US2303373A - Fountain pen - Google Patents

Description

Dec. 1, 1942. I L, P. MQARTIN 2,303,373

FOUNTAIN PEN I Filed Nov. 3, 1941 3 I I Earlier.-

- I L Y/VN RMART/N I 5 M Kw Patented i, 1942 a 2,303,373

UNITED STATES PATENT OFFICE FOUNTAIN rm Lynn P. Martin, Fort Madison, Iowa, aaignor to W. A. Shel-tier Pen Company, Fort Madison, Iowa, a corporation of Delaware Application nd'mnm- 1941, Serb! No. 417,665

2: Claims. (or; 120-51) This invention relates to a fountain pen and many plastic materials shrink after the writing has special reference to the writing point and point and feed bar are disposed in posltion in writing fluid feeding means therefor. the bore thereof, making it sometimes practically More particularly, this invention relates to a imposihle to remove the writing point and feed fountain pen comprising a tubular barrel having 5 bar for repair.

a writing point with a tubular shank portion en- Seasoning of the plastic material, while for veloping one end of the barrel and extending the most part accomplished prior to the formaoutwardly from the end thereof, and a feed bar tion of the pen section, continues almost inhaving a shank portion engaging the bore of the definitely after the fountain pen is assembled barrel, a portion of the feed bar extending outlo for use. It so happens that the more usable wardly from the bore end of the barrel cooperplastic materials are subject to this deficiency. ating with the extending portion of the writing Therefore, while it would ordinarily be more depoint to direct writing fluid thereto. sirable to use those materials not given to per- The present invention also contemplates the ceptihie shrinkage after assembly of the founprovision of a writing point unit for a fountain l5 tain pen, such materials are, however, not so pen, the unit comprising a plug for detachable desirable to use because they are too brittle to connection with the fountain pen and a writing withstand the force of application of the writing point having a tubular shank portion for enpoint and the feed bar thereinto. Such other gaging and for enveloping at least a portion of materials as withstand to a greater extent the plug. The plug is preferably apertured for 20 the force of application of the writing point receiving a feed bar fitting in the aperture and feed bar into the bore thereof have the disthereof and the feed bar thus may be an ele advantages of shrinking to prevent, in a subment of the detachable unit. stantial percentage of instances, the successful The shank of the usual writing point together disassembly for repair thereof when necessary. with the end of a feed bar are ordinarily forced 25 The present invention contemplates the elimivby wedging into the bore of the'pen section. nation of the necessity of wedging the writing order to obtain the best possible fit of the compoint and associated feed bar into the bore of bined writing point and feed bar in the the section by employing a tubular shank which bore of the pen section, either the bore of the may envelope either the pen section or a plug pen section is recessed over a longitudinal por- 39 which may he detachably associated therewith. tion of the wall thereof to accommodate the Rather than the tendency to a high percentage thickness of the writing point, or the feed bar of breakage because of a force fit tending to is partially cutaway 'on the surface at the end expand the bore of the pen section, the present entering the bore of the section to accommodate construction tends to reinforce the pen section by the thickness of the writing point. At best, the w encircling the same.

fit of the combined writing point and feed bar The provision of a tubular shank portion aside in the bore of the section is not such as to whoHy from reinforcing the section by encircling it in seal the writing fluid in the foimtain pen. It an embraced relation, has strength imparted to is necessary to rely upon manual adjustment in it against bending stresses as is well known, a the relative positioning of the several elements tube having greater resistance to bending than and misalignment thereof is more than infrea strip or solid rod. The ordinary writing point quent. Further, since the point has is nothing more or less than a strip of relatively thickness there is a space at the edge on each thin metal bent laterally into a slightly arcuate side of the writing point of capillary cross section. Also, in the usual writing point, the spaces tending to direct the fluid from the where the shank thereof is inserted in the bore reservoir of the barrel outwardly therefrom to of the pen section, a pressure is imparted at the cause leakage. writing end thereof in the course of writ- The wedging of the combined feed bar and ing which creates a very substantial leverage writing point into the bore of the pen section tending to bend the writing point at the end results in a high percentage of breakage of 59 of the pen section, the end thereof being the either the feed bar or the pen section became of Fractures of the writing point usually a force fit. It has been found quite frequently occur at this place. In the present contemthat use of very desirable materials cannot be plated construction, the stress is directly against made because of the relative brittleness thereof the reinforced tubular portion of the writing to withstand the force of application. Also. 55 point;

Substantially the same amount of gold is used in the same exposed length of writing point of the present invention as in the writing point of the usual type because the unexposed shank end of the writing point of the latter type is ordinarily held between the feed bar and the section. The material thus hidden from view within the section of the usual fountain pen is employed in effect as an underneath strip or band for connecting opposite sides of the writing point to form a tubular shank in the present invention. In other words, the material which would otherwise be hidden from view is, in the present invention, exposed as the underneath portion of the tubular shank of the writing point.

