Recorder pen

Claim 1

A RECORDER PEN COMPRISING MEANS CONSISTING ESSENTIALLY OF NON-WETTABLE PLASTIC MATERIAL DEFINING A GENERALLY BOX SHAPED RESERVOIR FOR HOLDING A SUPPLY OF INK, A HOLLOW NEEDLE EXTENDING THROUGH A BASE PORTION OF SAID RESERVOIR DEFINING MEANS, A TOP OF SAID RESERVOIR INCLUDING A MAJOR PORTION DEFINING AN OPENING THEREIN AND HAVING A DOWNWARDLY EXTENDING FLANGE ADAPTED TO FIT OVER THE UPWARDLY EXTENDING SIDEWALLS OF SAID RESERVOIR AND SEAL SAID TOP TO THE SIDEWALLS AND A CAPPING PORTION ADAPTED TO CLOSE THE OPENING DEFINED BY SAID MAJOR PORTION, AN INTEGRAL STRAP CONNECTING SAID CAPPING PORTION AND SAID MAJOR PORTION, A METAL WASHER DISPOSED BETWEEN A PORTION OF SAID MAJOR PORTION AND THE UPWARDLY EXTENDING SIDEWALLS TO THEREBY FACILITATE SEALING SAID TOP TO SAID RESERVOIR BY MEANS OF INDUCTION HEATING, A VENT TUBE EXTENDING THROUGH SAID MAJOR PORTION OF SAID TOP WITH A SECOND END OF SAID VENT TUBE DISPOSED WITHIN SAID RESERVOIR RELATIVELY CLOSE TO AN INNER PORTION OF SAID HOLLOW NEEDLE, AN INTEGRAL PIN COIL SPRING UNIT, THE SPRING PORTION OF SAID UNIT BIASING THE PIN PORTION THROUGH SAID HOLLOW NEEDLE IN A DIRECTION AWAY SAID TUBE IMPROVES THE FLOW OF INK TO THE POINT OF THE PEN, AN UPWARDLY EXTENDING ANNULAR WALL DEFINING A SLOT DISPOSED WITHIN SAID RESERVOIR POSITIONING SAID SPRING WITHIN SAID RESERVOIR.