US3724962A - Fountain pen - Google Patents

Fountain pen Download PDF

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Publication number
US3724962A
US3724962A US00123953A US3724962DA US3724962A US 3724962 A US3724962 A US 3724962A US 00123953 A US00123953 A US 00123953A US 3724962D A US3724962D A US 3724962DA US 3724962 A US3724962 A US 3724962A
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US
United States
Prior art keywords
storage body
fountain pen
pen according
ink
webs
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
US00123953A
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English (en)
Inventor
H Herrnring
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.)
MONTBLANC SIMPLO GmbH DT
Montblanc Simplo GmbH
Original Assignee
Montblanc Simplo 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 Montblanc Simplo GmbH filed Critical Montblanc Simplo GmbH
Application granted granted Critical
Publication of US3724962A publication Critical patent/US3724962A/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
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02—Ink reservoirs

Definitions

  • fountain pen in addition to comprising a complete writing instruinent, also includes a writing insert which similar to the cartridge of a ballpoint pen can be inserted in a corresponding housing and can be discarded when it is exhausted.
  • FIG. 1 is anaxial section through the front end of a fountain pen according to the invention.
  • FIG. 2 illustrates in a broken-off side view andon an enlarged scale the tube which carries the helical body.
  • FIGS. 3-5 represent cross-sections taken along the lines- III III, IV IV and V Vrespectively of FIG.
  • I IG. 6 is a'topview of the ink conducting bodywhich closes the helical body off from below.
  • FIG. 7 is a vertical section along theiline VII VII of no.1.
  • FIG. 8 is a top viewof a section of 'thehelical paths for the tubular helical body on -a greatly increased scale.
  • FIG. 9 represents a section taken along the line IX IX of FIG. 8.
  • FIG. 10 is an illustration-similar to that of FIG. 8 and shows a'modified design of thehelical paths of the. helical body.
  • FIG. 1 1 represents a diagrammatic illustration-to show the distribution of thewebs overthe length of the helical paths of-the helical body.
  • FIG. 12 is a broken off vertical sectionthrough the front closing member'of the fountainpen accordingto the invention.
  • FIG. 13 is a cross-section taken along XIII, on the scale of FIG. 12, of FIG. 1.
  • FIG. 14 is a top view of the unfinished correspondingly curved pen illustrated in section, in FIG.
  • the fountain pen according to the present invention in which for purposes of storing ink there is employed a helical tubular body the spiral-shaped capillary storage the line XIII means of which is formed by superimposed helical sections with webs therebetween while the height of the webs is substantially constant, is characterized primarily in that the helical tubular body has in axial and radial direction a capillarity which increases toward the pen.
  • the spacing between the webs in the layers of the helical body that the spacing increases with increasing diameter of the helical body and further decreasing in axial direction toward the pen.
  • the distance between the webs may advantageously be so dimensioned that the webs of adjacent helical layers are offset with regard to each other.
  • the present invention is further characterized by the feature that the end face of the helical body at the side of the pen isdrawn inwardly in a substantially truncated cone-shaped manner and engages an ink conducting body which with regard to the end face of the helical body forms air passages and ink capillaries which interconnect the indidual helical layers.
  • an ink conducting body which with regard to the end face of the helical body forms air passages and ink capillaries which interconnect the indidual helical layers.
  • the fountain pen illustrated FIG. 1 comprises in customary manner , a mantle tube 1.
  • the writing pen 20 protrudes from the lower end of the tube 1 and surrounds the ink storage means 30 and also surrounds the ink conducting means with the pen.
  • the article shown in FIG. 1 may represent a fountain pen insert or a cartridge which is insertable into a special housing as it is known in connection with fillers or refills for ballpoint pens.
  • the mantle l as indicated in FIG. 1 by dash lines, may be provided with camsor guiding ribs 9 which will prevent a rotation and therebysecure the position of the insert.
  • the front end of the mantle tube 1 is closed by aperforated closure member 3 whereas the rear end of tube 1 is closed by a perforated closure member 2.
  • preferably two-part tubular body 40 extends between the closure members 2 and 3 and has its central smooth-walled portion forming the core for the helical body 30.
  • the rear end of the upper closure member 2 is providedwith a recess 4 for an ink cartridge 6 which can I be connected to the seat area 5 in a liquid-tight manner in order, after exhaust of the ink storage means, to refill ,the same formed by the helical body 30, through bore 7.
  • the rear end of the closure member 2 may be provided with a push-open element known per se.
  • FIG. 2 shows one portion of the tubular body 40 illustratedin FIG. 1.
  • This section comprises a smooth walled part 42 and an end portion 41 provided with axial folds or ribs 46.
