Ball-point pen tip

摘要

A ball-point pen comprises a tip having a ball retainer at its front end for rotatably carrying a ball therein and having a through-opening formed in the ball retainer for communication with the rear end thereof, and an axial sleeve for containing a quantity of ink therein. The through-opening is formed a plurality of axially and radially extending ink guide grooves in its inner surfaces. The guide grooves have a width which is gradually narrowed toward the axis of the pen and a radial depth which is gradually reduced toward the ball retainer.