la cavité du « U » sera minimisée sur la majorité de la portion d'extrémité axiale et maximale à l'extrémité distale elle-même, et ce suivant une évolution non-linéaire selon la direction axiale. Ceci permets de ménager un dégagement formé par la cavité interne du « U » suffisant pour procurer un confort d'utilisation suffisant, en particulier lorsque l'utilisateur utilise la partie supérieure du « U », tout en procurant à la portion d'extrémité distale une rigidité suffisante, par l'épaisseur de matière, pour qu'elle ne se déforme pas ou de manière acceptable. Ce profil est donc facile à fabriquer et procure une certaine robustesse à la pointe. It is therefore understood that the distal end portion has such a profile from the distal end of the tip, and may optionally have a profile of another shape in the axial direction beyond this curved profile going towards the proximal end of the tip, but not necessarily. For example, this other profile is constant in the axial direction. Such a conical type profile makes it possible to ensure that, in the axial direction, the cavity of the "U" will be minimized over the majority of the axial and maximum end portion at the distal end itself, and this following a non-linear evolution in the axial direction. This allows for a clearance formed by the internal cavity of the "U" sufficient to provide sufficient comfort of use, especially when the user uses the top of the "U", while providing the distal end portion a sufficient rigidity, by the thickness of material, so that it does not deform or acceptable manner. This profile is easy to manufacture and provides some strength at the tip.
Dans certains modes de réalisation, la portion d'extrémité distale comprend une face d'extrémité distale, l'épaisseur de chacune des barres formant le « U » de la face d'extrémité distale est comprise entre 0.5 mm (cinq dixièmes de millimètre) et 1.0 mm (un millimètre).  In some embodiments, the distal end portion includes a distal end face, the thickness of each of the bars forming the "U" of the distal end face is between 0.5 mm (five tenths of a millimeter) and 1.0 mm (one millimeter).
On comprend donc que chacune des barres du « U » de la face d'extrémité distale présente une telle épaisseur. Une telle épaisseur permet de s'assurer de la rigidité et de la tenue mécanique de la pointe lorsque l'utilisateur appuie dessus pour écrire tout en étant facile à fabriquer.  It is therefore understood that each of the bars of the "U" of the distal end face has such a thickness. Such a thickness makes it possible to ensure the rigidity and the mechanical strength of the tip when the user presses on it to write while being easy to manufacture.
Dans certains modes de réalisation, la pointe d'écriture est en poudre frittée.  In some embodiments, the writing tip is sintered powder.
Par exemple la poudre est une poudre de plastique telle que du polyéthylène (également connu sous l'acronyme « PE »). Un tel matériau, et le procédé de mise en œuvre par frittage est particulièrement bien adapté à la production à grande échelle d'une telle pointe d'écriture, qui est donc facile à fabriquer et robuste.  For example, the powder is a plastic powder such as polyethylene (also known by the acronym "PE"). Such a material, and the method of implementation by sintering is particularly well suited to large scale production of such a writing tip, which is therefore easy to manufacture and robust.
Dans certains modes de réalisation, l'instrument d'écriture forme un surligneur.  In some embodiments, the writing instrument forms a highlighter.
Un tel instrument d'écriture est particulièrement bien adapté pour former un surligneur.  Such a writing instrument is particularly well suited for forming a highlighter.
BREVE DESCRIPTION DES DESSINS  BRIEF DESCRIPTION OF THE DRAWINGS
L'invention et ses avantages seront mieux compris à la lecture de la description détaillée faite ci-après de différents modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. Cette description fait référence aux pages de figures annexées, sur lesquelles : - la figure 1 représente un surligneur vu en perspective, The invention and its advantages will be better understood on reading the detailed description given below of various embodiments of the invention given as non-limiting examples. This description refers to the pages of annexed figures, in which: FIG. 1 represents a highlighter seen in perspective,
- la figure 2 représente la pointe du surligneur de la figure 1, vue en perspective,  FIG. 2 represents the tip of the highlighter of FIG. 1, seen in perspective;
- la figure 3, représente une coupe transversale de la portion d'extrémité distale de la pointe d'écriture de la figure 2, selon le plan III,  FIG. 3 represents a cross-section of the distal end portion of the writing tip of FIG. 2, according to plane III,
- la figure 4 représente la pointe d'écriture de la figure 2, vue selon la flèche IV de la figure 2, et  FIG. 4 represents the writing tip of FIG. 2, seen along arrow IV of FIG. 2, and
- la figure 5 représente une coupe axiale de la pointe d'écriture de la figure 2, selon le plan V.  - Figure 5 shows an axial section of the writing tip of Figure 2, according to the plane V.
