US2935969A - Fountain pen with overflow chamber situated in the front part of the fountain pen body - Google Patents

Fountain pen with overflow chamber situated in the front part of the fountain pen body Download PDF

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Publication number
US2935969A
US2935969A US578284A US57828456A US2935969A US 2935969 A US2935969 A US 2935969A US 578284 A US578284 A US 578284A US 57828456 A US57828456 A US 57828456A US 2935969 A US2935969 A US 2935969A
Authority
US
United States
Prior art keywords
fountain pen
sleeve
ink
space
spaces
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
US578284A
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English (en)
Inventor
Kovacs Theodor
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Individual
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Individual
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Publication date
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Publication of US2935969A publication Critical patent/US2935969A/en
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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
    • B43K5/18—Arrangements for feeding the ink to the nibs

Definitions

  • Fig. 1 is a longitudinal' section of theA front part'of the fountain pen in the'plane offsymmetry
  • Figs. 2, 3 and 4v are cross sectional views taken'along the corresponding lines II-II, III-III, and IV-IVof Fig. l ⁇ . y
  • 1 designates thefont part of the hollow fountain pen body, in the rearwardly closed'frear part of which (not shown)r isplocated the-inky reservoir.
  • the bore of the. fountain pen body is restricted at its front end 2.
  • a tubular body 3* having ahead 4 is inserted inthe fountain .pen body. from. the: front.l so thatf onlyr its head 4 projects outsideV said: body.
  • the shank portion 5 of the tubular body adjacent the head 4 is sealingly and ⁇ ixedly retained in the mouth of' the fountain pen body.
  • TheV outside diameter ofthe rear end portion 6 of the tubularl body is byr afew ten thousandths of an inch smaller tharrthatof the shank portion 5, so that the rear end portion 6-may readily" be inserted through the mouthof the fountain-penbocly.' .
  • the tubular body has an intermediatepertion; ofaredilced diameter extending ⁇ between the shank portion 5 and the end portion 6.
  • a short section 7 of the tubular body adjacent the end portion 6 has a diameter about .00S in. (0.2 mm.) smaller than that of the end portion 6.
  • the intermediate portion of the tubular body extending between the section 7 and the shank portion 5 is of a more reduced diameter and tapers from the section 7 towards the shank portion 5 following the shape of a hyperbola or of a hyperbolashaped curve.
  • the rear a sleeve 9 which with its rear end 10 is xedly retained in the bore of the fountain pen body.
  • the sleeve 9 with its front end embraces the shank portion 5 and is thereby centered at the front. Between its rear end portion 10 and its front end, the sleeve is of reduced outside diameter.
  • a short section 11 of the sleeve adjacent the rear end portion 10 has 2,935,969 Patented. May 10, 1960 2.
  • the part' of the sleeve extending from section 11 to theV front end thereof is of morer reduced diameter;
  • the sleeve tapers in" longitudinall cross sectiontowards the front following the form of a hyperbola or of' a hyperbola-like curve.
  • the section 7 of the tubular bo'dy 3 forms withinthe bore of sleeve 9 a space 12 of annular cross section which is s'o narrow that,A during writing, it retains the quantity ⁇ of inle previously received therein.
  • the capillary space formed within the bore of sleeve' 9 by the hyperboloid surface 8 of the tubular body 3 narrows in longitudinal cross section towardsthe ink reservoir, following the form of a hyperbola or of a hyperbola-like curve, and is so di'rnensionedA as tobe capable of receiving excess ink and giving it olf again.
  • the section 11 of sleeve 9 forms within thev bore of the fountain pen body a -space 14 correspondingtozthevnarrow space 12,*while'the hyperboloid surface 15 of sleeve 9 forms an outer space 16 corresponding tothe inner capillary space 13. Both spaces 13 and 16 constitute the overow chamber.
  • the tubular body 3v is provided withv a through ⁇ bore thev inner diameter of which is approximately .02 in. (0.5 mm.) greaterV within the head 4 than behind said head.
  • a pin.17l Insertedv from. the. front into the boreV of the tubular. body is a pin.17l having. a thickenedfrontr portion 18. which fits into the front. partoff the bore of the tubu-V lar. body andv is provided with. a recessadaptedv to receive the pen 19.'
  • the reduced rear portion of the pin has an outside diameter which is by about .004 in. (0I-l' mm.) smallerthan the diameter ofJ the surrounding.bore,.where by a narrow space 20-of annular cross section fadapte'd to conduct ink therethrough is formed aroundithe reduced rear portion of the pin.
  • tubular body 3 and the sleeve 9 are each provided withl sets lof three longitudinal grooves 25 o and 26. re.- spectively, equally spaced around their circumference.
