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US3424538A - Pen - Google Patents

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Publication number
US3424538A
US3424538A US578578A US57857866A US3424538A US 3424538 A US3424538 A US 3424538A US 578578 A US578578 A US 578578A US 57857866 A US57857866 A US 57857866A US 3424538 A US3424538 A US 3424538A
Authority
US
United States
Prior art keywords
ink
pen
reservoir
bore
barrel
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
US578578A
Other languages
English (en)
Inventor
Friedrich-Wilhelm Rausch
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.)
Gunther Wagner Pelikan Werke GmbH
Original Assignee
Gunther Wagner Pelikan Werke GmbH
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 Gunther Wagner Pelikan Werke GmbH filed Critical Gunther Wagner Pelikan Werke GmbH
Application granted granted Critical
Publication of US3424538A publication Critical patent/US3424538A/en
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
    • B43K8/16—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

Definitions

  • a pen includes a barrel having a central bore at its front end and rearwardly thereof a centrally arranged closed cylindrical chamber having a narrow opening at its front end coaxial with the bore.
  • An ink reservoir is located rearwardly of the cylindrical chamber.
  • a cleaning unit comprises a piston element slidably arranged in the cylindrical chamber and a pin secured to and extending forwardly of the piston element so that, when the latter is in advanced position the pin projects through the narrow opening and the bore into the central passage in the ink applicator.
  • the present invention relates to a pen and, more particularly, to a pen having a rellable ink reservoir.
  • Pens of the type having a refllable ink reservoir are generally known as fountain pens, a designation which will occasionally be employed hereafter. All pens of this type are provided with nibs of one type or another which contact the paper and make thereon the ink indicia. Some of the general-use fountain pens, and most fountain pens used for drafting, are provided with nibs in form of a short tubular portion through which ink can ow from the reservoir onto the paper or other material on which indicia are to be made. The problem with this latter type of nib is, however, that quantities of ink are likely to dry thereon, or indeed to dry in the passages connecting the tubular member with the ink reservoir.
  • a piston-like member is disposed in a chamber in the interior of the detachable ink applicator carried by the pen, and provided with a forwardly projecting pin which is located within the tubular nib of the applicator and can freely move therein in longitudinal direction in response to any movement of the pen from a horizontal to an inclined position, or vice versa.
  • a forwardly projecting pin which is located within the tubular nib of the applicator and can freely move therein in longitudinal direction in response to any movement of the pen from a horizontal to an inclined position, or vice versa.
  • the front portion including the ink applicator, comprises an auxiliary ink reservoir of relatively great volume which is connected with an ink feeding system.
  • the arrangement and configuration of the ink reservoir or reservoirs makes possible a relatively advantageous compensation for temperature fluctuations and thus relatively uniform ink ow.
  • the movable piston-like member with its pin is not provided since the space necessary for it is of course taken up by the auxiliary or overlflow reservoir.
  • the formation of encrustations within the tubular nib is inevitable and the pen must then be disassembled and cleaned. This is rather ditlicult because of the relative complexity of the ink feeding system connecting the nib with the overow reservoir.
  • a more specific object of the present invention is to provide such a pen in which the formation of encrustations in the nib is eliminated or at least largely prevented.
  • a concomitant object of the invention is to provide a pen of the type outlined above in which a uniform ink ow from the ink reservoir to the nib is assured.
  • a pen which comprises an elongated pen barrel provided at its front end with a central bore and rearwardly therefrom with a centrally arranged closed cylindrical chamber having a narrow opening at its front end arranged coaxially with said central bore.
  • An ink reservoir is provided in the barrel and is located rearwardly of the cylindrical chamber separated therefrom.
  • Passage means are provided in the barrel, including a portion which extends alongside of and is spaced from the cylindrical chamber and communicates at one end with the ink reservoir and at its other end with the bore at the front end of the barrel, an ink applicator is removably mounted on the front end of the barrel Iand is provided with a central passage arranged coaxially with the bore and the narrow opening, and a cleaning unit is provided, including a piston element slidably arranged within the cylindrical chamber and movable between a retracted position nearer to the ink reservoir and in an advanced position nearer to the narrow opening of the cylindrical chamber.
  • the cleaning unit further includes a pin which is secured at its rear end to the piston element and extends forwardly therefrom, such pin projecting in advanced position of the piston element through the narrow opening and the bore in the front end of the barrel into the central passage of the ink applicator.
  • the length of the path along which the piston-like member can move, as well as the length of the pin are so arranged that in the retracted position of the piston-like element the front end of the pin is located within the central bore in the front end of the barrel.
  • any movement of the pen from a horizontal to an inclined position and vice versa will cause shifting of the piston-like element and consequently of the pin into and out of the nib of the ink applicator, thereby cleaning this nib of ink deposits or encrustations.
  • the ink is in contact with the air only at the point :at which it leaves the front end of the nib, so that the formation of ink encrustations is further reduced by this expedient.
  • the invention provides for an auxiliary or overflow ink reservoir of relatively great volume which permits use of the pen under all atmospheric conditions ⁇ without any significant changes in the ink ow.
  • FIG. 1 is a partial cross-section in longitudinal direction through a pen in accordance with the present invention.
  • FIG. 2 is a section taken on the line II-II of FIG. l.
  • FIG. 1 it will -be seen that the front section 1 of the pen is provided with an internal shoulder 2 and is connected via screw threads 3 with a rear portion of the barrel, namely with an ink reservoir-containing portion 6.
  • An elastically compressible sealing ring 8 is advanta geously provided which is compressed between the por tions 1 and 6.
  • the front portion 1 houses an inner sleeve comprising a back portion 4 and a forward portion 5. Located within this inner sleeve is a guide sleeve 7.
  • the inner sleeve is provided with a radially projecting ange portion 9 which is received within the front portion 1 of the barrel and which is provided with an eccentrically located annular capillary groove 10 which at its narrowest point as seen with respect to the Ibore of front portion 1 is connected with the interior of the ink reservoir ⁇ 6 by a longitudinally extending groove 12 whereas at its widest, oppositely located point it is connected via a longitudinally extending groove 13 with an overflow reservoir 18.
