Patent ID: 9550391
Date: 2017-01-24
CPC Classifications: B43K,Y10T

Claim:
1. A retractable ink pen including an elongate ink cartridge having a writing end and an exposed ink opening, wherein the writing end moves from a retracted position to an extended position for writing, the retractable ink pen comprising: a cap defining a first longitudinal axis, the cap including a recess with an inner surface having one of: i) a position structure, and ii) both a first locator and a second locator spaced a distance from the first locator along the first longitudinal axis; an elongate barrel defining a second longitudinal axis aligned with the first longitudinal axis, the elongate barrel including an outer surface having the other of the position structure and both the first locator and the second locator, wherein the position structure is located at the first locator when the writing end is in the retracted position and wherein the position structure is located at the second locator when the writing end is in the extended position wherein the cap includes a coupler configured to fix the location of the cartridge with respect to the cap.