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WO1998008693A1 - Ball-bearing tip for ball-point pen - Google Patents

Ball-bearing tip for ball-point pen Download PDF

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Publication number
WO1998008693A1
WO1998008693A1 PCT/IB1997/000228 IB9700228W WO9808693A1 WO 1998008693 A1 WO1998008693 A1 WO 1998008693A1 IB 9700228 W IB9700228 W IB 9700228W WO 9808693 A1 WO9808693 A1 WO 9808693A1
Authority
WO
WIPO (PCT)
Prior art keywords
ball
cavity
tip
ink
ink supply
Prior art date
Application number
PCT/IB1997/000228
Other languages
French (fr)
Inventor
Sergio Santini
Original Assignee
Premec S.A.
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 Premec S.A. filed Critical Premec S.A.
Priority to JP10511414A priority Critical patent/JP2000516870A/en
Priority to AU18080/97A priority patent/AU1808097A/en
Priority to HK99105887.7A priority patent/HK1020922B/en
Priority to DE69703888T priority patent/DE69703888T2/en
Priority to EP97903556A priority patent/EP0923456B1/en
Publication of WO1998008693A1 publication Critical patent/WO1998008693A1/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
    • B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds
    • B43K1/084—Ball beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/08—Nibs; Writing-points with ball points; Balls or ball beds

Definitions

  • the present invention relates to a ball point for a ballpoint pen in common use, comprising a ball point holding a ball in rotation and a sleeve containing a certain amount of ink.
  • the ball point has a ball retaining cavity in which the ball is free to rotate.
  • the bottom of this cavity communicates with an axial ink supply passage, this ink passage also communicating with the sleeve containing the ink reserve which is generally mounted on the rear of the ball point.
  • the cavity of the ball-point tip generally comprises a bearing surface of the ball having the shape of a sphere ring.
  • Grooves, or spider legs, are generally machined in the cylindrical wall of the ink supply passage and in the bearing surface of the ball to allow a uniform distribution of the ink on the surface of the ball. These grooves are difficult to machine and require recovery operations so that their centering is not always ensured.
  • Certain other embodiments propose making a bearing surface for the ball having inclined plane facets for better distribution of the ink.
  • the ball uses this bearing surface which becomes an annular portion of the sphere and there are then the same drawbacks of too little ink distribution.
  • the present invention relates to a ball point for ball point pen easy to machine, inexpensive, perfect and durable operation and this especially for ball point whose ball has a diameter at pus equal to 0 , 5 mm, which allows fine writing.
  • FIG. 1 illustrates schematically and by way of example three embodiments of the ball point for a ballpoint pen according to the present invention.
  • Figure 1 illustrates in axial section, the ball being in the service position, the ball point according to the first embodiment.
  • Figure 2 is a section identical to Figure 1, the ball not being shown.
  • Figure 3 is a plan view in the direction of arrow A in Figure 2 of the ball point.
  • Figures 4 to 6 are views similar to Figures 1 to 3 of a second embodiment of the invention.
  • Figures 7 to 9 are views similar to Figures 1 to 3 of a third embodiment of the invention.
  • the first embodiment of the ball point for a ball point pen illustrated in FIGS. 1 to 3 comprises a body 1 provided with a cavity 2 intended to receive and hold a ball 3 emerging from the front face of the body 1 of the tip.
