PRINTHEAD NOZZLE ARRANGEMENT WITH MAGNETIC PADDLE ACTUATOR
A nozzle arrangement includes a nozzle chamber having a roof defining an ink ejection port and a floor defining an ink supply inlet; a magnetic coil arrangement positioned around the ink supply inlet of the nozzle chamber; bridge members spanning over the magnetic coil arrangement, the bridge members supported on support posts protruding from the magnetic coil arrangement and having a resilient characteristic; and a paddle containing magnetic material and supported from the bridge members over the ink supply inlet, the paddle having a shape matching that of the ink supply inlet. The bridge members normally support the paddle in an open position spaced from the ink supply inlet. The magnetic coil arrangement is configured to attract the magnetic material of the paddle with a force exceeding the supporting tension of the resilient bridge members.
1 . A nozzle arrangement comprising:
a nozzle chamber having a roof defining an ink ejection port and a floor defining an ink supply inlet;
a magnetic coil arrangement positioned around the ink supply inlet of the nozzle chamber;
bridge members spanning over the magnetic coil arrangement, the bridge members supported on support posts protruding from the magnetic coil arrangement and having a resilient characteristic; and
a paddle containing magnetic material and supported from the bridge members over the ink supply inlet, the paddle having a shape matching that of the ink supply inlet, wherein
the bridge members normally support the paddle in an open position spaced from the ink supply inlet, and
the magnetic coil arrangement is configured to attract the magnetic material of the paddle with a force exceeding the supporting tension of the resilient bridge members.
2 . The nozzle arrangement of claim, 1 , further comprising a drive circuitry layer for providing the electrical signals to the magnetic coil to actuate the magnetic paddle.
3 . The printhead of claim 1 , wherein in the open position, the paddle permits ingress of ink into the nozzle chamber and in the closed position, the paddle is received in the inlet to close the inlet.