DESCRIPTION DETAILLEE D'EXEMPLES DE REALISATION  DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Un mode de réalisation de l'invention est décrit en référence aux figures 1 à 5. La figure 1 représente un instrument d'écriture 10, dans cet exemple un surligneur 10, comprenant un corps 12, une pointe d'écriture 14 et un capuchon 16. L'instrument d'écriture 10, et plus particulièrement le corps 12 et la pointe d'écriture 14 s'étendent selon une direction axiale X.  One embodiment of the invention is described with reference to FIGS. 1 to 5. FIG. 1 represents a writing instrument 10, in this example a highlighter 10, comprising a body 12, a writing tip 14 and a cap 16. The writing instrument 10, and more particularly the body 12 and the writing tip 14 extend in an axial direction X.
La pointe d'écriture 14 comprend une extrémité distale d'écriture 14A et une extrémité proximale 14B. L'extrémité proximale 14B est mise en contact fluidique avec un réservoir d'encre (non représenté) disposé au sein du corps 10, pour assurer l'alimentation en encre de la pointe d'écriture 14. Plus particulièrement la pointe d'écriture 14 comprend une portion 15A qui est visible lorsque la pointe 14 est montée sur le corps 12 et une portion 15B qui sert à son montage sur le corps 12.  The writing tip 14 includes a write distal end 14A and a proximal end 14B. The proximal end 14B is in fluidic contact with an ink reservoir (not shown) disposed within the body 10 to provide ink supply for the writing tip 14. More particularly, the writing tip 14 comprises a portion 15A which is visible when the tip 14 is mounted on the body 12 and a portion 15B which serves to mount it on the body 12.
La portion 15A comprend une face proximale 15AA qui forme un épaulement configuré pour coopérer en appui avec le corps 12. Cet épaulement sert notamment à bloquer la pointe 14 de manière à ce que la portion 15A reste à l'extérieur du corps 12 lorsqu'on utilise la pointe d'écriture 14.  The portion 15A comprises a proximal face 15AA which forms a shoulder configured to cooperate in abutment with the body 12. This shoulder serves in particular to block the tip 14 so that the portion 15A remains outside the body 12 when uses the writing tip 14.
La pointe d'écriture 14 comprend une portion d'extrémité distale 18, qui s'étend sur environ 75% de la longueur selon la direction axiale de la portion 15A. Comme cela est représenté sur les figures 2 et 3, la section transverse de la portion d'extrémité distale 18 est en forme de « U ». La portion d'extrémité distale 18, et plus généralement dans cet exemple toute la pointe d'écriture 14, présente un plan axial de symétrie P. La portion d'extrémité distale 18 comprend l'extrémité distale d'écriture 14A, qui dans cet exemple forme une face d'extrémité distale 18A. La face d'extrémité distale 18A comprend un pourtour intérieur 190 et un pourtour extérieur 180 de la forme en « U ». De manière générale, et sauf indication contraire, on notera que les adjectifs « intérieur » et « extérieur » sont à comprendre relativement à la cavité du « U », c'est-à- dire à l'intérieur de la cavité du « U » ou à l'extérieur de la cavité du « U ». Le pourtour extérieur 180 de la forme en « U » de l'extrémité distale 14A forme une pluralité de bords d'écriture 180A. Dans cet exemple, les bords d'écritures 180A sont formés par des chanfreins arrondis réalisés sur la périphérie de la face d'extrémité distale 18A. The writing tip 14 includes a distal end portion 18, which extends about 75% of the length in the axial direction of the portion 15A. As shown in Figures 2 and 3, the cross section of the distal end portion 18 is U-shaped. The distal end portion 18, and more generally in this example the entire writing tip 14, has an axial plane of symmetry P. The distal end portion 18 includes the distal write end 14A, which in this example forms a distal end face 18A. The distal end face 18A includes an inner periphery 190 and an outer periphery 180 of the "U" shape. In general, and unless otherwise indicated, it will be noted that the adjectives "inside" and "outside" are to be understood relative to the cavity of the "U", that is to say inside the cavity of the "U". Or outside the "U" cavity. The outer periphery 180 of the "U" shape of the distal end 14A forms a plurality of writing edges 180A. In this example, the writing edges 180A are formed by rounded chamfers made on the periphery of the distal end face 18A.
