Inkjet recording head and inkjet recording apparatus
AssigneeFUJIFILM Corporation
InventorsTetsuzo Kadomatsu, Masaaki Konno
Life of this patent
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Abstract
An inkjet recording head including first and second supply paths. The first supply path supplies ink to the pressure chamber. The second supply path supplies ink to the porous member. Also included is an orifice plate having the ink discharge port, where at least an inner wall of the ink discharge port is made from the porous member capable of being impregnated with ink. A pressure control device controls pressure of the ink to satisfy the equation P1<P2≦P0, where P1 is the pressure of the ink at a meniscus surface inside the ink discharge port, P2 is the pressure of the ink at a surface of the porous member forming the inner wall of the ink discharge port, and P0 is an atmospheric pressure.
Claims3
An inkjet recording head, comprising:
- a pressure chamber communicating with an ink supply port and an ink discharge port;
- a first supply path which supplies an ink to the pressure chamber via the ink supply port;
- an orifice plate including the ink discharge port, at least an inner wall of the ink discharge port being made from a porous member capable of being impregnated with the ink;
- a second supply path which supplies the ink to the porous member;
- and
- a pressure control device which controls pressure of the ink to satisfy P1<P2≦P0,
- where P1 is the pressure of the ink at a meniscus surface inside the ink discharge port, the ink being supplied from the first supply path, P2 is the pressure of the ink at a surface of the porous member forming the inner wall of the ink discharge port, the ink being supplied to the porous member from the second supply path, and P0 is an atmospheric pressure.
Dependencies are inferred from the claim text.