US2500833A

US2500833A - Fountain pen

Info

Publication number: US2500833A
Application number: US559514A
Authority: US
Inventors: Henry C Klagges; Harry C Kofke
Original assignee: Esterbrook Pen Co
Current assignee: Esterbrook Pen Co
Priority date: 1944-10-20
Filing date: 1944-10-20
Publication date: 1950-03-14
Anticipated expiration: 1967-03-14

Description

March 14, 1950 H. c. KLAGGEs r-:TAL

FOUNTAIN PEN 2 Sl'xeets-Sheerl l Filed Oct. 20, 1944 ,l s'a'srarararsra' BON Invenms:

March 14, 195o H. C. KLAGGES ET AL.

FOUNTAIN PEN 2 Sheets-Sheet 2 Filed Oct. 20, 1944 Invenms:

HarryllKnke m E N. E Dm, H

Patented Mar. 14, 1950 UNITED STATES PATENT OFFICE FOUNTAIN PEN Henry C. Klagges, Collingswood, N. J., and Harry C. Kofke, Philadelphia, Pa., assignors to Esterbrook Pen Company, Camden, N. J., a corporation of New Jersey Application October 20, 1944, Serial No. 559,514

(Cl. 1Z0-47) 18 Claims.'

1l Our invention relates to Writing implements of the type or character of fountain pens, and to simple and efficient means for supplying theV A further object of our invention is to provide'a relatively short ink sac, which may be molded into a more or less special shape from rubber or similar elastic material,y and so constructed and/or arranged that a portion of the same may be telescoped longitudinally within another portion thereof to displace substantially all of the air contained Within said sac and then retracted to permit ink to enter and substantially ll the entire space formerly containing air.

A further object of our invention is to provide simple and efiicient means for operating the ink sac in both directions; preferably by a single stroke in each direction.

A further object of our invention is to provide operating means having or being associated with a plug element disposed internally of the ink sac and designed to enter a bore portion of the pen section so as to effect substantially complete displacement of air therefrom and insure that the sac and the pen section-together constituting the sole reservoir-shall be lled with ay A further object of our invention is to provide means for telescoping the ink sac in ,thev form of a longitudinally reciprocable plunger so proportioned and arranged that asingle vstroke of the same toward the nib end of the Writingl implement will be sufficient to completely telescope or collapse the ink sac and cause the plug element disposed within the same to enter al bore portion of the pen section and effect substantially complete displacement of air within the same as well as that within the ink sac so that when the plunger is retracted, a supply of,

ink will substantially ll -the ink sacas welllas the bore portion of the pen section. A coiled spring may be employed to return the plunger to its initial position and the shell or casing of the Writing implementthe barrel, for instancemay be provided with a removable cap sleeve whereby access to the operating stem` of theA plunger may be gained.

A further object of our invention is to provide lever-operated means directly accessible eX- ternally of the shell or casing of the writing implement for effecting reciprocative movement'of a plunger designed to telescope or collapse the ink sac.

A further object ofk our invention is to pro- 1vide operating mechanism for the ink sac of such a character that it as Well as the ink sac may` be insertedin the shell or casing of ythefj writing implement and 'removed therefrom as a complete assembly or entity.

A further object yof our invention is to provide the plug element disposed internally of the ink sac and designed to enter a bore portion of the pen section as an integral part of such ink' ative means in attaching the ink sack to the` plunger of the operating mechanism.

These and other features of our invention are more fully set forth hereinafter; reference being had to the accompanying drawings, more or less diagrammatic in character, in which:

Figure l is a longitudinal-sectional view of a writing implement of the fountain pen type equipped with lling means within the scope of our invention and showing one form of operating mechanism therefor.

Fig. 2 is a similar view, partly in section, showing portions of the structure illustrated in Fig. 1 in another position.

Figs. 3 and 4 are fragmentary views in section and on a larger scale illustrating details of construction Within the scope of our invention.

v Fig. 5 is a longitudinal sectional view, similar to Fig. 1, illustrating another formof fountain pen structure and another form of loperating mechanism designed to effect the teleseop, ing of the ink sac in a filling operation.

