APPARATUS FOR REGULATING PRESSURE DIFFERENCE OF INK JET PLOTTER CAPABLE OF CONTROLLING NEGATIVE PRESSURE OF INK

摘要

PURPOSE: An apparatus for regulating a pressure difference of an ink jet plotter is provided to control negative pressure of ink by preventing negative pressure of ink from being varied due to external factors. CONSTITUTION: An apparatus for regulating a pressure difference of an ink jet plotter includes a compression air generating device. An air filter is provided to remove impurities included in compression air generated from the compression air generating device. A pressure adjusting device is provided to adjust pressure of air passing through the air filter(110) to predetermined pressure. A fluid path converter selectively allows air, which has passed through the pressure adjusting device, to be outputted in a first output direction and a second output direction.