Writing instrument with largecapacity cartridge

Claim 2

IN A BALL-POINT TYPE WRITING INSTRUMENT EMPLOYING RETRACTION MECHANISM TO SELECTIVELY PROJECT AND RETRACT A WRITING TIP RELATIVE TO A BARREL PORTION OF THE INSTRUMENT, THE PROVISION OF: AN INK RESERVOIR OPEN AT A REARWARD END AND IN INK FEEDING COMMUNICATION WITH A WRITING TIP AT A FORWARD END; A MULTI-WINGED INSERT DISPOSED WITHIN SAID RESERVOIR FORMING THEREIN A PLURALITY OF LONGITUDINALLY EXTENDING INK HOLDING CHAMBERS INDIVIDUALLY OPEN AT SAID REARWARD END AND COMMUNICATING IN A COMMON CONDUIT WITH SAID WRITING TIP AT SAID FORWARD END; AIR VALVE MEANS ON SAID REARWARD END OF SAID RESERVOIR FOR PROVIDING A NORMALLY CLOSED AIR TIGHT SEAL OF SAID CHAMBERS AGAINST THE PASSAGE OF AIR; AND MEANS FOR OPENING SAID AIR VALVE MEANS UPON EACH PROJECTION AND RETRACTION OF SAID WRITING TIP OPERATED BY MOVEMENT OF SAID RESERVOIR INTO AN OVERPROJECTED POSITION, SAID AIR VALVE MEANS BEING CLOSED WHEN SAID WRITING TIP AND RESERVOIR ARE IN EITHER RETRACTED OR PROJECTED POSITIONS.