Fig. 6 is a fragmentary sectional view illustrating a further modification in fountain pen construction.

Figs.v 7 and 8 are cross sectional views on the lines VII-VII and WIL-VIII, Fig.

views on a larger scale illustrating another formi:

of ink sac and its relation to the pen section within the scope of our invention; Fig. 13 show'- ing the ink sac in its normal positionandgfuncg.- tioning as an ink reservoir When the ,fpen isinuse; and Fig. 14 showing the ink sac in its telescoped:

condition preliminary to a filling operation, and

Fig. l illustrates a detail of construction with-- in the scope of our invention.

Our improvements are preferably, but notnecjessarily, associated with a fountain pen of the type in which the barrel thereofor the pensece ar renew-point insert.

The pen section-which we employ in ourimproved structure, as distinguished fromv ordinaryy or usual pen sections common to present-.day

fountain pens, is provided with a plurality, of.. bore portions axially. aligned; an outer bore lporl tion .receiving the sleeve of the renew-point? insertwhich is preferably in threadedengage. ment therewith, an inner bore portion which .is

considerably enlarged in cross-sectional dimension and which may be cup-shaped, and a short.v intermediate borefportion Vwhich connectsl .the .ine-- nerfenlargedbore portion and 'thesleeve-receve inggfboreportion and. is .of less diameter..v

With this pen section-and itwill be underf-v stood, of course, that the outer-sleeve-receiving bore portion of the same may be fitted withany form of pen nib and feed-bar assembly that will: extend to the intermediate bore portion-We.em.l ploy a special form of telescopic ink sac-which.

maybe of two dimensions in cross-sectional area longitudinally of the same-with the outer ande larger portion permanently attached to that pore tion of .the pen section having the enlarged bore portion.

The outer wall surface of such inner enlarged bore portion of the pen section isspacedirom the inner wall surface of the shell or casingof`- the .pen structure-the barrel, forA instance-to...

an extent ljust suicient to receive the` wall of` the ink sac which will lie between the same ,and the inner wall surface of the shell or casingin.

such relation that the pen section, with the ink,V

sacpermanentlyattached thereto, may be readily inserted in such shell or casing` when the .parts of the pen structure are assembled.

Theprincipal feature of our invention Iislthe.- provision, in a Writing implement of the fountain v pen type, of a specialform of'ink sac specially arranged-or associated with our improvedpem section; which inksac is intended. primarily, in connection with the space. definedby the inner enlargedbore portion .of the vpen section,.to serve as .the entireink reservoir of 'thefountainpenL Such ink sac is highly exible or elastic sothat it may be telescoped within itself and theenf larged bore portion of the pen section to displace substantially the entire content offair therein4 when a portion of such sac is moved in one directionv whereby, upon. dipping the nib ofthe fountain pen in a supply of ink, the latter. willsubvv stantially ll the space denedby the enlarged" Y 20 tion .mounted in the end of such barrel. receives. aninsertible sleeve carrying a pen nib andfeedf. bar. assembly-more or less :familiarly known. as.

bore portion of the pen section and the interior of the ink sac after the latter has been retracted to its normal position.

In the drawings, and referring more particularly to Fig. 1 of the same, the shell or casing of the writing,implement-thebarrel of a fountain pen; for instance-is indicated at and the forward end of the same carries a pen section H; which may be made of any usual materialtransparent or not, as may be desired. In the present instance the pen section is shown as havinga borefportion llafreceiving a renew-point insert consistingbf a sleeve I2 which may be in threaded v.engagement with said bore portion lia, witl'ifa nibsorV pen-point I3, and a feed-bar I3a carriedby said sleeve. In the present instance, the sleeve |2is shown as engaging a seat it withirri.the:penl.section. It is within the scope of our invention to employ other forms of pen nib and feed-barassemblies'which may be in frictional engagement withthe outerbore` portion lla of the :pen section with a..feedbar extending sub--v stantially to the seat I4. Beyond the inner end` of-f the renew-point.v insert (or other form of 1 pennib and feed-bar assembly), the pen section is vprovided with ashortintermediate bore portion I5.of less. diameter than the bore `portion I la, and

this bore portion l5 opens into an enlarged borey portion.-liformedwithin the inner endpor-tion Il ofrthe pen section and preferably of rounded,

cup-like form. Thepen section Il maybe tted totheshellor casing Hlin any usual way.

