EP0803381B1 - Pufferbehälter für Flüssigkeitsschreibgerät und Schreibgerät mit einem solchen Behälter - Google Patents

Pufferbehälter für Flüssigkeitsschreibgerät und Schreibgerät mit einem solchen Behälter Download PDF

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Publication number
EP0803381B1
EP0803381B1 EP97490009A EP97490009A EP0803381B1 EP 0803381 B1 EP0803381 B1 EP 0803381B1 EP 97490009 A EP97490009 A EP 97490009A EP 97490009 A EP97490009 A EP 97490009A EP 0803381 B1 EP0803381 B1 EP 0803381B1
Authority
EP
European Patent Office
Prior art keywords
microbeads
ink
reservoir
hydrophilic
buffer reservoir
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 - Lifetime
Application number
EP97490009A
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English (en)
French (fr)
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EP0803381A1 (de
Inventor
José Duez
Vincent Bedhome
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.)
Conte SA
Original Assignee
Conte SA
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Filing date
Publication date
Application filed by Conte SA filed Critical Conte SA
Publication of EP0803381A1 publication Critical patent/EP0803381A1/de
Application granted granted Critical
Publication of EP0803381B1 publication Critical patent/EP0803381B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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

Definitions

  • the present invention relates to the field of ink writing articles liquid, i.e. in which the ink is in the free state, not being trapped in a fibrous reservoir.
  • a writing article has a reservoir for ink and a point ensuring by capillary action the transfer of ink from this reservoir up to the actual writing head which may consist of the end of said point.
  • the buffer tank which is made of a hydrophobic material open pore, consists of at least one compact, adjusted block without clamping around the transfer point, coaxial with it.
  • the porous hydrophobic material is based on microbeads or microspheres, by example in polypropylene.
  • the buffer tank provided in document EP 0516538 gives functional satisfaction, i.e. it technically fulfills the absorption and restitution function of the excess ink arriving in the tip if the pressure in the ink tank changes.
  • the efficiency of the buffer tank decreases radially as one moves away from the area of contact with the transfer tip.
  • the ink diffuses without difficulty from the point transfer to the buffer tank in an area relatively close to the tip transfer, an area which, depending on the case, may be of the order of 2 to 4 mm.
  • the useful volume of the buffer tank is a function of the volume maximum excess ink likely to be caused by such variation.
  • This excess ink depends in particular on the volume of air contained in the tank liquid ink, since it's usually an increase in temperature of air contained in this tank which will cause the pressure variation causing this excess ink in the tip. The less ink remains in the tank, the more air it contains, the more excess ink, for a same temperature increase.
  • the aim which is sought by the applicant is to propose a buffer tank which overcomes the aforementioned drawback.
  • the buffer tank of the invention which in a manner known from document EP 0516538 is a buffer tank for a writing article containing liquid ink, said writing article comprising a reservoir, a transfer point opening into the reservoir, said reservoir pad capable of absorbing and restoring excess ink in the event of variation in the pressure prevailing in the tank and being produced in the form of a compact block made of an open pore material based on microbeads.
  • the buffer tank is consisting of microbeads of a hydrophobic nature with respect to said ink and, in reduced proportion of microbeads of hydrophilic nature with respect to said ink.
  • hydrophilia and hydrophobia is a relative concept, which is related to the nature of the ink, in particular its viscosity and its surface tension. Is considered hydrophilic compared to an ink determined - and even if this ink would not have water as a solvent - a porous material in which said ink naturally diffuses into normal conditions of use; is considered hydrophobic compared to the same ink, a porous material in which said ink does not diffuse in normal conditions of use.
  • a given material can be hydrophobic for a given ink and hydrophilic for another ink.
  • the polypropylene is hydrophobic for an aqueous ink without additive likely to modify its surface and hydrophilic tension for a solvent type ink to alcohol.
  • excess ink can diffuse in the hydrophobic material when the conditions of use are changed, especially by abnormal increase in pressure.