La face d'extrémité distale 18A présente bien entendu une forme en « U ». L'épaisseur el des barres verticales du « U » de la face d'extrémité distale 18A est comprise entre 0.5 mm et 1.0 mm. L'épaisseur e2 de la barre horizontale du « U » de la face d'extrémité distale 18A est également comprise entre 0.5mm et 1.0mm. Dans cet exemple, el est égal à 0.81mm tandis que e2 est égal à 0.75mm. De manière générale, pour assurer une bonne tenue mécanique de la pointe, au plus e2 est petit, au plus el doit être grand. Les inventeurs ont constaté que la relation suivante permet de fabriquer des pointes satisfaisantes du point de vue de la tenue mécanique :  The distal end face 18A of course has a "U" shape. The thickness and the vertical bars of the "U" of the distal end face 18A is between 0.5 mm and 1.0 mm. The thickness e2 of the horizontal bar of the "U" of the distal end face 18A is also between 0.5mm and 1.0mm. In this example, el is 0.81mm while e2 is 0.75mm. In general, to ensure a good mechanical strength of the tip, at most e2 is small, at most el must be large. The inventors have found that the following relationship makes it possible to produce tips that are satisfactory from the point of view of the mechanical strength:
e2 < el < 2 x e2 (2) Comme cela est représenté sur la figure 5, la partie 18B de la portion d'extrémité distale 18 qui forme la barre horizontale inférieure du « U » présente une face extérieure 18BA qui est inclinée par rapport à la direction axiale X. Bien entendu, et de manière générale, l'inclinaison de la face extérieure 18BA est telle que l'épaisseur E de la partie 18B est décroissante en allant vers l'extrémité distale 14A (i.e. selon le sens extrémité proximale 14B vers extrémité distale 14A).  e2 <el <2 x e2 (2) As shown in Fig. 5, the portion 18B of the distal end portion 18 which forms the bottom horizontal bar of the "U" has an outer face 18BA which is inclined relative to in the axial direction X. Of course, and in general, the inclination of the outer face 18BA is such that the thickness E of the portion 18B is decreasing towards the distal end 14A (ie in the direction proximal end 14B to distal end 14A).
La partie 18B présente une face intérieure 18BB qui est courbe selon la direction axiale X au voisinage de l'extrémité distale 14A et suit un profil du type conique à rayon variable selon la direction axiale X à partir de l'extrémité distale 14A. Bien entendu, et de manière générale, au voisinage de l'extrémité distale 14A, la courbe de la face intérieure 18BB est telle que l'épaisseur E de la partie 18B est décroissante en allant vers l'extrémité distale 14A (i.e. selon le sens extrémité proximale 14B vers extrémité distale 14A). The portion 18B has an inner face 18BB which is curved in the axial direction X in the vicinity of the distal end 14A and follows a conical profile of variable radius in the axial direction X from the distal end 14A. Of course, and generally, in the vicinity of the distal end 14A, the curve of the inner face 18BB is such that the thickness E of the portion 18B is decreasing going towards the distal end 14A (ie in the direction proximal end 14B to distal end 14A).
Dans cet exemple, le profil conique à rayon variable selon la direction axiale est défini par l'équation : In this example, the conical profile with variable radius in the axial direction is defined by the equation:
où :  or :
x : représente l'abscisse selon la direction axiale, et  x: represents the abscissa in the axial direction, and
y : représente l'ordonnée selon la direction de l'épaisseur E de la barre horizontale du « U ».  y: represents the ordinate along the direction of the thickness E of the horizontal bar of the "U".
