EP0391083B1 - Réservoir à encre - Google Patents

Réservoir à encre Download PDF

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Publication number
EP0391083B1
EP0391083B1 EP90104384A EP90104384A EP0391083B1 EP 0391083 B1 EP0391083 B1 EP 0391083B1 EP 90104384 A EP90104384 A EP 90104384A EP 90104384 A EP90104384 A EP 90104384A EP 0391083 B1 EP0391083 B1 EP 0391083B1
Authority
EP
European Patent Office
Prior art keywords
writing
air
permeable
membrane
space
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
EP90104384A
Other languages
German (de)
English (en)
Other versions
EP0391083A1 (fr
Inventor
Ronald Broers
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.)
Rotring International GmbH and Co KG
Original Assignee
Rotring International GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rotring International GmbH and Co KG filed Critical Rotring International GmbH and Co KG
Priority to AT90104384T priority Critical patent/ATE90277T1/de
Publication of EP0391083A1 publication Critical patent/EP0391083A1/fr
Application granted granted Critical
Publication of EP0391083B1 publication Critical patent/EP0391083B1/fr
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
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02—Ink reservoirs
    • B43K5/14—Exchangeable ink cartridges
    • B43K5/145—Exchangeable ink cartridges with valves
    • 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
    • B43K8/16—Pens with writing-points other than nibs or balls with tubular writing-points comprising a movable cleaning element
    • B43K8/165—Ink cartridges, ink reservoirs

Definitions

  • the invention relates to a writing liquid container with a side wall, with a front end wall which may be closed before use or which may have a closable liquid outlet opening, and with an intermediate wall opposite the end wall, which at least in a partial area consists of a membrane which is permeable to air, is impermeable to writing fluid, however, and behind which a space serving as a pressure compensation chamber is formed.
  • a known writing fluid container of this type (EP-A 0 243 922) has a cylindrical hollow body which extends rearward from the intermediate wall and is also closed at its rear end with an air-permeable but liquid-impermeable membrane and which releases water with a small air volume is filled so that water and air are trapped between the two membranes.
  • This writing fluid container which has the shape of an ink cartridge, is assembled with its front Held at the end, for example using the writing instrument that receives it, for writing, an overpressure in the space containing the writing fluid that may occur as a result of an increase in temperature causes the air between the writing fluid level and the partition to be compressed.
  • a problem with the known writing fluid container which leads to its inoperability, is that, for example, a negative pressure which arises when writing due to the consumption of writing fluid in the writing fluid storage space cannot be reduced, because in the writing position, i.e. in the position in which the front end of the writing fluid container points downwards, the at least partially consisting of a diaphragm intermediate wall is covered on its rear side by the water present in the pressure compensation space.
  • a negative pressure arising at the front of the membrane therefore does not lead to the entry of air from the Pressure equalization chamber in the writing fluid supply area, and for this reason, after a relatively short use of the associated writing instrument, no writing fluid is released from the writing fluid container, but is retained in it as a result of the built-up negative pressure.
  • a writing fluid container of the type mentioned at the outset is designed according to the invention in such a way that at least part of the end wall is formed by a membrane which is permeable to air but impermeable to liquid.
  • pressure equalization therefore takes place not only via the intermediate wall which closes off the writing fluid supply area at the rear and which at least partially consists of a membrane of the type of interest, but also via the end wall at least partially formed by a corresponding membrane.
  • a pressure compensation can result from air entering the writing fluid supply area through the membrane provided on the end wall, bubbling through the writing fluid and pressure compensation in the area above of the writing fluid level.
  • the outer ring region of the end wall can have passage openings which are covered by membrane material, so that stable wall material is present between these passage openings.
  • the improvement of the pressure equalization described above which can be achieved with the writing fluid container according to the invention, can be further improved in that the pressure equalizing space communicates with the ambient air via lip valves, one of the lip valves permeable in the direction out of the pressure equalizing space and one of the lip valves in the direction into the pressure equalizing space is.
  • pressure equalization takes place in the writing position of the writing instrument not only via the membrane areas of the end wall, but also also via the intermediate wall, ambient air entering through the lip valve permeable in the direction into the pressure equalization space.
  • the writing instrument shown in partial section has a front part 20, in the front end of which a writing tube 21 is inserted in the usual way, into which extends a cleaning wire (not shown) attached to the front end of the reciprocating falling weight body 22.
  • the inner bore of the front part 20, which receives the drop weight body 22, is closed with a drop weight retainer 23, which is held in a clamped or adhesive manner and has a coaxial through bore.
  • a shaft element 24 is plugged onto the front part 20 from behind, onto which a holder shaft element 25 is screwed from behind.
  • the rear end of the shaft element 24 and the front region of the holder shaft element 25 form the receiving space for a writing liquid container according to the invention.
  • the writing fluid container has a cylindrical outer wall 1, to which a rear transverse wall 4 connects, which has a ventilation hole 13.
  • a transversely arranged end wall 2 which has a cylindrical projection 3 through which a central bore extends concentrically, with which a correspondingly shaped cylindrical projection of the drop weight safety device 23 is in clamping engagement, so that the central bore of the Drop weight safety device 23 is connected to the interior of the writing fluid container.
  • the central bore extending through the cylindrical extension 3 can be closed by means of a film or a sealing element held in a clamped manner before the writing liquid container is inserted into the writing instrument and can be opened by plugging onto the cylindrical extension of the drop weight safety device 23.
  • the inner space surrounded by the cylindrical peripheral wall 1 is subdivided by an intermediate wall 7, for example held by clamping or adhesive, which is likewise formed by a membrane which is permeable to air, impermeable to liquid or is sealed by this.
  • the storage space for writing fluid 8 is formed between this intermediate wall 7 and the front wall 2, air 9 being also contained in this storage space, as shown.
  • the lip valve 12 is permeable in the direction from the intermediate wall 7 to the rear transverse wall 4, while the lip valve 11 is permeable in the opposite direction.
  • air can escape through the lip valve 12 at an overpressure in the pressure compensation space 10 between the lip valve arrangement and the intermediate wall 7 and air can enter through the lip valve 11 at a negative pressure in this pressure compensation space 10, that is to say the ambient pressure can be produced or maintained in a simple manner.
  • an overpressure for example due to an increase in temperature in the writing fluid storage space, can be reduced by air exiting through the membrane 6 and the passage openings 5 into the ambient air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
  • Coating Apparatus (AREA)

