Drawing and writing brush-pen with round and flat hair and adjustable flow of permanent liquid ink
BACKGROUND OF THE INVENTION 
     The present invention relates to a brush-pen of round and flat hair with an ink container in the upper part feeding the hair tip. This container is supplied with a mechanism which adjusts, as desired, the amount of ink released, allowing continuous drawing and writing and doing without the inkpot. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the enclosed drawings: 
     FIG. 1 is a view in cross-section of the assembled brush-pen set, revealing its interior mechanism; and, 
     FIGS. 2, 3, 4, 5 and 6 are enlarged views in cross-section showing components of the brush-pen set of FIG. 1 separately and in detail, as well as their functions in the set of FIG. 1. 
    
    
     DETAILED DESCRIPTION 
     As can be seen in the drawings, FIG. 2, the interior body of the ferrule is made up of a hollow cylinder 1 with an external thread 1a. The hollow cylinder 1 is provided with an intermediate, outwardly extending, circumferential flange 1b and, beneath flange 1b, is provided with a slightly cone-shaped tip 2. The upper part of the cylinder 1 contains a cap 3 comprising three or more wings 3b extending outwardly from a cylindrical, hollow central tube 3a. The wings engage the inner wall of the hollow cylinder 1, and the central tube 3a provides a guide for a shaft 5a extending therethrough. The wings thereby centralize the cap 3 and the central tube 3a with respect to the cylinder 1 while providing for the passage of ink therethrough. 
     The inner body of the cylinder 1 is straight along most of its length with an inwardly extending, circumferential flange or ring 4 slightly above a cone-shaped inner portion 4a. The cone shaped portion 4a extends down to a lower end 2b of the hollow cylinder 1. 
     There is, within the central hollow cylinder 1, a smaller cylindrical piston 5 through which the shaft 5a extends upwardly and through the central tube 3a of the cap 3. The shaft 5a is provided with a headed part 5b at the upper end thereof and extends into the cap of the brush-pen as can be seen from the assembly drawing of FIG. 1. The piston 5 is hollow and has an expansion spring 6 disposed therein. The spring 6 has an upper end fixed or connected to the shaft 5a in a suitable manner and the lower end of the spring 6 is seated on a peripheral abutment or inwardly projecting flange or ring 6a on the wall of the piston 5. The shaft 5a extends through the piston 5 and is connected to a movable stopper 6b, from the lower side of which extends a filament 7. The stopper 6b moves downwards when the shaft 5a is moved downward by rotation of the cap 19 of the brush-pen. When the stopper 6b is moved downwardly, the shaft 5a is pressed downwardly on to the spring 6 compressing it against the abutment 6a of the hollow piston 5 and the shaft 5a and the stopper 6b are thus biased upwardly with the shaft biased into pressure contact with the cap so as to move upwardly as the pressure applied by the cap is removed. The piston 5 may move upwards to the upper cap 3 and downwards to the lower flange or abutment 4, when the brush-pen is shaken by the operator. 
     There is, fixed on the cone-shaped tip 2, a ferrule 8 with hair (brush) tip 9 which begins slightly below the lower part of the movable stopper 6b and ends at the cone-shaped tip 2b of the outer cylinder. The ferrule 8 is provided with a hollow passage 10 therethrough which communicates with the hair (brush) tip 9 at its upper end. The filament 7 connected to the lower part of the stopper 6b penetrates the passage 10 of the ferrule 8 through to the end thereof. 
     The outer body of the ferrule, FIG. 3, is made up of a hollow cylinder 11, having on its upper part a smooth top 11a of smaller diameter with a thread on its base as indicated at 11b. This thread has a central orifice 12 connected with the interior of the cylinder 11. Half of the lower part of this cylinder is supplied with threads 13. The outer body of the ferrule is threaded on its lower part 14. 
     The inner body, FIG. 3, is screwed to the inner part FIG. 2, of the ferrule, along with the shaft 5a which goes through the central orifice 2 penetrating through the ink container, FIG. 4, fitting the head 5b in the hollow cylinder of the cap, FIG. 5. 
     The ink container, FIG. 4, is made up of a hollow cylinder 15 open on both sides 15a, 15b and threaded on the upper and lower inner extremities 16 and 16a, respectively. The lower extremity 16a is screwed on the smooth top of smaller diameter 11a of the outer body of the ferrule (FIG. 3). 
     The cap of the ink container, FIG. 5, comprises a cone including two parts. A lower part 17 is hollow and threaded on its base 18. An upper part of the cone and regulator of the flow of ink is made up of a head 19 attached to a hollow threaded cylinder 20. This cap is threaded on the upper part of the ink container, FIG. 4. 
     The cap protecting the hair (brush) tip, FIG. 6, is made up of a smaller hollow cylinder 21 with one of its round extremities closed 22 and the other one open 23. Through pressure, it can be encased on the external cone shaped tip 2 (FIG. 2) so as to protect the hair (brush) tip against eventual damage and so as to avoid drying up of the ink. 
     In operation, turning the cap 19 (FIGS. 1 and 5) clockwise, counterclockwise the flow of ink is adjusted through the pressure exerted on the shaft 5a by the cylinder 20 of the cap 19, which in turn pushes the stopper 6b down, opening or closing the ink passage through the passage 10 which crosses the ferrule 8, feeding the brush 9. Specifically, downward movement of the stopper 6b restricts the passage of ink to the brush 9 and completely stops the flow of ink to the brush when the stopper is in contact with the ferrule 8. 
     The ink flows from its container through the passages between the wings constituting the cap 3 filling the hollow cylinder 1. It then flows between the inner wall of the cylinder 1 and the outer wall of the piston 5. Shaking by the operator will liberate clogging of the ink between the walls by the reciprocating movement of the piston 5 against the relatively light action of the spring 6. From this passage between the walls, the ink flows down through the peripheral passages and the abutment ring 4 and fills the chamber below the movable stopper 6b. The downward movement of the shaft 5a presses the stopper 6b downwards and reduces the volume of the chamber thus regulating the ink flow toward the brush tip.