  • hydrophilic microbeads in reduced proportion, among the hydrophobic microbeads unexpectedly promotes the diffusion of ink throughout the volume of the buffer tank, well beyond the peripheral zone which is in direct contact with the ink, especially on the surface of the transfer tip.
  • the difficulty for the ink to diffuse through the network formed by the hydrophobic microbeads of the buffer tank is due to pressure losses increasing as one moves away radially from the periphery of the transfer point.
  • Having locally hydrophilic microbeads on the path of the ink in the microbead network hydrophobic allows ink to reach hydrophobic sites that were inaccessible in the case of a buffer tank consisting exclusively of hydrophobic microbeads.
  • hydrophobic and hydrophilic microbeads can result from a homogeneous mixture throughout the volume of the buffer tank.
  • hydrophilic microbeads can also consist of a differentiated mixture, the proportion of hydrophilic microbeads being weaker in the area immediately in contact with excess ink and being more prominent in the most distant area.
  • hydrophilic microbeads On average, the proportion of hydrophilic microbeads is between 2 and 10% relative to the total weight of the buffer tank.
  • a second object of the invention is to propose a writing article comprising such a buffer tank, said buffer tank being adjusted without clamping around the transfer point coaxially with the latter.
  • the writing article 1 which is represented in FIG. 1 is in accordance with the teaching of the document EP 0516538 of the applicant. It is composed of a body 2, a transfer tip 3 and a buffer tank 4.
  • the body 2 has its rear part which constitutes a tank 5 for the liquid ink, tank which is closed by an internal partition 6.
  • the transfer point 3 has its rear end 3 a which opens into the tank 5 through the interior partition 6; its front end 3b constitutes the writing tip and opens out of the body 2 through a central orifice 7.
  • the buffer tank 4 which is able to absorb and restore the excess ink coming from the tip 3 by capillarity in the event of of variation of the pressure prevailing in the ink tank 5, is made of an open-pore material based on microbeads and is in the form of a compact block adjusted loosely around the tip 3 coaxial thereto .
  • the ink 8 coming from the reservoir 5 is consumed by the writing tip 3 b as it is used and is replaced by air which can circulate freely between the ambient space and said reservoir 5 thanks to the natural porosity of the transfer point 3 but also to a communication orifice 9 made at the level of the central orifice 7 through which the writing point 3 b passes and to a free space 10 surrounding the buffer tank 4.
  • the buffer tank 4 is a compact porous block based on microbeads whose grade, particle size as well as distribution, molecular weight and morphology are known.
  • this compact block can be obtained by thermofusion of a mixture of microbeads of at least two thermoplastic materials of different grade, that is to say two materials having different melting temperatures. After a homogeneous mixture of the microbeads in a suitable mold, they are brought to a given temperature which is higher than the melting temperature of the material of the first type and lower than the melting temperature of the material of the second type. In this way the material constituting the microbeads of the first type bottom, which on the one hand creates the microcavities corresponding to the open pores and on the other hand ensures the cohesion of all the microbeads of the materials of the second type.
  • the compact block can be obtained from microbeads of a single thermoplastic material by simple sintering, the capillary network being formed by the interstices between the microbeads, after localized fusion and bonding thereof.
  • the ink 8 which is contained in the reservoir 5 and which is in contact with the rear end 3 a of the transfer point 3 is absorbed and migrates by capillary action in the point 3 to its front end 3 b .
  • the ink consumed by this front end 3 b serving as a writing head is gradually replaced by the ink 8 coming from the reservoir 5.
  • the ink which diffuses in the transfer point 3 is itself replaced by air coming from inside the body 2. A pressure balance is thus established between the air contained in the tank 5 and the air prevailing in the rest of the body 2.
  • the buffer tank 4 can store all the excess ink that may leak from transfer tip 3 if abnormal increase in pressure inside the tank 5.
