EP1971494A2 - Instrument d'ecriture incorporant un materiau granulaire dans le reservoir d'encre - Google Patents
Instrument d'ecriture incorporant un materiau granulaire dans le reservoir d'encreInfo
- Publication number
- EP1971494A2 EP1971494A2 EP07717800A EP07717800A EP1971494A2 EP 1971494 A2 EP1971494 A2 EP 1971494A2 EP 07717800 A EP07717800 A EP 07717800A EP 07717800 A EP07717800 A EP 07717800A EP 1971494 A2 EP1971494 A2 EP 1971494A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grains
- ink
- writing instrument
- reservoir
- instrument according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
- B43K5/02—Ink reservoirs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
- B43K7/08—Preventing leakage
-
- 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
-
- 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
- B43K8/03—Ink reservoirs; Ink cartridges
-
- 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 instrument that incorporates a granular material into its ink tank.
- US Pat. No. 2,528,408 of 1950 discloses an ink tank design of this type.
- This document discloses indeed a fountain pen whose ink reservoir is provided with a granular material.
- the structure of this material gives it a capillarity vis-à-vis the ink which is adapted to obtain a regular supply of pen ink.
- the granular material is sintered or has a distribution of grains inside the reservoir which is controlled.
- a sintered material which has a determined open porosity is difficult to achieve in large series in a reproducible manner. The sintering step then generates a significant additional cost for the pen.
- the filling of the reservoir with the ink is made difficult, since the penetration of the ink into the interstices of the sintered granular material is slow.
- the grains must be arranged in the tank in several steps, which represents a delicate and long step in the manufacture of the pen.
- European Patent Application EP 1 510 560 discloses an ink composition which comprises solid particles, in particular silica particles having a size of less than 200 ⁇ m (microns).
- the silica particles are an integral part of the ink, that is to say they are intended to be deposited with the dyes and the solvent of the ink on a writing medium such as paper.
- these must represent less than 5% by weight of the ink.
- An object of the present invention is to improve the capillarity of the ink in the reservoir of the writing instrument to obtain a regular supply of ink pen, while allowing rapid filling of the reservoir during the manufacture of the instrument.
- the invention provides a writing instrument which comprises an ink reservoir and a writing tip fluidly connected to the reservoir and through which the ink exits during use of the instrument.
- the reservoir contains, in addition to the ink, separate grains which have angles and sharp edges of significant dimensions relative to an apparent dimension d of said grains.
- the presence of sharp corners and edges on the grains should contribute to a capillary behavior of the ink in the reservoir which provides a regular feed of the writing tip with the ink, more than the arrangement of the grains between them.
- These sharp corners and edges result from the outer shape of the grains. It is therefore relief having dimensions of the same order of magnitude as the apparent dimension d, or the grain size, of a grain considered, that is to say a few tenths to several hundredths of its apparent dimension d.
- the ink flow rate through the tip is then constant.
- a large proportion of the ink initially contained in the reservoir can be restored during prolonged use of the writing instrument. It is assumed that these significant angles and sharp edges favorably modify the dynamics of the ink fluids between the grains, or even the physicochemical interactions between the ink and the grains, which would improve the restitution of the ink contained in the particles.
- capillary spaces formed between the grains are formed between the grains.
- the capillary spaces between the grains have substantially variable shapes and volumes because of the irregular shape of the grains, which would have a favorable effect on the regulation of the ink flow that the reservoir delivers in are together.
- the presence of sharp corners and edges also limits settlement or compaction of the grains in the reservoir, when the writing instrument is kept motionless in a fixed position. The operation of the writing instrument is then little affected by prolonged storage of the instrument without agitation of the grains.
- the presence of separated grains in the reservoir, which are immersed in the ink, also helps to reduce overpressures in the ink may be caused by shocks on the writing instrument. Ink leaks from the writing tip that could cause such shocks are then reduced or avoided. Since the grains are separated, that is to say they are not interconnected, they can simply be poured into the reservoir even if the shape of the latter is complex, and the ink can then be be be injected into the reservoir by means of a hollow needle. For example, the needle can be squeezed into the grains to the bottom of the reservoir, and then the ink is expelled from the needle between the grains during a gradual withdrawal of the needle. Fast and uniform filling of the tank can thus be obtained easily.
- the grains are essentially non-porous;
- the grains may consist of a mineral material
- the mineral material of some of the grains may comprise sand, calcium carbonate, corundum or crushed glass; the grains may have an average size, determined by laser granulometry on all the grains contained in the reservoir, which is between 40 ⁇ m and 550 ⁇ m;
- the - 95% of the grains contained in the tank may have at least one dimension less than 800 ⁇ m;
- 95% of the grains contained in the reservoir may have at least one dimension greater than 0.5 ⁇ m, and in particular greater than 150 ⁇ m;
- the individual grain size can vary in a ratio of less than 10 for 95% of the grains contained in the tank;
- the grains can have a particle size distribution according to their individual size which has a single maximum
- the grains can be at least partially mobile in the tank; - A portion of the volume of the tank, which may be greater than 10% thereof, may be free of grains;
- the portion of the volume of the reservoir which is free of grains may be less than 30% thereof, and preferably less than 20%;
- the ink may be a liquid ink, and preferably an aqueous type ink.