Claims (3)

  1. Réservoir à encre, comprenant une paroi latérale (1), une paroi frontale avant (2) percée d'un orifice de sortie du liquide obturé le cas échéant avant mise en service ou obturable, une paroi intermédiaire (7) faisant face à la paroi frontale (2) et constituée, sur au moins une partie, d'une membrane perméable à l'air, mais imperméable à l'encre et derrière laquelle se trouve un volume (10) servant de chambre d'équilibrage des pressions, caractérisé en ce qu'au moins une partie de la paroi frontale (2) est constituée par une membrane perméable à l'air, mais imperméable à l'encre.
  2. Réservoir à encre selon la revendication 1, caractérisé en ce que la zone annulaire externe de la paroi frontale (2) est percée d'orifices de passage (5) recouverts par la membrane (6).
  3. Réservoir à encre selon la revendication 1 ou 2, caractérisé en ce que la chambre d'équilibrage des pressions (10) est reliée à l'atmosphère à travers un jeu de soupapes à lèvres (11, 12), la soupape (11) s'ouvrant en direction de la chambre d'équilibrage (10), tandis que la soupape (12) s'ouvre dans le sens opposé.
EP90104384A 1989-04-04 1990-03-08 Réservoir à encre Expired - Lifetime EP0391083B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90104384T ATE90277T1 (de) 1989-04-04 1990-03-08 Schreibfluessigkeitsbehaelter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3910787 1989-04-04
DE3910787A DE3910787C1 (fr) 1989-04-04 1989-04-04

Publications (2)

Publication Number Publication Date
EP0391083A1 EP0391083A1 (fr) 1990-10-10
EP0391083B1 true EP0391083B1 (fr) 1993-06-09

Family

ID=6377769

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104384A Expired - Lifetime EP0391083B1 (fr) 1989-04-04 1990-03-08 Réservoir à encre

Country Status (5)

Country Link
EP (1) EP0391083B1 (fr)
JP (1) JPH02286294A (fr)
AT (1) ATE90277T1 (fr)
DE (2) DE3910787C1 (fr)
ES (1) ES2045597T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710871C2 (de) * 1997-03-15 2002-09-26 Eugen Philipps Vorrichtung zum Auftragen von Flüssigkeiten
WO2000063028A1 (fr) 1999-04-17 2000-10-26 A.W. Faber-Castell Unternehmensverwaltung Gmbh & Co. Applicateur
FR3027556B1 (fr) 2014-10-24 2016-11-25 SOCIéTé BIC Membrane de compensation de difference de pression
FR3067652B1 (fr) * 2017-06-15 2020-09-25 SOCIéTé BIC Instrument d'ecriture a encre libre comprenant une valve microfluidique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1047934A (fr) * 1950-08-03 1953-12-17 Stylographe à bille
CA1209093A (fr) * 1982-03-16 1986-08-05 Thomas D. Hall Instruments de graphisme, et leur fabrication
DE3703349A1 (de) * 1986-04-28 1987-10-29 Gore W L & Co Gmbh Tintenpatrone mit belueftungskoerper

Also Published As

Publication number Publication date
JPH02286294A (ja) 1990-11-26
ATE90277T1 (de) 1993-06-15
EP0391083A1 (fr) 1990-10-10
DE59001653D1 (de) 1993-07-15
DE3910787C1 (fr) 1990-09-27
ES2045597T3 (es) 1994-01-16

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