IMPROVEMENTS IN OR IN RELATION TO WRITING INSTRUMENTS.

摘要

AN INK CONTAINER FOR A WRITING INSTRUMENT (1) HAS A VALVE (6) ARRANGED BETWEEN AN INK TANK (3) AND MEANS TO SUPPLY INK FROM THE TANK. THE VALVE IS DRIVEN BY THE PRESSURE DIFFERENTIAL AND PROVIDES A POSITIVE CLOSURE DURING MOMENTS WHEN IT IS NOT WRITTEN, AND RELIABLE CONTROL OF THE INK FLOW DURING THE WRITING PROCESS.