US2229749A

US2229749A - Fountain pen

Info

Publication number: US2229749A
Application number: US346042A
Authority: US
Inventors: Frank E Little
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-07-17
Filing date: 1940-07-17
Publication date: 1941-01-28
Anticipated expiration: 1958-01-28

Description

E L T h L E F.

FOUNTAIN PEN Filed Jqly 17, 1940 Patented Jan. 28, 1941 UNITED STATES eATENT orifice ma. y

\ 6 Claims.

This invention relates generally to fountain pens, and particularly to that type of 'fountain 1 even supply of ink to the pen point.

A further object of the invention Ais to provide `a fountain pen of such construction that danger f of over feed of ink to the pen is precluded, and Vwhich has its parts s o constructed and arranged as to entirely eliminate the possibility of clogging of the ink passage or leaking of the ink cartridge. A

A further object of the invention i's to provide a fountain pen `of the character generally stated.

quickly applied to the pen without the exercise of special skill or instruments, and wherein a leak-prooi' ,seal between the cartridge and the pen headis effected.

Further objects reside in the specific construction .of a puncturable closure member for the cartridge, as Well as the specic construction and arrangement of ink and air feed tubes in the pen head for cooperation with the lnkcartridge in the production of afountain pen possessing a high degree ofefilciency and practicability.

With these objects in view, together with others which will appear as the description proceeds,

the invention consists in the novel construction, combination, and arrangement of parts, all as willfbe described more fully hereinafter, illusviewof the reservoir ing, 5 represents a pen barrel of generally cylindrical form, having a removable pen carrying wherein a lled ink cartridge may be easily and trated in the drawing, and particularly pointed (cl. 12a-sz) head l at one end and the usual internally threaded cap 1 to enclose the said head when the pen is not in use. The shape. assemblage, and construction of these parts may take any desired form.

The head 6 is provided, as usual, with a plug t fitting snugly therein and carrying the usual pen point l. In accordance with the present invention, this plug has arranged therein an ink tube or duct Il, one end of which opens beneath 1 and in ink feeding relationship with tle pen point as shown, while the opposite end projects beyond the corresponding end of the plug near the. axis thereof. The projecting end of this tube is angularly formed as shown to provide a sharpened or penetrating point. The plug I also contains an air supply duct or tube Il, which tube is secured within the plug and is provided near its lower end witha port l2 in communication with an air pocket or chamber i3 formed in the plug. This air pocket communicates with the interior of the barrel by` means of a passage Il, and the interior of the barrel is in communication with atmosphere by 25 means of a port or passage il; The projectirig end IC of the air tube is also angularly cut to provide a penetrating point.

The-ink'supply for the pen includes a cartridge l1 of a size and shape to correspond sub- 30 stantially withwthe interior of the barrel and for convenient accommodation therein. This cartridge may be formed of metal, glass, or other desired'materlals, -it being preferred that such materials be transparent in order that the contents may be visible from the exterior. The cartridge is permanently closed at one end, and ,has a puncturable closure at its opposite end. This closure includes a diaphragm or .disc of rubber indicated at II, reinforced preferably by a' cloth o disc il. The rubber and cloth discs may be cemented, vulcanized. or in any other preferred manner permanently secured together, and are of a diameter suilicient toentirely close the otherwise open end of the cartridge. The rubber and cloth discs are securely held upon the open end of the container by a thin metallic cap 20, the edges of which may be crimped around a neck 2| at the emiA of the cartridge. This cap is pro- Vvided with a relatively large central opening 22,' 50 the sizeof ,which is suilicient to permit of the entry of the projecting ends Il and li ofthe ink and air tubes.

Figure 2 of the drawing discloses a slightly modified forni of the invention, wherein the pocket 23 to supply air to the tube Il is located beneath the pen point 9- and obtains its supply of air from around the edges oi' the said point instead of from Vthe interior of the barrel I.

l' This form of the invention includes a rubber gasket 24 interposed between the cartridge and j 'the plug 8, to constitute an additional liquid seal should such be required.

Figure 1 of the drawing shows` a-gasket 25 10 interposed between the closure cap 1 and the head i for sealing purposes, as will be under- 4 stood.

