US1633111A - Reservoir pen - Google Patents

Description

June 21, 1927.

Inventar: Mir KNMI@ v Patented Jane 21, 1927.

UNI-TED STATES 1,633,111 laajralal OFFICE.

Trmonon xovcs, or Banana', GERMANY.

RESERVOIR PEN.

Applicationv led July 9, '1928, B erial No. 121,458, and.l in Germany July 11,- 1925.'

The usual type of. reservoir pen has recesses. in the two sides of the feedsbar behind Athe nib,` these recesses forming -,side chambers which accommodate excess ink when the pen is in use. These side chambers are ,not alwaysof suicient capacity to receive the overfiow, and itis the object of this invention to provide additional accommodation for excess ink when' thepen is in use. According to the invention, the feed-bar 1s provided with an overflow chamber at-thev fore-end thereof or -with a rear overflow chamber-at the back of that portion of the I feed-bar which projects out of the `barrel .15 of the-pen or, preferably, both o'f these overflow chambers are employed. The overflow chambers are thus situatedin positions notv heretofore utilized for this purpose, althoughthese positions'are particularly "suitable, being located low down when the pen is in use.

The overflow chamber at the fore-end of the feed-bar" occupies the lowest position when the pen is in use andpreferably extends up to the pointed end of the feed-bar, that is to say, up to the nib, so that it is, at least at its lowest point, indirect communication with the ink feed.- Side passages may connect the fore-chamber with the usual side overflow chambers behind the= nib. The overflow `chamber at lthe back of the feedbar preferably forms a continuationof the 4 turned to return 'to the inkreservoir, the rear 'overflow chamber and also the side overflow chambers communicate with the usual capillary ink grooves in the bottom of the longltudinal air channel in the feed-bar vby aperture'ssufliciently small't prevent 'the passage ofair. These' apertresserve to re.

turn `the ink from the overflow chambers to the reservoir when the pen is upturned. 1he aforesaid apertures open into the mid- "dle of theaper'tured surface, that to say,

the overflowschambers when the pen is up-v they are not arranged at a corner, but in a l flat wall/or surface. In consequence thereof,

whenthefpen is in the writing position,'therc is insuicient capillary attractibn in these apertures to overcome the surfacetension of the ink and therefore the ink does not escape-through the apertures into the overflow chambers when writing. Moreover these apertures are so short that they do not readily clog. i i

The accompanying drawings illustrate two examples of my invention by way of.

explanation. Fig. 1 is a part longitudinal ksection -through the endlof a reservoir pen having a retractible nib and feed-bar.

Fig. 2 is a similar view ofn a pen having a fixed nib and feed-bar. Fi s. 3 andfl are cross-sectional views on the llnes 3 -3 and 4 4 of Figsf 1 and 2 respectively.

On the drawings, A1 designates the pen i barrel, B the feed-bar and F the, nib. The

feed-bar B has the usual air channel C, in

the bottom ofwhieh are formed the ordi--` ,nary ca illary` ink grooves D. The' feed-bar as the usual recesses or 'side overflow B also chambers E "in both sides of it.

Referring now to\Fig's.--1 and 3, the back of the feed-bar B (remote from the nib) is 'provided with a broad axial chamber G open to the outer air through a lateral opent. ing J close to the end of the chamber G nearer the ink reservoir. .An apertured partitlon or plate H divides the chamber G into two compartments and projects beyond the inclined end. face of the feed-bar, the 'outer end of the partition H being secured to a curved cover plate K which, with the inclined end face of the feed-bar, forms a fore-chamber L open at each' side. This fore-chamber extends up to the nib F, where yit is in direct communication with the ink feed. =It also-communicates with the side ambers El through lateral passages M.

he chamber G and the side chambers E also ,communicate with the ink grooves D b small orifices B andI O respectively, whic will not allowair to pass through, but enable "the ink retained in the chambers to return to the in k re `servoi1 when the pen is upturned. j j

In theconstruction shown -in Figs. 2 and 4, the back of the feed-bar B is formed with longitudinalkgrooves or cavities S separated from one another by -a longitudinal web R and covered by a plate T, which is curved at' having a longitudinal overflow chamber in its fore end to form, with the inclined end the back of the projecting portion' of the face of the feed-bar B, the open-sided forefeed-bar, said longitudinal chamber formchamber L. Near the other end, theplate ing a continuation of the rear end of the T has an aperture J whereby the cavities S overflow chamber on the inclined-end of the communicate' with the outer air. The forefeed-bar and a covering member extending chamber L communicates with the side over both the end chamberand the longichambers E through passages M and the tudinal chamber andl lhaving an air inlet .cavities S communicate with the side chamaperture at its inner end.

