Composite pen tip

DETAILED DESCRIPTION Therefore, the primary purpose of the present invention is to provide a composite pen tip adapted to write fine letters or drawing fine lines that uses the composite effect of combinations of various materials that suit the specific purpose.
It is another object of this invention to define the composite pen tip where the core member, combined with the tubular casing, is allowed to work consistently as the substantial part of the writing tip to achieve smooth consistent writing of fine letters or lines of a constant width with a proper ink flow.
These objects of the present invention are achieved by a composite pen tip that comprises a core member inserted through a tubular casing to form an axial ink flowing channel between the inner surface of the tubular casing and the core member.
The core member is made of a material more wear resistant than the tubular casing and the front ends of the core member and tubular casing are substantially flush with each other to form a level writing face.
The tubular casing and the core member are curved in substantially the same form in at least one area in the axial direction and in substantially the same portion so that the core member can slide backward as the tubular casing wears.