  • This cavity 2 comprises a bearing surface of the ball or seat 4 formed of spherical zones, the radius of curvature of which corresponds to that of the ball 3 and which here is less than 0.5 mm, the ball point being intended a ballpoint pen for fine writing.
  • the rear part of the body 1 of the tip is provided with a housing 5 intended to communicate with an ink tank, not illustrated, fixed axially on the rear of the tip 1.
  • this central ink supply channel 6 has the shape of a straight prism whose axis of symmetry is coincident with that of the tip 1 and whose cross section is as it has zones directly connecting the housing 5 to the portion of the cavity 2 located outside of the bearing surface 4 of the ball 3.
  • this particular shape of the ink supply passage 6 results in the fact that the seat 4 of the ball is divided into several zones 4, separated from each other, each being a portion of a sphere whose center is located on the axis of symmetry of the tip 1 and whose radius of curvature corresponds to that of the ball, ie less than or at most equal to 0.5 mm.
  • the central ink supply passage 6 is of triangular cross section so that the bearing surface 4 of the ball 3 is divided into three zones, having, in plan view, sector of circles, concentric to the longitudinal axis of said channel 6.
  • the surface of the ball 3 which is brought into contact with the ink is greatly increased, indeed this surface is here formed on the one hand from that formed by the intersection of the ball 3 and of the channel 6 and increased on the other hand from the outside surface of the edge of the ball between the outside diameter, of the seat 4 and practically its equatorial diameter is the portion of the outer surface of the ball 3 formed by the revolution around the axis of the tip of a sector, the circle having the radius of the ball 3 and the angle at the center ⁇ .
  • the cavity 2 for holding the ball is allowed to fill with ink, which constitutes a sort of additional inking chamber situated beyond the seat 4 of the ball in the direction of the part. frontal of the tip 1.
  • This innovation making it possible to increase the portion of the surface of the ball 3 in contact with the ink supply, here the inked surface of the ball 3 is almost equal to half of its surface, is very important especially in the tips.
  • this innovation simultaneously makes it possible to greatly reduce the complexity of the shapes and therefore of the machining operations necessary for the manufacture of the ball point and this is all the more important and appreciable the smaller the dimensions of the point.
  • this channel 6 has a section of generally triangular shape, but the points of which have been rounded, which increases the passage section between the housing 5 and the cavity 2 and the sides of the triangle having curved middle portions, this which decreases the width of the portions 4 of the spherical bearing zone of the ball 3.
  • the section of the ink supply channel 6 is in the form of a star with six branches, thus dividing the spherical bearing zone of the ball into six independent portions 4.
  • This ink supply channel 6 can have multiple different shapes, its cross section can be elliptical, cruciform, square, polygonal or curvilinear.
  • the important characteristic of the tip is that this central channel 6 is constituted by a straight prism and that this intersects the spherical support zone of the ball 3, so as to create several support portions 4 all having the form d 'A portion of a sphere with a radius of curvature equal to that of the ball 3 and whose center is located on the axis of the tip 1 coinciding with the axis of the central passage 6.
  • the ink supply passage 6 separates the bearing surface of the ball 3 into several carriers. tions 4 separate and directly connects the cavity 2 for holding the ball to the ink supply housing 5.