Carried. by.. the innerY portion il of the pen. sectionfisan ink-'sac 20; which may be oi thel shape shown, that is to say, it may be molded with port-ions Zta. and.. 20,? of differentV diameters so relatedto .each other tl'lattl'ie` outerwali surface. of-.thezsmaller.portion 20a may -be alignedwithv thel inner wall. surfaceof the enlarged bore portion.|6 of the pen section, for a purpose to lbe described. Theotherfend of the ink sac is permanently attached `to the pen section.

The free. end of the ink sac, in the form of fountainpen structure illustrated in Fig, 1, is operatively connected `to the end of a screwelement' 25, in the present instance an internally threaded. sleeve, which .serves as a nutand may befreciprocatedin the shell or casing of the fountain pen; being in operative engagement with a screwstem Zrotatably mounted in the rear of thesame.. This screw stem may be turned by. manipulating. an external knob 2'! but is held against longitudinal movement. 1t will be understood` therefore .that=turning of the knob 21 will effect rotation of the screw stern 2t and reciprocation of the sleeve 25 whose inner end is attached to the ink, sac 2E?.A This ink sac, which may be of the shape shown, is arranged to telescope, as illustrated in Fig. 2, to displace air therefrom and from the pen section, and this is eiected by the screw stem 26 when the latter is turned in one direction; m0vement.of such screw stem in the oppositedirection retracting the sleeve 25 andv returning -the ink sac to its normal position with the simultaneous inflow of ink when the nib end of .the'fountain pen is immersed in a supply of the same. As illustrated, movement of the screw stem 26 counterclock-Wise Will telescope the ink sac, vandmover'nent ina clock-wise direction will retract the same.

The screw element 25, in the present instance the threaded sleeve, has a plug portion 252L disposed. within the inkv sac, and when the smaller portion :20a ofsuch sac is telescoped into itself andthe bore portion i6 of the pen section, this plug portion enters the bore portion l5v of the pen section, substantially to the seat for the renew-poin insert; thereby effecting displacement of substantially all of the air vwithin the ink sac and/or the pen section. Then,'upon dipping the nib end of the fountain pen structure into an ink supply and manipulating the knob 21. in the proper direction-clock-wise in the present instancethe telescoped portion of the ink sac will be retracted and a supply of ink will follow and substantially ll the sac in its fully extended position as Well as the larger bore portion I6 of the pen section. This telescoping of the wall of the ink sac is facilitated bythe fact that its smaller portion a may enter the enlarged bore portion I6 of the pen section without undue friction and under slight force and maybe retracted under similar conditions.

The inner end of the inksac 20 may besecured to the operative element--in this instance, the sleeve -in various ways. As illustrated in Figs. 1 and 2, the reduced end of the sleeve 25 may be annularly grooved atZSb-the portion beyond the groove providing the plug element 25a-and the inner end of the smaller portion 2|la of the ink sac may be apertured so that the wall of the sac surrounding such aperture may be crowded into such groove, as more clearly illustrated in Fig. 3. It'may be desirable to bead the edge of the sac aperture, as indicated at 20; the beaded portion entering the rounded root of the groove 25h. In lieu of this, the end of the sleeve 25 may be further reduced and'threaded, as indicated at 25,.`Fig.andthe plug` element disposed within the -inkfsac may' be'of vnut-'form ()'iittlng the threaded endf259x4 andcapable, with the :use 'of an interposed-washer 3|,iffof crowding the wall edgellof the 'sac aperture whether beadedgor notfagainst the end of the sleeve 25. f n

The threaded sleeve may be provided with a groove at its side, indicated at 35, to'engage a rib 36 formed onthe wall of the shellv or casing I0, or on a sleeve inserted in the'barrel and properly fixed with relation to the same. This insures that the sleeve 25 will move longitudinally only, without rotation. It will be understood, of course, that this mechanism may be reversely arranged so that the sleeve 25 may rotate without longitudinal movement by. connecting the same to the knob 21, with the screw stem 26 connected to the ink sac and arranged to move longitudinally without rotation.y Such modiiied arrangement is within the scope of our invention.

