US2621628A - Fountain pen - Google Patents

Description

Dec. 16, 1952 A. G. RosA 2,621,528

' FOUNTAIN PEN Filed April 26, 1948 I 2 SHEETS- SHEET 1 INVENTOR ATTOR Dec. 16, 1952 A. G. ROSA 2,621,628

- FOUNTAIN PEN Filed April 26, 1948 2 SHEETS-SHEET 2 un N N N N N N 20/ i s 22 g 22 NK N `V 1 N! l NN N I" `g N l Y N I N *i N 2/ 1' i *l l *l N *i ,N y

24 Il INVENTOR Patented Dec. 16, 1952 n UNITED STATES PATENT opp-ICE" Anthony G. Rosa, Lyndhurst, N. J.

Application April 26, 1948, Serial No. 23,247

This invention relates to fountain pens, and more especially' to improvements in fountain pens ofthe type in which the writing uid itself is produced in situ.

An .object of this invention is to provide an improved fountain pen which will produce writing fluid immediately, not only within the writing fluid chamber thereof, but also at the pen point so that the fountain pen can be satisfactorily used immediately for its intended writing purpose, Withoutthe annoyance of i'lrst having Water or other unsatisfactory Writing fluid emerge.

Another object of this invention is to provide an improved fountain pen of the aforementioned type having a novel arrangement of parts for the quick and efficient formation of writing fluid of the desired characteristics.

A further object of my present invention is to provide an improved fountain pen which carries suflicient ink-forming material so that it has to be relled only very infrequently and then by a simple and convenient method employing a special rell device.

Other objects of this invention will become apparent from the following detailed description 6 Claims. (Cl. 120-4215) taken in connection with the accompanying draw- A ings, which form a part hereof and in which like characters designate corresponding parts throughout.

In the drawings:

Fig. 1 is a longitudinal sectional view of a preferred embodiment of my invention;

Fig. 2 is an elevation of the feed and applicator of Fig. 1;

Fig. 3 is a cross-section taken along the line 3-3 of Fig. 2;

Fig. 4 is a cross-section taken along the line 4-4 of Fig. 2; Y,

Fig. 5 is an enlarged view of the plunger, support bushing and cylinder shown in Fig. 1;

Fig. 6 is a part cross-section and part elevation of the cylinder of Figs. 1 and 5;

Fig. 7 is a broken longitudinal section of the lower portion of the cylinder of Figs. l, 5 and 6, modified; and

Fig. 8 is a view, partly in section and partly in elevation, showing the arrangement of certain parts `during the ink paste filling and re-iilling operations.

Referring to the drawings, I5 isthe barrel of my fountain pen. At its upper end it is rigidly attached to support bushing I6 and at its lower end the barrel is attached to pen section I'I.

While other suitable means for attaching the barrel to I6 and I'I may be employed, I prefer to use the threaded' means shown in Fig. 1.

A removable cap I8 is attached, preferably by the .threaded means shown in Fig. 1, to the upper mariti/nf the bushing I6. Under cap I8 is an ex- 'Jternuavlly-threaded plug I9 which engages with the internally-threaded cartridge vplunger 20.

Disposed around the lower portion of plunger 20' is an envelope or cylinder 2| the upper part of which is securely but removably attached to bushing I6 by means of tie ring 22. The lower part of cylinder 2l has a piston-like portion 23 provided with annular grooves 24 (see Fig. 6)

and with an opening 25 (see Fig. 5). The chamber 25a serves as the ink paste container.

Disposed withinvopening 25 is the top part of applicator 26. `'The lower part of applicator 26 is rigidly but removably attached to pen feed 21, either by suitable pin means (not shown) or by reason of having the cooperating parts of the proper size.

Applicator 26 has a longitudinal internal channel 28 and annular grooves 29 (see Figs. 2 and 3). Operatively linking said channel and grooves are transverse conduits 3l]y (Fig. 3) terminating in port openings 3|.v l

Channel 28 of the applicator andduct 32 of the feed are disposed so as to form a unitary duct, terminating at its lower end in opening or notch 33.r A'feed channel 34 having capillary grooves 35 (Fig. 4) is also provided, in the usual manner, as is also pen point 3B. The writing fluid is formed in chamber 31, which acts'also as the reservoir for the writing fluid.

The operation of my improved fountain pen will now be described. It is assumed that at the A outset the arrangement of parts is as shown in Fig. 1.

Cap I8 is rst unscrewed from bushing I6;Vv Plug I9 will thereby be exposed to view and can be unscrewed. A container 38 (Fig. 8) having an externally-threaded neck portion and provided also with a screw cap (not shown) and containing ink paste is operatively attached to plunger 20 by the threaded means shown. The ink paste is squeezed out of the container and forced into the ink paste chamber 25a, which can conveniently be made of Va size adequate to hold a supply of ink paste which will last for several months, and even for years. After the contents of container 38 have been emptied into the chamber 25a, the

container is removed and replaced by plug I9.

