EP0188716B1 - Pointe à bille pour stylographe et procédé de fabrication - Google Patents

Pointe à bille pour stylographe et procédé de fabrication Download PDF

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Publication number
EP0188716B1
EP0188716B1 EP85115430A EP85115430A EP0188716B1 EP 0188716 B1 EP0188716 B1 EP 0188716B1 EP 85115430 A EP85115430 A EP 85115430A EP 85115430 A EP85115430 A EP 85115430A EP 0188716 B1 EP0188716 B1 EP 0188716B1
Authority
EP
European Patent Office
Prior art keywords
ball
tube
longitudinal channels
pen tip
point pen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85115430A
Other languages
German (de)
English (en)
Other versions
EP0188716A1 (fr
Inventor
John P. Clading-Boel
Roland Schneider
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.)
Gebr Schneider GmbH
Original Assignee
Gebr Schneider GmbH
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 Gebr Schneider GmbH filed Critical Gebr Schneider GmbH
Publication of EP0188716A1 publication Critical patent/EP0188716A1/fr
Application granted granted Critical
Publication of EP0188716B1 publication Critical patent/EP0188716B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/10—Arrangements for feeding ink to the ball points
    • B43K7/105—Feed bars
    • 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 invention relates to a ballpoint pen tip with a metal tube receiving the writing ball in a seat at its front end, the ball seat being formed by inwardly directed deformations of the metal tube formed as longitudinal grooves as part of the ink-guiding device and the longitudinal grooves ending in front of the ball-side end of the metal tube.
  • Such a ballpoint pen tip is known from FR-A-1 088 078, US-A-32 83 390 and from CH-A-351 188.
  • the longitudinal grooves molded into the metal tube in these ballpoint pen tips each extend from the ball seat over part of the length of the metal tube.
  • the ink or ink paste must first be transported over a certain distance before the capillary action of the sections located between these longitudinal grooves inside the metal tubes can take effect.
  • only these longitudinal channels or the sections between them are provided for generating the capillarity, so that these previously known ballpoint pen tips are not suitable for liquid ink.
  • a ballpoint pen with such a ballpoint pen tip must point downwards when writing, i.e. writing on a vertical surface or even on the underside of an object is not possible since the capillarity of these metal tubes is not sufficient to convey the ink paste upwards.
  • a ballpoint pen tip is known from DE-A-30 00 214, in which inward deformations in the area of the ball between its free writing area and the ink supply serve as a ball seat. These deformations are designed in such a way that they themselves produce a certain capillarity in the area of the ball. In the longitudinal direction of the metal tube, however, the extent of these deformations is so small that they cannot serve as longitudinal channels. For the supply of the liquid writing ink in this case, therefore, a guide pin arranged in the longitudinal direction of the metal tube is used with a strongly jagged cross section, which also has some play with respect to the inside of the metal tube in order to produce the desired capillary effect. This guide pin is complex due to its jagged cross-sectional shape. Furthermore, this DE-A-30 00 214 discloses, as an ink guide device, a fiber bundle in which part of the ink supply remains in the fibers, ie is not used.
  • a ballpoint pen tip with a bored hole instead of a metal tube is known from FR-A-965140.
  • the bore is circular and smooth on the inside and has no inward-facing deformations, but only an out-of-round guide pin, which at the same time has to support the ball, i.e. it is loaded and supported in the longitudinal direction when writing.
  • the cross-sectional shape of this guide pin is flattened or jagged one or more times, so that this entire solution is to be regarded as very complex due to the elaboration of the ink channel from the full and due to this complicated cross-sectional shape of the ink guide pin.
  • the tube containing the ball preferably consists of plastic, so that after a very short time, wear on the tip must be expected.
  • This tube either has short inward deformations and / or a jagged or even longitudinally corrugated ink guide pin or there are grooves machined in the longitudinal direction to form the required capillaries. In any case, there is again a very complex shape of the ink guide pin or tube.