  • This capacity is a function of the capacity of the reservoir 5 of liquid ink 8, this excess being maximum when the ink tank contains a large proportion of air which tends to expand strongly when the temperature of the article increases 1.
  • this theoretical volume was not always sufficient to absorb all of the excess ink, as long as there was no complete saturation of the buffer tank, the ink not being able to diffuse radially beyond a certain distance from the face which is in contact with the transfer point 3.
  • This distance is a function of the nature, in particular of the surface tension and viscosity of the ink 8 and also of the constitution from buffer tank 4.
  • the effective distance is say where the buffer tank is saturated, can be limited to 2 to 3 mm.
  • the aforementioned difficulty has been resolved by using in the constitution of the buffer tank 4, from microbeads, microbeads to hydrophobic character, and in a lesser proportion, microbeads with character hydrophilic, according to the particular definition which has been given above to the notions hydrophilicity and hydrophobia.
  • hydrophilic microbeads have the effect of facilitating the diffusion of the ink throughout the volume of the buffer tank.
  • hydrophilic microbeads with an average diameter between 25 and 250 ⁇ m, the adequate proportion to obtain the technical effect above was between 2 and 10% hydrophilic polyethylene relative to all the microbeads constituting the buffer tank.
  • microbeads which are hydrophobic for the most part and a hydrophilic character for a reduced proportion. Hydrophobic character or hydrophilic microbeads is obtained depending on the type of ink used or the made of the choice of the constituent material of the microbeads or because of a treatment suitable prerequisite, for example by fluorinated plasma to give the character hydrophobic or by an oxidation treatment to give the character hydrophilic or by the deposition of a surfactant to bring the energy of surface of the material at a determined value, depending on the desired character.
  • a mixture of hydrophobic microbeads and hydrophilic was produced homogeneously throughout the tank volume buffer.
  • the mixture contained 95% hydrophobic microbeads and 5% hydrophilic microbeads.
  • the buffer tank had a shape cylindrical in the order of 12.5 mm in diameter, the transfer point arranged axially in the buffer tank had a diameter of the order of 5 mm.
  • the buffer tank behaves as if it were a material completely hydrophilic. In other words, the ink diffuses into the material in question even if the conditions of use are normal conditions. This is of course not the technical function that is sought for a tank buffer.
  • the buffer tank must absorb and return the excess ink from abnormal use, and not consist of a storage medium where the ink would be stored in addition to the liquid ink tank.
  • the maximum percentage of microbeads, allowing to obtain the desired effect, improved migration of the ink was around 10%. This proportion may change depending on the nature of the ink, and the nature and size of the microbeads. So it comes down to those skilled in the art to determine precisely, as a function of these parameters, what is the optimal proportion to keep for hydrophilic microbeads by compared to all of the microbeads used to build the reservoir buffer.
  • the ink 8 is slowed down in its diffusion from the face in contact with the transfer point 3 due to the existence pressure losses in the capillary network of the buffer tank 4.
  • this diffusion is very good in the area immediately in contact with the ink. Consequently, in this zone, it would be possible to use microbeads having only the hydrophobic character, or possibly a proportion still more reduced of hydrophilic microbeads.
  • the buffer tank can then be in the form of elements annular, fitting into each other, the most annular element exterior with the highest proportion of hydrophilic microbeads.
  • FIG 2 there is shown a buffer tank 4 which is constituted of three successive elements 4 ', 4' ', 4' '', fitted one inside the other, in which the proportion in hydrophilic microbeads was respectively 2% for the innermost 4 'element, 6% for the intermediate 4' 'element and 10% for the outermost 4 '' element.
  • microbeads entering the composition of the buffer tank is determined by depending on the characteristics sought. It can be polyethylene as in the above example or other materials such as in particular the polypropylene. Hydrophilic microbeads can be in a material different from hydrophobic microbeads.
  • microbeads having different dimensions or even a different grade for the realization of microbeads with hydrophobic characteristics and / or microbeads with hydrophilic character.

