US3459486A - Writing utensil - Google Patents

Writing utensil Download PDF

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Publication number
US3459486A
US3459486A US658113A US3459486DA US3459486A US 3459486 A US3459486 A US 3459486A US 658113 A US658113 A US 658113A US 3459486D A US3459486D A US 3459486DA US 3459486 A US3459486 A US 3459486A
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US
United States
Prior art keywords
chamber
writing
ink
utensil
shell
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
US658113A
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English (en)
Inventor
Franz Matschkal
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.)
JS Staedtler KG
Original Assignee
JS Staedtler 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 JS Staedtler KG filed Critical JS Staedtler KG
Application granted granted Critical
Publication of US3459486A publication Critical patent/US3459486A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B43K5/18—Arrangements for feeding the ink to the nibs
    • B43K5/1818—Mechanical feeding means, e.g. valves; Pumps
    • B43K5/1827—Valves
    • B43K5/1836—Valves automatically closing
    • B43K5/1845—Valves automatically closing opened by actuation of the writing point
    • 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
    • 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

  • the invention relates to a writing utensil for use with a liquid writing fluid such as ink, India ink, tints, etc. and more particularly, to a fountain pen of the kind in which an air duct within the shell of the utensil connects the ink storage chamber of the utensil with the writing assembly thereof and in which the ink is supplied from the storage chamber to the writing assembly by a feed duct.
  • the ink in the air duct when dry impedes or even blocks the flow of air into and out of the ink chamber thus preventing pressure compensation therein and as a result, the utensil is no longer in condition for immediate use.
  • a more specific object of the invention is to provide a novel and improved writing utensil of the general kind above referred to in which a normal pressure is continuously maintained in the ink storage chamber by means of a pressure compensating chamber which communicates Patented Aug. 5, 1969 ice with the air duct and also with the feed duct of the utensil.
  • the pressure compensating chamber is formed by a sleeve surrounding the feed duct spaced apart therefrom.
  • the feed duct has in its wall an aperture leading into the compensating chamber and the sleeve has an aperture communicating with the air duct.
  • the aperture between the feed duct and the pressure compensating chamber is preferably provided near the end of the feed duct adjacent to the writing assembly of the utensil and the aperture leadin g from the chamber into the air duct is preferably provided near the other end of the chamber.
  • the air duct may be formed, at least in part, by a lengthwise groove in the outer wall of the sleeve.
  • the invention further provides that the end walls of the sleeve are used as holders for the feed duct which is preferably in the form of a tube extending through said end walls.
  • the sleeve itself is held in the shell by means of a partition wall thereof.
  • the aperture leading from the compensating chamber into the air duct is preferably fitted with a liquid impervious but air permeable plug, for instance, a porous plug made of metal or plastic and saturated with silicon oil.
  • the invention further contemplates to provide within the compensating chamber a spiral winding encompassing the feed duct extending through the chamber. Such spiral winding serves to assure a smooth air flow within the compensating chamber.
  • FIG. 1 is a lengthwise sectional view of the front portion of a Writing utensil according to the invention
  • FIG. 2 is a section taken on line IIII of FIG. 1;
  • FIG. 3 is a section taken on line III-III of FIG. 1;
  • FIG. 4 is a section taken on line IV-IV of FIG. 1;
  • FIG. 5 is a section taken on line VV of FIG. 1.
  • the shell of the utensil is a two-part shell only the front portion 1 of which is shown.
  • the front portion should be visualized as being screwable upon the rear portion by means of the indicated threads.
  • the shell portion 1 mounts in its front and the writing assembly proper which should be visualized as being generally conventional. It comprises a holder 2 in which is mounted a writing sleeve 3 which constitutes the writing point proper.
  • a valve member or plunger 4 is slidable in holder 2 so as to close the holder at 5 by gravity when the utensil is held with the writing assembly facing downwardly.
  • a pin 4a on plunger 4 extends through sleeve 3 protruding therefrom.
  • An air channel between holder 2 and shell portion 1 is formed by lengthwise grooves 6 and ring grooves 7 formed in threads 8 by means of which the writing assembly and more specifically, the holder thereof is secured in shell portion 1.
