Patent ID: 7648297

Claim:
A writing utensil for a free-flowing writing fluid, comprising: a closed reservoir with the free-flowing writing fluid therein that has an outlet aperture for the writing fluid and a further aperture, an elongate writing tip which communicates with the outlet aperture of the reservoir and is slidably supported, and a valve which is disposed inside a communicating path between the writing tip and reservoir and interacts with the writing tip so as to cause the valve to open the communicating path if a force acts onto the writing tip, wherein the further aperture connects the reservoir with a surroundings via an air line, characterized in that a flow limiter is provided inside the communicating path between the reservoir and writing tip upstream of the valve, and the air line is disposed inside the reservoir such that the air inside the reservoir always is in communication with the surroundings via the air line, in all of the positions of the writing utensil, up to a predetermined filling volume.