As a matter of fact, the provision of a tubular shank portion eliminates the necessity for the substantial thickness ordinarily required at the shank end in the usual writing point, a shank portion of minimum thickness being stronger in the tubular writing point than a materially greater thickness in the shank of the usual writing point.

The present invention is admirably adapted to form an element of a writing point unit for detachable engagement with a holder. As above described, the ordinary writing point is assembled permanently in proper writing position upon the feed bar and then the assembled feed bar and writing point are permanently mounted in the section of the fountain pen barrel. It is desirable in this instance to assemble the completed pen at the place of manufacture because of the required nicety of adjustment of the writ ing point on the feed bar. However, it is desirable in retail sales of fountain pens to offer a prospective purchaser one type of writing point I and a particular barrel, both of which may happen to suit his taste.

In the present usual assembly of the writing points in the fountain pens at the place of manufacture, it has been necessary to maintain in a dealers stock a large assortment and variety of fountain pens because of the demand for different barrel designs, and writing points. Thus, the provision of a writing point unit permits the dealer to oifer a complete line of barrel designs and writing points with a minimum stock requirement.

Disassembly of the writing point and feed b from a barrel of a fountain pen for repair and subsequent assembly thereof after repair require highly skilled workmen such as cannot be maintained profitably in the retail stores. Such skilled workmen, for the most part, are limited in employment to the places of manufacture. The accurate positioning of the writing point relative to the feed bar, and the forcing of the associated writing point and feed bar into the pen section is an operation if performed by others than highly skilled workmen", would invariably result in damage to the writing point.

Dealers with but ordinary knowledge of fountain pen construction have undertaken to change a writing point using whatever tools are at hand. frequently resulting in an adiustment of the writing point on the feed bar different from the adjustment which would permit the most accurate and desirable flow of writing fluid, if not resulting in serious damage to the writing point such as splitting, breaking, or bending out of shape. The present invention contemplates the immediate substitution by the dealer of a writing point unit for the unit needing repairs, if it is necessary for the user to have uninterrupted use of the fountain pen. The unit is, thereafter, sent to the place of manufacture for the attention of the skilled worker.

One of the objects of this invention is to provide a fountain pen of the character indicated above wherein the writing point forms a part of a unit for detachable engagement with the barrel of the fountain pen.

Another object of this invention is to provide a fountain pen of the type noted above wherein the shank of the writing point is of tubular formation to envelope either the pen section or an element detachably engaged with the section or barrel of the fountain pen.

It is a further object of this invention to provide a fountain pen of the hereinabove referred to type which is relatively inexpensive to manufacture, is simple and efficient in operation and is durable. I

Other objects and advantages of this invention will hereinafter be more particularly pointed. out and for a more complete understanding of the characteristic features of the invention, reference may now be had to the following description when taken together with the accompanying drawing, in which latter:

Figure 1 is a side elevational view partially in section of a fountain pen embodying the features of this invention.

Fig. 2 is an enlarged fragmentary sectional view partially in elevation of the writing point end portion of the barrel of the fountain pen of Figure 1.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a side elevational view of a modified form of writing point unit embodying the features of this invention, and

Fig. 5 is a view similarto Fig. 2, incorporating the modified form of writing unit shown in Fig. 4.

Referring now to the drawing and more particularly to Figs. 1 to 3' inclusive thereof, the present invention is shown as being embodied in a fountain pen comprising a barrel ll having an open counter-bored end for receiving a reduced extension I l of a pen section II.

