EP0681924A1 - Writing implement with fluid, especially solvent based - Google Patents
Writing implement with fluid, especially solvent based Download PDFInfo
- Publication number
- EP0681924A1 EP0681924A1 EP95490019A EP95490019A EP0681924A1 EP 0681924 A1 EP0681924 A1 EP 0681924A1 EP 95490019 A EP95490019 A EP 95490019A EP 95490019 A EP95490019 A EP 95490019A EP 0681924 A1 EP0681924 A1 EP 0681924A1
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- European Patent Office
- Prior art keywords
- ink
- buffer tank
- surface tension
- reservoir
- tip
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- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K8/00—Pens with writing-points other than nibs or balls
- B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
- B43K8/04—Arrangements for feeding ink to writing-points
- B43K8/06—Wick feed from within reservoir to writing-points
Definitions
- the present invention relates to a writing article with liquid ink, that is to say in which the ink is in the free state, not being trapped in a fibrous reservoir.
- This article comprises a reservoir for liquid ink, a tip ensuring by capillary action the transfer of the ink from the reservoir to the writing head proper, said writing head possibly being the free end of the point. transfer and finally a buffer tank intended to absorb and restore the excess ink in the event of variation of the conditions of use of the article.
- the reservoir which contains the ink is not isolated from the ambient air, but from the air reaches it via the transfer point. Therefore, a variation in the conditions of use, in particular the increase in the pressure of the air contained in the tank due to the heating of the air results in an abnormal inflow of ink in the transfer point and may cause stains or drips when the item is uncapped.
- Different embodiments of the buffer tank have already been proposed. In document EP.380696, this is a molded part, comprising comb-shaped radial slots and longitudinal slots bringing the radial slots into communication with the hollowed-out central part in contact with the transfer point.
- this buffer tank is only defined as being a capillary storage element the capillarity of which is on average lower than the capillarity of the transfer point on average, at least at the junction orifice between the transfer tip and the liquid ink tank.
- this buffer tank is made of a porous material and / or fibrous.
- the buffer tank is in the form of at least one compact block adjusted loosely around the transfer point. It may especially be a porous hydrophobic material based on microspheres, obtained by thermofusion of microspheres of one or more thermoplastic materials, in particular microspheres of polypropylene or polyethylene.
- the problem which the applicant seeks to solve is to propose a writing article of the aforementioned type which can be used with inks intended for writing on non-absorbent supports, metallic or plastic, for example on dry erase boards.
- the ink which is used is a solvent-based ink or an aqueous ink comprising a large quantity of surfactants allowing the wettability of the support.
- the ink is an ink, having a surface tension between 21 and 25mN / m, intended to be used on supports non-absorbent, metallic or plastic, and in that the material constituting the buffer tank has a surface tension which is lower than that of the ink by a determined difference, said tension being sufficient for the tank to be able to absorb and restore the excess ink from the transfer tip, by capillary action, in the event of a variation in the pressure prevailing in the reservoir.
- the difference determined between the surface tensions of the material constituting the buffer tank and the ink is preferably less than or equal to 4mN / m.
- the buffer tank is made of a porous or fibrous material, in particular polypropylene or polyester, the surface tension of which has been lowered by deposition of an agent having a surface tension of less than 21 mN / m.
- a porous or fibrous material in particular polypropylene or polyester
- solvent inks or aqueous inks comprising a high dose of surfactant can be achieved from the buffer tanks as described in the prior documents but which have been subjected to a treatment intended to produce a deposit of surface of an agent modifying the initial surface tension of the buffer tank.
- This treatment may in particular consist in a fluorination treatment, for example with plasma.
- a fluorination treatment for example with plasma.
- this deposit may be the deposition of a polysiloxane.
- this deposit can be obtained by impregnating said fibers with a polysiloxane bath, padding and drying.
- the subject of the present invention is a writing article with liquid ink of the type according to which the ink, which is contained in a reservoir, is transferred from said reservoir to the writing head, by capillarity, in a transfer point. .
- the writing article also includes a buffer tank in which the excess ink, in the event of variations pressure in the tank, can migrate from the transfer point and then be restored when the conditions of use return to normal.
- the writing article 1 consists of a substantially cylindrical hollow body 2, the bottom 3 of which is closed, the front part 4 of which is terminated by a cone 5 comprising a central orifice 6, and the rear part 7 of which acts as a reservoir 8 for liquid ink 9.
- Said reservoir 8 is closed by an internal partition 10 which has a central orifice 11.
- Article 1 also consists of a cylindrical transfer tip 12, made of a material capable of ensuring the transfer of the ink by capillary action. It may especially be a felt obtained from acrylic fibers or compacted polyester fibers.
- This tip 12 is positioned along the longitudinal axis of symmetry of the body 2. Its rear end 12 a is pressed slightly into the central orifice 11 of the partition 10 so that the tightness of the reservoir 8 is ensured, but without crushing of this end 12 a so that there can be circulation of ink and air by the tip 12.
- a tubular shoulder 14 of the internal partition 10 surrounds the central orifice 11 through which the tip 12 passes.
- This tubular shoulder 14 makes it possible to obtain a perfect seal of the reservoir 8 without crushing the end 12 a of the tip 12.
- the front end 12 b of said point 12 is cut in a bevel, in a warhead or in another configuration it forms the writing head and is centered in the central orifice 6 of the conical part 5 of the body 2.
- This centering is preferably obtained by lugs 15 distributed over the periphery of the internal wall of the neck 16 extending the cone 5; said lugs 15 delimit free spaces around the front end 12 b of the tip so as to allow air circulation between the inside and the outside of the article 1.
- the article 1 finally consists of a buffer tank 13 which surrounds the transfer point 12 in the internal part of the body 2 which is between the tank 8 and the cone 5.