  • One. of the longitudinal grooyes25 terminates at the front in the wide transverse bore 23,. while the longitudinal grooves 26 terminate in the. wide ⁇ transverse bores 24 of sleeve 9.
  • the longitudinalgrooves areof such width that they haveV a lower capillary potential than the capillary spaces 13; ⁇ 16, ⁇ whereby the surfaces '8 andf'1 ⁇ 5 ofthe respective bodies 3, 9 forming the capillary spaces 13, 16 are divided into longitudinal lands.
  • the rear end portion 6 of the tubular body 3 and the rear end portion of sleeve 9 are provided with respective narrow longitudinal slots 27, 28 which when wet will not allow the passage of air.
  • An air passage 29 about .02 in. (0.5 mm.) wide and increasing in depth towards the ink reservoir, is provided in the rear end portion of the sleeve in the central plane of slot 2S.
  • the longitudinal slots 25 of the tubular body terminate short of the section 7, while the longitudinal slots 26 terminate short of collar 30.
  • the Vspace 16 communicating with the ink reservoir' through air passage 29 narrows in cross section towards the pen side of the fountain pen, whilst the space 13 is of constant circumferential width.
  • the space 16 has a higher capillary. potential than thetspace'13, at least in its rear part.
  • an air evacuatng tube 32 Fixed in the rear end of the ink conductor pin 17 is an air evacuatng tube 32 the bore 33 of which communicates with the space 16 via a short axial bore 34 of the pin, aligned, radial bores 35, 36, 37, and air passage 29, and with the atmosphere via bores 24, 23, 22 and 21.
  • the fountain pen functions as follows: VThe fountain'pen is lled by drawing in ink in the usual manner.
  • the ink flows from the ink reservoir through the ink conduit 20 to the pen 19, while the replacement air normally passes through the vent passage 21, the overflow chamber, and the air passage 29, into the ink reservoir.
  • Any excess ink that may be present flows from the ink reservoir Va the longitudinal slots 27, 28, and the air passage 29, into the overflow chamber, in which it advances from the rear towards the front.
  • ink is drawn from the ink reservoir via the ink conduit 20, whereby a negative pressure is created in the reservoir which prevents the excess ink in the overflow chamber from flowing back into the reservoir. After the elimination of all excess ink, replacement air will normally enter the reservoir.
  • the longitudinally extending capillary spaces 13, 16 taper in longitudinal cross section towards the ink reservoir following the form of a hyperbola or of a hyperbola-like curve.
  • the capillary potential in said v spaces is irregular, being lower in the region corresponding approximately to the mediumheight of said spaces, than in the regions above and below thereof.
  • the outer space 1-6 communicating with the ink reservoir through air passage 29 possesses a higher capillary potential than the inner space 13, at least in its rear portion, so that the spaces will ll and empty in the desired sequence.
  • the complete filling and emptying of the spaces is further assisted by the fact that the outer space communicating with the reservoir through the air passage, narrows in transverse cross section towards the pen side of the fountain pen, whilst the inner space is of constant circumferential width.
  • the air passage 29 connecting the overflow chamber with the ink reservoir increases in depth towards the latter. Consequently, the replacement air will encounter the necessary resistance only in the narrower front part of the passage, and will periodically block the upper ⁇ part of the passage only for shortest periods of time, whereby the air passage may also act as an ink passage to the overow chamber.
  • vent passage 21 in the front portion of the ink conductor pin 17 narrows towards the rear in order to permit the ink contained in said vent passage from the filling operation may be used up without an increase in ow intensity.
  • Threads 21 provided in the wider front of the passage retain the ink and conduct it by increased capillary effect into the narrower rear part of the bore.
  • a fountain pen comprising a barrel formed with an ink reservoir in the rearportion thereof, at least one sleeve arranged within the front portion of said barrel, the surfaces of said sleeve and of said barrel defining therebetween at least one longitudinally extending capillary annular overow ink storage space, said space tapering from the front to the rear, said sleeve being formed with a plurality of continuous uninterrupted longitudinal grooves cut into the outer surface thereof and extending over a length intermediate and non-contiguous the end portions of said sleeve, said grooves having a lower capii? lary potential than said overflow ink storage space and said sleeve being otherwise uncompartmented in a transverse direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
US578284A 1955-04-18 1956-04-16 Fountain pen with overflow chamber situated in the front part of the fountain pen body Expired - Lifetime US2935969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK25539A DE1008605B (de) 1955-04-18 1955-04-18 Fuellfederhalter mit einer im vorderen Teil des Halterschaftes angeordneten UEberflusskammer

