Patent ID: 8033655

Claim:
A pressure-regulating valve which is interposed between a functional liquid droplet ejection head for ejecting a functional liquid droplet to perform an imaging process on a workpiece and a functional liquid tank for supplying a functional liquid to the functional liquid droplet ejection head, supplies to the functional liquid droplet ejection head through a secondary chamber a functional liquid introduced from the functional liquid tank to a primary chamber, and opens and closes a communication passage for communicating the primary chamber and the secondary chamber using, as a reference regulating pressure, atmospheric pressure which a diaphragm constituting one surface of the secondary chamber and exposed to atmosphere receives, the pressure-regulating valve comprising: a valve housing forming the primary chamber and the secondary chamber; and a valve disc for opening and closing the communication passage, wherein a pressure-receiving plate is adhered to an inside of the diaphragm and the valve disc is in abutment on the pressure-receiving plate.