From the foregoing it is apparent that when itis desired to illl the pen for writing purposes.

it is but necessary to apply the proper end of a filled cartridge I1 to the base of the' plug 8 in the manner shown. The central opening 22 of the metal cap will be suillciently large to receive the adjacent tube ends 'I0-IB, in fact this 20 opening 22 will assist the operator in properly centering the cartridge upon the plug. Due to the sharpened ends of the tubes Ill-Il, only n slight pressure will be required to cause penetration of the fabric and rubber diaphragms, whereupon the plug and cartridge are moved together until the cap 20 rests upon the base of the plug. 'Ihe rubber constituting the diaphragm I8 will snugly engage the sides of the tubes IO-IS andleakage will be prevented. In

3 the writing operation, ink` will flow through the s point. The openings within these tubes may be :of such size as will Vpermit an even flow of ink with a minimum of opportunity fox` clogging. Ihe operation of themodiflcation shown in Figure 2 is precisely the same, as air will be sup- 49 plied to the pocket 23 ofthe plug beneath the pen point 9.-

In order to ilrmly hold the reservoir or cartridge I'I within the barrel 5, a pad 26 may be arranged in the closed end of the barrel, against which the end of the cartridge will engage..

From the foregoing it is appar/ent that I have constructed a 'pen which is fully capable of accomplishing the several results set forth. The .size and arrangement of the ink and air passages 50' issuch as to preclude the possibility of overfeed or ooding. The feed of ink throughthe extremely small tube I0 during the writing operation is brought about by capillary attraction.

While the foregoing is a description of the preferred embodiments of the invention, it is obvious that variations in the construction and arrangement of parts may be resorted to without departing from the spirit of invention as dened by the claims. Q `Having thus described my invention, what I claim as new and useful is: l. In a fountain pen, a, head, a pen carried by said head, an ink holder, a puncturable closure I for said hOldel', an lnk tube in Bald head conimunicating at one end with said pen and having its opposite end projecting beyond said head, an air vent comprising a tube secured in said head and having an end projecting beyond the latter, the projecting ends of said air and ink tubes adopted to penetrate said ink holder closure.

2. In a fountain pen, a head, a pen carried4 by said head, an ink tube in said head communi-l cating at one end with said pen and projecting at its opposite end beyond said head, an air tube in said head projecting at oneend beyond the latter, the opposite end of said air tube in communication with the atmosphere, and an ink holder having an end closed by a diaphragm through which said tube ends are adapted to pass.

3. In a fountain pen, a head, a pen carried by said head, an ink tube in said head, said tube communicating at one end with said pen and projecting at its opposite end beyond said head, an air tube in said head having one end communicating vwith atmosphere and its -opposite end projecting beyond said head adjacent to said linl: tube end, an ink holder, and a puncturable diaphragm closing one end of said holder and adapted to be penetrated by said air and ink tube ends."

4. In a fountain pen,a stock, a pen plug engaged in said stock, an ink tube extending through said plug and communicating at one end with said pen, thev opposite end of said ink tube projecting beyond the end of said plug, said plug having anair passage, an air tube in said plug having one end communicating with\said passage and its opposite end projecting beyond said plug adjacent to and parallel to said ink tube end, an ink holder having` an end closed by a puncttirable diaphragm, said diaphragm adapted to be penetrated by said air and ink tube ends. and a barrel enclosing said holder.

5. In a.y fountain pen, a head, ink and air tubes projecting beyond one endof said head in spaced parallel relation and substantially in the axis of said head, an ink holder having one end permanently closed, a puncturable diaphragm closingA the opposite endof said holder, and a centrally apertured metal cap holding said diaphragm securely upon said ink holder,'said aperture of a size to receive the said air and ink tube ends.

, 6. In a fountain pen, a head, a pen carried by said head, an ink tube extending through said head, one end of said tube communicating. with said pen and projecting at its opposite end beyond said head, said head having an air chamber disposedbeneath said pen, ank air tube in said head communicating at one end with said chamber and projecting at its opposite end beyond said head, and an ink cartridge having an end closed by a puncturable diaphragm adapted to receive FRANKE.LI'1'I'LE.