US2249961A - Fountain pen - Google Patents

Description

July 22, 1941. M KALMAN FOUNTAIN PEN Filed Feb. 17. 1939 7,1m W., w (wf/m. 4M M patented July 22, 19.41

Application February '17, 1936, sei-u1 No. 256,879 i In Austria February 25, 1938 1 e claims. (ci. izo- 46) This invention relates. to fountain pens and more particularly to fountain pens of that type in which the ink is drawn in at the rear end of thebarrel during the filling operation, a filling.

tube open at both extremities being so arranged in the barrel as to extend from the perforated rear end wall to the forward end of the barrel.

One 'object of the invention is to provide a fountain pen of the type specied above in which the'barrel or reservoir is of thoroughly rigid or inextensibie construction and contains no constructional parts other than the filling tube mentioned above or its equivalent;

Another' object of my Ainvention is to facilitate the production of a partial vacuum in the barrel for the purpose of lling.

A further object of my invention is to provide, for the filling operation, an easily operated and reliable suction device outside the barrel but within the conventional components of a fountain pen. I

Still another object of the invention is to emciently prohibit leaking in the applied position of the protective cap.

l attained all these objects and several other advantages by the cooperative combination with a filling tube as specified above of suction producing means adapted to be airtightly fitted upon or around the forward or nib end of the fountain pen so as to communicate with and suck from or throughthe ink passage through which ink flows to the nib when writing.

A preferred form of my invention is illustrated in the accompanying drawing in which- Fig. l is an enlarged longitudinal section of my whole fountain pen with the protective cap applied to the forward end of the pen; y

Fig. 2 is a side View ofthe cap, the barrel bein broken away;

Fig. 3 shows a portion of the suction device in plan view.

In the embodiment of my invention shown in the drawing, the barrel 4 is provided with a known filling tube 5 open at both extremities and so arranged within the barrel as to extend from thereax extremity almost to the forward end of the barrel. The rear end wall 30 of the barrel being thus perforated, a cap 6 may be screwed sage'of ink from the barrel to. the nib of the pen In the protective cap I0 adapted to be screwed on the forward end of the fountain pen, suction producing means are so arranged as to airtigitly join the forward end of the fountain pen when the cap I0 is screwed on. A shorttube II is screwed with its ange 26 into, or otherwise secured in, the cap I0, its end face, adjoining the forward end of the fountain pen being provided with a gasket I2. A short piece of hose I3 is airtightly tted with one end upon the tube II, the other end ofthe hose being stoppered by adisk I4. interposed between a ange 21 of this disk and the ange 26 of tube Il is a helical spring I5 which surrounds and tends to extend the hose I3 in its longitudinal direction. On a short peg I6 projecting from the center of the disk I6 a second disk il, Fig. 3, is stuck from which two nger-pieces It project outwards anddownwards through opposite longitudinal slots I9 in the cap I Il. These slots continue downwards in the form of grooves 2@ and serve as guidings in which the finger-pieces i8 may slide. When the fingerpieces are pushed down into their lowest positions shown by dots-and-dashes in Fig. 2, the

disk I1 integral with them carries with itself the disk I4 secured to hose I3 so that spring I5 and hose I3 are compressed, and when spring I5 is allowed to expand it returns both disks and the i finger-pieces into their highest positions shown in Fig. l so that hose I3 is extended. Thus, pro-- vided that cap 6 has been removed' from the lower or rear end of the barrel so that air may escape through tube 5 during the downward stroke, the hose acts as a sucker in the upward stroke. Lugs 22 downwardly projecting from a ring 2I embracing the upper edge of the cylindrical portion of cap I0 cover the upper ends of slots I9 and limit the upward stroke of finger-pieces I8. The

^ top portion 23 of cap I0 may be screwed off when the several parts of the suction device are to be introduced or exchanged.

To ill the barrel with ink, the rear cap 6 is screwed 0R and the pen with the protective cap I0 screwed on is so held between two fingers of one hand that these rest on the 'finger-pieces I8.

upon the reduced end of the barrel, and tight The rear end of the pen is now dipped in an ink well and the suction device is actuated by moving the finger-pieces down and up. The ink sucked in during every upward stroke ows from the upper end of the lling tube 5 down into the lower portion of the barrel where it remains trapped until the barrel is lled up to the level of the upper extremity of the tube 5.

and the forward end of the pen insures at thesame time against leaking when the pen is carried in the pocket.

It will be understood that the invention is susceptible of considera-ble variation in the ,construction shown and described. Thus, for example. the filling tube need not occupy an axial position in the barrel, and a narrow ink duct extending along the inner -wall of the barrel and open at its ends only may be substituted for tube 5. The 'suction device may be of any suitable construction provided that it is adapted to be tted upon or around the forward or nib end of the fountain pen to suck out air from the barrel through the duct or passage feeding ink from the barrel to the pen proper.

I am aware that it has already been proposed to arrange in the protective cap a suction device adapted to suck air from the barrel through the ink passage through which ink flows to the nib when writing, and I do not claim broadly the arrangement of suction producingv means in a protective cap for any fountain pen but what I claim is:

1. -In a fountain pen, a protective cap, and suction producing means arranged in said cap and comprising a rigid suction-tube secured within said cap, a peripheral flange on said tube, a hose airtightly fitted with one end upon said tube, a rigid stopper airtightly closing the other end of said hose and having a peripheral flange, a helical spring inserted between'said two flanges and surrounding and tending to extend said hose, and means for reciprocating said stopper in the longitudinal direction of said hose.

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2. In a fountain pen, a protective cap with op-- posite longitudinal slots in its side walls, and suction producing means arranged within said cap and comprising a rigid suction-tube secured ein said cap, a peripheral flange on said tube, a flexible hose airtightly fitted with one end upon said tube, a rigid closing member in the other end of said hose, a peripheral flange on said closing member, a coil spring inserted between said two flanges and surroundingand tending to extend said hose, and two finger-pieces connected to said closing member and projecting outwardly through said slots, said slots forming guidings for said finger-pieces in their reciprocatory movements.

3. In a fountain pen, a barrel having a perforated rear end wall, a filling tube extending from the outer face of said endwall to a point within said barrel near the forward end thereof, a pen holder closing the forward end of said barrel, an ink passage through said pen holder, a protective cap to be applied to the forward end of the fountain pen. and suction producing means arranged in said cap and comprising a rigid suction-tube so secured in said cap as to tightly Join said pen holder and suck through said ink passage from the barrel in the applied position of said cap, a peripheral flange on said tube, a'hose airtightlyv fitted with one endupon said tube, a rigid closing member in the other end of said hose, a peripheral ange on said closing member, a coil spring inserted between said two flanges and surrounding and tending toextend said hose, and means for reciprocating said closing member in the longitudinal direction of said hose.

MRTON KLMN.

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