  • the smooth walled portion 42 serves as winding core proper for the helical body 30, whereas the tubular part 41 with the axial folds 46 serve for securing the position and the connection in the closure members 2 and 3 and also for holding the ink conductors 50 and 50'.
  • the folds are machined off over a length of approximately millimeters whereby in the surface of the tube 40, windows 43 are formed forming ventilating and filling openings.
  • the ink conductor 50 and also the ink conductor 50' which for manufacturing reasons is designed the same way as the ink conductor 50, has a central bore 55 which corresponds to the outer diameter of the smooth walled tube portion 42.
  • This bore 55 is at the bottom thereof provided with widened portions 54 into which the ends of the folds 46 at the merging area of the two tube portions 41 and 42 may positively extend.
  • the dimensioning is effected in such a way that the just mentioned windows 43 extend into the region of the adjacent end surfaces of the helical body 30.
  • the outside air can through bore 8 of the closure member 3 and through bore 44 of pipe 40 reach the end face of the helical body 30 through the windows 43.
  • the ink conductor 50 has three radial slots 53 which with each other form right angles.
  • the conical surface of the ink conductor has a large surface flat recess which together with the adjacent end face of the helical body forms a capillary ink gap 52 which preferably in the direction toward the pen becomes narrower which means in this direction has a greater capillarity.
  • This wedge-shaped gap aids the discharge of air bubbles in the direction to the window 43 of the tube 40.
  • the lower ink conductor 50 also serves for holding and guiding the writing pen which latter is designed as shown in FIG. 14. Over an arc of approximately 180, the ink conductor 50 is slightly machined off so that with regard to the tube 1, a narrow gap is formed which corresponds to the thickness of pen 20. Ears 23 provided on the pen 20 rest against the ink conductor 50 and with angled portions 23 engage the air slots 53 of the ink conductor 50.
  • the capillaries 21 which are covered up and lead into a pen gap 22 are at the upper end of pen 20 opened by a machined-off portion and in this area are adjacent the capillary ink gap 52.
  • Air slots 25 at the upper end of pen 20 serve for ventilating the annular space which is provided within the tube 1 and surrounds the helical body 30.
  • FIGS. 8-10 illustrate the widened helical path 31 of the helical body on a highly enlarged scale. From a smooth or slightly roughened foil path, solid parallelepiped-shaped cams or webs 32 protrude.
  • the foil path 31 and the webs 32 may consist of different materials firmly connected to each other while the materials and their connection are ink resistant and must be flexible and may consist for instance of synthetic materials such as polyesters, polyethylene,
  • the webs 32 are arranged in rows 35 and are interrupted by gaps 36.
  • the webs 32 between the individual rows 35 are offset with regard to each other so that the ink film flowing therebetween will in case of an axial shock be held better as if by impact walls.
  • the individual rows of webs 35 together with the next following smooth side of the helical path 31 form gaps in the helical body 30, the cross section of said gaps being determined by the distance 38 between the rows.
  • the foil path 31 may have holes 37 which in wound-up condition interconnect the individual helical layers.
  • the webs 32 may for instance have a width of from 0.1 to 0.2 millimeters and may have a length of l millimeter while they may have a height of 40 microns.
  • the distances 36 approximately equal the distances 38 between the rows.
  • the course of the rows of webs 35 on the entire stretched out helical path 31 of the helical body 30 is indicated in FIG. 11.
  • the shorter rhombus side is the start 39 of the helical body 30 on the central helical tubular body 30 which rests on the central tubular body 40.
  • the end 39 of the helical path 31 of the helical body 30 is the wider side of the trapezoid and after the winding-up operation is connected for instance by adhesive means or an adhesive strip.
  • the numbers a1-a58 at the margin of the helical path 31 designate the number of helical or winding layers starting with the innermost layer of that side of the helical path 31 which faces away from the pen.
  • the number of the winding layers are designated with blb66.
  • the course of the web row 35 in the individual layers is indicated by the dash-lined pairs of lines between the margin which faces toward the pen and which faces away from the pen. Each pair illustrates the course of a web row 35 and of the tenth following web row 35. As shown in FIG. 11, the distance 36 between the web rows 35 is the shortest in the innermost winding layer and increases with increasing diameter of the helical body 30.
  • FIG. 11 shows that the distance 38 of the web row 35 from the margin of the winding path 31 facing away from the pen widens toward the margin which faces toward the pen.
  • the angle a between the angular path margin (bl-I266) at the side of the pen and the web row 35 becomes less with increasing number of the windings from b1 to b66.
  • R represents the variable radius of the helical body 30 and the K factors are constants, or if the successive body webs are polygonal, the following formula may be formulated:
