Patent ID: 7458663
Filing Date: 2008-12-02
Classification: B41J,G05D,Y10T

Abstract:
1. 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; a valve disc for opening and closing the communication passage; and a valve-disc energizing spring for energizing the valve disc in a valve-closing direction, using as a receiver a spring-receiving portion of the valve housing, wherein the valve housing is constituted of a housing main body and a lid body having the spring-receiving portion and detachably fastened to the housing main body with screws, one end of the valve-disc energizing spring is engaged to the lid body and the other end of the valve-disc energizing spring is engaged to the valve disc, and the valve-disc energizing spring is configured so as to be separated from the housing main body along with separation of the lid body.