The pen point may then be immersed into waterv and downwardr pressure is applied on the plug I9. This forces plunger 20 downward and the plunger causes cylinder 2|, which is secured near its top by-tie ring 22, and which is.

the paste goes through conduits 30 into duct 28.

If desired, instead of immersing the pen point in water at the outset as above indicated, the pen point may be immersed in water at this point.

When the downward pressure on plug I9 is released the resiliency of the rubber or other iiexible material from which cylinder 2l is made causes the cylinder to be raised rapidly. Chamber 31 is thereby substantially evacuated of.

air and consequently water immediately flows through aperture 33, up duct 32 and channel'28, and then via conduits out of water ports"`3| into ink forming chamber 31. The ink paste which was contained in grooves 29 is immediately diluted and Writing fluid of the correct characteristics is formed. Because of the presence in channel 28 of some ink paste at the start ofthe upward motion of cylinder 2 l, writingfiuid forms in the channel, and the pen can be used immediately for' writing purposes. vFeed 'channel' Sliv centration of the ink paste, vand can easily be 1 determined in any given case.

The use of a flexible cylinder in combination with a rigid, movable plunger and tie ring is not restricted to an ink-forming fountain pen as herein described, but in modified form applies to the regular type of known fountain pens. Fig. 7 shows the construction of part of such a modified cylinder which could be so employed. It is noted that there is no opening (as in 25 of Fig. 5) herein.

AsV will be understood by those skilled in the art the purposes of this invention can be at tained by the use of various materials. That is to say, this invention is not to be limited to the use of any particular material or materials of construction, unless otherwise specically provided herein. Merely by way of illustration and not for purposes of limitation I may mention the following as preferred materials for the parts in* dicated: hard rubber or cellulose acetate for the barrel and cap; gold for the pen point; hard rubber-'for the feedand pen section; polymethacrylate (Lucite) for the applicator; rubber for the cylinder; brass for the cartridge plunger; and brass for the plug.

While this invention has been describedin detail in order to enable those skilled in the art clearlyA to-understand it, it will be understood thatall modifications that do not depart froml the spirit of this invention are intendedtobe secured herein if they come within thescope-of the" appended claims. Thus,while theinvention lhas been-described. with specialv relation Ato the common type oi". fountainpens, it isnot t'o'be limited thereto, asit is also applicable to' other fountain pen4 types such as ball point pens', as well as per--4 fume dispensers, e. g., of the' ball point-type.

I claim:

1. A fountain pen suitable for the rapid production of writing iiuid in situ, whichcomprises the combination of a pen barrel, a hollow plunger movable within said barrel, a resilient cylinderlike member having its rear end fixed to sai barrela-nd having a smallcentral opening at its antrirend and` being longitudinally stretchable over said plunger, a tube-like :applicator closed at one end, which end snugly fits into said central opening, said applicator having at least one annular circumferential groove forretainfing ink paste, said' barrel having. therein ani ink-forming and retaining reservoir anterior of said cylinderlike member, and a pen feed engaging the lower part of said applicator, said feed and said applicator having a conduit therein.

2; The.. combination of claim 1, wherein one opening of said conduit terminates at said annular grooves.

3. Afountain pen suitable for the rapid production of writing fluid in situ, which comprises the combination of a pen'barrel, a hollow plunger movable with-in said barrel, a iiexiblecylinder operativelyV engaging with saidplunger'and 1011+ gitudinally stretchable thereover, said.cylin'de1" having its rear end xed to said barrel.` and have ing annular recesses at'its anterior'end. and a small central opening therein', a tubeL-likea'pplicator closed at one end, which en'd snugly fits. into said central opening, said applicator having.

and' said `applicator having a conduit extending1V therethrough and havingan 'opening into. said` reservoir.

4. rThe combination of `cl=aim. 3`, 4wherfeinthe top fof the conduit terminates at sai-d'arinular grooves. y i

5. The combination in av twocliambered`foun tain Apen suitable for the "rapid production or`v writing fluid in situ, whichcomprises a Apiston` septum between the chambers, said septum .having a small central opening therein, a tubelike applicator closed at one end, which end' snuglyH fits into said central opening, said applicator having at least one annulargroove therein, and a pen feed having `a longitudinal'circumferential channel and operatively engagingl the l'ower..part of said applicator, said feed and said applicator' having faconduit` extend'ingrrintleriorly' through part of said applicator and part of'said feed, said conduit having one opening insaidchannel of said feed and another opening externallyof the applicator.

6. The combination of claim 5, in which" the other opening ofthel conduit is' insaidarnular grooves. y

ANTHONY G. ROSA.

REFERENCES CITED" Y The following. references; arefofil record in tlie file of this patent:

UNITED STATES PATENTS

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