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Abstract

The invention concerns a ball-bearing tip for a ball-point pen comprising a body (1) provided with a cavity (2) for maintaining the ball (3) protruding from the front surface of the tip and rotating freely in this cavity (2) and an axial passage (6) for feeding ink supplied by an ink reservoir. The diameter of the ball (3) is not greater than 0.5mm and its seat at the bottom of the cavity (2) consists of several portions (4) separated by a spherical zone each portion being separated from the others by a central duct for supplying ink (6). This central duct (6) has the shape of a prism with its axis merging with that of the tip (1), and partially opening into the cavity (2) for delivering ink directly thereby increasing the inked surface of the ball (3).

Description

POINTE PORTE-BILLE POUR STYLO A BILLE BALLPOINT TIP FOR BALLPOINT PEN
La présente invention a pour objet une pointe porte- bille pour stylo à bille d'usage courant, comprenant une pointe porte-bille retenant une bille en rotation et un manchon contenant une certaine quantité d'encre.The present invention relates to a ball point for a ballpoint pen in common use, comprising a ball point holding a ball in rotation and a sleeve containing a certain amount of ink.
La pointe porte-bille comporte une cavité de retenue de la bille dans laquelle la bille est libre en rotation. Le fond de cette cavité communique avec un passage axial d'amenée d'encre, ce passage d'encre communiquant par ailleurs avec le manchon contenant la réserve d'encre qui est généralement monté sur l'arrière de la pointe porte-bille.The ball point has a ball retaining cavity in which the ball is free to rotate. The bottom of this cavity communicates with an axial ink supply passage, this ink passage also communicating with the sleeve containing the ink reserve which is generally mounted on the rear of the ball point.
Autour du canal d'amenée d'encre la cavité de la pointe porte-bille comporte généralement une surface d'appui de la bille présentant la forme d'un anneau de sphère. Des rainures, ou pattes d'araignée, sont généralement usinées dans la paroi cylindrique du passage d'amenée d'encre et dans la surface d'appui de la bille pour permettre une distribution homogène de l'encre sur la surface de la bille. Ces rainures sont difficiles à usiner et nécessitent des opérations de reprise de sorte que leur centrage n'est pas toujours assuré.Around the ink supply channel, the cavity of the ball-point tip generally comprises a bearing surface of the ball having the shape of a sphere ring. Grooves, or spider legs, are generally machined in the cylindrical wall of the ink supply passage and in the bearing surface of the ball to allow a uniform distribution of the ink on the surface of the ball. These grooves are difficult to machine and require recovery operations so that their centering is not always ensured.
On a également proposé de ménager sous la bille, entre sa surface libre et le canal d'amenée d'encre une chambre d'accumulation d'encre. Dans de telles exécutions, l'encre n'est en contact qu'avec la surface de la bille située au centre de la surface d'appui annulaire de cette bille, ce qui pour des billes de faible diamètre n'est pas suffisant pour distribuer une quantité d'encre suffisante pour assurer une écriture homogène. De plus, ces pattes d'araignée s'encrassent rapidement par des déchets de papier, ce qui nuit au bon fonctionnement du stylo.It has also been proposed to provide under the ball, between its free surface and the ink supply channel, an ink accumulation chamber. In such embodiments, the ink is only in contact with the surface of the ball located at the center of the annular bearing surface of this ball, which for small diameter balls is not sufficient to distribute enough ink to ensure consistent writing. In addition, these spider legs quickly clog up with waste paper, which affects the functionality of the pen.
Certaines autres réalisations proposent de réaliser une surface d'appui de la bille présentant des facettes planes inclinées pour une meilleure distribution de l'encre. Dans ces exécutions, au bout d'un certain temps d'utilisation, la bille use cette surface d'appui qui devient une portion annulaire de sphère et on retrouve alors les mêmes inconvénients d'une trop faible distribution d'encre.Certain other embodiments propose making a bearing surface for the ball having inclined plane facets for better distribution of the ink. In these embodiments, after a certain period of use, the ball uses this bearing surface which becomes an annular portion of the sphere and there are then the same drawbacks of too little ink distribution.