In lieu of the screw mechanism illustrated in Figs. 1 and 2 for eiecting the telescoping of the ink sac, we may employ a spring-supported plunger for such operation; a single stroke of such plunger being effective for the purpose.

One form of plunger mechanism within the scope of our invention is'shown in Figs. 5, 6, et seq., wherein the shell or casing of the writing implement-the fountain pen barrel-is indicated at |00, which may carry the same form of pen section with the pen nib and feed-bar 'assembly as illustrated in Figs. l and 2. The barrel |00 is much shorter than the shell or casing |0 shown in Figs. 1 and `2, and in the present instance it is shown in threaded engagement with a collar sleeve 40, which may be disposed substantially midway the length of the writing implement; such sleeve lcollar having a rearwardly or upwardly extending tubular'portion 14|.

Within v'said sleeve collar a plunger 42 is arranged' for longitudinally reciprocative-v' movement; the forward end of suchplunger being provided with a plug element 43 adapted to' enter the smaller bore portion I5 of the pen section, and the ink sac being attached to such plunger in a manner substantially similarto the attachment with the longitudinally reciprocative member 25 of the screw mechanism,`i1lustrated in Figs. 1 and 2.

'The plunger 42 is provided with an annular shoulder` 42a which abuts the inner end of the collar sleeve 40, and the portion of such plunger within the collar sleeve 40 and its'tubular extension 4| is surrounded by a coiledspring 44. The plunger 42 is preferably tubular, as illustrated, and may be of metal or of any suitable plastic-Celluloid, or the like. Threaded to or otherwise connected with the upper end of the plungerV 42 is an operating stem 45 extending beyond the tubular portion of the collarsleeve 40, indicated 'at 4|, and such stem '45 is prol vided with an annular shoulder or ange 45a against which the upper end of the coiled spring 44 abuts. This mechanism may be enclosed by a cap sleeve 46, following the contour of the fountain pen barrel |00, and such sleeve may be in threaded or frictiorial engagement'with the collar sleeve 40 to which the fountain pen barrel |00 is attached. f

The collar sleeve may have an 'annular flange or shoulder 40alying between the shell o-r casing portion |00 and the cap sleeve 4|,vand substantially ush with their outer surfaces. This ilange 40a .may` be of an ornamental character, andits outer or exposedsurface imay be `'covered-witha precious or send-precious metal ktoenhance :the appearanceof the writing implement. f 1 'r The parts `fof the.v plungermechanismf illustrated in Figs. 5 and 6 are so arranged and proportioned that a single'stroke ofA the stem* will servey to telescope the ink-sac and at'the same time compress the spring 44 to store power for the retraction of the' plunger 42 to the normal position, illustrated in Fig. 5. While we vhave shown in Figs. 5 and 6 a specic plungermechanism for telescoping the ink-sac, we do not wish tobe limited to the same, and other forms of plunger mechanismare within the scope of our invention. f H f In lieu of f the y vconstruction villustrated in Fig. 5 wherein a sleeve'collar 40 is employed Vas a connection for the shell portion |00 and a guide and support for the plunger mechanism as well as a connectiony -for the sleeve cap 46, the shell` or casingor barrel portionmay be constructed as indicated at |||l, Fig. 6.V In this arrangement, the body of the'shell or casing ||0is internally thickened as indicated at 50, with a `rearwardly or upwardly extending portion 5|, tubular` in character, receiving the plunger 42, surrounded by the spring 44. The thickenedv portion 50 may be reduced circumferentially-and threaded at 52 for engagement by the sleeve cap 46, and further vreduced to space the tubular'portion 5| from the-wall of the sleevecap 46 when the lat-r ter is in place. .Y

Itis also within the scope of our vinvention to employ a separate tubular section in 'lieu of the extension 5|, which tubular section maybe of the same material as the shell or casing and which may be in threaded engagement therewith to provide the guide and support the plunger mechanism. f .i

In either or bothfof themodifiedarrangements noted; a metalcollar for' ring maybe inter-- posed-:between ithe :firmer end Lofy uthe Acap f sleeve #6 'zandithe'shell l or casing-the 'pen barrelto give' the writingimplement .anfattractive appearance.

