US Patent 7524036 Liquid ejection head and liquid ejection apparatus

The liquid ejection head having a nozzle through which liquid is ejected, the nozzle having an inertance Mn; a pressure chamber which accommodates the liquid to be ejected through the nozzle; a pressuring device which applies pressure to the liquid accommodated in the pressure chamber by deforming the pressure chamber to eject the ink from the pressure chamber; and a supply side flow passage which communicates with the pressure chamber and supplies the liquid to the pressure chamber, the supply side flow passage having an inertance Ms smaller than the inertance Mn of the nozzle.