US3737242A - Tube writing pen - Google Patents

Tube writing pen Download PDF

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Publication number
US3737242A
US3737242A US00162900A US3737242DA US3737242A US 3737242 A US3737242 A US 3737242A US 00162900 A US00162900 A US 00162900A US 3737242D A US3737242D A US 3737242DA US 3737242 A US3737242 A US 3737242A
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US
United States
Prior art keywords
tube
writing
pen
cartridge
ink
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Expired - Lifetime
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US00162900A
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English (en)
Inventor
M Hesebeck
H Suring
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Individual
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Individual
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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
    • B43K8/16—Pens with writing-points other than nibs or balls with tubular writing-points comprising a movable cleaning element
    • B43K8/18—Arrangements for feeding the ink to the 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
    • B43K8/16—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

  • ABSTRACT A stylographic or tube writing pen wherein the wall of the ink reservoir consists, at least in part, of a thin and [30] Forelgn Apphcahon Prionty Data flexible material which is capable of yielding to July 17, 1970 Germany ..P 20 35 526.4 changes in pressure and serving to adapt the available capacity of the ink reservoir to the volume of ink con- [52] US.
  • This invention relates to a stylographic or tube writing pen of the kind comprising a writing point formed with a bore containing a drop weight, and a writing tube into which a hair wire attached to one end of the drop weight projects, and a reservoir for ink communicating with the bore at the end of the writing point remote from the writing tube.
  • the purpose of the drop weight and of the attached hair wire is to regulate the flow of ink and to keep the writing tube clean of any deposits that form when the ink dries, by virtue of the axial movement of the drop weight and hair wire.
  • the ink reservoir in such pens is formed either by the barrel of the pen which carries the writing point, or, in the great majority of cases, by a cartridge which is mounted on the writing point in a manner forming a tight joint.
  • the cartridge consists of relatively rigid material, preferably a synthetic plastic, and it can be pulled off the writing point when it is to be refilled with ink.
  • the ink reservoir In order to permit ink to flow out of such an ink reservoir through the writing tube on to the writing surface, the ink reservoir must communicate with the ambient atmosphere, since otherwise the discharge of ink through the writing tube would generate a vacuum pressure and the further discharge of ink would cease.
  • a venting and equalizing chamber is therefore provided which may have the form of a helical slot.
  • the air present in the ink reservoir as well as the ink can expand into this equalization chamber when the ambient pressure changes or when the reservoir becomes warm.
  • a tube writing pen of the kind hereinbefore set forth wherein that part of the writing point which contains the writing tube and that part which is connected to this ink reservoir are integrally fromed without a venting and equalizing channel, and wherein the wall of the ink reservoir at least partly consists of a thin and flexible material that is capable of yielding to changes in pres sure and adapting the available capacity of the ink reservoir to the volume of the ink it contains.
  • the ink cannot therefore dry out anywhere except in the writing tube, and, in particular, only at the end of the writing tube, where there is direct contact with the ambient air.
  • the dired ink can, however, be easily removed by gentle shaking and moving the hair wire to and fro, and the pen will function even after having been kept for a long time without its protective cap, or at least its functionability can be immediately and earily restored.
  • the present tube writing pen also provides the advantage that the writing point need not be of divided construction as was hitherto necessary, and that the expensive moulding process for the creation of the venting and equalization chamber and of the associated fixing threads is not required.
  • the thin and flexible material may, for instance, be of a film of plastics material.
  • FIG. 1 is a fragmentary, partly sectional view of a tube writing pen in accordance with the invention.
  • FIG. 2 shows on an enlarged scale, a closure for an ink reservoir of the pen shown in FIG. 1;
  • FIG. 3 is a fragmentary view of a different embodiment of an ink reservoir for a tube writing pen
  • FIG. 4 is a fragmentary section of another embodiment of an ink reservoir for a tube writing pen
  • FIG. 5 shows another embodiment of the closure of a cartridge type ink reservoir
  • FIG. 6 shows yet another embodiment of a closure of a cartridge type reservoir
  • FIG. 7 shows a modified form of construction of a closure for a cartridge type reservoir.