Lorsque le diamètre de la bille est égal ou inférieur à 0,5 mm les inconvénients et difficultés liées à l'usinage des pattes d'araignée, à la réalisation d'une chambre intermédiaire d'accumulation d'encre ou de création d'une surface d'appui de la bille munie de facettes deviennent majeures et les solutions indiquées plus haut conduisent à des prix de revient exorbitants ou à des pointes présentant un mauvais fonctionnement.When the diameter of the ball is equal to or less than 0.5 mm, the drawbacks and difficulties associated with the machining of the spider legs, the production of an intermediate chamber for the accumulation of ink or the creation of a bearing surface of the ball provided with facets become major and the solutions indicated above lead to exorbitant cost prices or to points presenting a malfunction.
La présente invention a pour objet une pointe porte- bille pour stylo-bille facile à usiner, bon marché, d'un fonctionnement parfait et durable et ceci tout particulièrement pour des pointes porte-bille dont la bille présente un diamètre au pus égal à 0,5 mm, ce qui permet une écriture fine.The present invention relates to a ball point for ball point pen easy to machine, inexpensive, perfect and durable operation and this especially for ball point whose ball has a diameter at pus equal to 0 , 5 mm, which allows fine writing.
Ces buts sont obtenus par les caractéristiques énumé- rées dans la revendication 1.These objects are achieved by the features listed in claim 1.
Le dessin annexé illustre schématiquement et à titre d'exemple trois formes d'exécution de la pointe porte- bille pour stylo bille selon la présente invention. La figure 1 illustre en coupe axiale, la bille étant en position de service, la pointe porte-bille selon la première forme d'exécution.The accompanying drawing illustrates schematically and by way of example three embodiments of the ball point for a ballpoint pen according to the present invention. Figure 1 illustrates in axial section, the ball being in the service position, the ball point according to the first embodiment.
La figure 2 est une coupe identique à la figure 1 , la bille n'étant pas représentée.Figure 2 is a section identical to Figure 1, the ball not being shown.
La figure 3 est une vue en plan en direction de la flèche A de la figure 2 de la pointe porte-bille.Figure 3 is a plan view in the direction of arrow A in Figure 2 of the ball point.
Les figures 4 à 6 sont des vues analogues aux figures 1 à 3 d'une seconde forme d'exécution de l'invention.Figures 4 to 6 are views similar to Figures 1 to 3 of a second embodiment of the invention.
Les figures 7 à 9 sont des vues analogues aux figures 1 à 3 d'une troisième forme d'exécution de l'invention.Figures 7 to 9 are views similar to Figures 1 to 3 of a third embodiment of the invention.
La première forme d'exécution de la pointe porte-bille pour stylo-bille, illustrée aux figures 1 à 3 comporte un corps 1 muni d'une cavité 2 destinée à recevoir et maintenir une bille 3 émergeant hors de la face frontale du corps 1 de la pointe. Cette cavité 2 comporte une surface d'appui de la bille ou siège 4 formée de zones sphériques, dont le rayon de courbure correspond à celui de la bille 3 et qui ici est inférieur à 0,5 mm, la pointe porte-bille étant destinée à un stylo-bille permettant une écriture fine .The first embodiment of the ball point for a ball point pen, illustrated in FIGS. 1 to 3 comprises a body 1 provided with a cavity 2 intended to receive and hold a ball 3 emerging from the front face of the body 1 of the tip. This cavity 2 comprises a bearing surface of the ball or seat 4 formed of spherical zones, the radius of curvature of which corresponds to that of the ball 3 and which here is less than 0.5 mm, the ball point being intended a ballpoint pen for fine writing.
La partie frontale de la pointe 1 , dépassant le diamètre equatorial de la bille 3 en position de service, est sertie ou repoussée vers l'axe central ce qui permet de maintenir la bille 3 dans la cavité 2 où elle se meut en rotation librement.The front part of the tip 1, exceeding the equatorial diameter of the ball 3 in the service position, is crimped or pushed back towards the central axis, which makes it possible to maintain the ball 3 in the cavity 2 where it moves freely in rotation.
La partie arrière du corps 1 de la pointe est munie d'un logement 5 destiné à communiquer avec un réservoir d'encre, non illustré, fixé axialement sur l'arrière de la pointe 1. Un canal central d'amenée d'encre 6, axé sur l'axe de symétrie de la pointe 1 , relie la cavité 2 à ce logement distributeur d'encre 5.The rear part of the body 1 of the tip is provided with a housing 5 intended to communicate with an ink tank, not illustrated, fixed axially on the rear of the tip 1. A central ink supply channel 6, centered on the axis of symmetry of the tip 1, connects the cavity 2 to this ink distributor housing 5.
