Pen axis null for synthetic resin make writing

摘要

A stick-like writing nib, made of a synthetic resin, has a plurality of narrow slit-like first ink passages extending radially from the axis in sectional profile and a plurality of narrow slit-like second ink passages provided in sector-like areas in sectional profile defined by walls the first ink passage, which are defined by a plurality of walls extending parallel to a line bisecting an angle subtended by the sector-like area into two angels, and inner end portions of the first ink passages being defined by thin walls extending along the nib axis.