METHOD AND DEVICE FOR INJECTING A FIXED QUANTITY OF LIQUID

摘要

THE PRESENT INVENTION IS A METHOD AND APPARATUS FOR EJECTING A VERY SMALL AMOUNT OF LIQUID AT HIGH SPEED AND PRECISELY INDEPENDENT OF THE VISCOSITY OF THE LIQUID. THIS APPARATUS AND METHOD BEGINS BY APPLYING PRESSURE TO THE LIQUID PRIOR TO STARTING EJECTION OF THE LIQUID AND/OR HOLDING A PRESSURE NEAR AN EJECTION ORIFICE (13) AFTER THE END OF LIQUID EJECTION AT A PREDETERMINED SPECIFIC VALUE SO THAT AN EJECTION RATE OF THE LIQUID THROUGH THE EJECTION ORIFICE (13) IS KEPT CONSTANT. THIS APPARATUS AND METHOD IS ABLE TO CONTROL THE LIQUID TEMPERATURE AND ABLE TO REFILL THE LIQUID WITHOUT ENTRAPMENT OF BUBBLES OCCURRING.[FIGURES 1 AND 18]