  • US-A-39 04 297 is known, which, although it discloses a guide pin which is substantially smooth in cross section or provided with a longitudinal groove, in which, however, the metal tube is either at all no deformation and. certainly has no longitudinal channel if the guide pin has the groove mentioned, or if the tube has soft grooves or the like incorporated into its internal cross section. which together with the guide pin form the desired capillaries.
  • a guide pin which is substantially smooth in cross section or provided with a longitudinal groove, in which, however, the metal tube is either at all no deformation and. certainly has no longitudinal channel if the guide pin has the groove mentioned, or if the tube has soft grooves or the like incorporated into its internal cross section. which together with the guide pin form the desired capillaries.
  • an ink guide pin with a jagged cross-section or a very complex metal tube with a contoured inner cross-section is required.
  • FR-A-646 651 also shows a ballpoint pen tip, in which grooves or the like are made in the inside of a bore machined from the full. Capillaries are incorporated and an ink guide pin is not provided at all.
  • the object is therefore to create a ballpoint pen tip of the type and of the type mentioned at the beginning, in which the advantages of a deformed tube compared to machining the ballpoint pen tip are retained, but the ink guide device is simplified and is so effective that it can also be used for liquid writing ink without the need for a guide pin that is jagged or profiled in cross section.
  • the solution to this problem is that the longitudinal channels run over the entire long side of the metal tube up to the ball and that in the interior of the metal tube as an ink guide device between the inwardly shaped longitudinal channels a smooth on the outside of the guide pin is provided, which with the sections of the Metal tubes between the longitudinal channels form capillaries.
  • the longitudinal channels due to their expansion over the entire long side of the metal tube, lead directly from the ink source to the ball and can interact with a guide pin of very simple cross-section.
  • the longitudinal channels have a double function by not only form all or part of the spherical seat with their outlet, but also contribute to the supply of the ink or ink paste due to the improvement of the capillary action within the tube.
  • the longitudinal channels end in front of the end of the tube on the spherical side and their transitions from the inside to the outside of the original tube circumference serve as a spherical seat or part of the spherical seat.
  • at least three longitudinal channels oriented parallel to its axis can be arranged on the circumference of the tube, preferably evenly distributed.
  • even more such longitudinal channels, e.g. four such longitudinal channels can be provided.
  • the integrally formed longitudinal channels inside the tube itself can serve as an ink conductor. This is particularly useful for pasty ink.
  • An embodiment of the ballpoint pen tip according to the invention for pasty ink with longitudinal channels as an ink-guiding device can consist in that the longitudinal channels in the interior of the tube are sharp-edged and thus have a high capillary shape, in particular at the transition of the tube cross-section to the cross-section of the respective longitudinal channel.
  • sufficient capillary action can be achieved in order to be able to write at least briefly on a vertical surface or even on an underside.
  • the guide pin can have a full cross section and preferably be circular in cross section. This makes this guide pin very easy and simple to manufacture.
  • the guide pin can be clamped between the channel-shaped deformations or longitudinal channels distributed around the circumference of the tube. There is then no need for any additional stops or brackets for this guide pin, which additionally forms highly capillary gaps with the somewhat inwardly curved or shaped longitudinal channels in the immediate vicinity of the contact points.
  • the smooth guide pin can rest with its face against the ball of the ballpoint pen tip and form an abutment for it in the axial direction.
  • This guide pin especially if it is clamped in the manner already mentioned by the longitudinal channels, becomes an additional component of the ball seat.
  • the guide pin can consist of plastic and / or metal, preferably of a cylindrical wire section. This makes its manufacture and assembly very easy.
