Abstract:
A shuttle air supply system which regulates the air pressure in an inktank (10) of an inkjet printer has - a vacuum supply line (11) coupled to a fixed vacuum source (1), - a valve (12) for controlling the opening of the vacuum supply line actuated by a - valve control circuit (9) obtaining measurements from - a pressure sensor (13) sensing the pressure in the ink tank (10) and wherein the pressure in the inktank is regulated by the valve control circuit (9) to a desired inktank pressure. A pressurized air supply line (14) coupled to a fixed value pressurized air supply (4) and an air pressure valve (15) controlled by the valve control circuit (9) can be added to enhance pressure setting range.