Multiple writing pen made up from three separate writing elements - has any two of these capable of having detachable connection

摘要

A writing pen is designed to take a de-colouring agent for a writing liquid such as ink of limited genuine characteristics. It is connected to a further writing pen to take a writing liquid capable of resisting the de-colouring agent. The two writing pens are combined with a third utensil holding a writing liquid of limited purity. There is a detachable connection between at least two of the connected writing pens. The writing pen holding the ink of limited purity is fitted with a larger writing liquid container than the two other writing pens.