NIB UNITS FOR PENS

摘要

A holder for an auxiliary nib (22) is disclosed which is intended to be fitted on the body of a main marker pen (2) when a finer line is to be drawn. The auxiliary nib holder has at its outer end a cavity (12) in which fits a length of ink-permeable material (16) in ink-transfer contact or relationship with a projecting fine nib (22). Also seated with the cavity is an axially-movable preferably globular wick (26) which is prevented from falling out of the inner end of the cavity, e.g. by means of an end rib (24). The globular wick (26) is of controlled and known permeability, so that ink is able to flow at a known and acceptable rate to the fine nib (22) when the auxiliary nib holder is in position on the marker pen and the globular wick (26) is engaged by the marker nib (6).