US1051671A - Fountain-pen. - Google Patents

Description

C. W. BOMAN.

FOUNTAIN PEN.

APPLIUATION FILED ooT.1, 1912.

1,051,671, Patented Jan. 28, 1913,

UNiTED sTATEs PATENT OFFICE.

CLAES w.' ECMAN; or BaooKLYN, NEW Yoax, AssreNon lro EAGLE PENCIL COMPANY,

, I or NEW Yonx, N. Y.

FOUNTAIN-PEN.

Tolal whom t may concern:

Beit known that I, CLAES W. BOMaN, a citizenof the United States, and a resident of Brooklyn, in the county of Kings and `of the two parts secured together.

State of New York, have invented a new and useful Improvement in Fountain-Pens, of which the following is a specification.

This invention relates to tips or nozzles for fountain pens, and more particularly to those tips which have attached to them a bag or tubular receptacle containing the wrltlng fluid-this receptacle fitting upon the neck of the tip, and being removable with the latter. And the invention consists in a certain construction of the tip, designed to cheapen the cost of manufacture, and enhance the efficiency of the tip, which will first be described in connection with the accompanying drawing, and will be more particularly pointed out in the claim. n In the drawing-Figure 1 is a long1tud1- nal axial section, partly in elevation, of a'r fountain pen embodying my improvement omitting the feed bar and pen. Flg. 2 1s a view of the two parts of which the tip. 1s compo-sed. Fig. 3 is a longitudinal section fitted together, before belng Fig. 2r is a longitudinal section of these two parts fitted and secured tovether to form the completed tip and contalning the feed bar and pen.

In the drawing, referring to Figs. 1 and 4, A is the tubular handle; B is the tip, fitting 'closely into and closing the front end of the handle, and containing and holding the usual feed bar and pen y; and C is an ink bag made of soft vulcanized india rubf ber contained within the handle and having i The base of the tapered portion d is less in its mouth fitted tightly upon the neck or rearend of the tip B. The tip is ycomposed of an exteriorsheet metal shell d, preferably finished with asuitable varnish coat to resemble hard rubber or vulcanite in appearance, and an interior hard rubber tube e. These partsv are shown separately in Fig. 2. The metallic shell has a tapered front portion d which increases in diameter from front to rear, and a rearportion d2 of cylindrieal or other suitable shape to fit into and close the mouth of the handle A (Fig. 1).

diameter than the rear cylindrical portion d2, andthe two parts are j oined by an annular fiange or shoulder d3 which intervenes between them and defines the rear limit of Patented Jamas, 1913.

the tapered part d. The hard rubber tube e'ls of cylindrical form, with a tapered exterior at its front end for a portion of its length, as shown at e', this portion e con` formlng in taper to that of the portion d of the exterior metallic shell so as Ato t snugly and tightly together, and being of somewhat greater length than dso that when the two arts are fitted together the front end of 't e part e will protrude a short distance through and beyond the front end of the portion d', as shown in Fig. 3. The rear cylindrical portion e2 of the hard rubber tube is longer than the cylindrical portion d2 of the shell d, so that when the two parts are tightly fitted together, the rear portion e2 of the hard rubber tube will ex^ the external diameter of the portion e2 of hard rubber tube and the internal diameter of the surrounding cylindrical portion d2 of the shell, there is an annular space between the two, into which the mouth of the rubber bag can extend, if preferred.

In putting the parts together, the hard rubber tube e isinserted and fitted into the shell, being driven forward therein until its tapered portion e is forced home into the tapered portion d of the sheet metal shell (as seen in Fig. 3) and then the parts are secured together by turning the protruding end of the front portion e out and back upon the front end of the shell, forming a flange e3 by which the parts are held tightly and immovably together, as indicated in Fig. 4. ,This operation, as will be underystood by those skilled in the art to which this invention pertains, can readily be effected'by the application of heat and pressure, in conjunction with a` suitable die'or former; and it is preferred that the die or former shall be so shaped as to outwardly are or bevel the interior of the front end of the rubber tube, as indicated at e, Fig. 4, so as to Jfacilitate the subsequent application to the tip of the feed bar w and en y.

A tip thus made cannot be distinguished in appearance from an all-rubber tip. The sheet metal shell can expeditiously and cheaply be fashioned into the external shape of a fountain pen tip, thus saving the exand arrangement of arts bein the metal 1s protecte pense and time :required to thus xfashion an all-rubber ti while the whole interior of the tip is o hard rubber, the construction such that complete y from the ink, and conse uent corrosion, the hard rubber tube alone aving contact with the ink.

Having described my invention, what I claim herein as new and desireto secure by Letters Patent is:

A fountain pen tip `consisting of an exterhal sheet metal shell having a tapered front portion and a cylindrical rear portion,

and a hard rubber tube of a length to ro-I ject beyond the ends of the sheet metal s e'll at vfpggggnd rear, and having a fronttapered Loenen f portion to hit the tapered portion of the tube being fashione as an annular Bange to. bear against the front of the metal shell and to lock the parts to ether and in place, substantially as and or the purposes hereinbefore set. forth. l ln itestimon whereof l ax my signature 1n presence o two witnessesn CLAES W. BOMAN. Witnesses:

EDWIN M. BEROLZHEIMER, SAMUEL Knaus,

ortion of the shell, 29

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