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  • Pens And Brushes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (8)

  1. Pufferbehälter (4) für ein Schreibgerät (1), das eine Flüssigtinte (8) enthält, wobei das Schreibgerät (1) einen Behälter (5) für die Flüssigtinte (8) und eine Übertragungsspitze (3) aufweist, die im Behälter (5) mündet, wobei der Pufferbehälter (4) bei einer Veränderung des im Behälter (5) herrschenden Drucks den Überschuß an Tinte (8) absorbieren und wieder abgeben kann und in Form eines kompakten Blocks aus einem Material mit offenen Poren auf der Basis von Mikrokugeln hergestellt ist, dadurch gekennzeichnet, daß er aus Mikrokugeln mit gegenüber der Tinte hydrophoben Eigenschaften und, in einem geringeren Anteil, aus Mikrokugeln mit gegenüber der Tinte hydrophilen Eigenschaften besteht.
  2. Pufferbehälter nach Anspruch 1, dadurch gekennzeichnet, daß das Verhältnis von hydrophoben und hydrophilen Mikrokugeln im ganzen Volumen des Pufferbehälters (4) eine homogene Mischung ist.
  3. Pufferbehälter nach Anspruch 1, dadurch gekennzeichnet, daß das Verhältnis von hydrophoben und hydrophilen Mikrokugeln eine differenzierte Mischung ist, wobei der Anteil an hydrophilen Mikrokugeln in dem direkt mit dem Überschuß an Tinte in Kontakt stehenden Bereich geringer und in dem am weitesten entfernten Bereich höher ist.
  4. Pufferbehälter nach Anspruch 3, dadurch gekennzeichnet, daß er aus ringförmigen Elementen (4', 4'', 4''') besteht, die sich ineinander schieben, wobei der Anteil an hydrophilen Mikrokugeln im Element (4'), das mit dem Überschuß an Tinte am nächsten in Kontakt steht, geringer, und im am weitesten enfernten Element (4''') höher ist.
  5. Pufferbehälter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Anteil an hydrophilen Mikrokugeln zwischen 2 und 10% bezogen auf das Gesamtgewicht des Pufferbehälters (4) liegt.
  6. Pufferbehälter nach Anspruch 2, dadurch gekennzeichnet, daß die homogene Mischung aus etwa 95% hydrophoben Mikrokugeln und aus etwa 5% hydrophilen Kugeln besteht.
  7. Pufferbehälter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die hydrophilen Mikrokugeln aus einem anderen Material bestehen und/oder andere Anmessungen und/oder eine andere Qualität aufweisen als die hydrophoben Mikrokugeln.
  8. Schreibgerät (1), das einen Behälter (5) für die Flüssigtinte (8), eine Übertragungsspitze (3), die im Behälter (5) mündet, und einen Pufferbehälter (4) nach einem der Ansprüche 1 bis 7 aufweist, wobei der Pufferbehälter um die Übertragungsspitze (3) herum und koaxial zu ihr ohne Klemmung angepaßt wird.
EP97490009A 1996-04-23 1997-04-10 Pufferbehälter für Flüssigkeitsschreibgerät und Schreibgerät mit einem solchen Behälter Expired - Lifetime EP0803381B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605344 1996-04-23
FR9605344A FR2747611B1 (fr) 1996-04-23 1996-04-23 Reservoir tampon pour article d'ecriture a encre liquide et article d'ecriture comportant un tel reservoir

Publications (2)

Publication Number Publication Date
EP0803381A1 EP0803381A1 (de) 1997-10-29
EP0803381B1 true EP0803381B1 (de) 1999-09-29

Family

ID=9491660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97490009A Expired - Lifetime EP0803381B1 (de) 1996-04-23 1997-04-10 Pufferbehälter für Flüssigkeitsschreibgerät und Schreibgerät mit einem solchen Behälter

Country Status (13)

Country Link
US (1) US5927885A (de)
EP (1) EP0803381B1 (de)
JP (1) JP3875351B2 (de)
AR (1) AR006775A1 (de)
AT (1) ATE185112T1 (de)
BR (1) BR9701906A (de)
CA (1) CA2202713C (de)
DE (1) DE69700558T2 (de)
DK (1) DK0803381T3 (de)
ES (1) ES2139429T3 (de)
FR (1) FR2747611B1 (de)
GR (1) GR3032040T3 (de)
RU (1) RU2164209C2 (de)