- the buffer tank 13 has the function of absorbing and restoring the excess ink reaching the transfer tip 12 in the event of variations in the conditions of use of the article 1.
- the ink 9 which is contained in the reservoir 8 and which is in contact with the rear end 12 a of the tip 12 is absorbed and migrates by capillary action in the tip 12 to its front end 12 b .
- the ink consumed by the writing head is gradually replaced by the ink coming from the reservoir 8.
- a pressure balance is established between the air contained in the reservoir 8 and the air prevailing in the rest of body 2.
- this excess ink would migrate to the writing head 12 b and cause an abnormal supply of the article 1, capable of forming spots or streaks on the writing medium. Thanks to the presence of the buffer tank 13, this excess ink does not reach the writing head 12b ; by capillarity, the excess ink diffuses into the buffer tank 13 in contact with the capillaries of the tip 12, until the pressure balance is restored. Then, when the article 1 is reused, the ink which is consumed by the writing head 12 b preferably comes from the buffer tank 13.
- the buffer tank 13 is in the form of a compact block adjusted without tightening around of the tip 12, in an open pore material, of high porosity. It can also be a fibrous material or a buffer tank consisting of a molded part, with radial slots in the form of combs and longitudinal slots bringing the radial slots into communication with the hollowed-out central part in contact with the transfer point, in accordance with document EP.380696.
- the aim of the present invention is to be able to use such an article 1 to write on non-absorbent supports of the dry-erase whiteboard type or on metallic or plastic supports. It is known that in this case the ink which is used must have sufficient wettability with respect to the support so that there is a satisfactory marking. Solvent-based inks or aqueous inks containing surfactants which modify their wettability with respect to such supports are then used.
- the surface tension of the inks used for such supports was within a range of 21 to 25mN / m.
- the writing article 1 which has been described above has hitherto been used only for aqueous inks, that is to say for writing on absorbent supports.
- the aim of the present invention is to modify said writing article 1 so as to allow its use on non-absorbent supports or metallic or plastic supports.
- the ink 9 is an ink which has a surface tension comprised between 21 and 25mN / m and on the other hand the buffer tank 13 has a surface tension which is lower than that of the ink.
- the difference between the surface tension of the material constituting the buffer tank 13 and the surface tension of the ink 9 is such that the buffer tank can absorb and restore the excess ink coming from the transfer tip 12, by capillarity, in the event of variations in the pressure prevailing in the tank.
- the determined gap between the surface tensions of the material making up the buffer tank and the ink is equal to or less than 4mN / m.
- this reservoir fills with ink even when the article is used under normal pressure and temperature.
- the buffer tank 13 fulfills its function, that is to say does not absorb the ink 9 coming from the tip 12 unless the variation in the pressure prevailing in the reservoir 8.
- This fluorination treatment has the effect of depositing a thin layer of fluorine on the surface of the polypropylene constituting the buffer reservoir, which lowers the surface tension of the latter until it is, for example, less than 21mN / m.
- the surface tension of the buffer tank 13 must be lower than that of the ink 9 contained in the tank 8. However, it must not be too low insofar as in this case the ink 9 could no longer migrate inside. of the buffer tank 13 even in the event of a pressure variation prevailing in the tank 8. The buffer tank 13 could then no longer fulfill the function assigned to it. According to the applicant, the difference between the surface tension of the buffer tank and that of the ink should not exceed 4mN / m.
- the buffer tank 13 can have a differentiated surface tension throughout its volume.
- this variation in surface tension can take the form of a buffer tank 13 composed of a modular assembly, in the longitudinal direction with respect to the transfer tip 12.
- the surface tension of the buffer tank is higher near the tank 8 than near the central outlet orifice of the transfer point so as to absorb the excess ink preferably appear on the side of the reservoir 8.
- the transfer tip 12 is in two parts connected to one another, by means of connection.
- the connection must allow the transfer rod to fulfill its function of diffusing the ink 9 from the reservoir 8 to the writing tip, despite the dissociation of the latter into two parts 12 ', 12''similarly nature or different nature.
- the first part 12 ' has its rear end 12' a which opens into the reservoir 8 and the second part 12 '' has its front end 12 '' b which forms a writing point and opens out of the body 2.
- the buffer tank 13 is in contact with the first part 12 '.
- the first part 12 ′ consists of a capillary rod.
- the second part is made up of a writing or marking point; whatever its nature: extruded tip, roller tip, feather, felt tip, acrylic or polyester fiber tip.
- connection of the front end 12'c of the first part 12 'and the rear end 12''c of the second part 12' ' is for example obtained by adding adhesive 17 (FIG. 2A) or by welding or by means of a sheath 18 (FIG. 2B) welded or not or via a connection piece 19 made of hydrophilic fiber or of a porous hydrophilic capillary material.
- the present invention is not limited to the preferred embodiment which has been described by way of non-exhaustive example.
- a buffer tank such as that which is disclosed in document EP.380696
- an adequate treatment in particular a plasma fluorination
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- Pens And Brushes (AREA)
- Recording Measured Values (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Description
La présente invention concerne un article d'écriture à encre liquide, c'est-à-dire dans lequel l'encre est à l'état libre, n'étant pas emprisonnée dans un réservoir fibreux. Cet article comporte un réservoir pour l'encre liquide, une pointe assurant par capillarité le transfert de l'encre depuis le réservoir jusqu'à la tête d'écriture proprement dite , ladite tête d'écriture pouvant être l'extrémité libre de la pointe transfert et enfin un réservoir tampon destiné à absorber et restituer l'excès d'encre en cas de variation des conditions d'utilisation de l'article.The present invention relates to a writing article with liquid ink, that is to say in which the ink is in the free state, not being trapped in a fibrous reservoir. This article comprises a reservoir for liquid ink, a tip ensuring by capillary action the transfer of the ink from the reservoir to the writing head proper, said writing head possibly being the free end of the point. transfer and finally a buffer tank intended to absorb and restore the excess ink in the event of variation of the conditions of use of the article.