L'ellipse définie par l'équation (3) est représentée en trait discontinu sur la loupe de la figure 5, ainsi que les axes des coordonnées x et y, le centre de l'ellipse correspondant bien entendu à l'origine des coordonnées (x, y).  The ellipse defined by equation (3) is represented in broken lines on the magnifying glass of figure 5, as well as the axes of the x and y coordinates, the center of the ellipse corresponding, of course, at the origin of the coordinates ( x, y).
Ainsi, dans cet exemple, la face intérieure 18BB présente une portion distale 18BB1 présentant, selon la direction axiale X, un profil du type conique à rayon variable selon la direction axiale X répondant à l'équation (3) et une portion proximale 18BB2 présentant un profil constant rectiligne selon la direction axiale X qui se raccorde de manière continue au profil du type conique. Dans cet exemple, un congé 18C permet de raccorder la face intérieure 18BB au reste de la paroi de la pointe tout en assurant une continuité géométrique selon la direction axiale X. Le profil courbe du type conique de la portion distale 18BB1 se raccorde également de manière continue à la face d'extrémité distale 18A.  Thus, in this example, the inner face 18BB has a distal portion 18BB1 having, in the axial direction X, a profile of the conical type with a variable radius in the axial direction X corresponding to the equation (3) and a proximal portion 18BB2 presenting a constant rectilinear profile in the axial direction X which connects continuously to the profile of the conical type. In this example, a fillet 18C makes it possible to connect the inner face 18BB to the remainder of the wall of the tip while ensuring a geometrical continuity in the axial direction X. The conical-type curve profile of the distal portion 18BB1 is also connected continues to the distal end face 18A.
Dans cet exemple, la pointe d'écriture 14 est en poudre frittée. Dans cet exemple, la poudre est du polyéthylène.  In this example, the writing tip 14 is in sintered powder. In this example, the powder is polyethylene.
Bien entendu, d'autres matériaux et/ou d'autres modes de fabrication (autre que le frittage) peuvent également servir à fabriquer la pointe d'écriture 14.  Of course, other materials and / or other methods of manufacture (other than sintering) can also be used to manufacture the writing tip 14.
Bien que la présente invention ait été décrite en se référant à des exemples de réalisation spécifiques, il est évident que des modifications et des changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications. En particulier, des caractéristiques individuelles des différents modes de réalisation illustrés/mentionnés peuvent être combinées dans des modes de réalisation additionnels. Par conséquent, la description et les dessins doivent être considérés dans un sens illustratif plutôt que restrictif. Although the present invention has been described with reference to specific exemplary embodiments, it is obvious that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. In particular, individual features of the various embodiments illustrated / mentioned can be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

Claims

REVENDICATIONS
1. Instrument d'écriture comprenant un corps (12) et une pointe d'écriture (14) montée sur le corps (12), le corps (12) et la pointe d'écriture (14) s'étendant selon une direction axiale (X), la pointe d'écriture (14) présentant une portion d'extrémité distale (18) ayant une section transversale perpendiculaire à la direction axiale (X) en forme de « U ». A writing instrument comprising a body (12) and a writing tip (14) mounted on the body (12), the body (12) and the writing tip (14) extending in an axial direction (X), the writing tip (14) having a distal end portion (18) having a cross section perpendicular to the "U" shaped axial direction (X).
2. Instrument d'écriture selon la revendication 1, dans lequel la portion d'extrémité distale (18) comprend une extrémité distale d'écriture (14A), le pourtour extérieur (180) de la forme en « U » de l'extrémité distale d'écriture (14A) formant une pluralité de bords d'écriture (180A).  The writing instrument of claim 1, wherein the distal end portion (18) comprises a write distal end (14A), the outer periphery (180) of the "U" shape of the end writing distal (14A) forming a plurality of writing edges (180A).
3. Instrument d'écriture selon la revendication 2, dans lequel la portion d'extrémité distale (18) comprend une face d'extrémité distale (18A) s'étendant sensiblement transversalement à la direction axiale (X) tandis que chaque bord d'écriture (180A) est formé par un chanfrein arrondi formé sur une portion de la périphérie de la face d'extrémité distale (18A).  The writing instrument of claim 2, wherein the distal end portion (18) comprises a distal end face (18A) extending substantially transversely to the axial direction (X) while each edge of writing (180A) is formed by a rounded bevel formed on a portion of the periphery of the distal end face (18A).