  • the air duct is continued by annular spaces 25 and 26 and a groove 18 formed in the outer wall of a sleeve 13 as will also be more fully described hereinafter. As is evident, a continuous air duct leading to the forward end of shell portion 1 is thus formed so that the chamber is in communication with the atmosphere.
  • Holder 2 mounts a bushing 9 through which is extended a guide pin 10 secured to valve member 4.
  • Pin 10 serves guide the plunger when sliding in holder 2 and may be long enough to reach into ink chamber 12.
  • a tube 16 communicates on one end with chamber 12 and on the other end with the gap controlled at 5 by plunger 4. As can clearly be seen in FIG. 1, there is a continuing passage for the flow of ink from chamber 12 into sleeve 3 via feed tube 16 when plunger 4 is in the position opening the gap at 5.
  • the pressure compensating chamber according to the invention is formed by the annular chamber 14 defined by feed tube 16 and sleeve 13 encompassing the tube spaced apart therefrom.
  • An apertured end wall of sleeve 13 is used to mount the forward end of tube 16.
  • the other end of the tube is secured by a Wall member 17 which also consttutes the forward end Wall of chamber 12, the other end wall being formed by the base of the rear portion of the shell (not shown).
  • Chamber 14 is defined by tube 16 and sleeve 13 communicates with the aforementioned groove 18 in the outside wall of sleeve 13 through an aperture or port 19 thus connecting the compensating chamber with the atmosphere.
  • a second port or aperture 20 connects the compensating chamber with feed tube 16.
  • the aperture 19 is preferably provided at the rear end of sleeve 13 and the aperture 20 at the forward end of tube 16.
  • a liquid impervious but air permeable plug 21 is fitted in port 20.
  • Such plug may be made of porous metal or plastic and is saturated with a suitable liquid such as silicon oil.
  • the plug may be omitted with certain types of writing utensils even if India ink is to be used as writing medium.
  • a spiral winding as is indicated at 22 may be used. This winding is fitted into compensating chamber 14 encompassing tube 16 therein. Tests have shown that such spiral winding assures a satisfactory air flow.
  • the arrangement of the invention effectively prevents the ingress of ink into the forward grooves 6 and 7 of the air duct.
  • the air contained in compensating chamber 14 can escape through aperture 19 when ink flows into chamber 14 through aperture 20 in response to an elevated pressure in ink chamber 12, aperture 19 being always in direct communication with the atmosphere but blocked by plug 21 for the outflow of ink.
  • feed tube 16 can be used to form an air channel 23 and a feed channel 24.
  • air channel 23 has the smaller cross-sectional area.
  • a fountain pen comprising in combination:
  • a shell including in its rear end a storage chamber for writing liquid
  • an air duct of non-capillary dimension extending within the shell and connected at one end to the atmosphere at a point near said upper end of the shell;
  • said compensating means including a tubular member closed at both ends by end walls and encompassing said feed duct radially spaced therefrom to define an annular elongate compensating chamber between the tubular member and the feed duct, said feed duct having at its end adjacent to the writing assembly a first port communicating with the compensating chamber and said tubular member having at its end adjacent to said storage chamber a second port communicating with the other end of said air duct; and
  • a liquid impervious but air permeable plug closing said second port, said plug permitting passage of air into and out of said compensating chamber but blocking egress of writing liquid from said chamber.
  • a fountain pen according to claim 1 wherein said tubular member has in the outside of its wall a lengthwise groove, said groove constituting a part of said air duct.
  • a fountain pen according to claim 1 wherein said feed duct comprises a tube leading from the storage chamber to the writing assembly, and wherein a spiral winding within said compensating chamber encompasses the feed tube.
  • a fountain pen according to claim 1 wherein said feed duct comprises a tube leading from the storage chamber to the writing assembly, said feed tube extending through the end walls of the tubular member with a tight seal.
  • a fountain pen according to claim 5 wherein a partition divides said shell into two compartments, one including said writing assembly and the other said storage chamber, said feed tube extending through said partition wall and said tubular member abutting on one end against said partition wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
US658113A 1966-08-05 1967-08-03 Writing utensil Expired - Lifetime US3459486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST025722 1966-08-05

Publications (1)

Publication Number Publication Date
US3459486A true US3459486A (en) 1969-08-05

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ID=7460677

Family Applications (1)

Application Number Title Priority Date Filing Date
US658113A Expired - Lifetime US3459486A (en) 1966-08-05 1967-08-03 Writing utensil

Country Status (4)