Dans ce type d'article d'écriture, le réservoir qui contient l'encre n'est pas isolé de l'air ambiant, mais de l'air lui parvient par l'intermédiaire de la pointe transfert. De ce fait, une variation des conditions d'utilisation , notamment l'augmentation de la pression de l'air contenu dans le réservoir due à l'échauffement de l'air se traduit par un afflux anormal d'encre dans la pointe transfert et peut provoquer des tâches ou coulures quand l'article est décapuchonné. C'est le rôle imparti au réservoir tampon que d'absorber l'excès d'encre provenant du réservoir avant qu'il n'atteigne la tête d'écriture, c'est-à-dire l'extrémité avant de la pointe de transfert qui sert à l'écriture, puis , une fois les conditions normales rétablies, de restituer à la pointe transfert l'encre qu'il contient. Différents modes de réalisation du réservoir tampon ont déjà été proposés. Dans le document EP.380696, il s'agit d'une pièce moulée, comportant des fentes radiales en forme de peigne et des fentes longitudinales mettant en communication les fentes radiales et la partie centrale évidée en contact avec la pointe transfert.In this type of writing article, the reservoir which contains the ink is not isolated from the ambient air, but from the air reaches it via the transfer point. Therefore, a variation in the conditions of use, in particular the increase in the pressure of the air contained in the tank due to the heating of the air results in an abnormal inflow of ink in the transfer point and may cause stains or drips when the item is uncapped. It is the role of the buffer tank to absorb excess ink from the tank before it reaches the writing head, i.e. the front end of the tip. transfer which is used for writing, then, once normal conditions have been restored, to restore the ink it contains to the point of transfer. Different embodiments of the buffer tank have already been proposed. In document EP.380696, this is a molded part, comprising comb-shaped radial slots and longitudinal slots bringing the radial slots into communication with the hollowed-out central part in contact with the transfer point.
Dans le document CH.A.422575 il s'agit d'une masse spongieuse à cellules ouvertes, de préférence dans un matériau n'absorbant pas l'encre.In document CH.A.422575 it is a spongy mass with open cells, preferably in a material which does not absorb the ink.
Dans le document WO.92/20530, la structure de ce réservoir tampon n'est définie que comme étant un élément stockeur capillaire dont la capillarité est en moyenne plus faible que ne l'est en moyenne la capillarité de la pointe transfert, au moins au niveau de l'orifice de jonction entre la pointe transfert et le réservoir d'encre liquide.In document WO.92 / 20530, the structure of this buffer tank is only defined as being a capillary storage element the capillarity of which is on average lower than the capillarity of the transfer point on average, at least at the junction orifice between the transfer tip and the liquid ink tank.
Il est noté que ce réservoir tampon est conçu en un matériau poreux et/ou fibreux.It is noted that this buffer tank is made of a porous material and / or fibrous.
Dans le document EP.516538, le réservoir tampon est sous forme d'au moins un bloc compact ajusté sans serrage autour de la pointe transfert. Il peut notamment s'agir d'un matériau hydrophobe poreux à base de microsphères, obtenues par thermofusion de microsphères d'une ou de plusieurs matières thermoplastiques, notamment de microsphères en polypropylène ou polyéthylène.In document EP.516538, the buffer tank is in the form of at least one compact block adjusted loosely around the transfer point. It may especially be a porous hydrophobic material based on microspheres, obtained by thermofusion of microspheres of one or more thermoplastic materials, in particular microspheres of polypropylene or polyethylene.
A la connaissance du demandeur, les articles d'écriture avec encre liquide et réservoir tampon, comme décrits ci-dessus n'ont donné lieu à application que dans le domaine des encres aqueuses destinées à l'écriture sur support absorbant.To the knowledge of the applicant, writing articles with liquid ink and buffer tank, as described above, have given rise to application only in the field of aqueous inks intended for writing on absorbent support.
Le problème que cherche à résoudre le demandeur est de proposer un article d'écriture du type précité qui puisse être utilisé avec des encres destinées à l'écriture sur des supports non-absorbants, métalliques ou plastiques, par exemple sur des tableaux effaçables à sec. Dans ce cas l'encre qui est mise en oeuvre est une encre à base de solvant ou une encre aqueuse comprenant une quantité important d'agents tensioactifs permettant la mouillabilité du support.The problem which the applicant seeks to solve is to propose a writing article of the aforementioned type which can be used with inks intended for writing on non-absorbent supports, metallic or plastic, for example on dry erase boards. . In this case, the ink which is used is a solvent-based ink or an aqueous ink comprising a large quantity of surfactants allowing the wettability of the support.
Les essais réalisés par le demandeur avec de telles encres en mettant en oeuvre les réservoirs tampons décrits dans les documents antérieurs n'ont pas donné de résultats satisfaisants dans la mesure où l'encre diffuse à l'intérieur du réservoir tampon alors même que les conditions d'utilisation sont des conditions normales. En cas de variations des conditions d'utilisation, le réservoir tampon ne peut plus jouer son rôle et on observe les tâches ou coulures que l'on cherchait à éviter grâce audit réservoir tampon.The tests carried out by the applicant with such inks using the buffer tanks described in the previous documents have not given satisfactory results insofar as the ink diffuses inside the buffer tank even though the conditions of use are normal conditions. In case of variations in the conditions of use, the buffer tank can no longer play its role and we observe the tasks or streaks that we sought to avoid thanks to said buffer tank.