  • FIGS. 1 and 2 of the drawings there is shown a tube writing pen having a writing point I screwed by means of screw threads 18 into a barrel 10, a ring 17 bearing a color code being interposed between the writing point and the barrel.
  • the bore 3 of the writing point contains a drop weight 2 to the bottom end of which there is affixed a hair wire 5 which projects into a writing tube 4 affixed to the bottom part of the writing point 1.
  • a hoop 8 appropriately anchored, prevents the drop weight from falling out when the pen is inverted.
  • the bottom part of the writing point carries a ring 19 for indicating the thickness of the trace, for instance by its color.
  • a cylindrical extension of the rear end of the writing point 1 is adapted to receive, in a tightly sealing fit, a body 20 resembling a cartridge which forms a reservoir 6 for ink.
  • the top and bottom ends of a tube 7 of a thin and extremely flexible material are atached to the inside wall of this cartridge.
  • the tube can yield to the slightest changes in pressure and, by varying its internal capacity and hence that of the reservoir proper, it can adapt itself to the volime of ink and of any air that may In order to ensure that the pressure in the interior of the tube 7, i.e.
  • the wall of the body 20 of the cartridge contains an opening 9 providing communication with the outside atmosphere through orifices in the barrel, not shown in the drawing.
  • the capacity of the ink reservoir will always so adjust itself that the internal pressure is equal to the ambient atmospheric pressure. It is therefore impossible for a superatmospheric pressure to build up in the ink reservoir that would force ink out of the writing tube 4, and it is also impossible for a subatmospheric pressure to be formed inside the ink reservoir to prevent ink from issuing from the writing tube 4 and thus stopping the pen from producing a trace.
  • the writing point shown in FIG. 1 is not composed of two parts, as is conventional, and that, in particular, a venting and equalization channel is absent, such as had to be provided in hitherto conventional tube writing pens with considerable effort and at great expense.
  • FIG. 2 At the upper end of the body 20 of the cartridge there is a closure which is illustrated in detail in FIG. 2.
  • This closure consists of a plug 11 which may be cylindrical. At its bottom and upper edges the plug is formed with outwardly projecting shoulders or flanges and 14 respectively. The plug 11 is retained by an inwardly projecting shoulder 13 formed in the upper end of the body of the cartridge, so that the plug has limited freedom of movement in the axial direction.
  • the plug is formed with an opening 16 which can be closed by a stopper 12, and the upper edge of the tube 7 is tightly attached to the shoulder 15, by, for example, being fused or adhesively bonded thereto.
  • FIGS. 1 and 2 show an ink reservoir comprising a cartridge inside which a tube of extremely thin and flexible material is fixed.
  • the ink reservoir may consist of a simple tube of very thin ad flexible material which is sealingly attached to the upper end of the writing point, the upper end of the tube being closed, for example by being tied, stuck or fused together.
  • a reservoir is delicate. and liable to be damaged by external effects, it complies with the requirements of the present invention since it will adapt the available capacity of the ink reservoir to the volume of the ink that is present by yielding to any slight change in pressure.
  • the thin and flexible material have the form of a tube. It is sufficient for only part of the ink reservoir to consist of such a thin and flexibily yielding material which will adapt the capacity of the ink reservoir to any possible volume of ink, to permit the pressure inside the reservoir to be kept equal to the pressure of the ambient atmosphere.
  • the ink reservoir might consist of a relatively rigid cartridge body, part of the wall of which is replaced by a thin flexible and yielding material. Such a reservoir is shown in FIG. 4, where part of the wall of a relatively rigid cartridge body 20 is replaced by a thin flexible foil of which one end 21 is connected in a manner forming a tight sealing joint to the inside wall of the cartridge body 20', as by an adhesive or by welding.
  • the wall of the cartridge body may be cut away in the region of this thin and flexibly yielding material.
  • FIG. 5 shows another embodiment of a closure for sealing the ink reservoir of the tube writing pen shown in FIG. 1.
  • a preferably cylindrical plug 11 Inserted into the body 20 of the cartridge which has an inwardly projecting shoulder 13 at its upper end, is a preferably cylindrical plug 11 which has an upper shoulder 14' and a lower shoulder 15' enabling the plug to be axially displaced within limits inside the cartridge.
  • Inside the opening 16' in the plug 11 are two inwardly projecting elastic aprons 23 and 24 which at their bottom ends are elastically kept in contact. These aprons in their normal positions of rest thus seal'the ink reservoir from the exterior and their sealingeffect will usually be further improved by the fact that ink tends to lodge between the aprons, become dry and act as a sealing mass.
