EP0405768A1 - Hydrophobe Lüftungsvorrichtung für einen Behälter eines Schreibers für flüssige Tinte - Google Patents

Hydrophobe Lüftungsvorrichtung für einen Behälter eines Schreibers für flüssige Tinte Download PDF

Info

Publication number
EP0405768A1
EP0405768A1 EP90306121A EP90306121A EP0405768A1 EP 0405768 A1 EP0405768 A1 EP 0405768A1 EP 90306121 A EP90306121 A EP 90306121A EP 90306121 A EP90306121 A EP 90306121A EP 0405768 A1 EP0405768 A1 EP 0405768A1
Authority
EP
European Patent Office
Prior art keywords
reservoir
pen
ink
vent
hydrophobic
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.)
Withdrawn
Application number
EP90306121A
Other languages
English (en)
French (fr)
Inventor
Dustin E. Dunn
Stephen F. Case
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0405768A1 publication Critical patent/EP0405768A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B43K8/14—Pens with writing-points other than nibs or balls with coreless tubular writing-points
    • B43K8/146—Ink cartridges, ink reservoirs
    • 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
    • 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

Definitions

  • the present invention is directed to the field of relatively inexpensive disposable ink pens which use a self contained supply of liquid ink. Such pens are of widespread use wherever a continuous steady flow of ink is required and interruptions, i.e. "skipping" in the line drawn by the pen, cannot be tolerated. Such applications include, but are not limited to, computer driven plotter pens.
  • the present invention is particularly concerned with a replaceable liquid ink pen useful as a plotter pen.
  • Prior art liquid ink pens have a sealed reservoir of liquid ink which is provided with a capillary or channel vent of small dimensions so as to prevent ink leakage through the capillary or channel vent. These pens deliver ink to a writing media from the tip of the pen via the capillary force of the pen nib and the media. As ink supply in the reservoir is depleted, the pressure in the reservoir drops until an air bubble forms at the interface between the reservoir and the vent. The bubble enters the reservoir and replaces the depleted ink with air, momentarily relieving the pressure difference. This process occurs throughout the life of the pen.
  • the temperature of the ambient air may decrease causing the reservoir to cool with a resulting internal pressure drop which causes air to bubble into the reservoir.
  • Subsequent temperature rises reverse the process and may cause movement of ink into the venting channel or venting capillaries if the orientation of the pen is such that the ink in the reservoir covers the end of the venting channel or capillaries. If the air expansion is sufficient, ink completely fills the venting channel or capillaries followed by leakage out of the pen. The same scenario occurs with decreases in ambient pressure.
  • the present invention accordingly provides a free liquid ink reservoir pen comprising:
  • air flow to vent the reservoir is not restricted by bubble generation. Air venting of the pens disclosed herein does not regulate ink flow since the reservoir is essentially open to atmosphere.
  • Figures 1 and 2 show an elongated pen reservoir body 2 of cylindrical configuration having a retaining collar 3 and a tapered tip portion 4 provided with a porous of hollow pen nib 6 centrally mounted therein.
  • the upper end of the reservoir body 2 is preferably closed by a vent cap 10 which is press fit into the upper end of the reservoir body 2 to define an ink chamber 12 therein.
  • the reservoir body 2 is conveniently made of clear plastic material so that the color and amount of the ink therein is easily determined.
  • the upper end of the reservoir body 2 has a vent in the form of one or more radially distributed vent passageways 13 and a piece 14 of hydrophobic venting material disposed between the ink chamber 12 and the passageways 13 therein to prevent flow of liquid ink through the passageways 13.
  • the hydrophobic venting material may be a generally flat sheet of material as shown or may be a plug of material or any suitable shape so long as it permits air to freely pass therethrough but also prevents passage of ink to thereby prevent leakage of ink from the chamber 12.
  • a presently preferred hydrophobic venting material is a porous plastic material sold under the trademark GORETEX by Gore, Inc. of Elkton, Maryland. Other materials believed suitable are porous polytetrafluoroethylene materials such as TEFLON (Trademark of Dupont Company).
  • Figures 3 and 4 show an embodiment like the embodiment of Fig. 1, but which is also provided with a vented wall 20 near the tip portion 4 of the pen.
  • the vent wall 20 is planar and has a plurality of vent bores 22 therethrough arranged in circular pattern around the pen nib 6.
  • An annular ring 24 of hydrophobic venting material is disposed inside the ink chamber 12 in tight engagement with the interior surface of the vent wall 20 whereby ink in the chamber is prevented from leaking between ring 24 and end wall 20 then through the vent bores 22 which are closed by the hydrophobic material.
  • atmospheric venting of the ink chamber through the hydrophobic material and vents at the cap end or at the vent wall end of the ink chamber takes place without leakage of the pen.
  • Figure 5 shows a third embodiment of the invention similar to the embodiment of Fig. 1, but in which a conical plug 30 of hydrophobic venting material extends inwardly into the ink chamber 12 from the vent cap 10.
  • Figure 5 is shown in inverted non-writing position with the liquid level L of the ink of the filled reservoir as shown slightly below the apex 32 of the conical plug 30 of hydrophobic material.
  • the air in the ink chamber 12 of the Fig. 3, embodiment is thus permitted to pass back and forth to atmosphere through conical plug 30 of hydrophobic venting material regardless of the orientation of the pen.
  • Figure 6 is a graph comparing ink flow characteristics of the present invention with those of filler reservoir pens of the prior art. As seen in the graph, the amount of ink delivered to the media gradually decreases as the ink supply is exhausted in prior art filler reservoir pens. In comparison, the amount of ink delivered to the paper or other media remains substantially constant regardless of the amount of ink which has been used for the free liquid ink vented pens of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
EP90306121A 1989-06-29 1990-06-05 Hydrophobe Lüftungsvorrichtung für einen Behälter eines Schreibers für flüssige Tinte Withdrawn EP0405768A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37373589A 1989-06-29 1989-06-29
US373735 1999-08-13