L'objet de l'invention est donc de proposer un article d'écriture à encre liquide et à réservoir tampon qui pallie l'inconvénient précité. Il s'agit d'un article d'écriture à encre liquide qui est composé :
- a) d'un corps dont la partie arrière constitue le réservoir pour l'encre,
- b) d'une pointe de transfert dont l'extrémité arrière débouche dans le réservoir et dont l'extrémité avant, formant pointe d'écriture, débouche hors dudit corps, et
- c) d'un réservoir tampon en contact avec la pointe de transfert.
- a) a body the rear part of which constitutes the reservoir for the ink,
- b) a transfer tip, the rear end of which opens into the reservoir and the front end of which forms a writing tip, opens out of said body, and
- c) a buffer tank in contact with the transfer tip.
De manière caractéristique l'encre est une encre, ayant une tension superficielle comprise entre 21 et 25mN/m, destinée à être utilisée sur des supports non-absorbants, métalliques ou plastiques, et en ce que le matériau constitutif du réservoir tampon a une tension superficielle qui est inférieure à celle de l'encre d'un écart déterminé, ladite tension étant suffisante pour que le réservoir puisse absorber et restituer l'excès d'encre provenant de la pointe de transfert, par capillarité, en cas de variation de la pression régnant dans le réservoir.Typically the ink is an ink, having a surface tension between 21 and 25mN / m, intended to be used on supports non-absorbent, metallic or plastic, and in that the material constituting the buffer tank has a surface tension which is lower than that of the ink by a determined difference, said tension being sufficient for the tank to be able to absorb and restore the excess ink from the transfer tip, by capillary action, in the event of a variation in the pressure prevailing in the reservoir.
C'est le mérite du demandeur que d'avoir analysé les conditions particulières de la capillarité au niveau du réservoir tampon et à déterminer l'importance de la tension superficielle du matériau constitutif de ce réservoir tampon au regard de celle de l'encre.It is the merit of the applicant to have analyzed the particular conditions of capillarity at the level of the buffer tank and to determine the importance of the surface tension of the material constituting this buffer tank with regard to that of the ink.
L'écart déterminé entre les tensions superficielles du matériau constitutif du réservoir tampon et de l'encre est de préférence inférieur ou égal à 4mN/m.The difference determined between the surface tensions of the material constituting the buffer tank and the ink is preferably less than or equal to 4mN / m.
De préférence le réservoir tampon est réalisé dans un matériau poreux ou fibreux, notamment en polypropylène ou en polyester, dont la tension de surface a été abaissée par dépôt d'un agent ayant une tension de surface inférieure à 21mN/m. Le même effet de diffusion par capillarité avec des encres solvants ou des encres aqueuses comportant une forte dose de tensioactif peut être atteint à partir des réservoirs tampons tels que décrits dans les documents antérieurs mais auxquels on a fait subir un traitement destiné à réaliser un dépôt de surface d'un agent modifiant la tension superficielle initiale du réservoir tampon.Preferably the buffer tank is made of a porous or fibrous material, in particular polypropylene or polyester, the surface tension of which has been lowered by deposition of an agent having a surface tension of less than 21 mN / m. The same capillary diffusion effect with solvent inks or aqueous inks comprising a high dose of surfactant can be achieved from the buffer tanks as described in the prior documents but which have been subjected to a treatment intended to produce a deposit of surface of an agent modifying the initial surface tension of the buffer tank.
Ce traitement peut notamment consister dans un traitement de fluoration, par exemple par plasma. Dans ce cas on obtient l'accrochage d'une couche superficielle de fluor modifiant la tension superficielle du réservoir tampon, ladite tension correspondant alors à celle du fluor.This treatment may in particular consist in a fluorination treatment, for example with plasma. In this case, there is obtained the attachment of a surface layer of fluorine modifying the surface tension of the buffer tank, said tension then corresponding to that of fluorine.
Selon une autre version, il peut s'agir du dépôt d'un polysiloxane. S'agissant d'un réservoir tampon à base de fibres, ce dépôt peut être obtenu par imprégnation desdites fibres par un bain de polysiloxane , foulardage et séchage.According to another version, it may be the deposition of a polysiloxane. As this is a fiber-based buffer tank, this deposit can be obtained by impregnating said fibers with a polysiloxane bath, padding and drying.
La présente invention sera mieux comprise à la lecture de la description qui va être faite d'un exemple de réalisation d'un article d'écriture à encre liquide pour surface non absorbante comportant un réservoir tampon en polypropylène poreux fluoré par plasma, illustré par le dessin annexé dans lequel :
- La figure 1 est une vue schématique en coupe longitudinale de l'article,
- Les figures 2A à 2C sont des vues schématiques partielles en coupe de la pointe transfert.
- FIG. 1 is a schematic view in longitudinal section of the article,
- Figures 2A to 2C are partial schematic sectional views of the transfer tip.
La présente invention a pour objet un article d'écriture à encre liquide du type selon lequel l'encre, qui est contenue dans un réservoir, est transférée dudit réservoir jusqu'à la tête d'écriture, par capillarité, dans une pointe de transfert. De manière connue, notamment par les documents antérieurs CH.422575, EP.380696, WO.92/20531,EP.516538, l'article d'écriture comporte également un réservoir tampon dans lequel l'encre en excès, en cas de variations de pression dans le réservoir, peut migrer depuis la pointe de transfert puis être restituée lorsque les conditions d'utilisation redeviennent normales.The subject of the present invention is a writing article with liquid ink of the type according to which the ink, which is contained in a reservoir, is transferred from said reservoir to the writing head, by capillarity, in a transfer point. . In a known manner, in particular by the prior documents CH.422575, EP.380696, WO.92 / 20531, EP.516538, the writing article also includes a buffer tank in which the excess ink, in the event of variations pressure in the tank, can migrate from the transfer point and then be restored when the conditions of use return to normal.