La particularité de ce canal central d'amenée d'encre 6 est qu'il présente la forme d'un prisme droit dont l'axe de symétrie est confondu avec celui de la pointe 1 et dont la section transversale est telle qu'elle présente des zones reliant directement le logement 5 à la portion de la cavité 2 située à l'extérieur de la surface d'appui 4 de la bille 3.The particularity of this central ink supply channel 6 is that it has the shape of a straight prism whose axis of symmetry is coincident with that of the tip 1 and whose cross section is as it has zones directly connecting the housing 5 to the portion of the cavity 2 located outside of the bearing surface 4 of the ball 3.
On voit ainsi que cette forme particulière du passage d'amenée d'encre 6 entraîne le fait que le siège 4 de la bille est fractionné en plusieurs zones 4, séparées les unes des autres, chacune étant une portion de sphère dont le centre est situé sur l'axe de symétrie de la pointe 1 et dont le rayon de courbure correspond à celui de la bille, soit inférieur ou au plus égal à 0,5 mm.It can thus be seen that this particular shape of the ink supply passage 6 results in the fact that the seat 4 of the ball is divided into several zones 4, separated from each other, each being a portion of a sphere whose center is located on the axis of symmetry of the tip 1 and whose radius of curvature corresponds to that of the ball, ie less than or at most equal to 0.5 mm.
Dans cette première forme d'exécution le passage central d'amenée d'encre 6 est de section droite triangulaire de sorte que la surface d'appui 4 de la bille 3 est divisée en trois zones, présentant, vue en plan, Ici forme de secteur de cercles, concentriques à l'axe longitudinal dudit canal 6.In this first embodiment, the central ink supply passage 6 is of triangular cross section so that the bearing surface 4 of the ball 3 is divided into three zones, having, in plan view, sector of circles, concentric to the longitudinal axis of said channel 6.
Dans cette exécution, ce sont les angles du prisme triangulaire formant le passage central d'amenée d'encre 6 qui relient directement à l'extérieur desdites zones d'appui 4 de la bille, le logement 5 relié au réservoir d'encre à la cavité 2 dans laquelle tourne la bille 3.In this embodiment, it is the angles of the triangular prism forming the central ink supply passage 6 which connect directly to the outside of said support zones 4 of the ball, the housing 5 connected to the ink tank at the cavity 2 in which the ball 3 rotates.
De cette façon on augmente très fortement la surface de la bille 3 qui est mise en contact avec l'encre, en effet cette surface est ici formée d'une part de celle formée par l'intersection de la bille 3 et du canal 6 et augmentée d'autre part de la surface extérieure de la tranche de la bille comprise entre le diamètre extérieur, du siège 4 et pratiquement son diamètre equatorial soit la portion de la surface extérieure de la bille 3 formée par la révolution autour de l'axe de la pointe d'un secteur le cercle ayant le rayon de la bille 3 et l'angle au centre α.In this way, the surface of the ball 3 which is brought into contact with the ink is greatly increased, indeed this surface is here formed on the one hand from that formed by the intersection of the ball 3 and of the channel 6 and increased on the other hand from the outside surface of the edge of the ball between the outside diameter, of the seat 4 and practically its equatorial diameter is the portion of the outer surface of the ball 3 formed by the revolution around the axis of the tip of a sector, the circle having the radius of the ball 3 and the angle at the center α.
On obtient ainsi un agrandissement spectaculaire, de l'ordre de 3 à 6 fois, de la surface de la bille 3 mise en contact avec l'encre par rapport aux pointes porte-bille conventionnelles, ce qui permet de garantir un bon fonctionnement du stylo-bille même pour des diamètres de bille inférieurs à 0,5 mm, tout en conservant une pointe porte- bille facile à fabriquer et à usiner. En outre, ces passages évitent tout encrassement par des déchets de papier.There is thus obtained a spectacular enlargement, of the order of 3 to 6 times, of the surface of the ball 3 brought into contact with the ink with respect to the conventional ball-point tips, which makes it possible to guarantee correct functioning of the pen - ball even for ball diameters less than 0.5 mm, while retaining a ball point easy to manufacture and machine. In addition, these passages prevent fouling by waste paper.