Publications (1)

Publication Number Publication Date
EP0405768A1 true EP0405768A1 (de) 1991-01-02

Family

ID=23473654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90306121A Withdrawn EP0405768A1 (de) 1989-06-29 1990-06-05 Hydrophobe Lüftungsvorrichtung für einen Behälter eines Schreibers für flüssige Tinte

Country Status (3)

Country Link
EP (1) EP0405768A1 (de)
JP (1) JPH0338397A (de)
CA (1) CA2011485A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631875A2 (de) * 1993-06-30 1995-01-04 Hewlett-Packard Company Tintenstrahlschreiber mit hydrophober Barriere zur Tintenlecküberwachung
DE4416880A1 (de) * 1993-10-04 1995-07-27 Draegerwerk Ag Füllfederhalter mit einer Belüftung des Tintenvorratsbehälters
WO2000076782A1 (de) * 1999-06-10 2000-12-21 Dataprint R. Kaufmann Gmbh Gerät, insbesondere schreibgerät
US6322268B1 (en) 1993-11-12 2001-11-27 Avery Dennison Corporation Efficient fluid dispensing utensil
US6413001B1 (en) 1995-08-14 2002-07-02 Dataprint R. Kaufmann Gmbh Liquid applicator implement
US6416242B1 (en) 1993-11-12 2002-07-09 Dataprint R. Kaufmann Gmbh Efficient fluid dispensing utensil
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3815921A1 (de) * 2019-10-29 2021-05-05 Société BIC Schreibspitze für einen schreibfilzstift

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232439C (de) *
FR60745E (fr) * 1950-07-04 1955-01-25 Perfectionnements aux stylographes à bille
CH329410A (fr) * 1956-07-12 1958-04-30 Caran D Ache Crayons Stylo à réservoir
FR2528361A1 (fr) * 1982-03-16 1983-12-16 Parker Pen Co Instrument d'ecriture et son procede de fabrication
US4588319A (en) * 1984-10-25 1986-05-13 Nicolet Instrument Corporation Marking instrument
EP0210469A2 (de) * 1985-08-02 1987-02-04 Montblanc-Simplo GmbH Tintenschreiber
EP0243922A1 (de) * 1986-04-28 1987-11-04 W.L. Gore & Associates GmbH Tintenpatrone mit Belüftungskörper