Un mode préféré d'articles d'écriture de ce type est notamment décrit dans le document antérieur EP.516538 et illustré par la figure 1 annexée.A preferred mode of writing articles of this type is described in particular in the prior document EP.516538 and illustrated by FIG. 1 attached.
L'article d'écriture 1 est constitué d'un corps creux 2 sensiblement cylindrique dont le fond 3 est obturé, dont la partie antérieure 4 est terminée par un cône 5 comportant un orifice central 6, et dont la partie postérieure 7 fait office de réservoir 8 pour l'encre liquide 9. Ledit réservoir 8 est fermé par une cloison intérieure 10 qui comporte un orifice central 11.The writing article 1 consists of a substantially cylindrical
L'article 1 est constitué également d'une pointe de transfert 12 cylindrique, réalisée dans un matériau apte à assurer le transfert de l'encre par capillarité . Il peut s'agir notamment d'un feutre obtenu à partir de fibres acryliques ou de fibres de polyester compactées. Cette pointe 12 est positionnée selon l'axe longitudinal de symétrie du corps 2. Son extrémité arrière 12a est emmanchée légèrement à force dans l'orifice central 11 de la cloison 10 de sorte que l'étanchéité du réservoir 8 soit assurée, mais sans écrasement de cette extrémité 12a de sorte qu'il puisse y avoir circulation de l'encre et de l'air par la pointe 12.Article 1 also consists of a
De préférence, comme illustré sur la figure 1 , un épaulement tubulaire 14 de la cloison intérieure 10 entoure l'orifice central 11 par lequel passe la pointe 12. Cet épaulement tubulaire 14 permet d'obtenir une parfaite étanchéité du réservoir 8 sans écrasement de l'extrémité 12a de la pointe 12.Preferably, as illustrated in FIG. 1, a
L'extrémité avant 12b de ladite pointe 12 est taillée en biseau, en ogive ou selon une autre configuration elle forme la tête d'écriture et est centrée dans l'orifice central 6 de la partie conique 5 du corps 2. Ce centrage est de préférence obtenu par des ergots 15 répartis sur la périphérie de la paroi interne du col 16 prolongeant le cône 5; lesdits ergots 15 délimitent des espaces libres autour de l'extrémité avant 12b de la pointe de manière à permettre une circulation d'air entre l'intérieur et l'extérieur de l'article 1.The
L'article 1 est constitué enfin d'un réservoir tampon 13 qui entoure la pointe transfert 12 dans la partie intérieure du corps 2 qui est comprise entre le réservoir 8 et le cône 5.The article 1 finally consists of a
Le réservoir tampon 13 a pour fonction d'absorber et de restituer l'excès d'encre parvenant à la pointe de transfert 12 en cas de variations des conditions d'utilisation de l'article 1.The
En fonctionnement normal, l'encre 9 qui est contenue dans le réservoir 8 et qui est en contact avec l'extrémité arrière 12a de la pointe 12 est absorbée et migre par capillarité dans la pointe 12 jusqu'à son extrémité avant 12b. L'encre consommée par la tête d'écriture est remplacée au fur et à mesure par l'encre provenant du réservoir 8. Il s'établit un équilibre de pression entre l'air contenu dans le réservoir 8 et l'air régnant dans le reste du corps 2.In normal operation, the
En cas de fonctionnement anormal, dû notamment à une augmentation de pression dans le réservoir 8, par exemple lors d'un échauffement de l'article 1, un excès d'encre 9 afflue depuis le réservoir 8 dans la pointe 12.In the event of abnormal operation, due in particular to an increase in pressure in the reservoir 8, for example during heating of the article 1, an excess of
En absence de réservoir tampon 13, cet excès d'encre migrerait jusqu'à la tête d'écriture 12b et provoquerait une alimentation anormale de l'article 1, susceptible de former des tâches ou des coulures sur le support d'écriture . Grâce à la présence du réservoir tampon 13, cet excès d'encre ne parvient pas à la tête d'écriture 12b ; par capillarité, l'excès d'encre diffuse dans le réservoir tampon 13 en contact avec les capillaires de la pointe 12, jusqu'à ce que l'équilibre de pression se rétablisse. Ensuite,lors de la ré-utilisation de l'article 1, l'encre qui est consommée par la tête d'écriture 12b provient préférentiellement du réservoir tampon 13.In the absence of a
Selon l'exemple de réalisation, conforme au document EP.516538, le réservoir tampon 13 est sous forme d'un bloc compact ajusté sans serrage autour de la pointe 12, dans un matériau à pores ouverts, de grande porosité. Il peut également s'agir d'un matériau fibreux ou encore d'un réservoir tampon consistant en une pièce moulée , avec des fentes radiales en forme de peignes et des fentes longitudinales mettant en communication les fentes radiales et la partie centrale évidée en contact avec la pointe transfert, conforme au document EP.380696.According to the exemplary embodiment, in accordance with document EP.516538, the
Le but visé par la présente invention est de pouvoir utiliser un tel article 1 pour écrire sur des supports non-absorbants du type tableau blanc effaçable à sec ou sur des supports métalliques ou plastiques. On sait que dans ce cas l'encre qui est mise en oeuvre doit avoir une mouillabilité suffisante vis-à-vis du support pour qu'il y ait un marquage satisfaisant. On utilise alors des encres à base de solvant ou encore des encres aqueuses comportant des tensioactifs modifiant leur mouillabilité vis-à-vis de tels supports.The aim of the present invention is to be able to use such an article 1 to write on non-absorbent supports of the dry-erase whiteboard type or on metallic or plastic supports. It is known that in this case the ink which is used must have sufficient wettability with respect to the support so that there is a satisfactory marking. Solvent-based inks or aqueous inks containing surfactants which modify their wettability with respect to such supports are then used.
