Writing tip for a roller ball pen, has a holder to hold a roller body for rotating and a passage way for ink between the holder and the roller body

摘要

A sleeve (16) fits with an adjusting thread (14) on a tip holder (10) with an ink channel (12) and forms a holder for a writing ball (20) together with a counter bearing (18), part of which is formed by a piezoelectric element (22) linked to an electric circuit to feed the piezoelectric element with voltages of varying levels.