US3561879A - Capillary passage ink remover for vent - Google Patents

Abstract

A SYTLOGRAPHIC WRITING PEN HAVING INTEGRAL RESERVOIR WITH EXTENDIBLE AND RETRACTIBLE VENT AND CAPILLARY PASSAGE ADAPTED TO THE REMOVAL OF DEPOSITED INK FROM THE VENT OPENING AND VENT VALVE, PER SE.

Description

Feb. 9, 1971 E. BOK 3,561,879

CAPILLARY PASSAGE INK REMOVER FOR VENT 2 Sheets-Sheet 1 Filed Feb; '15, 1969 Feb. 9, 1971 50K 3,561,879

CAPILLARY PASSAGE INK REMOVER FOR VENT Filed Feb. 13, 1969 2 Sheets-Sheet 2 Ma /r4? [db 480 50/6 United States Patent 3,561,879 CAPILLARY PASSAGE INK REMOVER FOR VENT Edward Bok, 1011 Arlington Blvd., Apt. 816W, Arlington, Va. 22209 Filed Feb. 13, 1969, Ser. No. 798,963 Int. Cl. B43k 1/10 U.S. Cl. 401-258 9 Claims ABSTRACT OF THE DISCLOSURE A stylographic writing pen having integral reservoir with extendible and retractible vent and capillary passage adapted to the removal of deposited ink from the vent opening and vent valve, per se.

FIELD OF THE INVENTION This invention is such as to encompass all pens be they for drafting or scribing and is particularly adapted to pens in which the reservoir of ink comprises an integral portion of the barrel, defining the pen.

SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view in side elevation of a stylographic writing pen according to the invention, a portion being broken away;

FIG. 2 is an enlarged fragmentary vertical sectional view-of the pen according to FIG. 1, showing ink passages in the top of ink reservoir and along the vent stern;

FIG. 3 is a transverse sectional view of the writing pen taken along section lines 33 ofFlG. 2;

FIG. 4 is an enlarged fragmentary vertical sectional view of another embodiment of the pen according to the invention, showing the ink passages in a separate ink reservoir cover and vent stem;

FIG. 5 is a transverse sectional view of the writing pen taken along section lines 5-5 of FIG. 4;

FIG. 6 is an enlarged fragmentary vertical sectional view of another embodiment of the stylogra'phic writing pen according to the invention, showing ink passages in ink reservoir cover and modified vent stem; and

FIG. 7 is a transverse sectional view of the writing pen taken along section lines 77 of FIG. 6.

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to FIG. 1, pen 10 consists of barrel 12, which also serves as the ink reservoir, writing nib 14 and the pen tip 16. The rotatable filler ring 18 serves as a cover for an ink filler opening (not shown) in the side wall 20 of the barrel 12. Barrel cover 22 is by thread 24 attached to the barrel 12. Spring loaded vent stem 26, longitudinally extends through the opening 28 in top 30 of the barrel 12. Its knob 34 protrudes through opening 32 in the cover 22.

As shown in FIGS. 1, 2, and 3, inside 36 of the barrel top 30 is provided with a number of ink passages 38, which passages extend from the vent opening 28 to the side wall 20 of the barrel 12. That part 40 of vent stem 26, acting as vent valve, is provided with longitudinal ink passages 42.

Using a vent system without excess ink removal means, such ink is collected in the top cavity 44 of the ink reservoir 12, if the pen is not in its normal inclined writing position. Otherwise, the greater part of it is carried downward as the pen is held in the writing position. Even while writing, droplets of ink, however, will stick to the top of the ink reservoir and vent valve and remain there. If then venting is required, a part of the droplets are taken upward with the stem 26 and deposited in the ink collecting chamber 48. On occasion, where there is positive pressure in the ink reservoir, venting of this reservoir through the ink filled valve recess 46 results in an extra flow of ink through the recess 46 into chamber 48, which ink may be added to a layer of already dried ink. The result is that after a short usage of the pen, the ink collecting chamber 48 is quite filled with dried ink near the vent opening 28 so that the reservoir venting then becomes difficult and chamber 48 has to be removed and cleaned.

Ink passages 38 in the present vent system carry off ink which as droplets remained in the top part 44 of the ink reservoir after the pen is being brought to its inclined writing position and the remaining thin ink film on the surfaces near the vent opening 28 as a residue will no longer affect the proper working of this vent system.

During the venting of the ink reservoir 12 through the vent opening 28 air can enter or leave the collecting chamber 48 via the air passage 49 in cover 22.