Avfurthermodication'within the scope of our inventionis illustrated ini Fig. 9, wherein we have shown levera'ctuated'mechanismfor operating a plunger.V Inlthis'arrangement we employ'lever means, that is to say, an actuating member substantially; like the well-knownv devices for collapsing' the ink'sacs .of ordinaryfountain pens through the medium `ofa presser-bar. f

.'The`inksacfoflthe structure illustrated in Fig. 9v will be 'ofi substantiallythe same character as those illustrated in the'otherfgures 'of the drawingsandisishown eis-'connected to= a pen section having a `cup-shaped bore portion. To the'iree end of such'sac Vwe may connect va plunger-55 arranged for longitudinal reciprocative movement within the/.shell or'casing of the writing implevment. This plunger maybe guided through a a'flange 55a'a't the'upper end' of the plunger 55, a.

coiled spring 51 'may berarranged, to assist in retra'cting the plunger after it'hasbeen' actuated to? telescope the ink sac.

To impart longitudinal movement tothe plunger-forwardly totelescope' the ink sac and rearwardly to retractthe samewe provide the lever 60 which maybe pivotally '.rnountedat Elin the wall of the shell or "casing of theffountain'pen structure. 'Thislever'is disposed in a reversely arranged position as 'compared withtthe usual levers' offfounta'in pens inthat' it is arranged' to be lifted or moved'toward theA rearor upper end oi the vlfountain 'pento- Voperate the Vplunger 55, instead o`f beingmoveddownwardly or forwardly like the usual lever which serves to-compress an ink sac through'the medium of a presser-bar. The rear orupper end of this lever 60 may be pivotally connectedatli2 to a, link 53, and the lower or forward end 'of this link may be connected at-64 to the'plunger 55. By lifting the lever and giving it a Vfullmovementor tothe` eX- tent yindicate-id'byfthe dotted lines, Fig. 9, the plunger 551will be given a'forward or'downwar'd movement to an extent suicient to telescopethe ink sac into the enlarged bore portion ofthe pen section to the vposition indicated by the dotted Y lines.

`In order that the' link63 may occupy its normal position with respect to thelever connection and its connection-with the plunger55, the latter will be slotted fora short distance at its'upper end, as indicated at'55b, tolallow space` for the movement of said link. It vrmay be Vpossible to avoid this slotting'by employinga curved link, and in the case 'of "fountain penshavingbarrels of small diameter, a. suitable double-link motion may be employed to obtain'the desired stroke.

The operation of the' plunger mechanism shown in Fig.'9,A like that illustrated in Figs. 5 and 6, is4 eiected by a single Stroke. Such single stroke is ofthe same extent as the complete movement of the screw mechanism illustrated'in Figs. 1 and 2, but is much faster. As in the other -forms of structures illustrated in the drawings, the plunger 55 has, at its connection'with the ink sac, aplug portion 55c to enter the intermediate smaller bore portion of .the Ipen section when the ink sac is fully 4telescoped, as indicated by the dotted lines.

Other :forms `of mechanism designed to completely 'telescopetheink `sac Awith respect to the 8 pen sectiont in; alsingle' stroke' are'- withinA the scope of our invention.

In the'several forms 'of our improved lling mechanism; illustrated in'Figs..1, 5, 9, et seq., we have shown the plugportion disposed internally of the inksac' and designed to enter the intermediate bore portion I5 of the pen section-such plug portion being indicated at 25e, Figi; at 43, Fig. 5,'and at 55C, Fig. 9-as a part of or'connected to the reciprocative member; the screw sleeve 25 ofthe structure illustratedA in Fig. l, or the plunger elementsillustrated in Figs. 5 and 9. Such arrangement necessitates an aperture at the smaller or free en'd of-the'ink sac.