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US6322268B1 (en) * 1993-11-12 2001-11-27 Avery Dennison Corporation Efficient fluid dispensing utensil
US6416242B1 (en) * 1993-11-12 2002-07-09 Dataprint R. Kaufmann Gmbh Efficient fluid dispensing utensil
DE19529865C2 (de) 1995-08-14 2002-02-28 Kaufmann R Dataprint Gerät zum Auftragen von Flüssigkeiten auf eine Unterlage mittels eines Auftragselements
CA2246422A1 (en) * 1997-08-29 1999-02-28 The Pilot Ink Co., Ltd. Direct liquid supply writing implement
AU5891400A (en) 1999-06-28 2001-01-31 Sanford L.P. Free ink system
DE19930540B4 (de) 1999-06-28 2004-04-22 Sanford Gmbh Hand-Auftraggerät
DE59900500D1 (de) * 1999-07-05 2002-01-17 Schwan Stabilo Schwanhaeusser Vorrichtung zum Auftragen einer Schreibflüssigkeit auf eine Fläche
JP4614530B2 (ja) * 2000-12-08 2011-01-19 豊国商事株式会社 インクの自動流出調整機能を有する筆記具
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
US20040241490A1 (en) * 2003-03-28 2004-12-02 Finley James J. Substrates coated with mixtures of titanium and aluminum materials, methods for making the substrates, and cathode targets of titanium and aluminum metal
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
CN100467282C (zh) * 2004-06-22 2009-03-11 堀弥生 液体供应装置
AR056792A1 (es) * 2005-11-12 2007-10-24 Unilever Nv Dispensador capilar
FR2896183B1 (fr) * 2006-01-13 2010-02-12 Bic Soc Instrument d'ecriture comprenant un dispositif de mise a l'air libre du reservoir
US8517728B2 (en) * 2007-01-24 2013-08-27 Colgate-Palmolive Company Oral care implement having fluid delivery system
FR2964052B1 (fr) 2010-08-25 2012-09-14 Cie Francaise Eiffel Construction Metallique Procede et systeme de detubage, en particulier de condenseurs
EP2758097A4 (de) 2011-09-21 2015-07-01 Bayer Medical Care Inc Kontinuierliche multi-fluid-pumpvorrichtung, antrieb sowie betätigungssystem und -verfahren dafür
RU2531891C1 (ru) * 2013-10-30 2014-10-27 Дмитрий Александрович Павлов Пишущая ручка
RU2714926C2 (ru) 2015-01-09 2020-02-21 БАЙЕР ХелсКер ЛЛСи Многофлюидная система доставки с многоразовым расходным комплектом и ее конструкционные особенности
CN105644195A (zh) * 2016-02-15 2016-06-08 温其洲 马克笔
CN106079967A (zh) * 2016-07-29 2016-11-09 温莉 马克笔的加墨方法
CN106113995A (zh) * 2016-07-29 2016-11-16 温莉 马克笔

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US3501225A (en) * 1968-07-19 1970-03-17 Textron Inc Fountain pen
JPH0332896A (ja) * 1989-06-29 1991-02-13 Pentel Kk 筆記具の一時的インキ溜め部材の改質方法
DE4115685C3 (de) * 1991-05-14 2001-07-05 Dataprint Datendrucksysteme R Schreibgerät mit in einem Behälter frei aufgenommener Schreibflüssigkeit
FR2676969B1 (fr) * 1991-05-27 1996-08-23 Conte Sa Article d'ecriture a encre liquide comportant un reservoir tampon-microporeux.
US5290116A (en) * 1992-06-23 1994-03-01 Chang Shin Ju D Flow control for writing instruments
FR2730188B1 (fr) * 1995-02-07 1997-04-25 Conte Article d'ecriture ou de coloriage a encre realise a partir d'un bloc compact en materiau poreux

Also Published As

Publication number Publication date
US5927885A (en) 1999-07-27
RU2164209C2 (ru) 2001-03-20
FR2747611A1 (fr) 1997-10-24
DE69700558T2 (de) 2000-03-02
ATE185112T1 (de) 1999-10-15
JPH1044680A (ja) 1998-02-17
FR2747611B1 (fr) 1998-07-10
CA2202713C (en) 2005-04-12
ES2139429T3 (es) 2000-02-01
JP3875351B2 (ja) 2007-01-31
DE69700558D1 (de) 1999-11-04
CA2202713A1 (en) 1997-10-23
BR9701906A (pt) 1998-11-10
MX9702953A (es) 1997-10-31
AR006775A1 (es) 1999-09-29
EP0803381A1 (de) 1997-10-29
GR3032040T3 (en) 2000-03-31
DK0803381T3 (da) 2000-03-27

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