4. Instrument d'écriture selon l'une quelconque des revendications 1 à 4, dans lequel la forme de la section transversale de la portion d'extrémité distale (18) présente un plan axial de symétrie (P).Writing instrument according to any one of claims 1 to 4, wherein the shape of the cross section of the distal end portion (18) has an axial plane of symmetry (P).
5. Instrument d'écriture selon l'une quelconque des revendications 1 à 4, dans lequel la face extérieure (18BA) de la partie (18B) de la portion d'extrémité distale (18) formant la barre horizontale inférieure du « U » est inclinée par rapport à la direction axiale (X).Writing instrument according to any one of claims 1 to 4, wherein the outer face (18BA) of the portion (18B) of the distal end portion (18) forming the lower horizontal bar of the "U" is inclined with respect to the axial direction (X).
6. Instrument d'écriture selon l'une quelconque des revendications 1 à 4, dans lequel la pointe d'écriture présente une extrémité distale d'écriture, tandis que la face intérieure (18BB) de la partie (18B) de la portion d'extrémité distale (18) formant la barre horizontale inférieure du « U », au voisinage de l'extrémité distale d'écriture (14A), est courbe selon la direction axiale (X) et suit un profil du type conique à rayon variable selon la direction axiale (X). The writing instrument according to any one of claims 1 to 4, wherein the writing tip has a distal write end, while the inner face (18BB) of the portion (18B) of the writing portion. the distal end (18) forming the lower horizontal bar of the "U", in the vicinity of the distal writing end (14A), is curved in the axial direction (X) and follows a profile of the conical type with a variable radius according to the axial direction (X).
7. Instrument d'écriture selon l'une quelconque des revendications 1 à 6, dans lequel la portion d'extrémité distale (18) comprend une face d'extrémité distale (18A), l'épaisseur (el, e2) de chacune des barres formant le « U » de la face d'extrémité distale (18A) est comprise entre 0.5 mm et 1.0 mm. The writing instrument of any one of claims 1 to 6, wherein the distal end portion (18) comprises a distal end face (18A), the thickness (el, e2) of each of bars forming the "U" of the distal end face (18A) is between 0.5 mm and 1.0 mm.
8. Instrument d'écriture selon l'une quelconque des revendications 1 àWriting instrument according to one of claims 1 to
7, dans lequel la pointe d'écriture (14) est en poudre frittée. 7, wherein the writing tip (14) is sintered powder.
9. Instrument d'écriture selon l'une quelconque des revendications 1 à9. Writing instrument according to any one of claims 1 to
8, formant un surligneur (10). 8, forming a highlighter (10).
EP16736904.0A 2015-06-24 2016-06-15 Writing instrument having a multi-use tip Active EP3313669B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1555813A FR3037861B1 (en) 2015-06-24 2015-06-24 MULTI-PURPOSE POINT WRITING INSTRUMENT
PCT/FR2016/051450 WO2016207518A1 (en) 2015-06-24 2016-06-15 Writing instrument having a multi-use tip

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EP3313669A1 true EP3313669A1 (en) 2018-05-02
EP3313669B1 EP3313669B1 (en) 2019-08-07

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US (1) US10589561B2 (en)
EP (1) EP3313669B1 (en)
KR (1) KR20180020266A (en)
CN (1) CN107810114B (en)
FR (1) FR3037861B1 (en)
WO (1) WO2016207518A1 (en)
ZA (1) ZA201708124B (en)

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EP4011640A4 (en) * 2019-08-09 2023-08-23 Mitsubishi Pencil Company, Limited Writing implement

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Also Published As

Publication number Publication date
KR20180020266A (en) 2018-02-27
FR3037861B1 (en) 2020-10-09
EP3313669B1 (en) 2019-08-07
FR3037861A1 (en) 2016-12-30
US20180186171A1 (en) 2018-07-05
WO2016207518A1 (en) 2016-12-29
US10589561B2 (en) 2020-03-17
ZA201708124B (en) 2019-06-26
CN107810114B (en) 2019-05-31
CN107810114A (en) 2018-03-16

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