  • the longitudinal grooves of the tube can extend from the end remote from the ball to the front side of the tube and end with it, and are preferably in contact with an ink wick and / or an ink cartridge. This ensures that the ink is captured by the ink-guiding device directly at the entry into the tube away from the ball, be it the longitudinal channels alone or the longitudinal channels in connection with a guide pin, and is transported to the ball by the capillary action.
  • a modified embodiment of the ballpoint pen tip can consist in that between the ball seat and the ball-side end of the guide pin an inward projection on the tube, in particular an annular bead, is formed or compressed, which forms a distance with a capillary effect between the ball and the guide pin .
  • the end of the tube remote from the ball can have an extension for direct connection to an ink space, preferably with writing paste, or to a wick system for aqueous ink.
  • a ballpoint pen tip with a metal tube with deformations in which these deformations are not used exclusively to form the ball seat and, if necessary, to produce a capillarity effective in the area of the ball, but also for the supply line the ink contribute to the ball seat.
  • a guide pin is used, a guide pin with a very simple cross-section is advantageously possible, which is a considerable advantage over the small dimensions of such a metal tube compared to a jagged guide pin with a complicated cross-section.
  • the invention also relates to a method for producing a ballpoint pen tip of the type described above.
  • This method is primarily characterized in that a tube which is initially circular in cross section is simultaneously hammered and / or pressed on its outside by shapes provided with rib-like longitudinal projections.
  • a pin-shaped body When molding the longitudinal channels or the like. a pin-shaped body can be inserted or inserted into the interior of the tube to limit the indentations.
  • a pin with a circular cross section can engage in the tube, which is pulled out after the longitudinal channels have been formed. This has the advantage that the necessary space is reserved from the outset for a guide pin of the cross section, which corresponds to the abutment pin when deforming.
  • the spherical seat can also be formed simultaneously or subsequently by an axial movement of this pin deeper into the tube by means of a preferably conical cross-sectional enlargement of this pin located in the end region of the tube.
  • the guide pin is already on before the longitudinal grooves are formed set and underpinned by a retaining pin at the end remote from the ball and held in the correct position and preferably a conical stamp on the end face for expanding the ball seat is pressed into the ball end face of the tube during or after the shaping of the longitudinal grooves.
  • the guide pin is clamped between them as soon as the longitudinal channels are formed and no longer has to be installed subsequently.
  • the ballpoint pen tip 1 has a metal tube 2, which receives the writing ball 4 in a ball seat 5 at the front end 3.
  • a metal tube 2 Arranged in the interior of the metal tube 2 is an ink-guiding device which is configured differently in the exemplary embodiments and extends over its entire length.
  • the ball seat can also be designed differently in the various embodiments in a manner to be described, but is in each case wholly or partly formed by inward deformations of the tube 2.
  • these deformations on the tube 2 are longitudinal grooves 6 extending over its entire longitudinal side up to the ball 4, which at the same time form the ink-guiding device or a part thereof in the tube 2.
  • the longitudinal channels 6 end in front of the ball-side end 3 of the tube 2 and their transitions 7 from the inside to the outside to the original tube circumference serve as a ball seat 5 or part of this ball seat 5. They serve alone as a ball seat in the exemplary embodiments according to FIGS. 1, 5 and 7 to 9. In Fig. 2 and 6 they serve only as part of the ball seat, because a guide pin 8 to be described lies with its end face 9 on the ball 4 of the ballpoint pen tip 1 and forms an abutment for it in the axial direction, i.e. with it End face 9 belongs to the ball seat 5.
  • At least three longitudinal channels 6 oriented parallel to its axis can be arranged uniformly distributed on the circumference of the tube 2. 10, however, there may also be more, for example four longitudinal channels 6.
  • the integrally formed longitudinal channels 6 in the interior of the tube 2 themselves serve as an ink guide or ink guide device. They are sharp-edged in the interior of the tube 2, in particular at the transition 10 of the tube's external cross-section to the cross-section of the respective longitudinal channel 6, and are thus highly capillary-shaped. The capillarity is further promoted by the fact that in the case of FIG. 10 there are more such longitudinal channels 6, which are therefore narrower in terms of the overall cross section.
