US1633896A - Fountain pen - Google Patents

Description

June 28 1927.

T. KOVACS FOUNTAIN PEN Filed June 16. 1924 Inventor:

Ion

Patented June 28, 1927.

PATENT ,OFFICE.

THEODOB novice, or mam, ITALY.

roun'ram ran.

Application filed June 18, 1924;, Serial No. 720,480, and in Germany July 17, 1998.

There exist already fountain pens which can be filled without unscrewing of the head, but a difficulty experienced with fountain pens of this kind resides in conducting away the air displaced by the ink when the reser voir of the fountain pen is being filled. The air-discharge channel must be sufiiciently wide in order to permit the air-bubbles to pass therethrough. With most fountainpens of that kind the air-discharge channel must' be closed when the filling of the reservoiris finished, but this solution of the problem conditions a complicated construction of the fountain-pen.

It has also been proposed to leave the airdischarge channel openafter the filling of the reservoir of the fountain-pen, but then that channel is arranged in the head of the fountain-pen, at the inner side of the writing pen proper, whereas the passage for sup-' plying the latter with ink is arranged at the outer side of the pen proper. But as the outer orifice of the air-discharge channel lies remote from the point or tip of the pen proper and is not closed after the filling of the reservoir, it must be comparatively narrower in order to prevent an excessive entrance of air while the writing is going on. The narrow outer orifice of said channel is located in the height of the filling opening, and can, therefore, be closed easlly by the ink when the filling takes place.

Now, according to my invention, the-airdischarge channel is arranged opposite the lower side of the writing'pen proper at the upper side of the ink feeding member together with the ink-supply passage or grooves, whereas the filling-channel is ar'.

ranged at the lower side of the said member. Owing to this arrangement and configuration of said member'which is inserted into the pen-end of the fountain-pen, the airdischarge channel can extend to the point or tip of the pen proper where it terminates with a comparatively wide orifice and is closed automatically by the excess of the ink present at that place while the fountain pen isbeing' used. In the height of the filling channel the sectional area or Width of tlie air-discharge channel is such that it canndt be closed by the ink entering into it.

My invention is illustrated by way of example in the accompanying drawing in which Fig. 1 shows an axial section through the upper part of the fountain-pen, and

Fig. 2 is a cross-section in line 2-2 of Flg. 1;

On the drawing, H is the hollow body or handle of the fountain-pen,'F the writ1ng-' pen proper, and T the ink feeding member lnserted into the body or handle H. The shape of this inserted member in longitudinal direction and in cross-section appears from the'figures. On the en-side the member T is provided with a on itudinal chan-.

nel K which forms the air-*ischarge channel, and on the bottom of this latter are grooves R forming capillary furrows by which the ink is conducted to the pen F, as indicated by the arrow D'. On the opposite or lower side the member T is so sha ed as to form a channel M which is the fil ing I channel, the communication with the reservoir S being established by two narrow grooves Q, forming cross channels provided in the circumferential surfaces of said memher. The sectional area of these circumferential grooves may be larger than that of axial grooves or passages without their permitting the entrance of air into the reservoir through them if filled with ink. The supplemental air finds access into the reservoir S ivliicle the writing solely through the channe 7 With a fountain-pen devised as shown and described it is possible to fill the reservolv S throu h the passage M provided exclusively for t is purpose as indicated by the arrow A, whereas the displaced air escapes in the direction of the arrow B through the channel K also serving for the entrance of supplemental air into the reservoir S while writing as indicated by the arrow 0.

Any amount of ink that may have found I access into the closing cap V screwed on the body H by means of the thread U can be caused to flow .back into the reservoir by the owner holding the fountain pen in upright position before the closing cap is unscrewed whereby increased security against soiling I claim: I A fountain pen, comprising, in combination, an ink receptacle and a feed immovably located therein and extending from the open end thereof to'below the pen, said insert having in its upper side an air-channel having so wide that it is unable to retain ink when capillary grooves in its bottom, and in its the fountain pen is in practioally'vertieal 0 lower side an ink filling ehannel communiposition, substantially and for the purpose eating constantly with said ink receptacle, set forth.

this communication being at least partly so In testimony whereof I have aflixed my narrow as to be adapted to prevent the passignature.

sage of air therethrough if closed by ink,the 4 first mentioned air-channel being however, THEODOR KOVACS.

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