US2187160A - Fountain pen - Google Patents

Description

Jan. 16, 1940. l.. KOHLER ET AL 2,187,150

FOUNTAIN PEN Filed sept. 10,j 1938 TQQ., l2&3-

flat in such a manner as to prevent filling due 2&5 centrally at the top thereof. The throat mem- Patented Jan. 16, 1946 r Y* i y f ,i z I UNITED @STATES PATENT oFFiCE FOUNTAIN PEN Laura Kohler and Arthur Kohler, Chicago, Ill.

Application September 10,1938, Serial No. 229,363

9 claims. (erizo- 4u This invention relates to fountain pens and internally screw threaded portion of the open the object thereof is to provide a novel construclower end of the outer barrel as shown at I9. tion of fountain pen and filling device therefor .The reduced threadedy portion of the s'pudV I8 which eliminates the usual rubber sack asian ink produces an upwardly facing annular shoulder 6 containing reservoir and also lateralcompression A2t which abuts the lower end of the outer bar. or flattening thereof in filling the ink chamber rel. A throat member 2l isformed at the lower `of the pen, thereby eliminating an objectionable portion of the spud which latter has an upwardly feature which usually quickly renders the sack facing annular shoulder 22 at the top formed and pen useless by causing the sack to remain Aby a reduced portion 23 with a tapered recess lo to its deflated condition and renders the same vber has a central opening or bore 25 receiving incapable of expanding and drawing in ink so a pen pointfor nib'26rwhich is held in position that the pen is rendered useless.` by a plug 2l having a feed bar 28 provided with Another object of the invention is to provide a feed channel 29 adjacent the point. A pasl 15 means for protecting working parts of the device sage or duct 30 extends up through' the spud in 15 generally from contact with the ink, and to prop line with the channel 29 to the ink chamber Il. vide a novel arrangement of vents and passages Air vents 3| are provided between the inner and to facilitate filling with increased capacity as outer barrels, the same being formed by groovwell as to provide an actuating cap which is held ing the inner barrel longitudinally with parallel v 90 down during the normal use of the pen or when -semicircular grooves 3| shown equidistantly the ink chamber or reservoir is filled, and which spaced apart around its periphery and running is in a raised position when .disconnected for de-v the length thereof for communicationv with an pression thereof in lling the ink chamber with annular channel 32A at the bottom. Two ducts ink. 33 extending longitudinally of the spud and 26 Other objects and advantages will become a'pthroat portion are placed in communication with 25 parent and be brought out more vfully in the folthe air vents 3l at diametrically opposite sides lowing specification, wherein: through the medium of curved portions v36, shownv e Fig. 1 is asectional elevation of a fountain pen more particularly in Fig. 8 of the drawing and in accordance with the invention `with'the llhaving outlet air ducts 35 extending to thek 3 l ing cap raised; A lower end of the throat member.

' Fig. 2y is an enlarged fragmentary sectional A piston 36 operates in the cylindrical chamview of the upper portion of the pen with the ber ofthe inner barrel I6 near the top thereof parts in the same position as shown: in Fig. 1;l and has a sleeve portion 3l with a plurality of Fig. 3 is a view similar to Fig. 2 but showing peripheral grooves receiving packing vrings v38" 35 Ithefilling cap partly depressed in the actof fill'- preferably three in number so as to form -a seal 35 ing the pen" y I Y f at this point. The head of the piston is pro- Fig. 4 is a similar viewshowing the cap held vided with a' tapered passage 39 forming a valve down on the barrel of the pen `after the filling' seat with which cooperates a tapered headed has `been* completed;

valve '40 carrying'a welght 4I on the depending 40 Figs. 5 and 6 are sectional views taken'on the sterny thereof normallyk closing the valve. The v40 lines 55'and 6-6 of Fig. 2; A sleeve 3l which extends upwardly from the head Figs. '7 and 8 are enlarged sectional views of the piston has a pair of diametrically opposed taken on the lines 'I-l and 8-8of Fig. 1; internal arcuate recesses ,42 communicating with y 9 is affragmentary:elevation of the upper longitudinal passages 43 similarly relatedv and portionof the pen; and extending up through the wall of the sleeve to 1:5y

Fig. 10 is a fragmentary vertical sectional view the top end thereof for communication with a of the lower v.portion of the pen and pen point chamber' 4 above 'the upper end of the inner at'right angles to Fig. 1. y l I barrel and within the outer barrel. A reduced n Referring morer particularly to the drawing, externally threaded portion 45 of a removable `the-pen is shown as comprising an outer barrel tubular upper part 463 of the barrel has threaded 50,