It is within the scope of our' invention to provide an ink sac Without this aperture and to mold with the same a plug. portion designed to enter the smaller intermediate bore portion l5 of the pen section, together with an 'external knob or projection for attachment to the reciprocative member of the operating mechanism, and sacs of such type are illustrated in Figs. 10 and 11.

The form of inksaceshown inFig. 10 is of the same general type as those illustrated in the other gures of the drawings with anv internal plug portionl and an external knob'portion, both integral therewith. The sacvis indicated at 20d/having in the present instance a tapering portion Za and a portion 20!)b of larger diameterfor permanentor substantially permanent attachment with the portion I1 of the` pen sectionv and into which and the bore portion I6 of such pen section, the smaller tapered portion-Zmay be telescoped. The internal and Jintegrahplugportion isindicated at'l vand the external: and integral knob or projection is indicated at "H. The element ofthe operativemechanismwith' which this knob isengagedmayhavea socket 'to receive the same, as indicated by dottedllines,'withzvarlateral opening whereby the parts may be readily assembled-in a detachable manner; such form' ofY connection being entirely effectivein yView of the rectilinear movement imparted by the operating mechanism.

.Another-form ofink sacfof the samegeneral type as those shown inthe other gures of drawing is illustrated i'n.- Fig. 11,"which also has'v an internal and integral plugportion "l0 and an external and integral knob or `projection 1l. In this view,` the sacis. indicatedk at 20|, having a portion 20|-a of one diameter, which may be telescoped anda portion 20 Ib of larger diameter which is the partl attached to the portion l'l of the pen section. In all instances the plug portion, whether that illustrated at '10, Figs. lO'vand ll, or those illustrated in the other views of the drawings is designed'to have a .sliding nt With'the intermediate bore portion I5'of'the pen section and its dimension longitudinally of-any ink sac willbe determined by the length of said bore portion.

A further form of inksac within the'scope of our invention is illustrated in Figs. 12, 13 and 14. This form of sac which may be slightly contracted at one end or -may be ofthe -same diameter throughoutVis indicated'at 350;1one end being expanded to t over-'the portion Il of the pen section. Instead of Aproviding this formof ink sac with an internal plug portion to enter'the smaller intermediate bore portion I5 of the pen section when telescoped toward the same, the free end of the ink sac is shaped ,-to provide a socket Sulla to fit over the end of aseparate member 'l5 having more or less the shapefof Va dumb-bell; including a portion 15a to function as the plug portion, a reducedstem 15b, and a vprojection or head 15 at its 'opposite end which enters the 12,5 9 socket 300a in the shaped portionof the inksac, as clearly indicated in Figs. 13 and 14. This member 15 is of relatively hard non-compressible material and cooperates in the attachment of the ing sac to the operating mechanism.

The end of the reciprocative member of th mechanism designed to effect the telescoping'A of the ink sac, which may be the screw mechanism illustrated in Fig. l, or the plungers illustrated in Figs. and 9, is shaped to provide a socket, or may be provided with asocket member 80, such as illustrated in Fig. 15. This vsocket member receives the head or boss I5EL of the member I5 when the latter is enclosedwithin the lsocket`-3lllla of the ink sac; such portion entering the socketl member via the lateral opening 8| Fig. 13 shows the form of thesac and its Vconnectionvvith the pen section in the normalfpositi'on, and Figfli shows the sac in the telescoped condition, with the'plug portion '15e of the member 'l5 entering the smaller intermediate bore portion I5 of the pen section.

In our improved construction, the ink reservoir of the fountain pen includes the space within the ink sac andthe space providedby the larger bore portion Iii of the pen section. When the ink sac is properly telescoped, substantially all of the air within these spaces is displaced and hence they may completely fill with ink upon the retractive movement of the telescopic portion lof the ink sac. The amount of. ink received within this combined space is substantially the same as or more than that received within an ordinary fountain pen ink sac with the advantage that there is practically no air space in our reservoir when the same is initially filled. This condition does not obtain with the ink sacs of ordinary fountain pens whose filling action is effected by a laterally-engaging presser-bar.K

It will be understood that the constructional details herein described and shown in the drawings are for illustrative purposes only and not as limitations, since modifications may be made therein without departing from the spirit of our invention; all of which is deemed to be Withinthe scope of the appended claims.