En fait, par cette construction, on permet à la cavité 2 de maintien de la bille de se remplir d'encre ce qui constitue une sorte de chambre d'encrage supplémentaire située au-delà du siège 4 de la bille en direction de la partie frontale de la pointe 1.In fact, by this construction, the cavity 2 for holding the ball is allowed to fill with ink, which constitutes a sort of additional inking chamber situated beyond the seat 4 of the ball in the direction of the part. frontal of the tip 1.
Cette innovation permettant d'augmenter la portion de la surface de la bille 3 en contact avec l'arrivée d'encre, ici la surface encrée de la bille 3 est presque égale à la moitié de sa superficie, est très importante spécialement dans les pointes porte-bille ayant des billes de petit diamètre, inférieur ou égal à 0,5 mm, car la distribution d'encre conventionnelle pour ces petites billes est insuffisante et ne donne pas de bons résultats. De plus, cette innovation permet simultanément de réduire grandement la complexité des formes et donc des usinages nécessaires pour la fabrication de la pointe porte- bille et ceci est d'autant plus important et appréciable que les dimensions de la pointe sont petites.This innovation making it possible to increase the portion of the surface of the ball 3 in contact with the ink supply, here the inked surface of the ball 3 is almost equal to half of its surface, is very important especially in the tips. ball holder having balls of small diameter, less than or equal to 0.5 mm, since the conventional ink distribution for these small balls is insufficient and does not give good results. In addition, this innovation simultaneously makes it possible to greatly reduce the complexity of the shapes and therefore of the machining operations necessary for the manufacture of the ball point and this is all the more important and appreciable the smaller the dimensions of the point.
Dans la seconde forme d'exécution illustrée aux figures 4 à 6, seule la forme du canal central 6 d'amenée d'encre est modifiée. Dans cette exécution, ce canal 6 présente une section de forme générale triangulaire, mais dont les pointes ont été arrondies, ce qui augmente la section de passage entre le logement 5 et la cavité 2 et les côtés du triangle présentant des portions médianes courbes, ce qui diminue la largeur des portions 4 de la zone d'appui sphérique de la bille 3.In the second embodiment illustrated in Figures 4 to 6, only the shape of the central ink supply channel 6 is changed. In this embodiment, this channel 6 has a section of generally triangular shape, but the points of which have been rounded, which increases the passage section between the housing 5 and the cavity 2 and the sides of the triangle having curved middle portions, this which decreases the width of the portions 4 of the spherical bearing zone of the ball 3.
Dans la forme d'exécution illustrée aux figures 7 à 9, la section du canal d'amenée d'encre 6 est en forme d'étoile à six branches divisant ainsi la zone d'appui sphérique de la bille en six portions 4 indépendantes.In the embodiment illustrated in FIGS. 7 to 9, the section of the ink supply channel 6 is in the form of a star with six branches, thus dividing the spherical bearing zone of the ball into six independent portions 4.
Ce canal d'amenée d'encre 6 peut présenter de multiples formes différentes, sa section droite peut être elliptique, cruciforme, carrée, polygonale ou curviligne. La caractéristique importante de la pointe est que ce canal central 6 soit constitué par un prisme droit et que celui-ci intersecte la zone sphérique d'appui de la bille 3, de manière à créer plusieurs portions d'appui 4 ayant toutes la forme d'une portion de sphère d'un rayon de courbure égal à celui de la bille 3 et dont le centre est situé sur l'axe de la pointe 1 coïncidant avec l'axe du passage 6 central. Ainsi, le passage d'amenée d'encre 6 sépare la surface d'appui de la bille 3 en plusieurs por- tions 4 distinctes et relie directement la cavité 2 de maintien de la bille au logement d'amenée d'encre 5. This ink supply channel 6 can have multiple different shapes, its cross section can be elliptical, cruciform, square, polygonal or curvilinear. The important characteristic of the tip is that this central channel 6 is constituted by a straight prism and that this intersects the spherical support zone of the ball 3, so as to create several support portions 4 all having the form d 'A portion of a sphere with a radius of curvature equal to that of the ball 3 and whose center is located on the axis of the tip 1 coinciding with the axis of the central passage 6. Thus, the ink supply passage 6 separates the bearing surface of the ball 3 into several carriers. tions 4 separate and directly connects the cavity 2 for holding the ball to the ink supply housing 5.