bers E through passages N. The-side cham.- 8. A 'reservoir -pen fomprising a holder, a

bers `E 'communicate in turn with the inkt feed-bar adapted to project therefrom and grooves D through small orifices O which having an inclined outer end, a nib adapted lprevent the passage of air, but permit the to bear against the longer side of the outer ink to return to the ink reservoir. end portion of the feed-bar, an air channel Claimsi' extending along the nib-side of the feed- 1. A reservoir pen comprising a holder, a bar and having capillary ink grooves along feed-bar adapted to.. project therefrom, a the bottom of said channel, side chambers in nib adapted to bear against one side of the said feed-bar to receive overflow ink, a coverouter end portion of the feed-bar, an air ing member extending over the inclined end channel extending along the nib side of the of the feed-bar to provide a space between feed-bar and having capillary ink Igrooves the two, said space extending from the nib along the bo'ttom of said channel,l side chain to a rear airinlet, andink return passages bers in said feed-bar to receive overflow ink, connecting said space to-the side chambers.F and an overflow chamber in that part of the 9. A reservoir pen comprising a holder, a projecting portion of the` feed-bar away feed-bar adapted to project therefrom and from the nib, said overow chamber being having an inclined outer end, a nib adapted adapted at its outer end to receive overflow to bear against the .longer side ofthe outer' ink and having an air inlet at its inner end. end portion of the feed-bar, an air 'channel i 2. A reservoir pen comprising a holder, a extending along the nib side'of the feed-bar feed-bar adapted to project therefrom and and having capillary ink grooves along the having an inclined outernend, a nib adapted bottom .of` said channel, side `4chambers in to bear against the longer side of the outer said feed-bar to receive overflow ink, a`

side chambers and over 'a curved plate over said vinclined end.

e feed end portion of the feed-bar, an air channel longitudinal recess inthe back of the proextendin along the nib side of the feedjecting portion of the feed-bar and extendbar and aving capillary ink grooves along lng from the inclined end thereof, an overthe bottom of said channel, side chambers How chamber formed on the inclined end of in said feed-bar to receive overflow ink, and said feeuiybar, an air inlet at the inner end an overflow chamber formed on the inclined aid longitudinal recess, and ink return end'of said feed-bar, said overflow cha er passages connecting said recess with the ink extending rearwardly from the/nilnd havgrooves in the feed-bar.' v mg an air inlet at its reaiid. 10. A reservoir pen comprising aholder,

3. A reservgir/pen/ as specified in claim 2 a feedebar adapted to project therefrom having afloigitudinal overflow chamber in and havingA an inclined outer end, a nib the back of the prbjecting portion of the adapted to bear against the longer side of feedibar, said longitudinal chamber forming the outer end )portion of the feed-bar, an a continuation of the rear endk of the overair channel extending along the nib side of flow chamber on the inclined end of the feed- .the feed-bar and having capillary ink bar and having an air inlet at its inner end. grooves ',along the bottom of said channel, 4. A reservoir n as specified in claiin 1 Side Chambers in said feed-bar to receive having ink-retur vpassa es connecting the Overflow mk, a 10l}g1tudmal recess 1h the ow chamber with back ofthe prolecting portion of the feedthe'ink grooves, said passages being so-small as to reventjthe passage of air. A

5 reservoir enas specified in claim 2 inclined end of said .feed-bar, an air in let having the over ow chamber-- formed beat the inner end of said longitudinal recess,

`Jween the inclined end, of the feed-bar land. and ink return Passages Fermeeting-the side chambers and longitudinal recess res c- 6. A reservoir n as specified in V`claim l tively with the ink greeveein the feed' er, wherein the overdw c hamberis formedv by and a lo 'tudinal recess in theouter end of the chambers and, the ser@ overflow chamber' ligir, of relatively large cross-sectional The, fore 0mg Speeleatlen slgned et Ber' lin this 18t day o f June, 1926. 2

THiionon Kovacs.-

area.

7. A reservoir pen as specified in claim 2A ar and extending from the inclined endl thereof, an overflow chamber formed on the connecting passages 'between the side

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