Valve marker with metering valve

摘要

The device has a writing tip (40) variably retracted in a writing position. A valve device (30) is opened when a valve seat (30s) is not closed by a valve closure body (33) i.e. plunger. The closure body is actuated by the writing tip. The body with an inner wall (32i) of a valve housing (32) forms a dosing gap for individual dosing of liquid mediums. Clearance of the body is variably adjusted depending on a position of the body and controlled in the writing position of the tip. The gap is shortened for individual dosing of the mediums by retracting the tip and extended by moving the tip.