- the tank may have a wall which is at least partly transparent. Such a wall allows a user of the writing instrument to see the amount of ink remaining in the reservoir after a certain period of use of the instrument.
- the invention can be applied to writing instruments of different types.
- the writing tip may be a porous capillary tip, for example for a marker or a felt pen, a ball point, or an ink roller tip.
- FIG. 1 is a sectional view of a writing instrument according to the present invention.
- FIG. 2 schematically illustrates sand grains used for the invention
- FIG. 3 is a grain size distribution diagram of the grains contained in a writing instrument according to the invention.
- the dimensions of the different parts of the writing instrument which are shown in FIG. 1 do not correspond to dimensions, nor to ratios of real dimensions. In particular, these dimensions can be adapted to obtain a writing instrument that has a higher ink capacity, or to make a writing instrument that has a pocket size.
- the writing instrument shown in FIG. 1 is of the "rollerpen” type. It comprises an ink reservoir 1 which is limited by a side wall 10, a connector 2, and an inking roller 3 which constitutes the writing tip. The inking roller 3 is held, while remaining free in rotation, by a mount 4 which is fixed on an anterior end of the tank 1.
- the connector 2 allows a flow of the ink 11 which is contained in the tank 1 towards the roller inking 3.
- the venting device 5 may consist of a set of baffles, but other pressure compensation devices may be used alternately.
- Separate grains 12 of a solid material are contained in the tank 1, with the ink 11. These grains 12 can completely fill the volume of the tank 1. They are then immobilized against each other. Alternatively, the grains 12 may occupy only a determined fraction of the volume of the tank 1, for example 90% of it. In this case, 10% of the volume of the tank 1 are free of grains. When the grains do not completely fill the tank 1, they can move in it during a stirring of the writing instrument, or only under the effect of the movements applied to the instrument during use normal.
- the ink 11 which is contained in the reservoir 1 is distributed between the grains 12, in interstices formed by adjacent grains.
- the ink 11 flows between the grains 12 inside the tank 1, with apparent capillarity which allows a
- this apparent capillarity is modified by the shape of the grains 12, and that edges on the surface of these grains make it possible to obtain a particularly regular flow of the ink. at the level of the writing tip 3, and in any case significantly more regular than in the presence of the single connector 2.
- the inventors have further found that possible displacements of the grains 12 relative to each other also contribute to obtaining a smooth flow of the ink 11.
- the ink 11 can form bubbles or agglomerates in micro-zones of clogging inside the tank 1.
- the displacements of the grains then make it possible to eliminate such bubbles and to dissolve agglomerates.
- the movement of the grains can also be used to avoid sedimentation of the ink.
- the grains 12 When an impact is applied to the writing instrument, the grains 12, because they can move relative to each other, dampen a possible overpressure in the ink 11. This damping results from the friction that occurs along the edges of the grains. In this way, no ink leakage occurs by the writing tip 3 or by the device 5 venting the ink tank.
- the wall 10 of the tank 1 may be transparent, or have a transparent window, to display the level of the ink 11 remaining in the tank.
- the ink 11 preferably has a low viscosity.
- the ink 11 is liquid, as opposed to fatty inks whose viscosity is high. It may be an aqueous solvent ink, in particular.
- the inventors have found that the ink can be delivered with a particularly regular flow at the writing tip, over the lifetime of the writing instrument. In particular, no progressive reduction of the ink supply of the writing tip takes place before the final shutdown of this power supply.
- a grain tank according to the invention provides a refund rate, in the form of writing, of an amount of aqueous ink initially placed in the tank which is greater than the rate obtained with a reservoir.
- fiber buffer ("filler" in English).
- a restitution gain of at least 10% has been observed for certain prototypes according to the invention.
- the grains 12 are mineral grains, a capillary behavior of the ink 11 is observed in the reservoir 1, which is even more favorable for obtaining a smooth flow of the ink by the writing tip.
- the material of the grains may be of oxide or carbonate type.
- Alumina, in particular of the corundum type, silica, crushed glass, or calcium carbonate are grain materials for which satisfactory operations of the writing instrument have been observed. In addition, these materials are chemically inert vis-à-vis the inks used.
- sand is meant a powder essentially based on silica or calcium carbonate of natural origin.
