CPC G05D 16/0644 (2013.01) [B41J 2/17596 (2013.01); G05D 16/0658 (2013.01); G05D 16/0661 (2013.01)] | 13 Claims |
1. A pressure regulating valve for an inkjet printhead, said valve comprising:
a valve inlet;
a valve outlet;
a fluid flow path defined between the valve inlet and the valve outlet;
an orifice positioned in the flow path;
a movable valve member configured for regulating a fluid flow rate through the orifice;
a regulator chamber having the valve outlet and comprising a diaphragm operatively connected to the valve member, such that movement of the diaphragm moves the valve member relative to the orifice; and
a biasing mechanism for resiliently biasing the diaphragm away from the orifice, wherein the valve member is bell-shaped or trumpet-shaped, and whereby a curved outer surface of the valve member determines an extent of occlusion of the orifice.
|