Patent ID: 7993068

Claim:
A writing instrument comprising: a main body comprising a first end and a second end and having a longitudinal axis extending in a longitudinal direction through the first and second ends; a writing tip disposed at the first end of the main body; an ink-containing cartridge; a rear body comprising an elongate housing having a first end a second end and an access opening at the first end allowing the ink-containing cartridge to be inserted into or removed from the housing, the housing extending in a loading direction between the first and second ends of the elongate housing; and an articulation means connecting the main body and the rear body; wherein the articulation means allows the rear body with the ink-containing cartridge inserted in the housing to pivot with respect to the main body about an axis of articulation perpendicular to the longitudinal axis, between a loading or open position in which the access opening is rotated away from the longitudinal axis of the main body and a closed position in which the longitudinal direction and the loading direction substantially coincide, and wherein the closed position is the position of use of the writing instrument where the ink-containing cartridge is engaged with the main body.