- Several origins of sand have been tested, which correspond to various careers. Improved performance of the writing instrument has been achieved with natural sands of different origins. However, it appears after many tests that for a given ink some origins of sand give better results
- Figure 2 schematically reproduces a micrograph of such grains of sand 12. This micrograph was performed by scanning electron microscopy, with magnification x100. The sharp edges are very visible, as are the angles between these edges. These are angles and sharp edges significant dimensions relative to the apparent dimension d grain.
- grains having a porosity sufficient to contain in their pores a significant amount of ink but at the risk of seeing this ink retained in the pores because of the small dimensions thereof. compared to grains and interstices.
- the grains must have angles and sharp edges on the outside of significant dimensions so that the capillary spaces between the grains play their role, it being understood that the openings of the pores can not constitute in themselves such angles and sharp edges.
- defects or microscopic relief on the surface of rounded grains or beads would not achieve the same effects of grain capillarity and interstices vis-à-vis the ink.
- Figure 3 is a typical pattern of distribution of sand grain size. This particle size analysis was performed using a laser, using a commercially available apparatus.
- the horizontal axis indicates, in microns, the apparent dimension d of each grain, and the vertical axis indicates the fraction of the total volume of sand analyzed, the grains of which have the dimension indicated by the horizontal axis.
- the area of the surface between the curve and the horizontal axis is therefore 100%.
- 95% of the grains of the sand sample corresponding to FIG. 3 have at least one dimension greater than 150 ⁇ m. At the same time, 95% of the grains have at least a dimension of less than 750 ⁇ m.
- the curve has a maximum for grain size of approximately 320 ⁇ m.
- This dimension is also approximately equal to the average grain size, calculated over the whole of the sand sample analyzed.
- Such dimensions are adapted so that a large number of grains are simultaneously contained in the tank 1, which statistically ensures a homogeneous and reproducible behavior of the mixture of the grains 12 and the ink 11 inside the tank 1. in addition, these grain sizes are large enough to prevent certain grains 12 from being entrained by the ink 11 in the connector 2, or possibly brought into contact with the ink roller 3. A possible obstruction of the connector 2 and / or a blockage of the rotation of the ink roller 3 are thus avoided.
- Sand grains which have different dimensions from those shown in FIG. 3 have also given satisfactory characteristics of operation of the writing instrument. Nevertheless, the inventors have found that better characteristics are obtained when the mean grain size d m is between 40 ⁇ m and 550 ⁇ m, and / or when 95% of the grains have a dimension of less than 800 ⁇ m, and / or when 95% of the grains have a dimension greater than 0.5 ⁇ m, preferably greater than 150 ⁇ m. Moreover, it is preferable that the grains 12 that are contained in the tank 1 have limited variations in size. In particular, the individual dimension of the grains d preferably varies in a ratio of less than 10, for 95% of the grains.
- Such a granulometric characteristic makes it possible to prevent a large number of interstices between the larger grains being filled by smaller grains.
- the ink capacity of the tank 1 is then higher. This also makes it possible to avoid settling or segregation of the grains 12 according to their size, which would occur in the tank 1 after a long period of immobility of the writing instrument. The operation of the writing instrument is then constant, even when resuming use. Finally, it also reduces the risk of the grains forming a vault in the tank, which could disturb the regularity of ink supply of the writing tip.
- a grain size distribution according to their respective dimensions which has only one maximum is another criterion to ensure that the interstices between the grains form a free volume sufficient for the ink.
- the natural sand constituting the grains 12 may be washed, for example to prevent particles of powder or dust on the surface of the grains from altering their capillary properties. But preference will be given to treatments modifying the surface of the grains, such as attacks or chemical deposits, given the satisfactory results obtained by the shape of the grains and the cost that could result from such treatments.
- the tank 1 contains only grains of the same kind and preferably of mineral material. Nevertheless, it is not excluded that the reservoir contains a fraction of different types of grains, for example of polymeric or metallic material, or that it contains a fibrous element in particular to limit the mobility of the grains.
- the writing instrument which has been described in detail above may be modified while retaining at least some of the advantages of the invention.
