METHOD OF REALIZING FEEDING DUCTS FOR WRITING LIQUIDS, PARTICULARLY FOR FOUNTAIN PEN NIBS, AND DUCT OBTAINED BY THE METHOD

Abstract: Method of realizing feeding ducts for writing liquids, paticularly for fountain pen nibs, wherein the duct consists of a substantially cylindrical element having a plurality of circumferential grooves (2) serving to create respective fins (3), characterised by realizing the duct in two distinct portions (1, 1') disposed symmetrically in relation to a longitudinal plane, and by providing each portion (1, 1') with a longitudinal recess (6) combining with the recess of the other portion to form a groove (7) when the portions are secured one to another.

Description: Method of realizing feeding ducts for writing liquids, particularly for fountain pen nibs, and duct obtained by the method The present invention relates to a method of realizing feeding ducts for writing liquids, particularly for fountain pen nibs, and a duct obtained by the method. Ink ducts are known for the nib of a fountain pen. Such ducts generally consist of a plastics material cylindrical element and provided with a plurality of circumferential grooves, evidentiating respective fins, and with a longitudinal groove approximately l mm deep and 0.1-0.15 mm wide providing the channel by way of which ink is fed to the nib. The longitudinal groove in question which doesn't extend along the entire length of the duct and substantially ends in correspondence of the application zone of the nib is formed during the moulding operation by positioning a laminar insert of corresponding dimensions internally of the mould. These known ink ducts presents certain drawbacks, and in particular: - a constructionally laborious method of fashioning the longitudinal groove, due to the exiguous dimensions of the laminar insert, which can become displaced during injection of the plastic material; - a certain difficulty in utilizing multiple impression moulds, likewise due to the exiguous dimensions of the laminar insets which are subject to varying pressures. According to the invention such drawbacks are eliminated through a method of realizing feeding ducts for writing liquids, particularly for fountain pen nibs as described in claim 1. The invention also foresees to use a duct as claimed in claim 4. Preferred embodiments of the present invention will now be described in detail, with reference to the accompanying sheet of drawings, in which: Figure 1 is a perspective exploded view of an ink duct according to the invention; Figure 2 shows the duct in cross section; Figure 3 shows it in the embodiment as fiber pen or high lighter; and Figure 4 shows it in the embodiment as liner. As can be seen from the drawings, the ink duct for fountaing pen nibs according to the invention consists a substantially cylindrical element formed from two distinct portions 1 and 1 / , disposed symmetrically in relation to a longitudinal plane. The lateral surface of each semicylindrical portion and 1' exhibits a plurality of grooves 2 which create plurality of respective fins 3 serving to retain the ink. In addition, one portion 1 is provided with studs 4 insertable in corresponding sockets 5 formed in the other portion 1 ' . Each portion 1 and 1' has its flat surface provided with a longitudinal recess 6 extending substantially along the entire length of one edge of the portion apart from the front end and combined with the recess 6 of the other portion 1' and 1 so as to create a groove 7 along which ink is fed to the nib of the pen. According to the invention, the ink duct is realized utilizing a mould of which one die affords two impressions corresponding to the external shape of the two portions 1 and 1' , whilst the remaining die affords two ribs by which the two longitudinal recesses 6 are formed during the moulding operation. The latter die also affords two holes and two pins, by which the studs 4 and the sockets 5 are formed in the two portions 1 and 1". It will be clear from the foregoing that the method of realizing pen nib ink ducts according to the invention presents numerous advantages, in particular: - the use of a constructionally simple mould that can be embodied with multiple impressions and does not require the interposition of laminar inserts; - a qualitatively better product due to the fact that grooves of greater depth are obtainable. Moreover it has been surprisingly observed that the writing action of a nib fitted to the ink duct according to the invention is more cushioned and freer from vibrations than that of the same nib when fitted to a conventional duct. In the embodiment shown in figure 3 the groove 6 is made inside the duct and comunicates with a seat 8 having suitable size to house a fiber point 9 with one end 10 projecting outwards the duct. In the embodiment shown in figure 4 the front end of the duct is suitably shaped so at to form a liner, the function of which the nib generally carries out. This is allowed by the fact that, even if the groove doesn't extend along the entire length of the duct, in any case it is possible to space apart the two portions 11 in correspondence of their front ends by pressing them on the writing surface and to le the ink to fall. It is also foreseen to provide the front end of the tw portions 11 with a seat suitable to house a sphere for the s called "roller" writing system.

Claims: C L A I M S 1. Method of realizing feeding ducts for writing liquids, particularly for fountain pen nibs, wherein the duct consists of a substantially cylindrical element having a plurality of circumferential grooves (2) serving to create respective fins (3) , characterised by realizing the duct in two distinct portions (1,1') disposed symmetrically in relation to a longitudinal plane, and by providing each portions (1,1') with a longitudinal recess (6) combining with the recess of the other portion to form a groove (7) when the portions are secured one to another. 2. A method as claimed in claim 1, characterised in that the two portions (1,1') are provided with means (4,5) by which to secure the one portion to the other. 3. A method as claimed in claim 1 characterised by providing each portion (1,1') with a longitudinal recess which extending substantially along the entire length of the portion. 4. A duct obtained by the method as claimed in claims 1 and 3, comprising a substantially cylindrical element having a plurality of circumferential grooves (2) serving to create respective fins (3) , characterised in that it is formed fro two distinct portions (1,1') disposed symmetrically i relation to a longitudinal plane, such as can be secured one to another, and in that each portion is provided with a longitudinal recess (6) combining with the recess of the other portion to form a groove (7) when the portions are secured one to another. 5. A duct as claimed in claim 4, characterised in that one portion (1) is furnished with studs (4) stably insertable in respective seats (5) provided in the other portion (1'). 6. A duct as claimed in claim 4 characterised in that the front end is nib-shaped. 7. A duct as claimed in claim 4 characterised in that the groove houses a fiber (9) , the front end (10) of which projects from the duct and is high-lighter shaped. 8. A duct as claimed in claim 7 characterised in that th recess (7) is provided at the inside of the duct an communicates with a seat (8) in which the fiber (9) i housed. 9. A duct as claimed in claim 4 characterised in that th front ends of the recess (7) are shaped so as to form a sea for housing a sphere for the so called "roller system".

Inventors: MORO CAMILLO, MORO, CAMILLO
Applicants: MORO CAMILLO, MORO, CAMILLO
Application year: 1993
Main classification: B43K5
IPC codes: B43K5