Publications (1)

Publication Number Publication Date
US2935969A true US2935969A (en) 1960-05-10

Family

ID=7217334

Family Applications (1)

Application Number Title Priority Date Filing Date
US578284A Expired - Lifetime US2935969A (en) 1955-04-18 1956-04-16 Fountain pen with overflow chamber situated in the front part of the fountain pen body

Country Status (5)

Country Link
US (1) US2935969A (fr)
CH (1) CH341736A (fr)
DE (1) DE1008605B (fr)
FR (1) FR1152674A (fr)
GB (1) GB795902A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134363A (en) * 1960-09-23 1964-05-26 Kovacs Theodor Fountain pen
US4382707A (en) * 1980-03-21 1983-05-10 Koh-I-Noor Rapidograph, Inc. Felt tip writing pen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1007424A (en) * 1960-12-07 1965-10-13 Parker Pen Co Fountain pens

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2410423A (en) * 1944-10-14 1946-11-05 Scripto Mfg Company Fountain pen
FR991812A (fr) * 1949-05-19 1951-10-10 Système régulateur d'alimentation pour porte-plumes réservoirs et similaires
AT176469B (de) * 1951-06-27 1953-10-26 Ct Pen Narodni Podnik Füllfeder
FR1058739A (fr) * 1951-07-10 1954-03-18 Porte-plume réservoir
GB713536A (en) * 1950-07-15 1954-08-11 Theodor Kovace Improvements relating to fountain pens
FR1071648A (fr) * 1952-02-13 1954-09-02 Stylomine Ets Dispositif de régulation de l'écoulement de l'encre dans les stylographes
FR61714E (fr) * 1951-05-28 1955-05-17 Système régulateur d'alimentation pour porte-plumes réservoirs et similaires
DK68984A (da) * 1983-02-16 1984-08-17 Blohm Voss Ag Skib med flere daek og langs daekkene forloebende langs- og tvaergaaende baereelementer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB620605A (en) * 1946-09-13 1949-03-28 Scripto Inc Improvements in and relating to fountain pens
CH288187A (de) * 1950-02-02 1953-01-15 Kovacs Theodor Tintenleiter an einem Füllfederhalter.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2410423A (en) * 1944-10-14 1946-11-05 Scripto Mfg Company Fountain pen
FR991812A (fr) * 1949-05-19 1951-10-10 Système régulateur d'alimentation pour porte-plumes réservoirs et similaires
GB713536A (en) * 1950-07-15 1954-08-11 Theodor Kovace Improvements relating to fountain pens
FR61714E (fr) * 1951-05-28 1955-05-17 Système régulateur d'alimentation pour porte-plumes réservoirs et similaires
AT176469B (de) * 1951-06-27 1953-10-26 Ct Pen Narodni Podnik Füllfeder
FR1058739A (fr) * 1951-07-10 1954-03-18 Porte-plume réservoir
FR1071648A (fr) * 1952-02-13 1954-09-02 Stylomine Ets Dispositif de régulation de l'écoulement de l'encre dans les stylographes
DK68984A (da) * 1983-02-16 1984-08-17 Blohm Voss Ag Skib med flere daek og langs daekkene forloebende langs- og tvaergaaende baereelementer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134363A (en) * 1960-09-23 1964-05-26 Kovacs Theodor Fountain pen
US4382707A (en) * 1980-03-21 1983-05-10 Koh-I-Noor Rapidograph, Inc. Felt tip writing pen

Also Published As

Publication number Publication date
CH341736A (de) 1959-10-15
FR1152674A (fr) 1958-02-21
GB795902A (en) 1958-06-04
DE1008605B (de) 1957-05-16

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