  • the back portion 4 is provided at its forward end with a means for securing thereto the forward portion 5, for instance by pushing the front end of the portion 4 into the rearwardly directed opening of the forward portion 5.
  • the forward portion 5 is provided with two or more annular grooves 14 and 15 which are in communication with one another and which further communicate via an air chamber 16 with the ambient atmosphere and via an additional air channel 17 with the overflow reservoir 18. None of these channels are of capillary type.
  • the forward portion 5 is ⁇ also provided ⁇ with a radial shoulder 19 which engages the inwardly directed shoulder 2 at the front end of portion 1 against which it is pressed when the sealing ring 8 is placed -under axial compression, as has been indicated before.
  • Guide sleeve 7 is located within the portions 4 and 5 and extends over the entire length thereof in such a manner that an annular capillary passage 20 exists between the inner wall of the portions 4 and 5 on the one hand and the outer wall of the drive sleeve 7 on the other hand.
  • This passage 20 serves for conducting the ink.
  • the guide sleeve 7 is, as will be evident from the drawing, centered and supported, preferably at its conically tapering front end, by supporting projections 21 provided at the conically tapering bore of portion 5, and the depth of these projections 21 is such that a capillary passage is formed between the same and the sleeve 7.
  • the sleeve 7 is secured and centered by having an axial projection 22 provided on the back portion 4 extending into its central chamber 32.
  • this axial projection 22 simultaneously serves to close off the rear end of sleeve 7 and to thus define the aforementioned central chamber 32.
  • the cleaning unit comprising an axially slidable piston member 23 which carries at its front end a forwardly projecting pin 24, is slidable within this chamber 32.
  • the novel pin is tilted such that its forward end points in downward direction the piston member 23 moves to an advanced position in which the pin projects through the bore 25 of sleeve 7 into the bore 26, which is of greater cross-section than the bore 25 since through bore 26 ink must ow whereas it is desired that ink-flow through bore 25 be prevented, and into the tubular nib 27 of the ink applicator 28.
  • the total length of the pin 24 and the piston 23, as well as the extent of axial movement of the latter, are so arranged that in the retracted position of the piston 23 the front end of the pin 24 does not project beyond the bore 26 and is thus protected if the ink applicator 28 is exchanged or removed, whereas in advanced position of the piston 23 the pin extends completely through the nib 27 and slightly projects beyond the open front end thereof.
  • the outer wall of back portion 4 is not cylindrical but rather slightly conical in such manner that it tapers towards the front of the pen.
  • a particularly advantageous capillary action can be obtained in this area if the wall is of hyperbolic outline, which is not shown in the drawing.
  • annular space serving as overflow reservoir 18 of such configuration that automatic filling thereof with fluid from the reservoir 6 is not possible.
  • this overflow reservoir 18 fills uniformly and without the inclusion of any air from the rear end of reservoir 18 to the front end.
  • a capillary longitudinally extending groove 29 is provided at opposite sides of the longitudinally extending groove 12 parallel thereto.
  • the portion or end wall 22 closes off the chamber 32. It is carried by the back portion 4 and is preferably a separate member. It is provided with several longitudinally extending ribs 30 angularly spaced and of such height that several arcuate capillary passages 31 are established between the bore of the back portion 4 and the peripheral face of wall 22, and it is these capillary passages 31 which connect the annular capillary groove 20 with the ink reservoir 6.
  • the annular capillary groove 20 is of constant cross section since there is no shoulder at the joint between the bore of rear portion 4 and forward portion 5. The latter, as is evident from the drawing, carries the ink applicator 28 with the tubular nib 27 and is secured thereto, preferably by means of screw threads.
  • ink reservoir 5 is filled since this can be done in conventional form from an ink container or by means of cartridges.
  • a cap will of course be provided for protecting the front end of the pen and it should be noted that this can be placed onto the pen without requiring removal of the ink applicator 28.
  • the ink applicator 28 can, of course, be replaced With a different type of applicator if desired.
  • a pen comprising, in combination, an elongated pen barrel provided at its front end with a central bore and rearwardly therefrom with a centrally arranged closed cylindrical chamber having a narrow opening at its front end arranged coaxially with said central bore; an ink reservoir located in said barrel rearwardly of said cylindrical chamber and separated therefrom; wall means interposed between said ink reservoir and said cylindrical chamber and sealing the latter against entry of ink from the former; passage means in said barrel including a portion extending alongside of and spaced from said cylindrical chamber communicating at one end with said ink reservoir and at its other end with said bore at said front end of said barrel; an ink applicator removably mounted on the front end of said barrel and provided With a central passage arranged coaxially with said bore and said narrow opening; and a cleaning unit, including a piston element slidably arranged within said cylindrical chamber and movable between a retracted position nearer to said ink reservoir and an advanced position nearer to said narrow opening of said cylindrical chamber, said cleaning unit also including a pin secured at its
  • a pen as defined in clairn 1 wherein said pin is of such length that the front end thereof in retracted position of said piston element is located within said central bore in the front end of said barrel.
  • a pen as defined in claim 1 wherein said barrel comprises a rear section within which said ink reservoir is located, and a front section removably secured to said rear section and comprising said front portion.
  • said front section includes an outer sleeve member secured to said rear section and having an open front end, and an inner sleeve having a back portion received in said outer sleeve with peripheral clearance so as to define therewith an annular space and also having a forward portion connected to said back portion partially located within said outer sleeve and sealing said annular space and partially projecting outwardly beyond said open front end of said outer sleeve.
  • said inner sleeve further comprising a guide sleeve received within said forward and back portions of said inner sleeve and defining therewith said portion of said passage means, said piston element being located within said guide sleeve.
  • passage means is an annular capillary passage of constant crosssection.
  • passage means comprises a plurality of capillary channels communicating with said ink reservoir and with said portion of the passage means.

