head held in a head holder and an ink tank mounted on the head holder the ink tank has an ink chamber a path for communicating the chamber with atmosphere and an exit valve to open and close the path the apparatus further comprises an ink cartridge arranged below the ink tank for supplying the ink to the ink chamber through a channel an operating member for opening and closing the exit valve a ink transfer device and a controller the controller performs controls of causing the operating member to open the exit valve such that an atmosphere pressure affects an inside of the ink chamber and such that the ink both in the chamber and in the channel returns to the ink cartridge through the channel and causing the device to fill the chamber application_number US 82520507 A description an embodiment of the invention will be described below with reference to the drawings each suffix of b y m and c added to the numeral indicates that the numeral is used for each of black yellow magenta and cyan inks as shown in fig1 and 2a an inkjet recording apparatus 1 includes an inkjet head 2 the inkjet head 2 is retained by a head holder 3 and the head holder 3 is supported while being relatively movable to a recording medium the inkjet head 2 has a group of nozzles which discharge plural kinds of inks see 2 b 2 y 2 m and 2 c in fig3 specifically the head holder 3 is supported while being reciprocally movable along guide rails 4 a and 4 b extended in a direction orthogonal to a recording medium feed direction by drive means an ink tank 5 is mounted on the head holder 3 to supply.