Patent ID: 7909443

Claim:
An inkjet recording apparatus comprising: an inkjet head that ejects a liquid functional material toward a recording medium based on image signals; a recording medium conveying unit that conveys the recording medium to a position opposing the inkjet head; a supply path that supplies the liquid functional material to the inkjet head; a reservoir that communicates the supply path, and that reserves the liquid functional material; and a degassing mechanism that is provided in one of the inkjet head, the supply path and the reservoir, and that includes a degassing device and a vacuum pump, wherein the degassing vacuum degree of the degassing mechanism is approximately 0.01 to 0.06 atm, further comprising: a control interface (PC) that includes a table showing a relationship between a minimum boiling point of compounds contained in the liquid functional material and the degassing vacuum degree; a pressure controller that controls a degassing vacuum degree of the degassing mechanism; and a vacuum gauge that measures the degassing vacuum degree of the degassing mechanism, wherein the control interface (PC) compares a value measured by the vacuum gauge with a target value, decides the target value based on the minimum boiling point, which is shown in the table, of the compounds of the liquid functional material, and controls the pressure controller to make coincident the value measured by the vacuum gauge with the target value.