Claims

REVENDICATIONS
1. Pointe porte-bille pour stylo à bille comportant un corps (1) muni d'une cavité (2) de maintien d'une bille (3) émergeant de la face frontale de la pointe et tournant librement dans cette cavité (2) ainsi qu'un passage axial (6) d'amenée d'encre alimenté par un réservoir d'encre, caractérisée par le fait que le diamètre de la bille (3) est inférieur ou égal à 0,5 mm; par le fait que le siège de cette bille au fond de la cavité (2) est constitué par plusieurs portions (4) séparées d'une zone sphérique chaque portion étant séparée des autres par une partie d'un canal central d'amenée d'encre (6) présentant la forme d'un prisme droit dont l'axe est confondu avec celui de la pointe (1); et par le fait que ce canal (6) débouche partiellement dans la cavité (2) pour y délivrer directement de l'encre augmentant ainsi la surface encrée de la bille (3) .1. Ball point for ballpoint pen comprising a body (1) provided with a cavity (2) for holding a ball (3) emerging from the front face of the point and rotating freely in this cavity (2) as well as an axial ink supply passage (6) supplied by an ink reservoir, characterized in that the diameter of the ball (3) is less than or equal to 0.5 mm; by the fact that the seat of this ball at the bottom of the cavity (2) is constituted by several portions (4) separated by a spherical zone each portion being separated from the others by part of a central channel for supplying ink (6) having the shape of a straight prism whose axis coincides with that of the tip (1); and by the fact that this channel (6) partially opens into the cavity (2) in order to deliver ink there directly, thereby increasing the inked surface of the ball (3).
2. Pointe selon la revendication 1, caractérisée par le fait que le canal central d'amenée d'encre (6) présente une section droite de forme polygonale.2. Tip according to claim 1, characterized in that the central ink supply channel (6) has a cross section of polygonal shape.
3. Pointe selon la revendication 1, caractérisée par le fait que le canal central d'amenée d'encre (6) présente une section droite formée d'une succession de parties rec- tilignes et curvilignes.3. Tip according to claim 1, characterized in that the central ink supply channel (6) has a cross section formed by a succession of straight and curvilinear parts.
4. Pointe selon la revendication 1, caractérisée par le fait que le canal central d'amenée d'encre (6) présente une section droite curviligne.4. Tip according to claim 1, characterized in that the central ink supply channel (6) has a curvilinear straight section.
5. Pointe selon l'une des revendications précédentes, caractérisée par le fait que les portions d'appui (4) de la bille (3) sont des parties d'une zone annulaire sphérique dont le rayon de courbure correspond à celui de la bille (3) dont le centre est situé sur l'axe de la pointe (1) coaxial à l'axe du canal central (6) d'amenée d'encre.5. Tip according to one of the preceding claims, characterized in that the bearing portions (4) of the ball (3) are parts of a spherical annular zone whose radius of curvature corresponds to that of the ball (3) whose center is located on the axis of the tip (1) coaxial with the axis of the central channel (6) for supplying ink.
6. Pointe selon l'une des revendications précédentes, caractérisée par le fait que la cavité (2) de maintien de la bille (3) est reliée directement par plusieurs portions distinctes du canal central d'amenée d'encre au logement (5) débouchant sur la face arrière de la pointe communiquant avec un réservoir d'encre fixé à la pointe.6. Tip according to one of the preceding claims, characterized in that the cavity (2) for holding the ball (3) is directly connected by several distinct portions of the central ink supply channel to the housing (5) opening onto the rear face of the tip communicating with an ink tank fixed to the tip.
7. Pointe porte-bille pour stylo à bille comportant un corps (1) muni d'une cavité (2) de maintien de la bille (3) émergeant de la face frontale de la pointe et tournant librement dans cette cavité (2); un logement arrière (5) destiné à être relié à un réservoir d'encre et un passage d'amenée d'encre coaxial à la pointe débouchant dans ce logement (5); caractérisée par le fait que ce passage d'amenée d'encre relie directement le logement (5) à la cavité (2) en plusieurs endroits de celle-ci, et par le fait que la surface d'appui de la bille (3) sur le corps ( 1 ) est constituée par une pluralité de portions de surfaces d'une sphère dont le rayon de courbure est égal à celui de la bille (3) et le centre situé sur l'axe de la pointe (1) coaxial à l'axe du passage d'amenée d'encre. 7. Ball point for ballpoint pen comprising a body (1) provided with a cavity (2) for holding the ball (3) emerging from the front face of the point and rotating freely in this cavity (2); a rear housing (5) intended to be connected to an ink reservoir and a coaxial ink supply passage at the point opening into this housing (5); characterized by the fact that this ink supply passage directly connects the housing (5) to the cavity (2) in several places thereof, and by the fact that the bearing surface of the ball (3) on the body (1) is constituted by a plurality of portions of surfaces of a sphere whose radius of curvature is equal to that of the ball (3) and the center located on the axis of the tip (1) coaxial with the axis of the ink supply passage.
8. Pointe selon la revendication 7, caractérisée par le fait que le diamètre de la bille (3) est inférieur ou égal à 0,5 mm . 8. Tip according to claim 7, characterized in that the diameter of the ball (3) is less than or equal to 0.5 mm.
PCT/IB1997/000228 1996-08-27 1997-03-11 Ball-bearing tip for ball-point pen WO1998008693A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP10511414A JP2000516870A (en) 1996-08-27 1997-03-11 Ball bearing tips for ballpoint pens
AU18080/97A AU1808097A (en) 1996-08-27 1997-03-11 Ball-bearing tip for ball-point pen
HK99105887.7A HK1020922B (en) 1996-08-27 1997-03-11 Ball-bearing tip for ball-point pen
DE69703888T DE69703888T2 (en) 1996-08-27 1997-03-11 BALL TIP FOR BALLPOINT PEN
EP97903556A EP0923456B1 (en) 1996-08-27 1997-03-11 Ball-bearing tip for ball-point pen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH210596A CH691172A5 (en) 1996-08-27 1996-08-27 Pointe carrier ball ballpoint pen.
CH2105/96 1996-08-27