Weclaim: Y Y,

1. In a fountain pen and in combination with the pen section thereof, an elastic-Walled receptacle normally distended to serve as an ink reservoir having an open end receiving the pen section and a closed endgsaid closed end being capable of telescopic displacement with respect tothe rest of the receptacle'to function as a pumping element.

2. A fountain pen having a pen section with a through bore, in combination with an ink-receiving sac attached to said section; said sac being of such shape that a portion thereof may be telescoped upon itself and into the bore of the pen section.

3. In filling mechanism for writing implements of the fountain pen type, a pen section at one end of said structure having a through bore, an ink sac attached to the pen section and in communication with said through bore; a portion of said ink sac being capable of telescopio displacement upon itself toward and into said bore, and means for effecting telescopic movement of the ink sac.

4. A structure as set forth in claim 3 wherein the means for effecting movement of the ink sac is a plunger which serves to telescope the same upon itself by a direct longitudinal movement in one direction, and means for retracting the 10 plunger and effecting movement of the ink sac in the opposite direction.

5. A structure as set forth in claim 3 wherein the means for effecting movement of the ink sac is a manually operated plunger which serves to telescope the same upon itself by a direct longitudinal movement in one direction, and a. spring for retracting the plunger and effecting movement of the ink sac in the opposite direction.

6. A structure as set forth in claim 3 wherein the means for effecting movement of the ink sac in both directions is a plurality of threaded members in operative engagement; one of said members being connected to the ink sac, and a rotatable knob at the end of the pen barrel for operat- ;ing said screw mechanism.

7. In filling mechanism for writing implements o'f'th'erfountain pen type, a pen section at one 'end of said structure having a through bore with a plurality of bore portions of different diameter longitudinally thereof, an ink sac attached to the inner end of the pen section; a portion of said ink sac being capable of telescopic displacement upon itself and into the innermost bore portion of the pen section, and means for effecting telescopic movement of the ink sac with respect to the pen section.

' 8. A structure as set forth in claim 7 wherein the inksac is associated with a plug portion internally thereof adapted to enter and substantially flll a smaller bore portion of the pen section When said ink sac is telescopically displaced upon itself and into a bore portion of said pen Section.

9. A structure as set forth in claim wherein the ink sac is provided with an integral plug portion'internall'y thereof adapted to enter and substantially ll a smaller bore portion of the pen section when said ink sac is telescopically displaced upon itself and into said pen section. 1( }.In filling mechanism for writing implements of the fountain pen type and in combination `with the pen section of such. structure having a through bore with a plurality of bore portions of different diameter longitudinally thereof, an ink-receiving sac having a portion of one diameter and a portion of another diameter with itsI portion of largestl diameter attached to the pen section externally of its largest bore portion; the smaller portion of the sac being capable of telescopic displacement upon itself and into the innermost bore vportion ofthe pen section, and means 'for -effectingtelescopic movement of vthe 4smaller portion of the sac with respect to said pensection.

11. The combination with the barrel of a fountain pen, of a pen section fitting one end of the same and having a through bore with a plurality of bore portions of different diameters longitudinally thereof; the innermost bore portion being substantially cup-shaped, a pen nib and feed-bar assembly carried by the pen section and in communication with the through bore of the same, an ink-receiving sac in engagement with the pen section and shaped to permit telescopic displacement of one portion with respect to another portion thereof, and means for imparting movement to a portion of the sac in both directions; one of said movements causing said movable portion of the sac to telescope upon itself and into the cupshaped bore portion of the pen section.