  • the aforementioned guide pin 8 is provided in the interior of the tube 2 as an ink-guiding device or part thereof between the inwardly shaped longitudinal grooves 6, which is advantageously smooth on its outside, i.e. without grooves, deformations and fissures and forms 6 capillaries with at least the radially innermost surface line or surface of the longitudinal channels. 2 and 3 that the intermediate space 11 on the one hand between two adjacent longitudinal grooves 6 and on the other hand this guide pin 8 is very narrow and in the area of contact of the longitudinal grooves 6 with the guide pin 8 has conical constrictions which result in a good capillary action.
  • This embodiment is therefore also suitable for liquid ink in which the supply to the ball must be made with even narrower capillaries than with pasty ink.
  • Fig. 6 can be seen an embodiment in which the guide pin 8 on its side facing the ball 4 and with this side in contact end face 9 has a recess 12 into which the ball 4 in Gebraüchswolf - engages.
  • enough capillary spaces 13 are nevertheless formed in order to lead the ink well to the ball 4.
  • the end face 9 of the guide pin 8 maintains a slight distance from the ball 4, which also has a capillary effect and contributes to the supply of the ink to the ball.
  • FIG. 5 An embodiment is indicated in Fig. 5, in which between the ball seat 5 and the ball-side end 9 of the guide pin 8, an inward projection on the tube 2, in this case an annular bead 14 is molded or compressed between the ball 4 and the guide pin 8 forms the mentioned distance with capillary action.
  • the guide pin 8 has a full cross section that is circular. Compared to a jagged guide pin provided with longitudinal grooves or undercuts, such a smooth guide pin with a simple full cross section can be manufactured much more easily and can also be introduced more easily into the very narrow and small tube.
  • the guide pin can consist of plastic or metal, for example a cylindrical wire section.
  • Fig. 7 shows an embodiment in which the longitudinal grooves 6 of the tube 2 at the end remote from the ball extend into the end face 15 of the tube 2 and end with it and e.g. be in contact with an ink wick 16 or an ink cartridge. This area can then be enclosed by an adapter 17.
  • the end of the tube 2 remote from the ball has an extension 18 for direct connection to an ink space 19 or an ink conductor 16, whereby writing paste or a wick system for aqueous ink can be provided.
  • FIGS. 11 to 16 The manufacturing method of the above-described exemplary embodiments of a ballpoint pen tip can be seen from FIGS. 11 to 16.
  • the procedure is such that a tube 2, initially circular in cross section, is simultaneously hammered and / or pressed on its outside by shapers 21 provided with rib-like longitudinal projections 20.
  • the end position according to FIGS. 12 and 13 is taken from the starting position according to FIG. 11 and the end position according to FIGS. 15 and 16 from the starting position according to FIG. 14.
  • the rib-like longitudinal projections 20 of the former 21 then form the longitudinal channels 6.
  • a pin-shaped body 22 is simultaneously inserted or inserted to limit the recesses, as can be seen in FIGS. 11 to 13 and in a modified form also in FIGS. 14 and 15. As a result, the space for the guide pin 8 or else the interior space between the longitudinal channels according to FIG. 10 is kept free.
  • a pin 22 with a circular cross section engages in the tube 2, which is pulled out after the longitudinal channels 6 have been formed.
  • the spherical seat 5 is also simultaneously or subsequently shaped deeper into the tube 2 by means of an axial movement of this pin 22 by means of a conical cross-sectional enlargement 23 located in the end region of the tube 2.
  • FIGS. 14 to 16 The method shown in FIGS. 14 to 16 is basically the same as that of FIGS. 11 to 13 from.
  • the guide pin 8 is already inserted into the tube and is gripped by a retaining pin 24 at the end remote from the ball.
  • a conical stamp 25 on the end face is provided for expanding the ball seat 5 during or after the shaping of the longitudinal grooves 6, which is pressed into the end face of the tube 2 on the ball side to form or finally form the ball seat 5.
  • the guide pin 8 is thus already brought to its point of use, and it also forms the inner abutment for the deformations.

