IMPROVEMENTS IN OR RELATING TO WRITING INSTRUMENTS

摘要

AN INK CONTAINER FOR A WRITING INSTRUMENT ( 1 ) HAS A VALVE ( 6 ) DISPOSED BETWEEN AN INK RESERVOIR ( 3 ) AND MEANS FOR FEEDING INK FROM THE RESERVOIR. THE VALVEIS OPERATED BY DIFFERENTIAL IN PRESSURE AND PROVIDES A POSITIVE CLOSURE DURING NON - WRITING, AND RELIABLE CONTROL OF INK FLOW DURING THE WRITING PROCESS.