  • the fountain pen according to the present invention operates as follows. In view of the wetting. contact of the ink thread with the paper to written upon at the tip 24 of the pen, the ink is drawn out of the ink gap 22. This ink gap is fed by the feeding capillaries 21 in pen 20. The feeding capillaries 21 withdraw ink from the wedge-shaped gap 52 of the ink conductor 50 which communicates with all winding layers of the helical body 30. Any air which may be present, can escape through the window 43 of the tubular body 40 as well as through the pen cutouts 25 into the peripheral cylinder-shaped air passage between tube- 1 and the helical body. The peripheral air passage is through air slots 53 of the ink conductor 50 and the pertaining window 43 connected to the outside air.
  • the capillary ink storage means is adapted to be fed and post-filled throughthe tubular body 40 from the front side as well as from the rear side.
  • a second opening will be made for instance in the cartridge bottom through which air can enter the cartridge.
  • the supply of ink to the capillary body will in all instances occur through the window openings 43 of the wound tubular body 40 adjacent to which as indicated in FIG. 1 a closure body may be provided which prevents a straight passage through pipe 40.
  • a tubular housing having a pen at one end, and ink storage means in said housing in communication with said pen, said ink storage means comprising a spirally coiled strip forming a storage body, said strip being formed with protuberant webs whereby adjacent convolutions of the storage body formed by said strips are radially spaced from each other for flatter through-passages, said storage body thereby increasing in capillarity in the axial and radial directions toward said pen, said webs extending from edge to edge of said strip and being inclined to the direction of the length of said strip and having a greater pitch near the axis of said storage body than near the periphery thereof, the ratio of the spacing between adjacent webs in longitudinal direction of the web to the height of the web at the side of the web adjacent to rear end of-the storage body being from about 5 to 1 to about 8 to l and at the opposite side of the web ad jacent to the pen being about 8 to 1 to about 18 to l.
  • a fountain pen according to claim 1 in which the radial spacing between adjacent convolutions of said storage body increases in the radially outward direction thereof.
  • a fountain pen according to claim 1 in which said webs are from about 10 to microns in height.
  • a fountain pen according to claim 1 in which said webs are from about 20 to 40 microns in height.
  • a fountain pen according to claim 1 in which the end faces of said storage body are connected to atmosphere.
  • a fountain pen according to claim 1 in which at least one of the axial and peripheral portions of said storage body is connected to atmosphere.
  • a fountain pen according to claim 1 in which at least the pen end of said storage body is formed as a frustoconical recess.
  • a fountain pen according to claim 1 which includes a tubular core member on which said storage body is mounted.
  • a fountain pen according to claim 1 which includes a tubular core member extending axially through said storage body and having radial apertures at the level of at least one end of said storage body.
  • a fountain pen according to claim 12 in which ink is adapted to be supplied to said storage body via at least one open end of said core member.
  • a fountain pen according to claim 12 in which one end of said tubular core member is in the form of an ink cartridge piercing point.
  • a fountain pen according to claim 1 which includes a tubular core member extending axially through said storage body and having radial apertures at the level of at least one .end of said storage body, said tubular core member having axial ridges protuberant therefrom axially outwardly from said storage body and serving as locating elements.
  • a fountain pen which includes an ink conducting body abutting at least the pen end of said storage body and provided with at least one capillary passage interconnecting the spaces between all convolutions of said storage body with said pen and also being provided with passages to the atmosphere.
  • a fountain pen according to claim 16 in which said capillary passage is wedge shaped and increases in capillarity toward said pen.
  • a fountain pen according to claim 1 which includes an ink conductor body at each end of said storage body, and resilient means clamping said ink conductor bodies against the ends of said storage body.
  • a fountain pen according to claim 1 which includes an ink conducting body abutting said storage body on the pen end thereof, said ink conducting body engaging the inside surface of said pen and locating said pen relative to the ink conducting body.
  • a fountain pen according to claim 1 in which each said web is in the form of a series of elongated protuberance arranged in axial alignment in spaced relation.
  • a fountain pen according to claim 21 in which the gaps between adjacent protuberances in each web are staggered from those in the adjacent webs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pens And Brushes (AREA)
US00123953A 1970-03-14 1971-03-15 Fountain pen Expired - Lifetime US3724962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2012266A DE2012266C3 (de) 1970-03-14 1970-03-14 Füllfederhalter