  • a suitably shaped mouthpiece on a vessel for keeping the ink is inserted between the two aprons 23 and 24 'to force them apart and to'allow the ink to flow into the reservoir.
  • the aprons 23 and 24 may be integrally formed projecting from the upper face of the plug 11 and then subsequently tucked intothe opening 16', since this will produce a satisfactory elastic spring effect.
  • the upper edge of the tube 7 of thin and flexibly yielding material is not attached to the bottom shoulder but at least partly to the bottom ends of the two aprons 23 and 24, to which it may be adhesively bonded or fused. It will be readily seen that this will permit the tube 7, when the pen is held in its writing position, i.e., substantially upright, to collapse more easily as the volume of ink becomes less. This method of fixing the tube 7 therefore provides a better adaptation of the tube to the volume of its contents and hence a better equalization of pressures.
  • FIG. 6 shows yet another embodiment of a closure for the ink reservoir of a tube writing pen.
  • an inwardly projecting shoulder 13 for retaining a plug 11" so that it is axially slidable, the plug having an upper shoulder 14" and lower shoulder 15".
  • Affixed to the lower shoulder 15" is the upper end of a tube 7 of a thin and flexibly yielding material.
  • the plug is formed with an opening 16", which is preferably conical or frustoconical, and formed on one edge of this opening is a lip which elastically presses against the other edge of the opening 16" and thus closes the opening. Again the sealing effect is improved by the presence of a deposit of dried ink.
  • a suitably shaped mouthpiece on a vessel containing ink, such as a bottle is forced against the lip 25, causing the latter to uncover the opening 16" and to give entry of the ink into the reservoir.
  • the lip 25 may be produced by injection molding or by casting it together with the plug 11" in such manner that it forms a projecting extension into the opening 16", and by then pushing it out of the opening .16" downwards so that it will naturally tend to remain in spring elastic contact with the opposite edge of the opening.
  • the cartridge 20 is closed at the top by a transverse wall 26 containing an opening 29 radially offset from the axial center line of the cartridge.
  • This end of the cartridge carries a closure element 27 which by threads 28 or some other means, such as shoulders and corresponding undercut recesses, is rotatably mounted is such manner that an opening in this closure element can be brought into register with the opening 29 by rotating the closure element out of the position shown in FIG. 7.
  • the cartridge can then be filled with ink and reclosed by appropriately rotating the closure element 27.
  • the cartridge 20" contains a tube 7 made of a thin and flexibly yielding material of which the upper and bottom ends are each attached to the inside wall of the cartridge 20 in a manner forming tight sealing
  • the body of the cartridge and the associated closure or closure elements may be conventional manner be made of a synthetic plastics, and the thin flexibly yielding material which adapts the capacity of the reservoir to the volume of the ink is preferably a film of transparent plastics material.
  • a tube writing pen comprising:
  • said writing point part including said writing tube, and that portion attached to said ink reservoir being integrally formed and in the absence of a venting and equalizing channel;
  • said reservoir being a cartridge attachable to said writing point and including:
  • a tube of thin and flexible material in said body having the ends thereof attached to the inside wall of said body in a manner forming tight joints, said flexible material being capable of yielding to changes in pressure and adapting the available capacity of the ink reservoir to the volume of ink contained therein, the space between the flexible material and the inner wall communicating with the ambient atmosphere through a hole in said body.
  • a tube writing pen as claimed in claim 1 wherein the cartridge is attachable by a sealing joint to the writing point, and wherein the end of the cartridge remote from the writing tube contains a closure which permits access to the ink reservoir from the outside.
  • a tube writing pen as claimed in claim 2 wherein the cartridge is closed at its end remote from the writing tube by a transverse wall formed with an opening radially offset from the axial center line of the cartridge, and wherein a cap-shaped closure member containing an opening offset by the same radial distance from the axial center line of the cartridge is rotatably mounted on the cartridge to cover said transverse wall.
  • a tube writing pen as claimed in claim 1 a por- 7 tion of said cartridge body being cut away and said flexible tube being at least partly enclosed in the cut away form of strips. cm 14.
  • a tube writing pen as claimed in claim 12; is in the formof a screen. wherein the relatively rigid enclosing material is in the