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  • Pens And Brushes (AREA)
US578578A 1965-09-16 1966-09-12 Pen Expired - Lifetime US3424538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0039925 1965-09-16

Publications (1)

Publication Number Publication Date
US3424538A true US3424538A (en) 1969-01-28

Family

ID=7602288

Family Applications (1)

Application Number Title Priority Date Filing Date
US578578A Expired - Lifetime US3424538A (en) 1965-09-16 1966-09-12 Pen

Country Status (6)

Country Link
US (1) US3424538A (de)
AT (1) AT279425B (de)
CH (1) CH450959A (de)
DE (1) DE1461673A1 (de)
GB (1) GB1166814A (de)
NL (1) NL6612331A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901608A (en) * 1972-01-27 1975-08-26 Phillip Phillips Writing instrument
US3938899A (en) * 1974-05-08 1976-02-17 Otto Mutschler Stylograph
WO1980000819A1 (en) * 1978-10-12 1980-05-01 Bok Edward Pen with an improved ink injection system
US4390299A (en) * 1980-10-02 1983-06-28 Otto Mutschler India ink drawing implement
WO1985004375A1 (en) * 1984-03-31 1985-10-10 Mazhar Shah Correction fluid and dispenser
FR2661369A1 (fr) * 1990-04-27 1991-10-31 Rotring Werke Riepe Kg Pointe a petit tube d'ecriture, notamment organe d'ecriture a tube pour utilisation dans des traceurs.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1611802C3 (de) * 1968-01-11 1979-06-28 Rotring-Werke Riepe Kg, 2000 Hamburg Fallgewicht mit Reinigungsdraht für Röhrchenschreiber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891512A (en) * 1955-05-25 1959-06-23 Kovacs Theodor Fountain pens
FR1244806A (fr) * 1959-01-09 1960-10-28 Stylographe avec buse pour écrire ou pour dessiner

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891512A (en) * 1955-05-25 1959-06-23 Kovacs Theodor Fountain pens
FR1244806A (fr) * 1959-01-09 1960-10-28 Stylographe avec buse pour écrire ou pour dessiner

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901608A (en) * 1972-01-27 1975-08-26 Phillip Phillips Writing instrument
US3938899A (en) * 1974-05-08 1976-02-17 Otto Mutschler Stylograph
WO1980000819A1 (en) * 1978-10-12 1980-05-01 Bok Edward Pen with an improved ink injection system
US4390299A (en) * 1980-10-02 1983-06-28 Otto Mutschler India ink drawing implement
WO1985004375A1 (en) * 1984-03-31 1985-10-10 Mazhar Shah Correction fluid and dispenser
FR2661369A1 (fr) * 1990-04-27 1991-10-31 Rotring Werke Riepe Kg Pointe a petit tube d'ecriture, notamment organe d'ecriture a tube pour utilisation dans des traceurs.

Also Published As

Publication number Publication date
CH450959A (de) 1968-05-15
GB1166814A (en) 1969-10-08
DE1461673A1 (de) 1969-07-24
AT279425B (de) 1970-03-10
NL6612331A (de) 1967-03-17

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