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Claims (18)

1. Pointe à bille (1) pour stylographe présentant, à son extrémité antérieure (3), un petit tube métallique (2) qui reçoit la bille d'écriture (4) dans un siège (5), le siège (5) de la bille étant réalisé en tant que partie du dispositif d'amenée d'encre, par l'intermédiaire de déformations du petit tube métallique (2) dirigées vers l'intérieur et ménagées sous la forme de rigoles longitudinales (6), et ces rigoles longitudinales (6) s'achevant avant l'extrémité (3) du petit tube métallique (2) qui est située côté bille, caractérisée par le fait que les rigoles longitudinales (6) s'étendent sur tout le côté longitudinal du petit tube métallique (2), jusqu'à la bille (4); et par le fait qu'une broche d'amenée (8) à face externe lisse, prévue en tant que dispositif d'amenée d'encre à l'intérieur du petit tube métallique (2), entre les rigoles longitudinales (6) déformées vers l'intérieur, forme des capillaires avec les régions du petit tube métallique (2) intercalées entre les rigoles longitudinales (6).
2. Pointe à bille pour stylographe selon la revendication 1, caractérisée par le fait que les rigoles longitudinales (6) s'achèvent avant l'extrémité (3) du petit tube (2) située côté bille, et leurs transitions (7), de l'intérieur vers l'extérieur par rapport au pourtour initial du petit tube, servent de siège (5) de la bille ou de partie de ce siège (5) de la bille.
3. Pointe à bille pour stylographe selon la revendication 1 ou 2, caractérisée par le fait que, sur le pourtour du petit tube (2), au moins trois rigoles longitudinales (6) orientées parallèlement à son axe sont agencées, de préférence, avec répartition uniforme.
4. Pointe à bille pour stylographe selon l'une des revendications 1 à 3, caractérisée par le fait que les rigoles longitudinales façonnées (6) servent, par elles-mêmes, de guides à encre à l'intérieur du petit tube (2).
5. Pointe à bille pour stylographe selon l'une des revendications 1 à 4, caractérisée par le fait que, à l'intérieur du petit tube (2) et notamment à la transition (10) entre la section extérieure de ce petit tube et la section de la rigole longitudinale considérée (6), les rigoles longitudinales sont réalisées à arêtes vives et, par conséquent, avec un fort effet de capillarité.
6. Pointe à bille pour stylographe selon l'une des revendications 1 à 5, caractérisée par le fait que la broche lisse d'amenée (8) porte, par sa face extrême (9), contre la bille (4) de la pointe à bille (1 ) pour stylographe, et forme pour cette dernière une contre-butée dans le sens axial.
7. Pointe à bille pour stylographe selon l'une des revendications 1 à 6, caractérisée par le fait que la broche d'amenée (8) présente, à sa face extrême (9) tournée vers la bille (4) avec laquelle elle est en contact, un encaissement (12) dans lequel la bille (4) s'engage dans la position d'utilisation.
8. Pointe à bille pour stylographe selon l'une des revendications 1 à 7, caractérisée par le fait que la broche d'amenée (8) possède une section pleine et est, de préférence, de section circulaire.
9. Pointe à bille pour stylographe selon l'une des revendications 1 à 8, caractérisée par le fait que la broche d'amenée (8) consiste en une matière plastique et/ou en un métal, de préférence en un tronçon de fil cylindrique.
10. Pointe à bille pour stylographe selon l'une des revendications précédentes, caractérisée par le fait que les rigoles longitudinales (6) du petit tube (2) s'étendent, à l'extrémité éloignée de la bille, jusqu'à la face extrême (15) du petit tube (2) sur laquelle elles s'achèvent, et sont de préférence en contact avec une mèche encreuse (16) et/ou une cartouche à encre.
11. Pointe à bille pour stylographe selon l'une des revendications 1 à 10, caractérisée par le fait qu'une saillie dirigée vers l'intérieur sur le petit tube (2), en particulier un bourrelet annulaire (14) ménagé ou refoulé entre le siège (5) de la bille et l'extrémité (9) de la broche d'amenée (8) qui est située côté bille, forme un interstice à effet capillaire entre la bille (4) et la broche d'amenée (8).
12. Pointe à bille pour stylographe selon l'une des revendications 1 à 11, caractérisée par le fait que l'extrémité du petit tube (2) qui est éloignée de la bille présente un évasement (18) en vue du raccordement direct à un compartiment à encre (19) ou à un guide à encre (16), renfermant de préférence une pâte d'écriture, ou bien à un système à mèche pour de l'encre aqueuse.
13. Pointe à bille pour stylographe selon l'une des revendications précédentes, caractérisée par le fait que la broche d'amenée (8) est coincée entre les rigoles longitudinales (6) réparties sur le pourtour du petit tube.
14. Procédé de fabrication d'une pointe à bille pour stylographe selon l'une des revendications précédentes, caractérisé par le fait qu'un petit tube (2) initialement de section ronde est simultanément martelé et/ou repoussé, à sa face externe, par des matrices (21 ) pourvues de saillies longitudinales (20) en forme de nervures.
15. Procédé selon la revendication 14, caractérisé par le fait que, lors de la déformation rentrante des rigoles longitudinales (6), une pièce (22) en forme de tige est engagée ou introduite à l'intérieur du petit tube (2), afin de limiter les déformations rentrantes.
16. Procédé selon la revendication 14 ou 15, caractérisé par le fait que, au cours du façonnage des rigoles longitudinales (6), une tige (22) de section ronde pénètre dans le petit tube (2) et est extraite après le façonnage des rigoles longitudinales (6).
17. Procédé selon l'une des revendications 14 à 16, caractérisé par le fait que le siège (5) de la bille est formé simultanément ou consécutivement par la tige (22) qui pénètre dans le petit tube (2) lors de la déformation, au moyen d'un élargissement de section (23) de cette tige, de préférence tronconique et situé dans la région extrême du petit tube (2), par un mouvement axial de ladite tige (22) s'opérant plus profondément dans le petit tube (2).
18. Procédé selon l'une des revendications 14 à 17, caractérisé par le fait que, avant le façonnage des rigoles longitudinales (6), la broche d'amenée (8) est engagée et emprisonnée par-dessous, à l'extrémité éloignée de la bille, par une tige de retenue (24), et un poinçon (25) à face frontale tronconique est de préférence enfoncé dans la face extrême du petit tube (2) située côté bille, en vue de l'évasement du siège (5) de la bille pendant ou après le façonnage des rigoles longitudinales (6).
EP85115430A 1985-01-23 1985-12-05 Pointe à bille pour stylographe et procédé de fabrication Expired EP0188716B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3502088 1985-01-23
DE3502088A DE3502088C1 (de) 1985-01-23 1985-01-23 Kugelschreiberspitze

