Patent ID: 8573758
Filing Date: 2013-11-05
Classification: B41J

Abstract:
1. A liquid jet recording head comprising: a plurality of liquid discharge ports for discharging a liquid; a plurality of pressure chambers which internally include a discharge energy generating element configured to generate energy used for discharging the liquid; a substrate which has the discharge energy generating element on one surface side and, on another surface side, has a liquid chamber configured to store a liquid to be supplied to the pressure chamber, a pair of paths which are separated from the liquid chamber and communicate with each other, and a liquid supply port which communicates with the liquid chamber and is provided on a side of the pressure chamber, wherein a liquid inlet port which communicates with the one path of the pair of paths, and a liquid outlet port which communicates with the other path of the pair of paths are opened on the one surface of the substrate, wherein the liquid supply port is provided as at least two holes formed along the row of the plurality of the pressure chambers; a liquid flow path for discharging the liquid from the liquid chamber to the pressure chamber via the liquid supply port; and a liquid flow path for circulating the liquid without passing through the liquid chamber from the one path to each of the pressure chambers via the liquid inlet port, and further circulating the liquid from each of the pressure chambers to the other path via the liquid outlet port, wherein an opening area of each of the at least two liquid supply ports configuring the liquid supply port row becomes larger in order of an increasing distance from the liquid outlet port.