US 2035278 A
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S. M. SAGER FOUNTAIN PEN March 24, 1936.
Filed March 12, 1934 3mm M 6219er ,Solomon Patented Mar. 24, 1936 UNITED STATES PATENT OFFICE 4 claims. (c1. 12o- 46) It is an object of this invention to -provide a fountain pen of the bellows and plunger type wherein the bellows is operable by' a plunger and upon release of the plunger causes entrance of a supplyof ink into the container or Vbarrel and simultaneously acts as a spring means for returning the plunger to normal position.
Still another object of the invention is to provide an improved type of fountain pen having a plunger operated bellows engaged in a unit secured on one end of the fountain pen barrel and adapted to be so constructed that the body of the fountain pen, including the barrel and end caps, may be constructed of a plurality of diierent oval or flattened shapes, rather than the conventional cylindrical or round fountain pen shapes.
Another object of the invention is to provide a fountain pen having secured on one end of the 'barrel thereof a lling and ink supply unit.
Other and further important objects of 'this invention will be apparent from the disclosures in the specification and the accompanying drawing.
This invention (in preferred forms) is illustrated in the drawing and hereinafter more fully described.
On the drawing:
Figure 1 is an elevational view of the fountain pen with both end caps removed and showing a predetermined quantity of ink in the barrel.
Figure 2 is an enlarged longitudinal detailed section through the upper end of a fountain pen, illustrating a ller mechanism in the form of a bellows.
Figure 3 is a similar section illustrating another modified form of a bellows operable by means of a telescoping type of plunger mechanism.
As shown in the drawing:
A fountain pen, indicated generally by the numerals I0, comprises a passaged body or casing I I, of separable parts, which carries a pen nib I4 at its lower end and a filling device at its upper or shank end, and is adapted to provide a reservoir or barrel I2 for a quantity of writing ink I3.
The portion of the casing which'provides the ink reservoir I2 is of transparent material, and is suitably graduated and marked so that one may readily note to what extent the ink I3 occupies the normal ink space.
The pen nib I4 is operably connected with the reservoir I2 by ink feeding means (not shown), and the reservoir is provided with suitable inlet means, such as an inlet tube I5 connected to the ink feeding means at its lower end and terminating at its upper end at a point just below the shank portion I6'of the casing. A ller mechanism is disposed in the shank portion I6 of the casing II to suck ink through the inlet of the reservoir by the way of the tube I5, or its equivalent, and the filler mechanism comprises a bulb I1 formed of ilexible material, such as rubber, and a plunger I8 suitably guided by guiding means in the casing for longitudinal movement l in the casing to produce movement of the bulb I1. The bulb I1 is closed at its upper end, and the interior of the bulb is in communication with the inlet I5 and the reservoir I2 through an opening I9 in a base flange 20 of the bulb. l5 The base ange 20 is of substantial thickness and of a diameter suftlcient to afford a tight fricf l tional t with the inner face of the wall of the casing Il, and it seats tightly on an abutment 2| formed in the wall of the casing. 20
As is indicated by the numerals 22 and 23 of Figurel 2, the wall of the bulb I'l is of graduated thickness, or may be considered as formed of integrally connected walls of different thicknesses. It will be obvious that as the head of the bulb I1 is moved downwardly by the application of a force to the plunger I8 to produce downward movement of the plunger, the converging walls 23 will pivot about the thicker wall 22 and move' downwardly, and that a portion thereof will seat on the inner face of the diverging wall 22 which, in effect, provides an elastic or springy conical seat for the seated portion. It will be equally obvious that when the downward force is withdrawn from the plunger the self-restoring action of the walls of the bellows will return the bulb to its normal expanded condition, and not only push the plunger outwardly'but also suck a supply of ink into the ink space of the barrel through the intake tube I5. 40
In Figure 3 the bulb I1 is shown as formed of a plurality of integrally connected converging and diverging walls of different thicknesses so that the structure presents a plurality of infolding walls and a plurality of elastic conical seats.
The walls of the bulb I 1 may be reenforced by a wirev coil or spring 24 embedded therein.
The head of the bulb is provided with an integrally connected and centrally disposed stem or linger 25 which is secured within the plunger 8l, 50 to form a convenient means for the application of the force of the descending plunger to the elastic head of the bulb.
I claim as my invention.:
1. A fountain pen comprising an elongated barrel having means therein defining an annular seat. a filler unit in said barrel having a base ilange seated on said seat, said ller unit coinprislng an elongated and integral bulbous structure of resilient rubber, or the like, formed to provide spaced opposed walls of a certain thickness and other spaced opposed walls of a less thickness whereby said walls of less thickness are adapted to be resiliently seated on and between said walls of greater thickness when pressure is applied longitudinally to the bulb.
2. In a. fountain pen,`a illler unit'comprising an elongated integral and bulbous structure of resilient rubber. or the like, provided with a base flange, and formed to provide spaced opposed walls of a certain thickness and other spaced opposed walls of a less thickness whereby said walls of less thickness are adapted to be resiliently seated on and between said walls of greater thickness when pressure is applied longitudinally to the bulb.
3. In a fountain pen, a ller unit comprising an elongated integral and bulbous structure of resilient rubber. or the like, provided with a base iiange, and formed to provide spaced opposed walls of a certain thickness and other spaced opposed walls of a greater thickness shaped to define an approximately conical and resilient seat for said walls of less thickness when pressure is applied longitudinally to the bulb.
4. In a fountain pen, a iiller unit comprising an elongated integral and bulbous structure of resilient rubber, or the like, and formed to denne spaced rearwardly diverging walls and other spaced rearwardly converging walls whereby said diverging walls are adapted to provide a conical seat for said converging walls when said converging walls are seated on and between said diverging walls upon the application of pressure longitudinally tok said bulb.
SOLOMON M. SAGER.