Method of surface texturing for a writing instrument tip
AssigneeSociete BIC
InventorsJulien Bouchet, Stéphane Larue, Eric Pestour
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Abstract
A method of manufacturing a metallic ball pen tip for a writing instrument comprising a feeding passage extending in an axial direction, the feeding passage reaching in a housing configured to receive a ball, the housing being defined by a cylindrical wall and a wall, the method comprising the steps providing a preform of the metallic ball pen tip comprising the feeding passage and the housing, the housing being defined by the cylindrical wall and a wall, machining the wall so as to obtain a stepped wall, broaching feeding grooves in the stepped wall and coining the stepped wall with a spherical die so as to obtain the ball seat, and a metallic ball pen tip obtained by the method.
Claims20
A method of manufacturing a metallic ball pen tip for a writing instrument comprising a feeding passage extending in an axial direction, the feeding passage reaching in a housing configured to receive a ball, the housing being defined by a cylindrical wall and a ball seat, wherein the ball seat comprises a plurality of feeding grooves and wherein the ball seat is textured, the method comprising the steps of:
- providing a preform of the metallic ball pen tip comprising the feeding passage and a housing preform, the housing preform being defined by the cylindrical wall and a ball seat preform wall;
- machining the ball seat preform wall so as to obtain a stepped wall;
- broaching the feeding grooves in the stepped wall;
- coining the stepped wall with a spherical die so as to obtain the textured ball seat.
Dependencies are inferred from the claim text.