- the invention is not limited to its application to a writing instrument of the "rollerpen” type, and can be applied to all types of writing instruments, such as pens, in particular feather pens. , markers, coloring or highlighting instruments.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pens And Brushes (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0600335A FR2896184B1 (fr) | 2006-01-13 | 2006-01-13 | Instrument d'ecriture incorporant un materiau granulaire dans le reservoir d'encre |
PCT/FR2007/000062 WO2007080331A2 (fr) | 2006-01-13 | 2007-01-12 | Instrument d'ecriture incorporant un materiau granulaire dans le reservoir d'encre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1971494A2 true EP1971494A2 (fr) | 2008-09-24 |
EP1971494B1 EP1971494B1 (fr) | 2010-03-31 |
Family
ID=36763190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07717800A Active EP1971494B1 (fr) | 2006-01-13 | 2007-01-12 | Instrument d'ecriture incorporant un materiau granulaire dans le reservoir d'encre |
Country Status (10)
Country | Link |
---|---|
US (1) | US8348540B2 (fr) |
EP (1) | EP1971494B1 (fr) |
JP (1) | JP4938029B2 (fr) |
CN (1) | CN101370672B (fr) |
AT (1) | ATE462581T1 (fr) |
BR (1) | BRPI0706496A2 (fr) |
CA (1) | CA2639873A1 (fr) |
DE (1) | DE602007005596D1 (fr) |
FR (1) | FR2896184B1 (fr) |
WO (1) | WO2007080331A2 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5336162B2 (ja) * | 2008-11-20 | 2013-11-06 | 計一 明石 | 芳香機能付筆記用具 |
US9290036B2 (en) * | 2013-03-14 | 2016-03-22 | Crayola Llc | Roller ball pen for use with metallic inks |
JP7007695B2 (ja) * | 2016-07-04 | 2022-01-25 | 株式会社トキワ | 塗布体付き化粧料容器 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2097256A (en) * | 1936-12-18 | 1937-10-26 | Salz Ignatz | Fountain pen |
BE479509A (fr) * | 1946-05-30 | |||
US2528408A (en) * | 1947-07-11 | 1950-10-31 | Parker Pen Co | Fountain pen |
US2462929A (en) * | 1946-07-17 | 1949-03-01 | Parker Pen Co | Fountain pen |
FR1026695A (fr) * | 1950-10-30 | 1953-04-30 | J Maillocheau Ets | Régulateur de débit d'un liquide, applicable, notamment, comme régulateur de débit d'encre, pour appareils à écrire |
US2911949A (en) * | 1955-01-10 | 1959-11-10 | Parker Pen Co | Writing instrument |
CH516413A (de) * | 1970-11-30 | 1971-12-15 | Ananda Anlageanst | Füllmaterial für Tintenreservoire von Schreibgeräten |
DE2437503A1 (de) * | 1974-08-03 | 1976-02-19 | Astronaut Pen Exploit Co Jerse | Schreibgeraet mit einer schreibkugel |
DE3824941C2 (de) * | 1988-07-22 | 1998-10-29 | Ipac Haushalt & Technik Gmbh E | Dochtschreiber |
WO2003018329A1 (fr) * | 2001-08-31 | 2003-03-06 | Mitsubishi Pencil Kabushikikaisha | Outil d'ecriture |
JP3502088B2 (ja) | 2002-05-31 | 2004-03-02 | 三菱鉛筆株式会社 | 加圧ボールペン用インキ組成物 |
FR2896183B1 (fr) * | 2006-01-13 | 2010-02-12 | Bic Soc | Instrument d'ecriture comprenant un dispositif de mise a l'air libre du reservoir |
-
2006
- 2006-01-13 FR FR0600335A patent/FR2896184B1/fr not_active Expired - Fee Related
-
2007
- 2007-01-12 CN CN2007800030645A patent/CN101370672B/zh not_active Expired - Fee Related
- 2007-01-12 US US12/160,846 patent/US8348540B2/en active Active
- 2007-01-12 JP JP2008549910A patent/JP4938029B2/ja not_active Expired - Fee Related
- 2007-01-12 CA CA002639873A patent/CA2639873A1/fr not_active Abandoned
- 2007-01-12 AT AT07717800T patent/ATE462581T1/de not_active IP Right Cessation
- 2007-01-12 BR BRPI0706496-9A patent/BRPI0706496A2/pt not_active Application Discontinuation
- 2007-01-12 DE DE602007005596T patent/DE602007005596D1/de active Active
- 2007-01-12 EP EP07717800A patent/EP1971494B1/fr active Active
- 2007-01-12 WO PCT/FR2007/000062 patent/WO2007080331A2/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007080331A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007080331A3 (fr) | 2007-09-20 |
FR2896184B1 (fr) | 2011-02-11 |
WO2007080331A2 (fr) | 2007-07-19 |
BRPI0706496A2 (pt) | 2011-03-29 |
CN101370672A (zh) | 2009-02-18 |
US20100158600A1 (en) | 2010-06-24 |
EP1971494B1 (fr) | 2010-03-31 |
FR2896184A1 (fr) | 2007-07-20 |
JP4938029B2 (ja) | 2012-05-23 |
CN101370672B (zh) | 2011-03-23 |
CA2639873A1 (fr) | 2007-07-19 |
JP2009523078A (ja) | 2009-06-18 |
ATE462581T1 (de) | 2010-04-15 |
DE602007005596D1 (de) | 2010-05-12 |
US8348540B2 (en) | 2013-01-08 |
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