The barrel II and the pen section llare preferably formed of a plastic material, the material of the barrel being preferably opaqueand the material I! of the pen section being preferably of a transparent or translucent material. Also, the plastic materials of the barrel and the pen section differ in kind in the particular embodiment illustrated, the barrel being of a cellulose acetate orcellulose nitrate plastic while the section is formed of a methacrylate plastic. The cellulose acetate and cellulosenitrate plastics are not as brittle as the methacrylate plastic but the methacrylate plastic is less given to shrinkage than the former, and also has the property of not becoming fouled by writing fluids, so that gages the bore of the pen section l2, a portion at I the forward end extending beyond the end of the section. The inner end of the tubular sleeve I5 is provided with a reduced extension It to receive a flexible sac H, the sac acting as a r I u reservoir for writing fluid for the fountain pen.

aisoaavs Where the barrel l acts as the reservoir for a the writing fluid, the flexible sac, of course, is omitted and such construction will hereinafter i be described more particularly with reference to Fig. 5.

The extending end of the tubularsleeve has i an enlarged head portion l8, the juncture between the head portion and the main body portion of the tubular sleeve forming a shoulder I9v posite to the direction of the longitudinally tapered edge or shoulder l9. The bore of the tubular sleeve I5 is preferably concentric with the bore of the pen section I2 and of the barrel ID. A collar fitting around the outside of the tubular sleeve [5 buttsagainst the end of the pen section l2 at one end thereof, the other end being undercut and being preferably inclined in a longitudinal direction at the same or substantially the same inclination as the shoulder I9.

A writing point 2| has a tubular shank portion 22 and a radially inwardly directed flange 23 extending from the shank portion. The tubular shank portion-22 envelopes in frictional engagement the head It of the tubular sleeve l5 and the flange portion 23 is preferably longitudinally tapered for overlying the tapered edge I9 of the tubular sleeve l5 at the intersection of the relatively enlarged and reduced portions thereof; It may be desirable in order to prevent relative r0- tation between the writing point 2| and the sleeve l5 that an adhesive be employed therebetween or that spurs or other means be extended from the writing point into the material of the sleeve.

Such means are not shown, as an infinite variety the feed bar is preferably of substantially conical shape and both head and shank portions are provided with comb cuts 25 extending transversely thereof and a longitudinally extending fissure 26 for directing the flow of writing fluid from the reservoir to the writing point. A detailed description of a feed bar of the type illustrated herein is more particularly described in my co-pending application, Serial No. 417,667,

' filed in the U. S. Patent Oflice on November 3, #1941.

The tubular shank 22 of the writing point 2| is preferably longitudinally tapered to fit the longitudinally tapered peripheral surface of the head l8 of the tubular sleeve IS. The extension of the writing point portion of the writing point 2| engages in its longitudinally tapered direction th substantial conical head of feed bar 24.

The feed bar 24, the tubular sleeve l5, and the writing point 2| are preferably assembled as a unit at the place of manufacture, the feed bar being held in a fixed relation against relative 1ongitudinal movement with the tubular sleeve l5 by the tapered fit of the head thereof with the bore of the writing point. The writing point is held in a fixed relation with the tubular sleeve l5 by reason of the oppositely converging surface of the shank 22 and a flange 23 of the writing point 2|. The tubular sleeve I5, or as it has otherwise the direction of rotation.

been referred to as the apertured plug, is preferably formed of a methacrylate plastic material, the sameas that of the section I2. The writing fluid in passing from the reservoir or flexible sac i1 contacts the side-walls of the bore thereof in directing the fluid to the feed bar and from thence to the writing point. A clear or transparent methacrylate is preferably employed in order that the writing fluid may be visible therethrough. However, it is desirable that only such portions as is necessary of the transparent material be exposed to view and, therefore, the collar 20 is preferably of an opaque material so that all of the transparent portion that is exposed is that indicated at 12 in Fig. 1, adjacent to the end of the barrel III, the connecting band l3 and the shank of the writing point being opaque and together with the collar 2|! wholly concealing the remainder of the tubular sleeve.

The writing point and writing fluid feeding means are preferably housed in a cap 21, the cap being preferably of metal, although, of course, it is to be understood that any other substantially rigid material such as plastic, rubber, or the like may be suitably provided. A threaded collar 28 is fixed to the inside wall of the cap 21 for cooperating with the threads 14 of the band 13 to prevent accidental displacement of the cap from the end of the barrel III. In order that the writing fluid in the feed bar and slit 29 of the writing point be prevented from vaporation and to re-- tain the writing point in a moist condition, an inner cap 30 is slidably disposed within the cap, the open end of the inner cap bearing against the tapered periphery of the collar 20 to effect.

a seal and the inner cap 30 being urged in the direction of the open end of the cap by a compression spring 3|. The inner cap 30 is preferably of a plastic material, metal, rubber, or other composition.

