Abstract: A ball-point pen (1) includes a reservoir (2) communicating with a hole (10) connected to a capillary channel (3) of a tip (4) which is provided with a cavity (9) which seats the ball (5) for writing, this ball (5) being kept pressed against a retaining edge (9t) of the cavity (9) as a result of the thrust of a compression resilient spring (6) terminating in a straight portion (6r) which is aligned with the longitudinal axis (N-N) of the ball-point pen (1) and the free end (6p) of which is in contact with the ball (5). In the ball-point pen (1), the capillary channel (3) has, inside it, elements (7) which, coming into contact with the straight portion (6r) of the spring (6), prevent it from becoming inclined with respect to the longitudinal axis (N-N) of the ball-point pen (1).

Abstract: A ballpoint pen (1) nib (2) housing the ball (3) and having a stem (6), at least one part of which is inserted coaxially into a hole (5) in the lower end (4f) of a hollow barrel (4) forming part of the ballpoint pen (1). On the outer surface of the at least one part of the stem are formed one or more flutes (7i) that extend parallel to the longitudinal axis (Z—Z) of the stem (6) for a length (L) equal to or greater than the axial length (H) of the hole (5) in such a way that the opposite ends (D, E) of the abovementioned flutes (7i) are outside of it and on opposite sides with respect to it.