Publications (2)

Publication Number Publication Date
EP0188716A1 EP0188716A1 (fr) 1986-07-30
EP0188716B1 true EP0188716B1 (fr) 1988-12-28

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Application Number Title Priority Date Filing Date
EP85115430A Expired EP0188716B1 (fr) 1985-01-23 1985-12-05 Pointe à bille pour stylographe et procédé de fabrication

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DE (2) DE3502088C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2002863A6 (es) * 1985-10-17 1988-10-01 Teibow Co Ltd Estructura de punta de boligrafo
JP4101499B2 (ja) 2001-10-31 2008-06-18 パイロットインキ株式会社 ボールペン

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR965140A (fr) * 1950-09-04
US3904297A (en) * 1973-06-29 1975-09-09 Sailor Pen Co Ltd Socket for holding the writing ball of a ball-point pen

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Publication number Priority date Publication date Assignee Title
LU30320A1 (fr) * 1945-07-05
DE816965C (de) * 1949-10-21 1951-10-15 Montblanc Simplo Gmbh Schreibkugel-Fuellhalter
BE511872A (fr) * 1951-10-05
FR1088078A (fr) * 1953-11-25 1955-03-02 Embout de cartouche de stylographe à bille
CH351188A (fr) * 1959-06-10 1960-12-31 Doleo S A Procédé de fabrication de pointes à bille pour stylographes à bille
US3283390A (en) * 1963-01-04 1966-11-08 Cross Co A T Machine for making ball point writing instrument
JPS5412410Y2 (fr) * 1975-12-10 1979-05-31
JPS5541583A (en) * 1978-09-20 1980-03-24 Canon Inc Servo control system
GB2065565B (en) * 1979-12-21 1983-07-20 Pilot Ink Co Ltd Ball-point pen tip and ball-point pen provided with same
GB2073676B (en) * 1980-03-28 1983-10-05 Pentel Kk Socket for a ball point
CH646651A5 (en) * 1981-09-11 1984-12-14 Azypatent Ag Tip for ball-point pen using low-viscosity inks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR965140A (fr) * 1950-09-04
US3904297A (en) * 1973-06-29 1975-09-09 Sailor Pen Co Ltd Socket for holding the writing ball of a ball-point pen

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Publication number Publication date
EP0188716A1 (fr) 1986-07-30
DE3566981D1 (en) 1989-02-02
DE3502088C1 (de) 1989-04-27

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