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232439C (de) *
FR60745E (fr) * 1950-07-04 1955-01-25 Perfectionnements aux stylographes à bille
CH329410A (fr) * 1956-07-12 1958-04-30 Caran D Ache Crayons Stylo à réservoir
FR2528361A1 (fr) * 1982-03-16 1983-12-16 Parker Pen Co Instrument d'ecriture et son procede de fabrication
US4588319A (en) * 1984-10-25 1986-05-13 Nicolet Instrument Corporation Marking instrument
EP0210469A2 (de) * 1985-08-02 1987-02-04 Montblanc-Simplo GmbH Tintenschreiber
EP0243922A1 (de) * 1986-04-28 1987-11-04 W.L. Gore & Associates GmbH Tintenpatrone mit Belüftungskörper

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0631875A2 (de) * 1993-06-30 1995-01-04 Hewlett-Packard Company Tintenstrahlschreiber mit hydrophober Barriere zur Tintenlecküberwachung
EP0631875A3 (de) * 1993-06-30 1995-03-08 Hewlett Packard Co Tintenstrahlschreiber mit hydrophober Barriere zur Tintenlecküberwachung.
DE4416880A1 (de) * 1993-10-04 1995-07-27 Draegerwerk Ag Füllfederhalter mit einer Belüftung des Tintenvorratsbehälters
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
US6413001B1 (en) 1995-08-14 2002-07-02 Dataprint R. Kaufmann Gmbh Liquid applicator implement
US6497527B2 (en) 1995-08-14 2002-12-24 Dataprint R. Kaufmann Gmbh Liquid applicator implement
WO2000076782A1 (de) * 1999-06-10 2000-12-21 Dataprint R. Kaufmann Gmbh Gerät, insbesondere schreibgerät
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

Also Published As

Publication number Publication date
CA2011485A1 (en) 1990-12-29
JPH0338397A (ja) 1991-02-19

Similar Documents

Publication Publication Date Title
US4588319A (en) Marking instrument
US3951555A (en) Modular writing pen
EP0493058B1 (de) Verfahren und Gerät für die Tintenversorgung eines Tintenstrahldruckers
EP0110499B1 (de) Tintenreservoir mit negativem Gegendruck
KR101126887B1 (ko) 유체를 수용하는 저장 용기, 밀봉재 및 잉크 펜 조립체
US6457819B2 (en) Vent for an ink-jet print cartridge
US6186620B1 (en) Ink pressure control apparatus for ink-jet pens
US6416242B1 (en) Efficient fluid dispensing utensil
EP0240994B1 (de) Gerät, zum Beispiel Schreibstift, zum Aufbringen von Flüssigkeit
EP0405768A1 (de) Hydrophobe Lüftungsvorrichtung für einen Behälter eines Schreibers für flüssige Tinte
US5651627A (en) Nib conversion unit
US20030038866A1 (en) Method of regulating pressure of ink cartridge and the pressure regulating device thereof
US3397939A (en) Marking instrument
EP0791464B1 (de) Tintenzufuhrvorrichtung und Aufzeichnungsgerät
US5745138A (en) Ink chamber with pressure relief chamber having pressure relief aperture and microparticles to exert capilliary action on ink
CA2042520A1 (en) Device for depositing a writing, drawing, printing or marking fluid on a background
US4643605A (en) Device for preventing drying of nib of cartridge type pen
EP1437224A1 (de) Verfahren zur Druckregelung einer Tintenpatrone und Vorrichtung zur Druckregelung
US5735624A (en) Relating to writing instruments
US20020057940A1 (en) Apparatus, in particular writing instrument
US6629798B1 (en) Pen
US3901608A (en) Writing instrument
US3522607A (en) Constant level inking system
US4937594A (en) Large volume pen
EP0340046B1 (de) Behälter für Flüssigkeiten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19910227

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19920127