Le demandeur a constaté que de manière générale la tension superficielle des encres utilisées pour de tels supports était comprise dans une fourchette de 21 à 25mN/m.The Applicant has found that, in general, the surface tension of the inks used for such supports was within a range of 21 to 25mN / m.
L'article d'écriture 1 qui a été décrit ci-dessus n'a jusqu'à présent été utilisé que pour des encres aqueuses, c'est-à-dire pour écrire sur des supports absorbants. Le but visé par la présente invention est de modifier ledit article d'écriture 1 de manière à permettre son utilisation sur des supports non-absorbants ou des supports métalliques ou plastiques.The writing article 1 which has been described above has hitherto been used only for aqueous inks, that is to say for writing on absorbent supports. The aim of the present invention is to modify said writing article 1 so as to allow its use on non-absorbent supports or metallic or plastic supports.
De manière caractéristique, d'une part l'encre 9 est une encre qui a une tension de surface comprise enter 21 et 25mN/m et d'autre part le réservoir tampon 13 a une tension de surface qui est inférieure à celle de l'encre. L'écart entre la tension superficielle du matériau constitutif du réservoir tampon 13 et la tension superficielle de l'encre 9 est tel que le réservoir tampon puisse absorber et restituer l'excès d'encre provenant de la pointe de transfert 12, par capillarité , en cas de variations de la pression régnant dans le réservoir.Typically, on the one hand the
En effet les travaux du demandeur l'ont conduit à analyser et à vérifier l'importance des rapports existant entre les tensions de surface des différents composants entrant dans la circulation de l'encre, après avoir constaté qu'en mettant en oeuvre une encre du type solvant le réservoir tampon hydrophobe en polypropylène tel que décrit dans le document EP.516538 se remplissait d'encre dans des conditions normales de fonctionnement.Indeed, the work of the applicant led him to analyze and verify the importance of the relationships existing between the surface tensions of the various components entering into the circulation of the ink, after having noted that by using an ink of the solvent type the hydrophobic buffer tank in polypropylene as described in document EP.516538 filled with ink under normal operating conditions.
Pour obtenir un réservoir tampon qui soit polyvalent, c'est-à-dire qui puisse être utilisé pour tout type d'encre dont la tension de surface est comprise entre 21 et 25mN/m, il est préférable que l'écart déterminé entre les tensions superficielles du matériau constitutif du réservoir tampon et de l'encre soit égal ou inférieur à 4mN/m.To obtain a buffer tank that is versatile, that is to say that it can be used for any type of ink whose surface tension is between 21 and 25mN / m, it is preferable that the determined gap between the surface tensions of the material making up the buffer tank and the ink is equal to or less than 4mN / m.
Ceci peut être obtenu en mettant en oeuvre dans ledit réservoir un matériau ayant une telle tension de surface ou encore en modifiant le matériau constitutif du réservoir tampon pour abaisser la tension superficielle par dépôt d'un agent ayant une tension superficielle plus basse, par exemple inférieure à 21mN/m.This can be obtained by using a material having such a surface tension in said reservoir or by modifying the material constituting the buffer reservoir to lower the surface tension by depositing an agent having a lower, for example lower, surface tension. at 21mN / m.
Pour obtenir un tel résultat on peut traiter un réservoir tampon 13 déjà constitué, par exemple obtenu par thermofusion d'un mélange de microsphères ou microbilles de deux types de polypropylène de grades différents, c'est-à-dire de polypropylène ayant des températures de fusion différentes, comme décrit dans le document EP.516538, ou par thermocollage de microsphères d'un seul matériau thermoplastique. Comme cela a été indiqué précédemment, lorsqu'il est mis en oeuvre avec des encres du type solvant ou comportant des tensioactifs , ce réservoir se remplit d'encre même en cas d'utilisation de l'article dans des conditions normales de pression et de température.To obtain such a result, it is possible to treat a
Par contre si on soumet ledit réservoir tampon à un traitement de fluoration en milieu plasma, le réservoir tampon 13 remplit sa fonction c'est-à-dire n'absorbe l'encre 9 provenant de la pointe 12 qu'en cas de variation de la pression régnant dans le réservoir 8. Ce traitement de fluoration a pour effet de déposer une fine couche de fluor en surface du polypropylène constitutif du réservoir tampon, ce qui abaisse la tension superficielle de celui-ci jusqu'à la rendre par exemple inférieure à 21mN/m.On the other hand, if said buffer tank is subjected to a fluorination treatment in a plasma medium, the
Il est possible d'appliquer un tel traitement de fluoration par plasma sur tout type de matériaux adaptés pour constituer le réservoir tampon.It is possible to apply such a plasma fluorination treatment to any type of material suitable for constituting the buffer tank.
Il est également possible de traiter non plus le réservoir tampon déjà mis en forme mais les matériaux qui constitueront le réservoir tampon avant la mise en forme de celui-ci. En particulier , s'agissant d'un réservoir tampon fibreux, réalisé à partir de fibres de polyester ou de polypropylène, il est possible de déposer en surface desdites fibres une fine couche d'un polysiloxane ou encore d'une résine fluorée par imprégnation desdites fibres par un bain contenant l'un ou l'autre de ces ingrédients , foulardage et séchage.It is also possible to no longer treat the already shaped buffer tank but the materials which will constitute the buffer tank before putting in the shape of it. In particular, in the case of a fibrous buffer tank, produced from polyester or polypropylene fibers, it is possible to deposit on the surface of said fibers a thin layer of a polysiloxane or of a fluorinated resin by impregnating said fibers. fibers by a bath containing one or the other of these ingredients, padding and drying.