Publications (1)

Publication Number Publication Date
WO1998008693A1 true WO1998008693A1 (en) 1998-03-05

Family

ID=4225998

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/000228 WO1998008693A1 (en) 1996-08-27 1997-03-11 Ball-bearing tip for ball-point pen

Country Status (6)

Country Link
EP (1) EP0923456B1 (en)
JP (1) JP2000516870A (en)
AU (1) AU1808097A (en)
CH (1) CH691172A5 (en)
DE (1) DE69703888T2 (en)
WO (1) WO1998008693A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1150341A4 (en) * 1998-12-28 2005-06-08 Hitachi Chemical Co Ltd MATERIALS FOR METAL POLLING LIQUID, METAL POLISHING LIQUID, THEIR PRODUCTION AND POLISHING METHOD
EP2660071A4 (en) * 2010-12-27 2014-05-21 Pilot Corp TIP OF BALLPOINT PEN AND BALLPOINT PEN USING THE SAME

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6690893B2 (en) * 2015-03-06 2020-04-28 ゼブラ株式会社 Ballpoint pen tip and writing instrument equipped with the ballpoint pen tip

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1500199A (en) * 1966-04-26 1967-11-03 Ballpoint pen with pasty writing medium
FR2100149A5 (en) * 1970-07-10 1972-03-17 Linz Georg
US5104249A (en) * 1988-06-02 1992-04-14 J.S. Staedtler Gmbh & Co. Writing tip for a ball point pen
EP0679535A2 (en) * 1994-04-29 1995-11-02 The Pilot Ink Co., Ltd. Ballpoint pen tip, manufacturing method therefor, and ballpoint pen using the same
EP0726168A1 (en) * 1994-08-10 1996-08-14 Pentel Kabushiki Kaisha Tip of ball-point pen and method of manufacturing same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1500199A (en) * 1966-04-26 1967-11-03 Ballpoint pen with pasty writing medium
FR2100149A5 (en) * 1970-07-10 1972-03-17 Linz Georg
US5104249A (en) * 1988-06-02 1992-04-14 J.S. Staedtler Gmbh & Co. Writing tip for a ball point pen
EP0679535A2 (en) * 1994-04-29 1995-11-02 The Pilot Ink Co., Ltd. Ballpoint pen tip, manufacturing method therefor, and ballpoint pen using the same
EP0726168A1 (en) * 1994-08-10 1996-08-14 Pentel Kabushiki Kaisha Tip of ball-point pen and method of manufacturing same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1150341A4 (en) * 1998-12-28 2005-06-08 Hitachi Chemical Co Ltd MATERIALS FOR METAL POLLING LIQUID, METAL POLISHING LIQUID, THEIR PRODUCTION AND POLISHING METHOD
US7250369B1 (en) 1998-12-28 2007-07-31 Hitachi, Ltd. Materials for polishing liquid for metal, polishing liquid for metal, method for preparation thereof and polishing method using the same
US7799686B2 (en) 1998-12-28 2010-09-21 Hitachi, Ltd. Materials for polishing liquid for metal, polishing liquid for metal, method for preparation thereof and polishing method using the same
US8226849B2 (en) 1998-12-28 2012-07-24 Hitachi, Ltd. Materials for polishing liquid for metal, polishing liquid for metal, method for preparation thereof and polishing method using the same
EP2660071A4 (en) * 2010-12-27 2014-05-21 Pilot Corp TIP OF BALLPOINT PEN AND BALLPOINT PEN USING THE SAME
US9346313B2 (en) 2010-12-27 2016-05-24 Kabushiki Kaisha Pilot Corporation Ballpoint pen tip and ballpoint pen using the same

Also Published As

Publication number Publication date
AU1808097A (en) 1998-03-19
EP0923456A1 (en) 1999-06-23
CH691172A5 (en) 2001-05-15
DE69703888D1 (en) 2001-02-15
EP0923456B1 (en) 2001-01-10
JP2000516870A (en) 2000-12-19
DE69703888T2 (en) 2001-07-26
HK1020922A1 (en) 2000-05-26

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