When it is desired to flx the cap on the end of the barrel to effect a seal of the writing fluid, the writing point end of the barrel is inserted into the open end of the cap and rotated relatively thereto so that the threads 14 of the band l3 engage the threads of the band 28. The end of the inner cap engages the tapered peripheral surface of the collar 20 and the cap is moved against the compression of the spring 3|.

Because of the rotation necessitated by the engagement of the cooperative threads, the closed end of the inner cap is preferably pointed to provide a conical extension 32 which engages a conical recess 33 in a disc 34. One end of the compression spring 3i bears against the under side of the disc 34 and the other end of the compression spring bears against the end of the cap 21. Relative rotation therefore between the cap and the barrel is not extended to the com pression spring 3| which otherwise would have a tendency to wind and unwind, depending upon The substantial point contact between the conical shaped end 32 of the inner cap and the conical recess of the disc 34 substantially prevent any tendency toward rotation of the compression spring 3!. The limit of rotation between the cap and the barrel is deterwhere a plunger type pen is employed so that the clear section shown more particularly in Figs. 1 and 2 of the drawing is not necessary. Referring to Figs. 4 and 5 of the drawing, the writing point assembly has been adapted to a plunger type fountain pen. The barrel Illa of Fig. 5 is provided with an enlarged bore portion 38 at the end of the bore 31 of the barrel Ila.

The plunger, as is well known, operates in the bore 31 of the barrel to create a suction therebehind when moved in the direction of the writing point end of the barrel, the suction being relieved when the plunger engages the enlarged bore 36. Upon the release of the vacuum behind the plunger, writing fiuid is drawn into the barrel thereby for the filling operation.

Since no flexible sac is necessary to be employed, in the latter described construction, the barrel may be made of striated material, some of the striations of which may be cleaor transparent so that, as aforesaid, there is no occasion for a clear band, as has been described in connection with the previous embodiment. The writing point end of the barrel is provided with internal threads 38 in a counter-bored portion thereof, the end edge being counter-bored as at 39. The externally threaded locking band 40, similar to the previously described threaded band l3, aside from engaging the threads of the cap act to reenforce the end of the barrel into which a reduced threaded extension 4| of a apertured plug 42 is engaged.

A writing point 43 has a tubular shank portion 44 and a radially inwardly directed flange 45 extending from the shank portion. The tubular shank portion 44 fits over the head 42 of the apertured plug and the flange portion 45 is preferably longitudinally tapered for overlying the tapered edge of the plug at the intersection of the relatively enlarged and reduced portions thereof.

A feed bar 46, the same as that previously described with reference to Figs. 1 and 2, is provided with an enlarged head portion and a reduced shank portion. The shank portion is engaged in the bore of the apertured plug 42 and extends therethrough into the bore of the pen section Illa. The head portion of the feed bar 46 is preferably of substantially conical shape and both head and shank portions are provided with a longitudinally extending fissure for directing the flow of writing fluid from the reservoir to the writing point and transversely extending comb cuts which act in the capacity of expansion chambers for containing such excess supply of writing fluid as is not needed for ordinary writ- The feed bar 46, the apertured plug 42, and the writing point 43 are preferably assembled as a unit at the place of manufacture, the unit being shown more particularly in Fig. 4. The feed bar is held in a fixed relation against relative longitudinal movement with the apertured plug 42, as in the previously described modification, by the tapered fit of the head thereof with the writing point. The writing point is likewise held in a fixed relation with the apertured plug 42 by reason of the oppositely converging surfaces of the shank 44 and flange 45 of the writing point.

The unit as a whole is secured to the end of the barrel Ilia by the threaded engagement of the reduced shank 4| of the apertured plug engaging the internally threaded bore at the end of the barrel. Different types of filling devices demand different types of sections and no effort is made herein to relate the present invention to all of the different types. The apertured plug 42 as well as the apertured plug or tubular sleeve I! may be considered as the pen section or may be an element thereof. As a matter of fact, in the present description and in the following claims, the pen nib is recited as having a tubular shank portion enveloping one end of the barrel and extending outwardly therefrom. Thus the apertured plugs of both modifications may be considered one end of the barrel as rightly they may, since instead of having the part forming the apertured plug separate or detachable from the barrel, it may, of course, be formed integrally therewith or as a part of the barrel.