Country Link
US (1) US3459486A (en, 2012)
JP (1) JPS4832703B1 (en, 2012)
FR (1) FR1556985A (en, 2012)
GB (1) GB1191674A (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734633A (en) * 1970-03-05 1973-05-22 Koh I Noor Rapidograph Tubular writing point especially for automatic drafting machines
US3901608A (en) * 1972-01-27 1975-08-26 Phillip Phillips Writing instrument
US3938899A (en) * 1974-05-08 1976-02-17 Otto Mutschler Stylograph
WO1980002260A1 (en) * 1979-04-25 1980-10-30 Arai M Drafting pen
US4522525A (en) * 1982-08-03 1985-06-11 Pentel Kabushiki Kaisha Writing instrument having a needle slidably mounted in a tubular tip
US4753546A (en) * 1978-02-14 1988-06-28 Koh-I-Noor Rapidograph, Inc. Pressure balanced stylographic pen
US5172995A (en) * 1990-04-27 1992-12-22 Koh-I-Noor Inc. Plotter pen with coaxial reservoir
FR2816884A1 (fr) * 2000-11-17 2002-05-24 Schmidt Feintechnik Gmbh Dispositif d'ecriture et de dosage
US20100272494A1 (en) * 2009-04-24 2010-10-28 Kokai Kenji Stick-shaped material extruding container and cosmetics

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208792B1 (en, 2012) * 1972-12-01 1976-06-04 Graphoplex Sa
JPS49117124U (en, 2012) * 1973-02-07 1974-10-07
JPS5225905A (en) * 1975-08-25 1977-02-26 Kawasaki Heavy Ind Ltd Turbine vane
JPS5232601U (en, 2012) * 1975-08-28 1977-03-08
DE2757554C3 (de) * 1977-12-23 1985-07-11 Fa. J.S. Staedtler, 8500 Nürnberg Schreibeinsatz für Röhrchenschreibgeräte
FR2449539A1 (fr) * 1979-02-26 1980-09-19 Gerance Ets Angalis Stylo a encre de chine a pointe tubulaire
CA1209093A (en) * 1982-03-16 1986-08-05 Thomas D. Hall Writing instruments and their manufacture
FR2546823B1 (fr) * 1983-06-03 1989-02-17 Pilot Pen Co Ltd Noyau a plume pour un instrument d'ecriture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2401167A (en) * 1940-03-12 1946-05-28 Kovacs Theodor Fountain pen
FR950633A (fr) * 1947-07-28 1949-10-03 Perfectionnements aux stylographes
US2766728A (en) * 1950-07-15 1956-10-16 Kovacs Theodor Fountain pen
US2766729A (en) * 1951-07-10 1956-10-16 Kovacs Theodor Fountain pen
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 (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2401167A (en) * 1940-03-12 1946-05-28 Kovacs Theodor Fountain pen
FR950633A (fr) * 1947-07-28 1949-10-03 Perfectionnements aux stylographes
US2766728A (en) * 1950-07-15 1956-10-16 Kovacs Theodor Fountain pen
US2766729A (en) * 1951-07-10 1956-10-16 Kovacs Theodor Fountain pen
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 (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734633A (en) * 1970-03-05 1973-05-22 Koh I Noor Rapidograph Tubular writing point especially for automatic drafting machines
US3901608A (en) * 1972-01-27 1975-08-26 Phillip Phillips Writing instrument
US3938899A (en) * 1974-05-08 1976-02-17 Otto Mutschler Stylograph
US4753546A (en) * 1978-02-14 1988-06-28 Koh-I-Noor Rapidograph, Inc. Pressure balanced stylographic pen
WO1980002260A1 (en) * 1979-04-25 1980-10-30 Arai M Drafting pen
US4522525A (en) * 1982-08-03 1985-06-11 Pentel Kabushiki Kaisha Writing instrument having a needle slidably mounted in a tubular tip
US5172995A (en) * 1990-04-27 1992-12-22 Koh-I-Noor Inc. Plotter pen with coaxial reservoir
FR2816884A1 (fr) * 2000-11-17 2002-05-24 Schmidt Feintechnik Gmbh Dispositif d'ecriture et de dosage
US20100272494A1 (en) * 2009-04-24 2010-10-28 Kokai Kenji Stick-shaped material extruding container and cosmetics
US7938591B2 (en) * 2009-04-24 2011-05-10 Tokiwa Corporation Stick-shaped material extruding container and cosmetics

Also Published As

Publication number Publication date
DE1511390A1 (de) 1969-07-31
JPS4832703B1 (en, 2012) 1973-10-08
GB1191674A (en) 1970-05-13
FR1556985A (en, 2012) 1969-02-14

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