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EP0433459A1 PEN POINT MADE OF INORGANIC MATERIAL 失效
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PEN POINT MADE OF INORGANIC MATERIAL
摘要:
A pen point made of an inorganic material, which is free of restrictions on the viscosity of ink and the particle diameter of pigment to be used, excellent in buckling strength, highly resistant to wear and solvent, and capable of mass production at low cost. It has such a structure that a mixture of fine particles of metal or ceramic with a binder is extruded, degreased, and sintered to form a continuous piece having a uniform cross-section and provided with through holes of various profiles along its axis permitting capillary movement of ink and grooves for ink passage with one end thereof forming a part of the surface sharpened at its tip to be used mainly for writing.
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