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US3724962A true US3724962A (en) 1973-04-03

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DE (1) DE2012266C3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507111A (en) * 1981-03-09 1985-03-26 Whitman Medical Corporation Surgical scrub
US5749520A (en) * 1996-12-18 1998-05-12 S. C. Johnson & Son, Inc. Liquid air freshener dispenser device with capillary wicking means
US5749519A (en) * 1996-12-13 1998-05-12 S. C. Johnson & Son, Inc. Liquid air freshener dispenser device with nonporous wicking means

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587949A (en) * 1947-03-03 1952-03-04 Parker Pen Co Fountain pen
US2648309A (en) * 1950-09-23 1953-08-11 Parker Pen Co Fountain pen
US2684052A (en) * 1948-09-11 1954-07-20 Parker Pen Co Writing instrument
US2782763A (en) * 1953-06-24 1957-02-26 Parker Pen Co Fountain pens
US2784699A (en) * 1952-11-06 1957-03-12 Sheaffer W A Pen Co Writing implements
US2847976A (en) * 1955-10-24 1958-08-19 Parker Pen Co Spacer pattern for capillary reservoir elements
US2855898A (en) * 1955-10-26 1958-10-14 Parker Pen Co Capillary reservoir elements

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587949A (en) * 1947-03-03 1952-03-04 Parker Pen Co Fountain pen
US2684052A (en) * 1948-09-11 1954-07-20 Parker Pen Co Writing instrument
US2648309A (en) * 1950-09-23 1953-08-11 Parker Pen Co Fountain pen
US2784699A (en) * 1952-11-06 1957-03-12 Sheaffer W A Pen Co Writing implements
US2782763A (en) * 1953-06-24 1957-02-26 Parker Pen Co Fountain pens
US2847976A (en) * 1955-10-24 1958-08-19 Parker Pen Co Spacer pattern for capillary reservoir elements
US2855898A (en) * 1955-10-26 1958-10-14 Parker Pen Co Capillary reservoir elements

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507111A (en) * 1981-03-09 1985-03-26 Whitman Medical Corporation Surgical scrub
US5749519A (en) * 1996-12-13 1998-05-12 S. C. Johnson & Son, Inc. Liquid air freshener dispenser device with nonporous wicking means
US5749520A (en) * 1996-12-18 1998-05-12 S. C. Johnson & Son, Inc. Liquid air freshener dispenser device with capillary wicking means

Also Published As

Publication number Publication date
DE2012266A1 (de) 1971-10-07
DE2012266B2 (de) 1978-08-10
DE2012266C3 (de) 1979-04-12

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