Inkjet printhead having nozzle chambers with redundant ink inlets
View Patent ↗An inkjet printhead includes: a substrate; a row of nozzle chambers disposed on the substrate; an ink conduit extending longitudinally adjacent the row of nozzle chambers; and a nozzle plate spanning over the ink conduit and the row of nozzle chambers. Each nozzle chamber has a respective ink ejection opening defined in the nozzle plate; a first ink inlet defined in a sidewall of the nozzle chamber for receiving ink from the ink conduit; and a second ink inlet defined in a floor of the nozzle chamber. Each of the first and second ink inlets is in fluid communication with a common ink reservoir.
1. An inkjet printhead comprising:
a substrate;
a row of nozzle chambers disposed on the substrate;
an ink conduit extending longitudinally adjacent said row of nozzle chambers; and
a nozzle plate spanning over the ink conduit and the row of nozzle chambers wherein each nozzle chamber has:
a respective ink ejection opening defined in said nozzle plate;
a first ink inlet defined in a sidewall of the nozzle chamber for receiving ink from the ink conduit; and
a second ink inlet defined in a floor of the nozzle chamber, each of said first and second ink inlets being in fluid communication with a common ink reservoir.
2. The printhead of claim 1 , wherein an ink supply channel is defined in said printhead for supplying ink to a respective row of nozzle chambers, and wherein each of said first and second ink inlets is in fluid communication with said ink supply channel.
3. The printhead of claim 2 , wherein said ink supply channel extends longitudinally along said printhead for supplying ink to said row of nozzle chambers.
4. The printhead of claim 3 having a first row of nozzle chambers for printing ink of a first color and a second row of nozzle chambers for printing ink of a second color, said first row of nozzle chambers being in fluid communication with a first ink supply channel, and said second row of nozzle chambers being in fluid communication with a second ink supply channel.
5. The printhead of claim 2 , wherein said ink supply channel is configured for receiving ink from a backside of said printhead, said backside being an opposite side to an ink ejection side having said nozzle chambers.
6. The printhead of claim 1 , wherein each nozzle chamber comprises an actuator for ejection of ink.
7. The printhead of claim 1 , wherein said actuator is a bubble-forming heater element.
8. A printhead integrated circuit comprising:
a substrate;
a row of nozzle chambers disposed on the substrate, each nozzle chamber comprising an actuator for ejection of ink;
drive circuitry for supplying power to each of said actuators;
an ink conduit extending longitudinally adjacent said row of nozzle chambers; and
a nozzle plate spanning over the ink conduit and the row of nozzle chambers wherein each nozzle chamber has:
a respective ink ejection opening defined in said nozzle plate;
a first ink inlet defined in a sidewall of the nozzle chamber for receiving ink from the ink conduit; and
a second ink inlet defined in a floor of the nozzle chamber, each of said first and second ink inlets being in fluid communication with a common ink reservoir.