Verfahren zur Oberflächentexturierung für eine Schreibinstrumentenspitze

Details

Veröffentlichungs-Nr.

EP3792075

Aktenzeichen

EP19306094

Anmeldetag

11. September 2019

Veröffentlichung

4. September 2024

Erteilung

4. September 2024

Rechtsraum

EP

IPC

B43K1/08

Abstract

A method (100) of manufacturing a metallic ball pen tip (14) for a writing instrument (10) comprising a feeding passage (26) extending in an axial direction, the feeding passage reaching in a housing (28) configured to receive a ball (24), the housing being defined by a cylindrical wall (30) and a ball seat (40), wherein the ball seat comprises a plurality of feeding grooves (38), and wherein the ball seat is textured, the method comprising the steps providing (102) a preform (14A) of the metallic ball pen tip comprising the feeding passage (26) and a housing preform (28A), the housing being defined by the cylindrical wall (30) and a ball seat preform wall (32), machining (104) the ball seat preform wall so as to obtain a stepped wall (34), broaching (106) feeding grooves (38) in the stepped wall and coining (108) the stepped wall (34) with a spherical die (54) so as to obtain the ball seat (40).Also disclosed is a metallic ball pen tip obtained by the method.

Anmelder

Firma

Société BIC

Land

🇫🇷 Frankreich

Fachgebiete