' I5 and an inner barrel I6 having an ink chamengagement with internal threads at the upper ber or reservoir Il, the inner barrel snugly tend of the outer barrel I5 as shown at lll. A ting the outer barrel. The lower end of the outpiston .including a head 48 is positioned within er barrel receives a spud I8, Vthe latter having the sleeve `31 of the piston 36 and receives in a an externally screw threaded portiontting .an central bore at the top thereof, the lower sec- 55 tion 49 of a plunger rod having an enlargement or piston 5U at the top formed with a tapered recess 5l in the upper end thereof and producing a shoulder beneath. A tapered enlargement 52 is formed at the lower end of the upper section or shank 53 of the plunger rod and a cap 54 preferably knurled as shown in Figs. 1 and 9 is secured or fixed on the upper end of the section 53 and is counterbored at the bottom and provided with a small inwardly extending lug 55 adjacent its bottom edge. A reduced part 56 of the removable upper part 46 of the barrel forms an annular rib at the top by reason of an annular groove 51 spaced from the upper end thereof and this rib has a longitudinal slot 58 communicating with the groove 51 designed to receive the lug 55 for the purpose of holding the cap down on the barrel or releasingthe same to be elevated in spaced relation thereto for lling the pen as will be further described. A flexible soft rubber sack 59 receives the piston head 48 and rits in a reduced bore 6U of the part 46 at the upper end of the latter and over a tubular part 6l of a hard rubber or metallic sleeve 62 having a thickened wall at the top received within an enlarged counterbore of the section 46 immediately above the reduced bore portion 60 and seating on an internal upwardly facing annular shoulder 53 produced thereby. The sleeve 62 has an annular groove 64 within the bore portion 60 and this peripheral groove receives the wall of the soft rubber sack or protector 59 which is depressed into the groove through the instrumentality of a contractile spring ring or retainer 65 which seats in a groove and securely connects the sack to the tubular part 6| of the sleeve 62. The sleeve serves to permit stretching of the sack thereover and has an apertured bottom 66 receiving the lower section 49 of the plunger rod therethrough for connection to the piston 48 and serves as a holder for a spring 61, the lower end of which seats on a brass or like packing ring 68 and the upper end of which correspondingly seats on an upper packing ring 69. The lower packing ring is disposed against the bottom 66 and the upper packing ring against the bottom shoulder of the enlargement 50 so that the spring normally tends to raise the plunger and cap. These parts are held from displacement entirely by means of a retaining ring 10 fitted in the internal, bore of the sleeve 62 and snugly receiving the plunger rod 53 therethrough although any air which may be within the sleeve 6| and the sack 59 may escape between the bore of the sleeve and the parts 50, 52 and 10 so as to vent the interior of air and therefore eliminate a dash pot or cushion.

In the operation of the device in filling the ink chamber, the cap 54 is turned in the groove 51 beneath the rib 56 until the lug 55 is beneath the slot or groove 58 whereupon the cap will be elevated assisted by the tension of the spring 61 expanding and forcing upwardly on the piston 48 against the shoulder at the bottom of the enlargement 50 of the plunger and consequently elevating the enlargement 52 beneath the ring 1D so that the cap will be in the positions shown in the Figs. l, 2 and 9 of the drawing. This, of course, will permit the sack 59 to contract and the piston 36 and its sleeve 31 Will be upwardly displaced within the bore of the inner barrel I6 forming the ink chamber or reservoir l1. The pen is then inserted in the well of ink and by forcing downwardly on the cap to the position shown in Fig. 3 and stretching the sack or protector 59, the piston 36 will also be forced downwardly to compress the spring 61 and the air beneath the piston 36 which will unseat the valve 4U and permit the air to escape through the passage 39, passages 43 and through chamber 44 and air vents 3| to the annular channel 32 and openings 34 from the passages 33 and out through the outlet air ducts 35. During this time, ink will pass up through the feed channel 29 and passage 30 to the ink chamber or reservoir I1 so as to expel all air from the latter and sucient displacement is provided to permit the ink to pass into the passages 43 and 3l although this is not preferred. By further downward pressure on the cap, the spring 61 will be compressed further as shown in Fig. 4 and to further distend the sack 59, whereupon the lug 55 may be passed through the groove 58 and beneath the annular shoulder formed by the groove 51 beneath the portion 56 constituting an annular ribrperipherally around the reducing upper portion of the sack 46, thus holding the cap down against the top of said sack 46. Upon emptying of the ink in the chamber, the cap may be disconnected and will be elevated by the spring 61 upon the lug 55 aligning with the groove 58 so that the filling operation may be simply and effectively accomplished. Of course, the valve 40 will normally return to a closed position when the pressure of the air within has been released by the displacement thereof and the piston 36 will give a large area of displacement with a short stroke within the bore of the inner barrel i6 while the sack Will prevent the ink from escaping through the top portion of the pen and leaking at this point. At the same time, the parts are such that they can be easily and economically produced and readily assembled in the complete structure at a minimum of cost.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, these are capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such Variations and modifications as come within the scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is:

l. In a fountain pen, a barrel having an ink chamber, means for lling said chamber including a piston operating in the ink chamber, a. plunger operating in the piston, a sack anchored to the barrel and extending between the piston and plunger for expansion or retraction by the plunger, and means for sealing the latter means and closing off the same includingsaid sack and a rigid sleeve in the sack and anchored to the barrel.

2. In a fountain pen, a barrel having an ink chamber and a filling opening, pistons for lling the chamber, and means forpermitting movement of the pistons in lling the chamber and cutting off the passage of ink past the pistons, said pistons being positioned on opposite sides of the last named means.

3. A fountain pen comprising a barrel having an ink chamber, an inlet for ink leading into the chamber and air vents for discharging air from the chamber upon being displaced by ink, a plunger movable in the chamber to draw ink into the latter and expel the air therefrom, a.

f `an ink chamber, an ink inlet and air vents for air, displaced by the ink entering the chamber,

a plunger movable in the chamber, a valve in said plunger, an extensible sack Within the barrel and extending into the plunger, anda second plunger movable in the sack.

5. A fountain pen comprising a barrel having an ink chamber, an ink inlet and air vents for air displaced by the ink entering the chamber, y

a plunger movable in .the chamber, a Valve in said plunger, an extensible sack Within the barrel and extending intofthe plunger, a second plunger mounted within one end of the sack and movable to expand the same, said second plunger being mounted in the ilrst plunger for actuating the same, and means for holding the second plunger in an extended position.

6. A fountain pencomprising a barrel havingan ink chamber, an ink inlet and air vents for air displaced by the ink entering the chamber, a plunger movable in the chamber, a Valve in said plunger, an extensible sack within the barrel and extending into the plunger, a second plunger mounted Within one end of the sack and movable to expand the same, said second plunger being mounted in the rst plunger for actuating the same, said valve being Weighted, said second v plunger being separated from the interior of the barrel by the sack, a cap on the second plunger, and means for connecting the sack to the barrel.

7. A fountain pen ycomprising a barrel having an ink chamber, an ink inlet and air vents for air displaced by the ink entering vthe chamber, a plunger movable in the chamber, a valve in said plunger, an extensible sack withinthe barrel and extending into the plunger, a secondl plunger mounted Within one end of the sack and' movable -to expand the same, said second plunger being mounted in the rst plunger for actuating the same, said valve being Weighted, said second plunger being separated from the interior of the barrel by the sack, a cap on the second plunger, means for connecting the sack to the barrel, said second plunger comprising sections, a spring holder Within the sack, and a sprin-g in the holder and acting on the second plunger to project theV same from. the barrel, and means to prevent displacement of the second plunger.

8. A fountain pen comprising inner and outer barrels with air vents therebetween, a point holding member held in the outer barrel against the inner barrel, said member having an ink feed channel leading into vthe inner barrel and air ducts leading to the vents, a sleeved piston movable in the upper portion of the inner barrel and havin-g air passages between the inner barrel and said vents and a passage having a seat, a Weighted valve normally closing said seat, a stretchable sack in the piston and anchored in the barrel, a two part plunger having a head in the sack within, the piston, a rigid sleeve held in the outer barrel and receiving the plunger through its lower end Within thesack, a spring in the sleeve normally holding the plunger projected from the outer barrel, and means coacting vbetr/veen the plunger and outer barrel to hold the plunger down.

9. A fountain pen comprising a barrel having an ink chamber, an inlet for ink leading into the chamber and air vents for discharging air from the chamber upon being displaced by ink, a plunger movable in the chamber to draw ink into the latter and expel the air therefrom, a sack mounted in the barrel and stretchable during the movements of the plunger, said sack' sealing the interior of the chamber from. the exterior, a tubular member closing the top of the barrel, a second plunger movable in the barrel and tubular member Within the sack, a cap having a shank with an enlargement held from displacement With respect to the barrel, and means for securing said cap to the barrel.

LAURA KOI-ILER.

ARTHUR KOHLER.

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