12. The combination with the barrel of a fountain pen, of a pen section fitting one end of the same and having a through bore with a plurality of bore portions of different diameters; the innermost bore portion being substantially cup-shaped,

a, pen nib: andfeedebar assembly carried-:bysaid pen section and in communication with its throughbore, an. ink-receiving sac in engagement lvvithgthezpen .section-and shaped toprovide por-v .tions of different diameters whereby the smaller 1 and inner portion may be telescopically displaced Withrespect to thelargerportion enclosing the inner end of the pen section, means for imparting movement to thesmaller .portion of the sac in 'both directions; one of said movements causing .said smaller portionto telescope upon itself and into. the cup-shapedbore'portion of the pen section, and .a plug disposed within said sac and arrangedtoenter thesmallest bore portion of the pen.section;;such vtelescopic displacement of the sac serving to displacexair therefrom preliminary to its receptionoi ink.

.13. The .combinationwvith the barrel of a fountainpen, .of athreadedelement rotatably mounted inv one endofthe. pen barrel and held against v.longitudinalmovement, an externally disposed knob forturning said element, apen sectionrdisposed atthe opposite .end of the barrel, apen nib andfeed-barassembly carried by said penseevtion, a telescopic ink-receivingsac carried by the pen section and having a. portion movable toward and from the same, a complementally threaded member operatively .engaging the rotatable threaded .element .and arranged for reciprocative movement upon turning saidrotatable element; said complementally threaded member being `operatively connected to theinner end of the sac, and .a yplug carried by said vcomplementally threaded member `and disposed within the sac; said pen section having a through bore with portions oi different diameters and said plug portion being adapted to enter the vsmallest bore portion of the same when the sac is collapsed to displace air therefrom.

14. In afountain pen, .the combination with the pen section thereof, a pen nib and feed-bar assembly carried by said pen section, a barrel, and reciprocative .means carried by the barrel, of. an inkreceiving s'ac connected to the pen section and having .a .closed end with a socket formed therein, a headed :member disposed IWithin saidsocket and having avplug portion disposed internally of the sac; said pen section having a through bore with a plurality of .portions of diierent diameters into one of Whichsaid ink sac may be telescoped and an inner bore portion receiving the plugportion of the headed i member; one portion vof v.said headed member Within said socket serving as the meansfor :operlativelyconnecting the rreciprocative means to .the sac.

vl5. In ya fountain pen, a-telescopic ink sac for use therewith;5said sacfbeing closed at one end and having a. socket at its closed end, and a. non-resilientheaded member disposed Within .the ink sac and having a portion fitting said socket; `the end .of said headed member 4enclosed by the socket Wall serving as an attachment for engagement with a member designed to impart telescopic movement .to .said ink sac.

v16. -The combination of a telescopic inkreceiving sac having an external knob or pro `iection at its free end, reciprocating means for teles'coping the. sac having a socketed portion receiving the knob or projectionv of the sac; said .socketed portion having a lateral opening for the passage .of a reduced portion ofthe external knob Aor projection.

17. A pen section for fountain pens having a through .bore with bore portions of diiferent diameters, including an outer boreportion, an intermediate bore portion less in diameter than the outer vbor-'e portion, and an inner bore portion greater in diameter than the intermediate bore portion; said inner bore portion being enclosed by anink-receivng sac.

18. A structure assetforth in claim .17, in combination with a telescopic ink-receiving sac inclosing. theinner bore portion of the pen section and `telescopically displaceable into such bore portion for displacement of air from the .space dened vby the. innerrborel portion and sac.

HENRY-C- KLAGGES. .HARRY C. KOFKE.

REFERENCES CITED The following-'references are of record in the iile of this patent:

UNITED STATES PATENTS Number 'Name Date 335,033 '-Locke Jan.'26, 1886 605,259 Rich June 7, 1893 1,317,817 Ogilvy Oct. 7, l1919 1,398,779 Hayden Nov. 29, .1921 1,469,921 Dutchak Oct. 9, 1923 '1,818,216 Federbusch Aug. 1l, 1931 v1,902,809 Bienenstein 4 Mar. 28, 1933 V1,904,358 Dahlberg Apr. 18, 1933 1,980,508 Tefft Nov. 13, 1934 '1,985,643' 4lfanstiehl Dec. 25, 1934 2,093,701 Zahel f Sept. '21, 1937 "2,108,552 Schoneberger 'Feb. 15, V1938 yp, ma... y., y