In FIG. 4, the ink reservoir cover 50 is leak-free attached to the top 30 of barrel 12' by means of the barrel cover 22' which is screwed on the barrel top 30'. The cover 50 is made of plastic or other synthetic material with good characteristics for the forming of the fine ink passages 38' (see FIG. 5). Easy cleaning of the vent system is possible by removing covers 22' and 50 from the barrel 12'.

Here also is the air passage 49 in cover 22'. The recess 51 in the top of the cover 50 diminishes the longitudinal distance of the vent opening passage 28', which distance can be limited due to the good guidance of the vent stem 26 in the cover opening 32. The enlarged top 27 of the vent stem 26' enables the lifting of the vent stem 26 by hand, whereby the length of protruded vent stem is small as the recess 23 in the top of cover 22' acts as a collecting room for the top 27 in the lowest position for the vent stem 26'.

In FIG. 6 another type of vent system is shown. The barrel 12" is vented during downward movement of vent stem 26'. To prevent excessive negative pressure in the barrel 12" after the venting, due to prolonged upward movement of the stem 26" after the sealing off of the vent opening 28", the diameter of this stem 26" must be kept small.

The barrel 12" has a big ink reservoir, has an air volume of 5,000-10,000 mm. The diameter of the vent opening 28" is 1.5 mm. and the upward displacement of the vent stem 26" 2-3 mm. which dimensions result in a displaced volume of the vent stem 26' of only 5-8 mmfi. This volume creates such a small negative air pressure in the barrel 12", that after the venting action a long period of writing is made possible, before a too high negative air pressure in the barrel 12" which is due to the carrying off of about 50 mm. ink from this barrel 12" via the pen tip to the writing surface, disturbs the normal flow of ink via the pen tip.

The whole vent system is thereby located in the barrel cover 22", which by means of the screw thread 24" is leak-free secured to the barrel 12", vent block 52 is leakfree attached to the cover 22" with the aid of the milled outer surface 54 of its extension 56 and screw thread 58.

(See also FIG. 7.) Vent block 52 defines ink passages 38", extending from the vent opening 28" to the bot-tom end 60 of this block 52. Vent stem 26", protruding through the vent opening 28" has its bottom 62 provided with ink passage groove 42" and its vent valve 40" is provided with the recess 46", whereby its top 64 is attached to the manually operable knob 66 which protrudes through the opening 32". A compression spring 68 is set around knob 66 and in between lower knob 3 end 70 and top 72.

Venting the barrel 12 takes place by an upward movement of the stem 26" counter to the force of a pressure spring, not indicated.

Connected with the spring stem 76 can be a (not shown) cleaning wire, which wire cleans the ink passageway in the pen tip of the writing pen 10".

I claim:

1. A stylographic pen having resorvoir included within pen barrel and reciprocable valve stem for venting the reservoir to the atmosphere comprising in combination:

(A) reservoir cavity closure, said closure forming a valve seat block for a valve stem;

(B) plural ink passages bridging cavity closure and reservoir wall, said passages communicating with said valve seat and said valve vent stern for the removal of accumulated deposits of ink to maintain said valve seat communicating with said reservoir free of ink deposits for the operation of said valve in venting;

(C) vent access for the closure.

2. The improvement of claim 1, in which the respective ink passages are defined radially outwardly by said valve sea-t.

3. The improvement of claim 2, in which the respective ink passages are at least in part aligned with corresponding ink passages on said valve stem.

4. The improvement according to claim 1 in which the respective ink passages are separably disposed from the barrel, said passages being radially disposed conically with respect to said valve seat and said valve stem.

5. The improvement according to claim 4 in which the valve stem adjacent said valve seat includes plural ink passageways corresponding in alignment with at least a portion of said cavity passageways.

6. The improvement according to claim 1 in which the vent stern and corresponding valve seat are of miniscule dimension with respect to said reservoir, at least one of said ink passageways corresponding in alignment to a corresponding valve stem ink passageway.

7. The improvement according to claim 6 in which the cavity ink passageways are arrayed in conical disposition with respect to the ink reservoir.

8. The improvement according to claim 1 in which the valve seat block is detachable from said barrel.

9. The improvement according to claim 8 including cover means in which the valve seat block is secured, said cover means being detachably secured to the barrel of said pen.

References Cited UNITED STATES PATENTS 2,512,004 6/1950 Wing 401-225X 2, 81,739 l/1952 Wing 401225 2,581,739 11/1954 Miessner 401225 2,874,679 2/1959 Zepelovitch 401226X FOREIGN PATENTS 857,986 1/1961 Great Britain 401-260 1,073,878 6/1967 Great Britain 401-258 597,184 8/1959 Italy 401259 LAWRENCE CHARLES, Primary Examiner

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