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US00162900A 1970-07-17 1971-07-15 Tube writing pen Expired - Lifetime US3737242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702035526 DE2035526A1 (de) 1970-07-17 1970-07-17 Rohrchenschreiber

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US3737242A true US3737242A (en) 1973-06-05

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US00162900A Expired - Lifetime US3737242A (en) 1970-07-17 1971-07-15 Tube writing pen

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US (1) US3737242A (enrdf_load_stackoverflow)
DE (1) DE2035526A1 (enrdf_load_stackoverflow)
FR (1) FR2103066A5 (enrdf_load_stackoverflow)
GB (1) GB1289425A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217058A (en) * 1978-02-03 1980-08-12 Koh-I-Noor Rapidograph, Inc. Reservoir cartridge for writing pens
US4470715A (en) * 1979-10-26 1984-09-11 Reuchlin Johan George Dispenser/applicator for nail polish and the like
US4572691A (en) * 1984-07-02 1986-02-25 Minnesota Mining And Manufacturing Company Pen-like instrument for applying correction fluid
US5443322A (en) * 1993-04-19 1995-08-22 Rotring International Gmbh & Co. Kg Flow control for writing or drawing instrument
US20040131415A1 (en) * 2001-06-29 2004-07-08 Kazuhiko Furukawa Writing material and ink absorber production method
US20060248738A1 (en) * 2005-05-04 2006-11-09 Stanley Tools And Hardware Level

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313669C1 (de) * 1993-04-22 1994-05-05 Rotring Int Gmbh Schreib- oder Zeichengerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379603A (en) * 1920-06-26 1921-05-31 Gordon Pen Company Stylographic pen
US3153401A (en) * 1962-05-10 1964-10-20 Sheaffer W A Pen Co Writing instrument
US3233594A (en) * 1964-04-24 1966-02-08 Sheaffer W A Pen Co Fluid container
US3482358A (en) * 1967-09-27 1969-12-09 Clifford Eugene Mooney Belt sanders

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379603A (en) * 1920-06-26 1921-05-31 Gordon Pen Company Stylographic pen
US3153401A (en) * 1962-05-10 1964-10-20 Sheaffer W A Pen Co Writing instrument
US3233594A (en) * 1964-04-24 1966-02-08 Sheaffer W A Pen Co Fluid container
US3482358A (en) * 1967-09-27 1969-12-09 Clifford Eugene Mooney Belt sanders

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217058A (en) * 1978-02-03 1980-08-12 Koh-I-Noor Rapidograph, Inc. Reservoir cartridge for writing pens
US4470715A (en) * 1979-10-26 1984-09-11 Reuchlin Johan George Dispenser/applicator for nail polish and the like
US4572691A (en) * 1984-07-02 1986-02-25 Minnesota Mining And Manufacturing Company Pen-like instrument for applying correction fluid
US5443322A (en) * 1993-04-19 1995-08-22 Rotring International Gmbh & Co. Kg Flow control for writing or drawing instrument
US20040131415A1 (en) * 2001-06-29 2004-07-08 Kazuhiko Furukawa Writing material and ink absorber production method
US7223037B2 (en) * 2001-06-29 2007-05-29 Mitsubishi Pencil Kabushiki Kaisha Production processes for writing instrument and ink occlusion body
US20060248738A1 (en) * 2005-05-04 2006-11-09 Stanley Tools And Hardware Level
US7204029B2 (en) 2005-05-04 2007-04-17 The Stanley Works Level
US7316074B2 (en) 2005-05-04 2008-01-08 The Stanley Works Level

Also Published As

Publication number Publication date
FR2103066A5 (enrdf_load_stackoverflow) 1972-04-07
DE2035526A1 (de) 1972-01-20
GB1289425A (enrdf_load_stackoverflow) 1972-09-20

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