Ink control supply assembly for an ink jet printer

In a single ink supply control assembly for an ink jet printer there is provided a pump (13), regulator valve/pulsation dampener (23), and interconnecting passageways. The regulator valve/pulsation dampener includes a flexible member (41) disposed in a chamber arranged between the fluid input and fluid output. The diaphragm flexes as a function of the pressure in the chamber to control the opening and closing of a bypass valve member (51) and, in addition, damps out both high and low frequency pulsations generated in the ink by the pump. When the pressure in the system increases beyond a predetermined limit the valve member (51) is opened to divert some of the fluid flow into a bypass passageway (11) until the pressure falls below the predetermined limit. The pressure limit in the system can be varied by adjusting the external pressure applied to the flexible member using an adjustment screw and compression spring.