Patent ID: 6261015
Filing Date: 2001-07-17
Classification: B43K

Abstract:
A writing instrument comprising:a body with a distal end and a proximal end;a cartridge with a writing end and a butt end, wherein said writing end extends at least partially out of said distal end of said body;a cap detachably attached to said proximal end of said body;a drive rod with a proximal end and a distal end, wherein said drive rod is coupled to said cap for rotating with respect to said cap without moving longitudinally;a control member slidingly disposed in said cap, wherein said distal end of said drive rod engages said control member; anda biasing element positioned between said control member and said cartridge and configured to bias said cartridge in a distal direction;wherein rotation of said drive rod moves said control member longitudinally within said cap, thereby varying the biasing force against said cartridge.