Dual capillarity ink accumulator for ink-jet

摘要

An ink-jet writing system having a pen and a detachable ink reservoir. The pen includes a dual capillarity ink accumulator wherein a balance is provided such that the pen nozzles will neither drool ink nor suck up air when the pen is decoupled from the reservoir. A high capillarity member and a low capillarity member of the accumulator respond to changes in volume of a gas bubble within the pen to absorb or expel ink when operational and ambient atmospheric pressure changes occur.