Patent ID: 6964534

Claim:
A writing instrument configurable between a retracted configuration and an extended configuration, the writing instrument comprising: a body defining an interior volume and an axis, the interior volume accessible through an aperture, the axis passing through the aperture; a nib assembly including a nib, a reservoir for retaining ink, and a coupling element for coupling the nib to the reservoir, the nib assembly located inside the body and reciprocally movable along the axis; a sliding door including an upper end, a lower end, and a slot disposed through the sliding door between the upper end and the lower end, the upper end attached to the coupling element; whereby, when the nib assembly is moved to the retracted configuration, the lower end of the sliding door overlays the aperture; and whereby when the nib assembly is moved to the extended configuration, the slot of the sliding door overlays the aperture and the nib traverses the slot and the aperture.