Patent ID: 9248690
Filing Date: 2016-02-02
CPC Classification: B43K

Claim Text:
1. A writing instrument comprising: a barrel having an opening at a first end and a hollow central core; an ink reservoir disposed within the hollow central core; a ferrule having a first ferrule end and a second ferrule end, the ferrule being coupled to the barrel proximate the opening, the ferrule having a double wall, the double wall including an inner wall and an outer wall, the space between the inner wall and the outer wall forming a well with an opening at the first ferrule end, and the inner ferrule wall comprising a central bore; a nib disposed at least partially within the central bore the nib being in fluid communication with the ink reservoir; and a cap having a first cap end, a second cap end, a first cap wall, and a second cap wall, the cap having an opening at the first cap end formed by the first cap wall, a free end of the first cap wall being located proximate the opening and being sized and shaped to fit within the well between the inner ferrule wall and the outer ferrule wall, and the second cap wall being disposed outside of the well, when the cap is coupled to the ferrule.