The provision of a writing point unit as has been previously mentioned herein permits the reduction to a minimum of the stock necessary by a retail dealer so that the writing point units may be interchangeable with various designs of fountain pen barrels. However, if the provision of a detachable writing point unit'is not desired, then the nib may be secured directly to the barrel without departing from the spirit and scope of this invention. Further, by reason of the construction of the writing point, the shank materials heretofore considered undesirable from thereof being tubular, different types of plastic the standpoint of fracturing may be employed in association therewith, since the writing point tends to re-enforce the plastic rather than to put a strain thereon.

While but two embodiments of this invention are herein shown and described, it is to be understood that various modifications thereof may be apparent to those skilled in the art without departing from the spirit and scope of this invention, and, therefore, the same is only to be limited by the scope of the prior art and the appended claims.

I claim:

1. A fountain pen comprising a barrel, a writing pointhaving a tubular shank portion enveloping one end of said barrel and extending outwardly from the end thereof, and a feed bar having a shank portion engaging the bore of said barrel and a portion extending outwardly therefrom cooperating with the extending portion of said writing point to direct writing fluid thereto.

2. A fountain pen comprising a barrel, a writing point having a tubular shank portion enveloping one end of said barrel and extending outwardly from the end thereof, and a feed bar having a shank portion engaging the bore of said barrel and an enlarged head portion extending outwardly therefrom cooperating with the extending portion of said writing point to direct writing fluid thereto.

3. A fountain pen comprising a barrel for housing a writing fluid reservoir, a writing point having a tubular shank portion enveloping one end of said barrel and extending outwardly from the end thereof, a feed bar having a shank portion engaging the bore of said barrel and a portion extending outwardly therefrom, and means on said feed bar for diverting a supply of writing fluid from said reservoir to said writing point and for storing such excess of writing fluid as is unnecessary for writing.

4. In a fountain pen, a writing point unit comprising a plugfor detachable connection with said fountain pen. and a writing point having atuhularshankportionformgagiugandfor enveloping at least a portion of said 1 11:-

5.Inafountainpen,awritingpointunitcmns and for veloping at least a portion of P ug.

6.Ina fountainpemawritingpointunitcmnprising a plug for detachable connection with saidfountainpemawritingpointhavinga tubular shank portion forenvelqling at least a portion of said plug, and a radially inwardly directed flangeon saidshankportionfor overlying an edge of said plug.

'LInafountainpen, awritingpointunitcomprising a plug for detachable connectirm with said fountainpen,saidphrghavingalona'tudinally tapered peripheral surface, a writing point having a tubular shank portion with a lkmgitndinally tapered bore for fitting the tapered peripheral surface of said plug, and a radiam inwardly directed flange on said shank portion for overlying an edge of said plug.

8. Inafountainpen,awritingpointunitcomprising a plug for detachable connection with said fountain pen, said plug having a 1 nally tapered peripheral surface and an oppositely tapered edge, a writing point having a tubular shank portion with a lonmhldinallytapered bore for fitting the tapered peripheral surface of said plug, and an oppositely tapered inwardly directed flange on shank portion for overlying the tapered edge of plug.

9.In afountainpen,a writingpointunitcmnprising an apertured plug having a reduced extension for detachable connection with said founaninwardlydirectedflangeonsaidshankportion between said head and said barrel.

13- A fountain pen comprising a barrel having anopmendaplugdetachablysecuredtosaid openend,a.writingpointhavingatubul u-shank portion thereof enveloping at least a portion of said plug, and a radially inwardly directed flange formed integrally on said shank portion tain pen, the enlarged portion of said plug having a longitudinally tapered peripheral surface and a tapered edge at the juncture of the extension, a writing point having a hihular shank portion with a longitudinally tapered bore for fitting the tapered peripheral surface of said plug, an oppositely tapered inwardly directed flange on said shank portion for overlying the tapered edge of said plug for preventing relative longitudinal movement.

lfilnafountainpen, awritingpointimitmmprising an apertured plug for detachable connection with said fountain pen, said plug having a longitudinally tapered peripheral surface, afeedbarfittingintheapertureofsahlpdug and having an extension with a longitudinally tapered peripheral surface, and a writing point having a tubular shank portion with a longitudinally tapered bore for fitting the tapered peripheral surface of said plug, said shank portion having an extension with a longtudinally tapered under surface for m 11 the tapered peripheral surface of said feed bar, and a radially inwardly directed flange on said shank portion for overlying the end edge of said plug.

11. A fountain pen comprising a barrel having .anopenend,aplugdetachalflysecuredtosaid open end, and a writing point having at least a portion thereof enveloping at least a portion of said plugandbeingtherebysecuredtlm'eto and to said open end.