La tension superficielle du réservoir tampon 13 doit être inférieure à celle de l'encre 9 contenue dans le réservoir 8. Cependant elle ne doit pas être trop basse dans la mesure où dans ce cas l'encre 9 ne pourrait plus migrer à l'intérieur du réservoir tampon 13 même en cas de variation de pression régnant dans le réservoir 8. Le réservoir tampon 13 ne pourrait alors plus remplir la fonction qui lui est impartie. Selon le demandeur, la différence entre la tension superficielle du réservoir tampon et celle de l'encre ne doit pas excéder 4mN/m.The surface tension of the
Le réservoir tampon 13 peut présenter une tension superficielle différenciée dans l'ensemble de son volume. En particulier cette variation de tension superficielle peut se matérialiser par un réservoir tampon 13 composé d'un assemblage modulaire, dans le sens longitudinal par rapport à la pointe transfert 12. De préférence la tension superficielle du réservoir tampon est plus haute près du réservoir 8 que près de l'orifice central de sortie de la pointe transfert de manière à absorber l'excès d'encre apparaissent préférentiellement du côté du réservoir 8.The
A la figure 2 on a représenté des variantes de réalisation de la pointe transfert 12 pouvant être mises en oeuvre pour des raisons de facilité de fabrication et de montage. Selon toutes ces variantes, la pointe transfert 12 est en deux parties connectées l'une à l'autre, grâce à des moyens de connexion. La connexion doit permettre à la tige transfert de remplir sa fonction de diffusion de l'encre 9 depuis le réservoir 8 jusqu'à la pointe d'écriture, malgré la dissociation de celle-ci en deux parties 12',12'' de même nature ou de nature différente. La première partie 12' a son extrémité arrière 12'a qui débouche dans le réservoir 8 et la seconde partie 12'' a son extrémité avant 12''b qui forme pointe d'écriture et débouche hors du corps 2. Le réservoir tampon 13 est en contact avec la première partie 12'.In Figure 2 there are shown alternative embodiments of the
La première partie 12' est constituée d'un jonc capillaire. La seconde partie est constituée d'une pointe à écrire ou à marquer ; quelle que soit sa nature: pointe extrudée, pointe roller, plume, pointe feutre, pointe en fibre acrylique ou polyester.The
La connexion de l'extrémité avant 12'c de la première partie 12' et de l'extrémité arrière 12''c de la seconde partie 12'' est par exemple obtenue par apport de colle 17 (figure 2A) ou par soudage ou grâce à une gaine 18 (figure 2B) soudée ou non ou par l'intermédiaire d'une pièce de connexion 19 en fibre hydrophile ou dans un matériau poreux capillaire hydrophile.The connection of the front end 12'c of the first part 12 'and the rear end 12''c of the second part 12' 'is for example obtained by adding adhesive 17 (FIG. 2A) or by welding or by means of a sheath 18 (FIG. 2B) welded or not or via a
La présente invention n'est pas limitée au mode préféré de réalisation qui a été décrit à titre d'exemple non exhaustif. En particulier s'agissant d'un réservoir tampon tel que celui qui est divulgué dans le document EP.380696, il serait possible grâce à un traitement adéquat, notamment une fluoration par plasma, de rendre l'article d'écriture dans lequel il s'insère apte à être utilisé sur des supports non-absorbants, notamment tableaux effaçables à sec, ou des supports métalliques ou plastiques.The present invention is not limited to the preferred embodiment which has been described by way of non-exhaustive example. In particular in the case of a buffer tank such as that which is disclosed in document EP.380696, it would be possible, by means of an adequate treatment, in particular a plasma fluorination, to return the writing article in which it s insert inserts suitable for use on non-absorbent supports, in particular dry erase boards, or metallic or plastic supports.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9406026A FR2719806B1 (en) | 1994-05-11 | 1994-05-11 | Writing article in liquid ink, in particular solvent-based. |
FR9406026 | 1994-05-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0681924A1 true EP0681924A1 (en) | 1995-11-15 |
EP0681924B1 EP0681924B1 (en) | 1998-04-08 |
Family
ID=9463278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95490019A Expired - Lifetime EP0681924B1 (en) | 1994-05-11 | 1995-05-10 | Writing implement with fluid, especially solvent based |
Country Status (11)
Country | Link |
---|---|
US (1) | US5971646A (en) |
EP (1) | EP0681924B1 (en) |
JP (1) | JP3482032B2 (en) |
AT (1) | ATE164807T1 (en) |
BR (1) | BR9502011A (en) |
CA (1) | CA2148902C (en) |
DE (1) | DE69501976T2 (en) |
DK (1) | DK0681924T3 (en) |
ES (1) | ES2119343T3 (en) |
FR (1) | FR2719806B1 (en) |
RU (1) | RU2127672C1 (en) |
Families Citing this family (20)
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US6416242B1 (en) * | 1993-11-12 | 2002-07-09 | Dataprint R. Kaufmann Gmbh | Efficient fluid dispensing utensil |
DE19529865C2 (en) | 1995-08-14 | 2002-02-28 | Kaufmann R Dataprint | Device for applying liquids to a base by means of an application element |