12. A fountain pen comprising a barrel having an open end, a plug comprising a head portion andareducedextensiomsaidextensinnbeing detachably secured to said open end, a writing point having at least the shank portion thereof enveloping at least a portion of said plug, and

"and being disposed between said plug and said barrel.

14. A fountain pen comprising a barrel having anopenenisaidbarrelhavinganimdercut edge portion, a plug detachably secured to said openend,awriting pointhavingatubularshank portion thereof enveloping at least a portion of said plug, and an inwardly directed projection portion on said shank for engaging said undacut portion between said barrel and said plug.

15. A fountain pen comprising a barrel having anopenendsaidbarrelhavingacircmnferential undercut at the outer edge thereof, a plug detachahly secured to said pen section, a writg point having a tubular shank portion thereof enveloping at least a portion of said plug, andamdiallyinwardlydirectedflangeonsaid shank portion-between said plug and said section it)! M11141: said circumferential undercut.

16. A foimtain pen comprising a barrel having an open end, said barrel having a circumferential tapered undercut at the outer edge thereof, a plug demhably secured to said barrel, said plug having a longitudinally tapered circumferential edge portion, and a writing point having a, tubelar shank portion thereof enveloping at least a portion of said plug, and a longitudinally tapered circumferential flange overlying said circumferential edge portion and being disposed in said undercut.

17. A fountain pen comprising a barrel having an open end, a pen section eng g said open end, an apertured plug detachably secured to said pen section, a feed bar fitting in the apertureofsaidplugand havinganextensinntherefrom, a'writing point having a tubular shank portion thereof enveloping said plug and an extension overlying said extension of said feed bar, and a radially inwardly directed flange formed in a on said shank portion and being disposed lietween said plug and said section.

18. A fountain pen comprising a barrel havopen end, a transparent pen section en.- a illg said open end, a transparent apertured plug having a head and a reducedend, said reduced end e gaging the bore of said pen section, a feed bar fitting, in the aperture of said plug and extending outwardly therefrom, a writing pointhavingatubularportion attheshankend thereof for engaging and for enveloping the head ofsaidplugandaforwardlyextendingportion for overlying said feed bar, and an opaque band overlying and being in engagement with a portionofthereducedendofsaid plugadiaceutsaid writing point.

19. A fountain pen comprising an op q e barplug and extending outwardly therefrom, and a writing point having a. tubular portion at the shank end thereof for engaging and for envelop ing the end portion of said plug extending forwardly of said opaque band, said writing point having a forwardly extending portion for overlying said feed bar.

20. A fountain pen comprising'a barrel having an open end and a cap therefor, a pen section enga ing said open end, a band fixed to said pen section, said band having connecting means thereof for engaging and for enveloping at least a portion of said plug and a forwardlyextending portion for overlying the enlarged head portion of said feed bar.

21. A fountain pen comprising a barrel having an open end and a cap therefor, a pen section engaging said open end, a threaded band fixed to said pen section, the threads of said band engaging threads on said cap for detachable engagement of said cap and barrel, an apertured plug having a reduced portion for engaging the bore of said section, a feed bar having a portion fitting in the aperture of said plug and an enlarged substantially conical-shaped head portion extending outwardly therefrom, and a writing point having a tubular portion at the shank end thereof for engaging and for enveloping said plug and a forwardly extending conveying portion for overlying the conical-shaped head portion of said feed bar.

22. A fountain pen comprising a barrel having an internally threaded open end, anapertured plug having a threadedextension engaging said open end, a feed bar having a portion fitting in the aperture of said plug and a head portion extending outwardly therefrom, and a writing point having a tubular portion at the shank end thereof for engaging and for enveloping said plug and a forwardly extending portion for overlying the head portion of said feed bar.

23. A fountain pen comprising a barrel having an internally threaded open end, an externally threaded band fixed to said pen section, said open end having an undercut edge portion, an apertured plug having an externally threaded end for engaging said internally threaded open end and a shoulder disposed adjacent said undercut edge portion, a feed bar fitting in the aperture of said plug and extending outwardly therefrom, and a writing point having a tubular portion at the shank end thereof for engaging and for enveloping said plug, and a radially inwardly directed flange urged into engagement with said undercut edge portion by said shoulder, said tubular portion having a forwardly extending portion for overlying said feed bar.

LYNN P. MARTIN.

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