US6503965B1 (en) * | 2000-08-24 | 2003-01-07 | Bic Corporation | Solvent-based non-fluorescent ink for writing instruments based upon pigment dispersions in non-aqueous solvents |
US6695517B2 (en) * | 2001-03-26 | 2004-02-24 | Sanford, L.P. | Free ink system |
US6457892B1 (en) | 2001-04-20 | 2002-10-01 | Avery Dennison Corporation | Writing instrument having a capillary hole through the container |
US6637965B1 (en) | 2001-06-22 | 2003-10-28 | Avery Dennison Corporation | Writing instrument having a reservoir between a tip and a capillary storage |
US6503015B1 (en) * | 2001-08-30 | 2003-01-07 | Jakks Pacific, Inc. | Marker pen |
WO2003044104A1 (en) * | 2001-11-19 | 2003-05-30 | Sanford L.P. | Metallic ink and capillary marker |
MXPA04009638A (en) * | 2002-04-01 | 2006-02-22 | Sanford Lp | Solvent system and ink made therefrom. |
US7044675B2 (en) * | 2002-12-10 | 2006-05-16 | Bic Corporation | Leak resistant writing instrument |
US7481593B2 (en) * | 2003-08-19 | 2009-01-27 | Sanford, L.P. | Combination hydrophobic/hydrophilic filters/reservoirs for controlling fluid flow |
US7467907B2 (en) | 2003-08-19 | 2008-12-23 | Sanford, L.P. | Valve mechanisms for paint or ink brush with integrated reservoir |
US20050202386A1 (en) * | 2004-03-15 | 2005-09-15 | Jehan Clements | Flip-over storytelling book publishing system, method, and kit |
JP2005334648A (en) | 2004-04-21 | 2005-12-08 | Acushnet Co | Transitioning hollow golf clubs |
US7137903B2 (en) | 2004-04-21 | 2006-11-21 | Acushnet Company | Transitioning hollow golf clubs |
KR100932571B1 (en) | 2004-09-14 | 2009-12-17 | 파일롯트 잉크 가부시키가이샤 | Direct Writing Instruments |
AR056792A1 (en) * | 2005-11-12 | 2007-10-24 | Unilever Nv | HAIR DISPENSER |
CN101379149A (en) * | 2006-01-31 | 2009-03-04 | 东海染工株式会社 | Marking ink |
US8696228B1 (en) * | 2010-04-23 | 2014-04-15 | Hairmarker Llc | Cosmetic marker |
US9163153B2 (en) | 2013-03-15 | 2015-10-20 | Sanford, L.P. | Metallic ink composition and writing instrument containing same |
Citations (3)
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FR2528361A1 (en) * | 1982-03-16 | 1983-12-16 | Parker Pen Co | WRITING INSTRUMENT AND METHOD OF MANUFACTURING |
EP0516538A1 (en) * | 1991-05-27 | 1992-12-02 | Conte S.A. | Writing implement with fluid comprising a microporous buffer reservoir |
DE4231978A1 (en) * | 1992-09-24 | 1994-03-31 | Dataprint Datendrucksysteme R | Ink-supply system to printing mechanism - has capillary pipe in contact with accumulator of lesser capillarity |
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US3501225A (en) * | 1968-07-19 | 1970-03-17 | Textron Inc | Fountain pen |
FR2439226A1 (en) * | 1978-10-20 | 1980-05-16 | Sakura Color Prod Corp | ERASABLE INK COMPOSITION FOR WRITING ON AN IMPENETRABLE SURFACE |
JPS604574A (en) * | 1983-06-22 | 1985-01-11 | Sakura Color Prod Corp | Ink composition for writing board |
JPS6218483A (en) * | 1985-07-16 | 1987-01-27 | Toyo Soda Mfg Co Ltd | Ink composition for writing board |
JPS63300708A (en) * | 1987-05-30 | 1988-12-07 | 益山興業株式会社 | Cosmetics applicator |
JP3049456B2 (en) * | 1992-03-31 | 2000-06-05 | オリヱント化学工業株式会社 | Ink composition for writing board |
US5290116A (en) * | 1992-06-23 | 1994-03-01 | Chang Shin Ju D | Flow control for writing instruments |
-
1994
- 1994-05-11 FR FR9406026A patent/FR2719806B1/en not_active Expired - Lifetime
-
1995
- 1995-05-08 CA CA002148902A patent/CA2148902C/en not_active Expired - Fee Related
- 1995-05-10 EP EP95490019A patent/EP0681924B1/en not_active Expired - Lifetime
- 1995-05-10 ES ES95490019T patent/ES2119343T3/en not_active Expired - Lifetime
- 1995-05-10 RU RU95107148A patent/RU2127672C1/en not_active IP Right Cessation
- 1995-05-10 AT AT95490019T patent/ATE164807T1/en not_active IP Right Cessation
- 1995-05-10 DK DK95490019T patent/DK0681924T3/en active
- 1995-05-10 DE DE69501976T patent/DE69501976T2/en not_active Expired - Lifetime
- 1995-05-11 JP JP13713295A patent/JP3482032B2/en not_active Expired - Fee Related
- 1995-05-11 BR BR9502011A patent/BR9502011A/en not_active IP Right Cessation
-
1997
- 1997-12-05 US US08/986,277 patent/US5971646A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2528361A1 (en) * | 1982-03-16 | 1983-12-16 | Parker Pen Co | WRITING INSTRUMENT AND METHOD OF MANUFACTURING |
EP0516538A1 (en) * | 1991-05-27 | 1992-12-02 | Conte S.A. | Writing implement with fluid comprising a microporous buffer reservoir |
DE4231978A1 (en) * | 1992-09-24 | 1994-03-31 | Dataprint Datendrucksysteme R | Ink-supply system to printing mechanism - has capillary pipe in contact with accumulator of lesser capillarity |
Also Published As
Publication number | Publication date |
---|---|
EP0681924B1 (en) | 1998-04-08 |
RU2127672C1 (en) | 1999-03-20 |
JPH07318377A (en) | 1995-12-08 |
RU95107148A (en) | 1996-12-27 |
CA2148902C (en) | 2006-02-21 |
FR2719806A1 (en) | 1995-11-17 |
FR2719806B1 (en) | 1996-08-02 |
DE69501976D1 (en) | 1998-05-14 |
US5971646A (en) | 1999-10-26 |
ATE164807T1 (en) | 1998-04-15 |
CA2148902A1 (en) | 1995-11-12 |
BR9502011A (en) | 1995-12-12 |
JP3482032B2 (en) | 2003-12-22 |
ES2119343T3 (en) | 1998-10-01 |
DK0681924T3 (en) | 1999-01-25 |
DE69501976T2 (en) | 1998-11-05 |
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